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From a historical point of view of development of human society , human predatory exploitation of natural resources caused by environmental degradation and resource scarcity increasingly great obstacle to social progress and shackles . China since the reform and opening up , the social economy to rapid development , but the concomitant environmental issues but is not optimistic : the high emissions of major pollutants , water quality and air quality in cities is heavier pollution levels . To this end , the State Environmental Protection Administration in the country 's 113 key environmental protection cities are carrying out a comprehensive environmental quality standards work . Lhasa , the object of study , to the the Lhasa urban environment quality standard planning background understand Lhasa natural environment , socio-economic as well as various types of pollution situation on the basis of full investigation , ambient air , surface water environment of the urban area of ??Lhasa as well as sound environmental quality status of the in-depth analysis and evaluation . On this basis , combined with the overall urban planning , economic development goals , environmental quality function zoning program to Lhasa , the use of environmental systems theory , based on the characteristics of different environmental elements , physical models and statistical models , gray theory combined The screening environmental Quality affect the main factors to make a quantitative prediction of urban surface water from 2005 to 2015 , the ambient air , the sound quality of the environment trend analysis . According to the results of predictive analysis , the proposed targeted pollution prevention countermeasures . The results of this study show that : Lhasa water , gas , sound environmental quality of a good ; With the population growth, economic development , to 2015 , the quality of the urban environment will remain stable , not obvious mutation or deterioration Overall can reach the standard requirements of the various types of environmental function area . With the gradual improvement of the municipal infrastructure , raising the level of environmental management , environmental technology advances , Lhasa, the quality of the urban environment is expected to further improve . According Lhasa environmental quality status and socio-economic development goals , quantitative trend forecast 2010 Environmental Quality , relevance and applicability of environmental elements using prediction model has the prediction results of scientific and reasonable , credibility can directly special plan for the development of medium-and long-term pollution prevention information as the basis of long - term environmental planning in Lhasa , has a certain role in guiding and practical value .
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