Causes And Effects Of Water Shortage Environmental Sciences Essay

Causes And Effects Of Water Shortage Environmental Sciences Essay Water crises have focused peoples attention on water shortage and degradation. Scarce water resources have had negative impacts on the world. Dubale states that water shortage and water degradation are causing serious problems for international security and for peoples health. Rozelle, Huang and Zhang (1997) explain that people face water shortages do not have enough water to meet their daily needs, while water degradation causes a decrease in the quality of peoples lives. One cause of water shortage is mismanagement of water resources, and one cause of water degradation is pollution. Water degradation affects people by causing health problems, and water shortage affects international security by causing regional controversies and conflicts. This essay will discuss two main causes of water shortage and water degradation and their effects on people and international security. One main cause of water shortage is mismanagement of water resources. Jiang (2009) states that as water become a limited and scarce resource relative to the dramatically growing human needs, effective management of the limited available water resources becomes critical. However, People have no incentive to save or use water efficiently, so effective management to deal with the externality of water use and market failure is needed. Over the past decades, Chinas water resource management, unfortunately, has been dominated by engineering projects to satisfy water demands rather than improving water use efficiency. The institutional system of water resource management is fragmented and ineffective. Lack of effective coordination and cooperation among water agencies has led to fragmented water resource institutions which prevent effective management of water resources. In addition, water rights system is the foundation of effective water resource management. Unfortunately, Chinas institut ional system of water rights has not been well developed and is not strictly enforced. Managing water resources based on water rights has not been successful. Much of the water use inefficiency and the current water scarcity in China can be attributed to an underdeveloped system of water rights. Pereira, Oweis and Zairi (2002) assume that mismanagement of water resources has increased Chinas vulnerability to increasingly severe water shortages. Farmers are also mismanagement water in China. Hu, Moiwo, Yang, Han, Yang (2010) explain that farmers are usually over irrigating their farms because they forget to turn off the water on time, and over irrigating the farms too often. These irresponsible behaviors waste a large amount of limited water resources, because less irrigation could yield similar productivity (Fan et al., 2012).Therefore, improper management of water causes the shortage of water. One main cause of water degradation is pollution from industry and agriculture. Wang (1989) state that water pollution started with industrial development in the 1950s and had become more serious since the 1970s in China. The major contribution to water pollution is industrial discharges, about 75 per cent of total wastewater being from industry. At present, only 20 per cent of factories have wastewater treatment facilities. Pollutants of wastewater include organic and toxic chemicals, such as phenols, oils, cyanides and heavy metals, they may flow into the rivers to cause hyper-eutrophic and fishless phenomenon for years. In addition, wastewater in industrial production also causes the water degradation. For instance, wastewater produced by some manufacturing activities, such as pulp and paper production, printing and dyeing, leather tanning and coal gasification, have very high concentrations of pollutants which are difficult to biodegrade. Ordinary treatment techniques are difficult to clean these kinds of wastewater. Some effective techniques are known but are too expensive to be acceptable to the factories. This type of pollution is diff icult to control in China. Qadir et al. (2009) state that excessive irrigation, which combined with overuse of chemical pesticides, have caused large scale of water quality deterioration, particularly in downstream areas of the Aral Sea Basin in Kazakhstan, and Uzbekistan, Central Asia. Therefore, water degradation mainly comes from industry and agricultures pollution. Having discussed the causes of water shortage and degradation, this essay will continue to discuss two main effects of water shortage and degradation in relation to international security and to peoples health in developing and developed countries. One main effect of water shortage is that it causes regional conflicts for water resources. Frà ¶hlich (2012) states that the water conflict in Middle East become one of the serious international security problems in the world. The Middle East region is primarily relying on agriculture, water is a highly scare resource in this region and there have been conflicts over the ownership and use of water resources. Water supplies in Middle East are limited, unequal used and overused. Israel has controlled Jordan River and its aquifers, and sells little water to Palestine and Jordan. The current Palestine water supply is restricted and limited by Israel. Israel rejects to acknowledge Palestines water rights, while water consumption of Israel is four to six times higher than Palestinians. These unequal consumption of water caused conflicts among these countries which around the Jordan River. Aliewi (2009) argues that it is necessary to negotiate between the Palestine and Israel in which the International Law will be used to solve the conflict over water. The Palestinians should recover their water rights and fair share in water resources. Haftendorn (2000) also claim that in South America, a long term debate about building the Brazilian-Paraguay dam project on the Parana River caused international conflict between Argentina, Bolivia, Brazil, Paraguay and Uruguay. The project was prevented by countries located at lower basin region, who were afraid that the Parana River might be cut off by the dam and would threat their access to this water resource. Therefore, water shortage has affected the regional conflicts among many countries. One main effect of water degradation is that it causes health problems. Pimentel et al. (2007) state that diseases are spreading by polluted water, such as diarrhea, malaria, tuberculosis, and measles, threating the peoples health. Tarrass and Benjelloun (2012) maintained that forty per cent of peoples deaths are attributed to organic and chemical pollutants. Gleick (2002) conclude that more than two million of infants and children die each year from diarrhea, which is caused largely by contaminated water. Epstein, Ford, Puccia, and Possas (2006) state that polluted water led 80 per cent of the diseases around the world, while 90 per cent of these diseases are spreading in developing countries. Pimentel et al. (2007) also maintain that even in developed countries, diseases caused by water degradation have also had an impact on peoples health. For example, in the USA, diseases caused by water degradation lead to 900 deaths each year (Pimentel et al. 2007). Tarrass and Benjelloun (2012 ) state that polluted water is closely linked diseases. According to Bartram, Lewis, Lenton, and Wright (2005), diseases related to unsafe water is the most common cause of illness and death among the poor people in developing countries. For example, 1.6 million deaths each year can be attributed to health problems caused by water pollution (Bartram, Lewis, Lenton, and Wright, 2005). Therefore, water degradation has affected peoples health. In conclusion, water shortage and water degradation have two main negative effects on people and international security. The main cause of water shortage is mismanagement of water for industrial production, irrigation and leading to regional conflicts on water resources. And the main cause of water degradation is water pollution caused by chemicals which are difficult to biodegrade. Water degradation causes serious diseases for peoples health around the world. In order to solve these problems, all the countries should cooperate together to solve the water crises, distribute water resources rationally, reduce water pollution effectively and purify polluted water rapidly. People around the world should also take responsibility to save water in their daily lives.