Essay on Police and the Community Example | Topics and Well Written Essays - 1250 words

On Police and the Community - Essay Example A lesser barricade could be people’s self-esteem and self-perception (Morris, 2008). This is because they do not view themselves as activists or leaders. This perceptual concern is a barrier for over 36% of the adults in America. Not being an activist or leader is a barrier for 42% of adults who are not involved but wish to be. Disengaged participants in several focus groups stated that they wish for a fearless director with organizational skills, knowledge, plans, enthusiasm, a selfless attitude, and honesty. This group also puts more weight in disliking politics than adults on not knowing anyone else taking part in the activity. In order to overcome these obstacles, authorities that are involved in public participations should ensure that those who are involved in the activity are protected. Authorities need to educate people on these barriers and assure them that they will be safe after they take part in the activity (Thurlow, 2008). Question 2 Policy makers have a tough ta sk of carrying out what is best for their constituents plus their countries. This makes them the voice of the citizens. It is extremely vital that a police chief should be a policy maker for his constituent or country due to several reasons. These reasons are: police chiefs have interests of constituents and interests in the country. They also defend the constitution. Since policy makers are elected by the public, this will also give a chance to police chiefs to be elected by the public. Each policy maker has an obligation of defending the constitution. Police chiefs are also obliged to defend the American constitution, and this makes the liable policy makers (Chief of Police, 2007). A policy maker is a person who is responsible for making the policies of an organization. This includes the government or any other institution that requires regulations. A statesman refers to a diplomat or politician who has had a long, as well as respected duty at the national or international level. It has been said that police chiefs should be politicians. This is not a brilliant idea. Politicians have an obligation of representing and responding to the constituents, voting on legislation, participating in budget discussions and taking part in committees. Even though, police chiefs need to realize these factors, their central duty is to implement the law. This is a vital duty. They need to be separated from political matters so that they could execute their tasks to the fullest. If police chiefs are allowed to be statesmen, then this would interfere with the neutrality of the police force from politics. It will interrupt with the activities of the police force (Samuels, 2000). Question 3 Similarities Community oriented policing as a philosophy that encourages organizational strategies, which hold up the organized use of problem-solving techniques and partnerships, to tackle the immediate factors that give rise to public security issues. The security issues are social disorders , crime as well as fear of crime. Community oriented policing also comprises of three key components in America as well as other nations. These components are: community partnership, organizational transformation as well as problem solving. Most countries, including the United States, think that

Adaptive Project Management Framework Assignment

Adaptive Project Management Framework - Assignment Example This framework is generally used for the projects whose objectives and goals are clearly stated. Basically the framework is an approach that restricted planning for things which are next to impossible. The adaptive project management framework is implemented in project management in order to bring quality business values (Highsmith, 2009, p.167). Moreover, this framework is intended to maximize the business value under specific time and estimated fixed budget. The adaptive project management framework is the structured decision making framework in the face of uncertainty. This framework helps to reduce the uncertainty level of project outcome through quick system monitoring and controlling. As it is based on learning process, it helps to improve the long-term project management outcomes. The study deals with the evaluation of implementing project framework approach in organization. Moreover the study will reveal the obstacles that are faced by organizations while adopting this framew ork. Finally the study ends with the solutions of the problems. Implementation of Adaptive Project Management Framework The project management methodology applied within organizations for the purpose of reconfigure the project management framework. Companies should change the current regulations and policies to successfully execute the adaptive project framework approach that administrate their internal processes.

Critical Response to Martin and Milway’s Editorial Essay Example for Free

Critical Response to Martin and Milway’s Editorial Essay In â€Å"A Productive Labour: The Only Limit to Productivity Growth is Human Ingenuity,† authors Martin and Milway present an argument for increasing productivity as a means of raising Canada’s economic health and living standards. Although Martin and Milway’s editorial on productivity present a piece that is rational and easily understood, its effort to convince that readers of its main argument is encumbered by weaknesses in the authors’ approach and reasoning that lead to more questions being raised than answered in the course of one’s reading. The editorial underlines the importance of improving Canada’s productivity in light of rising prices of manufactured goods and services that accompanied the strengthening of the Canadian dollar in 2001. The main argument put forth is that enhancing productivity is critical in ensuring improvements on the country’s living standards. The authors proceed to support their arguments by presenting two ways by which living standards can be raised, the first by increasing the number of working hours or using up more natural and physical resources for sustained wealth creation, and the second by improving productivity or raising the value created per working hour. After illustrating that the first way is not a viable alternative, the authors then concentrate on convincing the reader why the second way is better by defining the concept of productivity based on efficiency and innovation. The strength of Martin and Milway’s editorial lies in its ability to appeal to the rational side of its readers and their ability to tackle an otherwise complicated subject in simple terms. The authors attempt to defend their arguments by stating facts and carefully defining their subject, that is, productivity. As a result, the readers are compelled to view their argument in consideration of the definition that they present. Unfortunately, several weaknesses in Martin and Milway’s editorial in terms of their approach and in their reasoning reduce the effectivity of their argument. The biggest errors that exist in the editorial are faulty reasoning and the inability of the authors to substantiate their claim. As a consequence, the authors fail to persuade readers that â€Å"productivity is the surest way to raise our living standards. † (par. 4) The editorial was clearly written to convince readers that Canada needs to raise its productivity if it is to continue its economic growth and if it is to raise living standards. On the other hand, the authors fail to present evidence to substantiate this claim aside from the argument that it is the most cost-effective alternative in terms of labour, time, and natural resources. The authors automatically assumed that the readers of the editorial would readily accept that an increase in economic growth follows from an increase in productivity. Likewise, this argument raises several implications: first, that economic growth is not possible without an increased productivity; second, that productivity growth always leads to a raise in the living standards. It is here that the informed audience becomes wary as the authors’ bias shows through in their failure to consider countries with high productivity growth but low living standards. This shows a lack of forethought of the authors in answering the questions that would be inevitably raised by their argument. The main weakness of the editorial is that the authors commit fallacies in reasoning. For one, they are â€Å"begging the question† wherein the reader must already accept the conclusion in order to accept the evidence forwarded (Boyne, et. al. , 69). For instance, the authors enumerate the ways by which productivity can be improved to support their main contention. They state that â€Å"productivity increases in one of two ways: greater efficiency in how we employ labour and capital, or greater value creation per unit of these inputs. †(par. 8) This flow of the discussion reflects an assumption on the part of the authors that their main argument has already been accepted by the readers since discussing the ways by which productivity can be improved does not necessarily support the argument that productivity will improve the country’s economy. This circular reasoning makes the reader feel like the authors are trying to sound logical but cannot support their argument beyond the definition of the subject. Another obvious error in reasoning in the Martin and Milway’s editorial is superstition (Boyne, et. al. , 70) or hasty generalization. The authors attempt to prove the argument that â€Å"Productivity growth also benefits workers and consumers† (par. 14) by stating that â€Å"countries and regions with higher productivity pay higher wages† (par. 14) which assumes that higher wages automatically result from higher productivity. If one is to follow this argument, then it would imply that countries and regions that pay lower wages are not productive or low in productivity. In sum, a critical analysis of the piece reveals that the weaknesses outweigh the positive aspects in Martin and Milway’s editorial. Shortcomings in substantiating the editorial’s central argument with credible evidence as well as the inability to defend their argument in a logical manner renders the entire editorial ineffective in convincing the reader of the importance of improving productivity to improve their lives.

Effect of Earnings Decline on Crime Levels

Effect of Earnings Decline on Crime Levels Module: Contemporary Issues in the UK Economy Use an appropriate supply and demand framework to explain how a decline in earnings from legitimate work would be expected to affect the level of crime. To what extent does evidence from the UK support this theoretical prediction? The idea that low earnings affect crime is not a new idea; Aristotle (350 B.C.) himself said â€Å"poverty is the parent of revolution and crime† (pg. 32). Since then, there has been much research in the field since policymakers require this information to create effective crime-reducing policies. In recent years, falling real wages has been a significant issue since the UK is in the longest period of pay stagnation since 1855 (The Economist, 25th Oct 2014). I will discuss the impact of falling wages on the crime rate by using an economic supply and demand framework and comparing my findings to real evidence from UK data. Both Becker (1968) and Freeman’s (1999) work make the assumption that criminals are rational economic agents and hence criminal activity can be modelled using a supply and demand framework in the same way one could a goods or services market. Economic theory states that the supply of crime depends on four components: potential earnings from committing a successful crime (Wc), probability of being caught (p), level of punishment (S) and wages earned from legitimate work (W). This can be shown in the following inequality: (1-p)U(Wc)-pU(S)>U(W) The left hand side represents the potential net benefit gained from committing the crime and the right hand side shows the utility of legitimate earnings. So the individual will commit a crime if the net benefits of committing the crime exceed the benefits of legitimate work. These factors which influence whether an individual decides to commit a crime or not can be aggregated to create the following function for Criminal Participation (CP): CP=f (Wc, P, S, W). The demand function of crime describes how the level of crime in society falls as individuals take increasing preventative measures (Cook, 1986) and therefore, the demand curve is downward sloping. However, the level of demand for committing crimes varies depending on the type of criminal activity undertaken. Freeman (1999) differentiates between â€Å"victimless† and â€Å"victims† crime suggesting that â€Å"victimless† crime carries obvious economic gain, e.g. dealing drugs, whereas â€Å"victims† crime has no obvious economic benefit e.g. violent crime. However, the downward sloping demand curve for â€Å"victims† crime is less intuitive so most work focusses on â€Å"victimless† crime. It is worth noting that one of the limitations of this supply and demand model in analysing crime rates is that it does not take into account non-economic incentives i.e. the feeling of doing wrong versus earning an honest living. Having discussed how to model crime using supply and demand analysis, I will now use these economic tools to illustrate a situation where wages are falling. If wages from legitimate work (W) fall, the supply curve will shift outwards since the opportunity cost of crime has fallen. Using the inequality previously discussed ((1-p) U(Wc)-pU(S)>U(W)), if legitimate earnings (W) fall, assuming ceteris paribus, the benefits of committing the crime are relatively higher. Hence more people will be willing to commit crimes. This is shown in Figure 1 as the shift from CP1 to CP2. Cantor and Land (1985) call this the motivation effect. As shown here, the outward shift of â€Å"supply† of crime (CP1 to CP2) results in an increase in the amount of crime committed (Q1 to Q2). However, there is also a fall in potential earnings from crime (Wc1 to Wc2); if wages fall, the value of consumer goods being bought is likely to fall so there are fewer valuable goods available to steal. This is the Opportunity Effect (Cantor and Land, 1985). So the fall in wages could actually reduce the crime level. It is difficult to gauge which effect, Opportunity or Motivation, is stronger. One factor which could affect this is whether low or high wages are falling. Machin and Meghir (2004) make this distinction by analysing the 25th wage percentile to capture lower skilled workers whose opportunity cost of committing is lower (Freeman, 1999). Machin and Meghir use data from England and Wales (1975-1996) and focus on vehicle and property crime as these are more likely to be driven by economic incentives than e.g. violent crimes. Figure 2 shows the relationship between the level of wage growth in an economy and the level of crime. The close proximity of the points on the graph to the regression line (calculated using a weighted least squares regression) shows a relatively strong negative correlation between the variables and the slope of the regression line gave a value of -1.580; hence, as the 25th percentile wage rises by 1%, the property crime rate is expected to fall by 1.580%. Machin and Meghir’s work supports the theoretical analysis that falling wages leads to higher crime rates for low paid workers. Therefore if low wages fall, the Motivation effect exceeds the Opportunity effect. We can also look at more recent wage and crime data from the UK to see if it supports the conclusion, that falling wages leads to higher crime rates, drawn from supply and demand analysis. As shown in Figure 3, there has been a downward trend in the real wage rate in the UK since the financial crash in 2007, real wage growth was around 10% but this has fallen to -9% by 2014. Using economic theory, it is evident that if real wages fall, then tax revenue earned by the government is likely to decrease through e.g. lower income tax revenue. Moreover, if people have lower earnings, government’s spending in transfer payments e.g. benefits is likely to rise. The situation of falling tax revenue and higher demand for public services has led to a worsening budget balance so the Coalition government adopted austerity measures. This has affected many areas of public sector spending, including the police force where there have been  £2.5bn in budget cuts since 2011, and an estimated 70% of these cuts have been in officer cuts (BBC News, 22nd July 2014). This leads to a fall in the probability of being caught (P) and severity of punishment (S), since severe punishments are typically more expensive. The effects on P and S are â€Å"second round† effects derived from falling wages. Using the CP function, one would expect that if P and S fall there is a rise in crime. However, national crime statistics demonstrate a reduction in the level of crime in the UK (figure 4): So it is evident that crime has been falling since around 1995 as shown by the Crime Survey for England and Wales (CSEW) data estimate. Since the financial crash, crime has fallen from around 10.5 million in 2008/2009 to 8.5 million in 2012/2013. This contradicts the conclusion made using supply/demand analysis that falling wages leads to higher crime rates. However, David Cameron argues that remaining policemen have been asked â€Å"to do more with less resources [and they] have performed magnificently (Gill, 2013). However, critics argue that there are other factors which have reduced crime statistics. Gill (2013) points towards technological advancements as a significant reason for a falling crime rates. Firstly, car manufacturers are able to include central locking systems which makes it more difficult for criminals to break in. Secondly, car break-ins are typically a â€Å"starter crime† leading onto more serious crimes such as drug dealing; if fewer people are getting involved in crime at this lower level then there will be less crime overall. Thirdly, Gill (2013) highlights the way crime is reported as being a problem since there has been growth in online and high tech crime, for example, online credit card fraud, which is not taken into account in the CSEW crime statistics. Therefore, the â€Å"second round† effects, that falling wages/tax revenue force governments to cut police funding results in more crime, may not be felt since technological advancements have resulted in less (reported) crime. That said, the Ministry of Justice (MoJ) made a statement (2010) explaining how it planned to stabilise the number of prisoners until 2014/2015 and after this it would look at reducing the number by 3000 fewer than the figure as of 19th November 2010 (85,393). So while austerity measures have been implemented by the government, the severity of punishments has yet to fall significantly; this may be another reason why the crime rate did not increase whilst wages have been falling. It will be interesting to see whether going forward now crime rates increase since the MoJ is aiming to reduce the number of prisoners. In conclusion, it is evident that a supply and demand framework to model the effect of falling wages on crime cannot fully explain the situation we are currently in. In all fairness, Machin and Meghir’s work did support these findings, however more recent wage and crime data has contradicted the expected outcome. Therefore, although using a supply and demand framework can explain the impact of falling wages on crime to an extent, other factors, such as technological developments, may also influence the crime rate and policymakers who are trying to tackle crime need to ensure these other factors are also taken into account. Bibliography Aristotle (350 B.C.E.) Politics. Translated by B. Jowett. 1999. Kitchener: Batoche Books. Becker, G. (1968) Crime and Punishment: An Economic Approach. Journal of Political Economy, 76 (2): 169-217. Becker, G. (1992) The Economic Way of Looking at Life. Nobel Prize [transcript], Wednesday 9th December, Available from: http://www.nobelprize.org/nobel_prizes/economic-sciences/laureates/1992/becker-lecture.pdf [Accessed 18th November 2014]. Blunt, C. (2010) Imprisonment for Public Protection. House of Commons Debate [transcript], Tuesday 23rd November, Available from: http://www.publications.parliament.uk/pa/cm201011/cmhansrd/cm101123/debtext/101123-0001.htm [Accessed on 20th November 2010]. Cantor, D. and Land, K. C. (1985) Unemployment and crime rates in the post-World War 2 United States: A Theoretical and Empirical Analysis. American Sociological Review, 50 (3): 317–332. Cook, P. J. (1986) The Demand and Supply of Criminal Opportunities. Crime and Justice, 7: 1-27. Crime in England and Wales: Quarterly Bulletin. The Office of National Statistics [online], 19th July 2012. Available from: http://www.ons.gov.uk/ons/dcp171778_273169.pdf [Accessed 16th November 2014]. Dolphin, T. (2014) Bleak figures show a relentless slide towards a low-pay Britain. The Observer [online], Sunday 19th October. Available from: http://www.theguardian.com/business/2014/oct/18/economy-bleak-british-workers-technology [Accessed 18th November 2014]. Ehrlich, I. (1996) Crime, Punishment and Market for Offenses. The Journal of Economic Perspectives, 10 (1): 43-67. Freeman, R. (1999) â€Å"The Economics of Crime.† In Ashenfelter, O. and Card, D. (ed.) Handbook of Labour Economics, 3. Amsterdam, Netherlands: North Holland Publishers. pp. 3530-3571. Gill, M. (2013) David Cameron is wrong: falling crime rates are not because of the magnificent police. New Statesman [online], Thursday 18th July. Available from: http://www.newstatesman.com/politics/2013/07/no-david-cameron-falling-crime-rates-are-not-because-magnificent-police [Accessed on: 17th November 2014]. Machin, S. and Meghir, C. (2004) Crime and Economic Incentives. The Journal of Human Resources, 49 (4): 958-979. Police forces in England and Wales ’rise to the cuts challenge’. BBC News [online], 22nd July 2014. Available from: http://www.bbc.co.uk/news/uk-28415123 [Accessed 18th November 2014]. Real Wages: What Recovery?. The Economist [online], 25th Oct 2014. Available from: http://www.economist.com/news/britain/21627665-workers-continue-feel-pinch-what-recovery [Accessed 18th November 2014].

The play A Memory of Lizzie is a fictional look at the childhood years

The play â€Å"A Memory of Lizzie† is a fictional look at the childhood years of the infamous murderess Lizzie Bordon The Memory of Lizzie Bordon The play â€Å"A Memory of Lizzie† is a fictional look at the childhood years of the infamous murderess Lizzie Bordon. Set in America the late eighteen hundreds, the play takes place in an average middle class neighbourhood in Massachusetts at that time. The play takes place in an average suburban school, and the characters are (or at least the children of) moderately wealthy people. The Characters in the play are the childhood acquaintances of Lizzie Bordon, each aged around twelve years old, though due the era they would probably be less mature than modern day twelve year olds. Each character has a different attitude towards Lizzie which becomes apparent as the play continues. The children Ann Dorothy Barbara Irma Jo and Kathy all bully Lizzie, while Christy and Georgina pity her. The character Rachel Brayton is a very quiet character, possibly younger than the other children present in the scene and therefore more fearful towards Lizzie. The set in the scene that we performed consisted of some steps to represent the schools steps and a pair of curtains to represent doors. The scene starts with the children frozen, some playing with a ball, others with cards and three with a skipping rope. The only other prop that we needed was the doll that Rachel Brayton played with. Costumes would include schools uniforms, gr...

The House on Mango Street Cultural Values :: House Mango Street

The House on Mango Street Cultural Values Sandra Cisneros' strong cultural values greatly influence The House on Mango Street. Esperanza's life is the medium that Cisneros uses to bring the Latin community to her audience. The novel deals with the Catholic Church and its position in the Latin community. The deep family connection within the barrio also plays an important role in the novel. Esperanza's struggle to become a part of the world outside of Mango Street represents the desire many Chicanos have to grow beyond their neighborhoods. Religion holds a powerful position in the lives of Latinos. It provides a built in censor of right and wrong in the form of extreme guilt (Aranda 150). The chapter "A Rice Sandwich" divulges the way guilt is established. Here Esperanza wants to eat at the canteen for lunch, but the nuns just insult her, and this makes her cry. She says they were "...pointing to a row of three ugly flats, the one the raggedy men are ashamed to go into. Yes...though I knew that wasn't my house" (Cisneros 45). The fact that her victimizers were nuns made her even more embarrassed about where she lived than she already was. Family can either be a brick of foundation or a wrecking ball in the Chicano world. Cisneros says, "We're very family centered, and that family extends to the whole Raza" (Aranda 150). Throughout Mango Street Esperanza's family is a brick of foundation. Esperanza's best friend is her sister. She also has fun at her aunt's expense, and she inherits her grandmother's first name. This inheritance symbolizes the strong family bond of Latinos in their effort to keep the family names alive. Esperanza dreams of someday having a satisfying life. She doesn't want her path of freedom to be cleared by having a baby or finding a husband. She has no desires to fall into the trap of dependency. As the author writes, "Her power is her own. She will not give it away" (Cisneros 89).

Hydraulics and Hydrology Lec

48362 – HYDRAULICS and HYDROLOGY James E Ball – Hydrology Component SUBJECT DETAILS 1 CONTACTS ? Assoc Prof James Ball ? ? ? james. [email  protected] edu. au ph – 9514 2623 Office Hours ? ? Monday 2:00 – 4:00pm Contact by email for appointment SUBJECT CONCEPT The objective of this component of the subject is: ? Introduce engineering hydrology; ? Introduce hydrological processes; ? Introduce flood estimation; and ? Introduce engineering hydrology applications in water resources management. 2 SUBJECT CONCEPT This introduction is aimed at: ? Providing an ability to apply commonly used methods in hydrology; and ?Provide an understanding of the theory behind these methods. REFERENCES Three references that may be useful are ? Applied Hydrology – Chow, Maidment & Mays, McGraw-Hill Book Co. ? Hydrology An Australian Introduction – Ladson, Oxford University Press ? Australian Rainfall & Runoff – A Guide to Flood Estimation – Engineers Australia No published Course Notes are available for this subject. 3 SUBJECT DOCUMENTS UTS-Online will be used for distribution of ? Copies of lecture slides; ? Reading material; and ? Tutorial problems. Students should note that additional reference books may be noted in the lecture slides.LECTURE STRUCTURE Each Hydrology lecture period will comprise: ? 2 hour lecture; and ? 1 hour tutorial. It is expected that students will have accessed the lecture slides, reading material and tutorials prior to the lecture period. 4 SUBJECT TIMETABLE Date Topic 27 February Hydrology and Water Resources 5 March Meteorology 12 March Hydrologic Data 19 March Surface Water 27 March Storm Runoff 2 April Hydrologic Design 9 April Design Rainfall 1 May Peak Flow Estimation 7 May Hydrograph Estimation – Part 1 13 May Hydrograph Estimation – Part 2 14 May Environmental Flows 21 May Water Sensitive Urban Design 4 JuneCourse Review HYDROLOGIC CYCLE Lecture 1 5 CONTENT ? Introduction to Hydr ology ? Development of Hydrology ? Hydrologic Cycle ? Australian Hydrology INTRODUCTION 6 DEFINITION OF HYDROLOGY Greek word: Hydor => water & ology => study of Hydraulics comes from Greek word hydraulikos which in turn comes from hydor (Greek for water) and aulos (meaning pipe). DEFINITION OF HYDROLOGY UNESCO (1979)1 defines hydrology as â€Å"the physical science which treats the waters of the Earth, their Occurrence, Circulation and Distribution, their Chemical and Physical Properties, and their Reaction with the Environment†. UNESCO, (1979), Impact of urbanisation and industrialisation on water resources planning and management, Studies and Reports in Hydrology, UNESCO, UNESCO, Paris. 7 WATER Water is essential for maintenance of life. Early civilisations were concentrated on rivers ? ? establishment of settlements near rivers analogous to looking for signs of water on Mars Management of water is multi-disciplinary; many professions are involved. WATER Variety of problems encountered include ? Flood mitigation ? Sanitary sewer systems ? Land drainage ? Water Supply ? Culvert and bridge design ? Environmental Flows ? Erosion ?Mine tailings ? Drought ? Adaptation to climate change ? Irrigation systems ? Hydro-electric and power generation ? Stormwater systems 8 RURAL FLOODING URBAN FLOODS 9 STORMWATER STRUCTURES STORMWATER DRAINS 10 WATER SUPPLY HYDRO-ELECTRIC POWER 11 IRRIGATION SCHEMES DROUGHT 12 DEVELOPMENT OF HYDROLOGY Ancient civilisations were integrated with their river valleys. Examples are ? ? ? ? ? Egyptian Civilisations and the Nile Valley Mesopotamian Civilisations and the TigrisEuphrates Indian Civilisations and the Indus Valley Ancient China and the Yellow River Andean Civilisations and Coastal Peru DEVELOPMENT OF HYDROLOGYMany of structures from early civilisations are still in operation. Large scale irrigation and drainage works were associated with these civilisations. Earliest recorded dam is about 2900BC (the Sadd Al-Kafara at Wadi Al-Garawi, 25km south of Cairo) Used for both flood protection and irrigation. Also site of earliest known dam failure. 13 DEVELOPMENT OF HYDROLOGY Oldest surviving dam in the world is the Grand Anicut Dam on the Kaveri River in Southern India. This structue dates back to 2nd Century AD. DEVELOPMENT OF HYDROLOGY Water supply to Ancient Rome has been estimated as being approx 500L/c/d.Current water supply requirements are ? ? ? Australian cities, design – approx. 430L/c/d Australian cities, actual – approx. 230L/c/d US cities, design – approx 600L/c/d Drainage structures (such as the Cloaca Maxima) from Ancient Rome are still being used today. 14 ANCIENT ROMANS Cloaca maxima Bath, UK AQUEDUCTS Pont du Gard, France c19 BC Hampi, India 1st century AD 15 DEVELOPMENT OF HYDROLOGY Flood protection has been practiced for thousands of years along the Yellow and Yangtze Rivers. It remains an issue of concern in these areas to the current day. DEVELOPMENT OF HYDROLOGY Wat er has been of interest for many years.Ancient Greek and Roman philosophers speculated on a hydrologic cycle – Homer, Plato, Aristotle, Lucretius, Seneca, Pliny. This cycle was developed from their observations of water in their environment. Use of observations remains a fundamental component of current hydrologic applications and research. 16 DEVELOPMENT OF HYDROLOGY Chinese recorded observations of rain ? ? ? An-yang oracle bones as early as 1200BC; Used rain gauges around 1000BC; and Established systematic records about 200BC. Indian records date back to 400BC. DEVELOPMENT OF HYDROLOGY Scientific development of hydrology occurred uring the Renaissance period. Examples are ? ? ? Leonardo da Vinci – velocity distributions in streams. Bernard Palissy – springs originated from rainfall. Pierre Perrault – runoff is a fraction of rainfall. 17 DEVELOPMENT OF HYDROLOGY Other contributions during this period were made by ? ? ? ? ? Galileo Newton Bernoulli Euler Lagrange DEVELOPMENT OF HYDROLOGY Significant scientific development occurred in the 19th Century when ? ? ? ? ? Dalton proposed the principle of evaporation. Hagen-Poiseuille described capillary flow. Mulvaney developed the Rational method. Darcy described mathematically porous media low. Rippl developed methods for determining storage requirements. 18 DEVELOPMENT OF HYDROLOGY 20th Century saw rapid development of quantitative hydrology. Biggest influence during this period was the development of the digital computer and the development of catchment modelling systems. Limitation now is data availability rather than calculation capacity. HYDROLOGIC CYCLE 19 HYDROLOGICAL CYCLE One of the fundamental cycles of nature. Basis for the science of hydrology. Important points ? ? ? ? Cycle has no start and no end. Cycle is continuous. Flow of water in the cycle is not continuous.Water moves erratically through the cycle. HYDROLOGICAL CYCLE 20 HYDROLOGICAL CYCLE HYDROLOGICAL CYCLE 21 HYDROL OGICAL CYCLE HYDROLOGICAL CYCLE General components of the cycle are ? Atmospheric Water ? Surface Water ? Ground Water In analysis of water resource problems, these components are treated with a systems approach. 22 SYSTEMS CONCEPT A systems concept is applied when considering the hydrological cycle or some component thereof. This is consistent with the reductionist concept used in many engineering problems. SYSTEMS CONCEPT The reductionist philosophy is based on reducing the system to a number of smaller omponents. The response of the system then is determined from summation of the responses of the individual components. 23 SYSTEMS CONCEPT WATER BALANCE 24 WATER BALANCE Amount of water does not change. Where it may be found does change. Water maybe found in the seas and oceans, in the atmosphere, on the surface, below the surface, and in biological systems. WATER BALANCE ITEM Oceans Polar Ice Groundwater Lakes Soil Moisture Atmospheric Water Rivers Biological Water ?Water VOLUME (k m3) % TOTAL WATER 1. 338 x 109 96. 5 24. 0 x 106 1. 7 23. 4 x 106 1. 69 187. 9 x 103 0. 0138 16. 5 x 103 0. 0012 12. 9 x 103 . 001 2. 1 x 103 0. 0002 1. 1 x 103 0. 0001 1. 386 x 109 100. 0 UNESCO, 1978 – ref 11, ladson ch1 25 WATER BALANCE Not all water is freshwater. Only approx 2. 5% of the water is fresh water – water in the oceans and some lake water and ground water is saline. Considering only fresh water, the values in the previous table are modified to WATER BALANCE UNESCO, 1978 ITEM VOLUME (km3) % TOTAL WATER Polar Ice 24. 0 x 106 68. 6 Groundwater 23. 4 x 106 30. 1 103 0. 26 Soil Moisture 16. 5 x 103 0. 05 Atmospheric Water 103 0. 04 Rivers 2. 1 x 103 0. 006 Biological Water 1. 1 x 103 0. 003 Fresh Water 35. 0 x 106 00. 0 Lakes 187. 9 x 12. 9 x 26 WATER BALANCE Basis of any volume based problem is a water balance. This is a usage of the concept of continuity. In general, application of continuity gives in volume terms Inflow – Outflow = Change in Stora ge (? S) And in flux terms Qi – Qo = ? S / ? t WATER BALANCE Components of inflow for a water body such as a lake or reservoir are ? Precipitation (P) ? Inflow from rivers or groundwater (I) 27 WATER BALANCE Components of outflow for a water body such as a lake or reservoir are ? Evapo-transpiration (ET); ? Outflows – Extractions, Downstream flows, (O); and ? Seepage (G)WATER BALANCE Hence the water balance for a water body is P + I – O – ET – G = ? S 28 WATER FLOWS While the volume of water in a source is important, the flux of water through a component is important also. An indication of the flux can be obtained from the diagram of the hydrological cycle. WATER FLOWS The Global Annual Water Balance is shown on in units relative to the annual volume of precipitation on land masses. Note that this is a flow rate (km3/yr). 29 WATER FLOWS ? Precipitation ? ? ? ? Land – 119,000 km3/yr (800mm/yr) Ocean – 458,000 km3/yr (1270mm/yr) Total à ¢â‚¬â€œ 577,000 km3/yr Evaporation ? ? ?Land – 72,000 km3/yr (484mm/yr) Ocean – 505,000 km3/yr (1400mm/yr) Total – 577,000 km3/yr WATER FLOWS ? Runoff to Oceans ? ? ? Rivers – 44,700 km3/yr Groundwater – 2,200 km3/yr Total Runoff – 47,000 km3/yr (316mm/yr) 30 WATER FLOWS Considering the volume and flux gives the mean residence times in a particular source. The mean residence time for atmospheric water is obtained by dividing the volume (S) of water in the atmosphere by the flux (Q), ie TR ? S 12,900 ? ? 0. 022 yr ? 8. 2days Q 577,000 WATER FLOWS ITEM Oceans Polar Ice & Glaciers Groundwater Lakes Soil Moisture Rivers Atmosphere Biological WaterTR 2600 years 1100 years 700 years 13 years 155 days 13 days 8. 2 days 3. 4 days 31 AUSTRALIAN CLIMATE AUSTRALIAN CLIMATE â€Å"†¦of droughts and flooding rains† 32 RIVER RUNOFF Australia has low runoff per unit area (average depth of surface runoff). Also, Australian runoff has greater vari ability due to lack of snow melt period. RAINFALL COMPARISON Variability of Annual rainfall 20 18 Coefficient (%) 16 14 12 10 8 6 4 2 0 A ustralia S. A frica Germany France NZ India UK Canada China USA Russia Country 33 AUSTRALIAN CLIMATE CLIMATE CLASSIFICATIONS Marked wet summer and dry winter of northern Australia.Wet summer and low winter rainfall of southeast QLD and northeast NSW. Uniform rainfall in southeast Australia. Wet winter and dry summer of southwest WA and parts of the southeast. Arid area comprising about half of the continent More on BoM website 34 AUSTRALIAN RAINFALL Pluviometer Network Daily Read Network PRECIPITATION 35 AUSTRALIAN RAINFALL City Average Annual Rainfall (mm) Average Number of Rain Days Darwin 1714 111 Sydney 1217 138 Brisbane 1149 122 Perth 786 114 Melbourne 653 147 Canberra 623 105 Hobart 569 135 Adelaide 530 121 Alice Springs 279 31 After Ladson, 2008 AUSTRALIAN CONDITIONSAustralian rainfall is influenced by general circulation patterns. Most of Australia is around 30o latitude which tend to be areas of descending air. Note – that the solar equator moves during the year. 36 AUST. CLIMATE VARIABILITY Known major causes Approximate time scale Effect Synoptic weather patterns Day / week â€Å"Weather† Southern Annular Mode Weeks +ve phase => winter rainfall deficiencies in southern Australia; summer increases in MDB El Nino / La Nina (Southern Oscillation Index) Inter-annual El nino => lower rainfalls La nina => higher rainfalls Indian Ocean Dipole Inter-annual ve phase => increased rainfall +ve phase => decreased rainfall Inter-decadal Pacific Oscillation Inter-decadal Flip flops between drier and wetter periods e. g. 1st half of 20th century wetter than 2nd half The Australian climate – influences http://www. bom. gov. au/watl/about-weather-and-climate/australian-climate-influences. html 37 The Australian climate – influences The Australian climate – topography 38 Seasonal rainfall variatio n across the country Seasonal rainfall variation across the country Mean rainfall – Katherine mm Mean rainfall – Dubbo mm 240 220 200 180 160 140 120 100 80 60 40 0 0 240 220 200 180 160 140 120 100 80 60 40 20 0 J F M A M J J A S O N J D F Mean rainfall – Alice Springs mm M A M J A S O N D Mean rainfall – Sydney mm 240 220 200 180 160 140 120 100 80 60 40 20 0 J 240 220 200 180 160 140 120 100 80 60 40 20 0 J F M A M J J A S O N D J F M A M J J A S O S O N N D Mean rainfall – Perth mm Mean rainfall – Strahan mm 240 220 200 180 160 140 120 100 80 60 40 20 0 J F M A M J J A S O N D 240 220 200 180 160 140 120 100 80 60 40 20 0 Perth wind rose February J F M A M J J A D Rainfall variability – a comparison Annual rainfall – Birdsville mm 600 400 200 2000 1980 1960Annual rainfall – Bourke mm Annual rainfall – Perth 1940 1920 1900 0 mm 1000 1400 1200 800 1000 600 800 600 400 400 200 200 1980 1960 1940 1920 1900 1980 19 60 1940 1920 1900 1880 1880 0 0 39 NSW annual rainfall time-series New South Wales Annual Rainfall 1000 900 Dry Period: 1900 – 1946 Average Rainfall: 477. 7mm *Dry conditions commenced 1890 Standard Deviation: 90. 4 Wet Period: 1947 – 2000 Average Rainfall: 573. 9mm 20. 1% increase Standard Deviation: 127. 0 800 New Dry 2001/06 439. 5mm 23. 4% decline Rainfall (mm) 700 600 500 400 300 200 100 0 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 Year 40