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The extent of water scarcity in Mexico is so serious that the government released an advertising campaign titled "February 2010: The City May Run Out of Water".〔Krebs M, 2009. "(Water shortage in Mexico City could echo the global water issue )", Digital Journal. Retrieved 10 September 2011〕 With an ever-increasing demand and an increasingly limited supply, certain cities in Mexico risk being void of water. Currently in Mexico, agriculture accounts for 77% of water use, industry 10% and domestic uses account for 13%.〔Taylor J, 2008. "(Water Crisis: Availability Of Water In Mexico )", Mexconnect. Retrieved 10 September 2011〕 As a consequence of the 1980 economic crisis, the Mexican irrigation infrastructure became a victim of underinvestment and neglect. Of the 82 irrigation districts present, 42 are in a state of slow deterioration,〔Giugale M, 2001. "(Mexico, A Comprehensive Development Agenda for the New Era )". The World Bank〕 exacerbating an inefficient usage of water. Furthermore, in a water-saving tax ''Tarifa 09'', the biggest users of water by far - the farmers, were actually exempted.〔 With an increasing population and considerable economic activities, the Mexican residents of semi-arid and arid north, northwest and central regions use on average 75 gallons of water a day, compared to their US counterparts who use only 50.〔Casey N, 2009. "(Weather Worsens Mexico City's Water Shortage )", Wall Street Journal. Retrieved 10 September 2011〕 These regions also account for 84% of Mexico's GDP, 77% of the population, but have only 28% of runoff water supply.〔 Such high demand factors coupled with low water supplies, means water scarcity is particular evident and serious in these regions. Mexico is also heavily dependent on underground aquifers, as it continues to draw water from these sources to supply almost 70% of its needs. However, the rate of extraction has far exceeded replenishment. Currently, 101 of the 653 aquifers in Mexico are severely exploited,〔National Water Commission of Mexico, 2010. "(Statistics on Water in Mexico, 2010 edition )" Pg 20. Retrieved 10 September 2011〕 all of which are located in the water scarce regions. Continual draining of water from such aquifers have resulted in the city plunging some 10 metres in the past century,〔Sample I, 2004. "(Why is Mexico City Sinking? )", The Guardian. Retrieved 10 September 2011〕 clearly indicating that other alternatives are required to sustain the water supply of Mexico. An alternative is the tapping of water from the Cutzmala dam system. Huge pipes that used to expel wastewater to prevent flooding are now being used to pipe water into the city from the dam system.〔Ellingwood K, 2009. "(Mexico water shortage becomes crisis amid drought )", Los Angeles Times. Retrieved 10 September 2011〕 Water is transported across a total distance of 180 kilometres and almost 1000 metres in altitude to reach water scarce states.〔Easter, K William, 1998. Markets for Water, Potential and Performance Page 2, Kluwer Academic Publisher〕 However, this presents no viable long-term solution either, as the dam system itself is drying up. Enduring the worst drought in 70 years, the Cutzamala basin is only at 47% of its capacity.〔Grillo I, 2009. "(Dry Taps in Mexico City: A Water Crisis Gets Worse )", TIME. Retrieved 10 September 2011〕 Yet its water level continues to fall rapidly.〔 Providing a fifth of Mexico's water,〔 the poor infrastructural state of the aged system underscores a loss of 40% or 6000 litres of water every second before reaching Mexico.〔Andrea A, 2011. "(Water Loss: 6000 Liters Per Second! )". Retrieved 10 September 2011〕 Repair projects requiring M70million have since been shelved, contributing to the standstill in efforts to solve Mexico's water scarcity problem. ==See also== * Water supply and sanitation in Mexico * Water resources in Mexico * Water scarcity in Africa 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Water scarcity in Mexico」の詳細全文を読む スポンサード リンク
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