Abstract:

Water pollution,one of the most serious environmental problems of the Dianchi lake,severely influences the sustainable development of social and economy in Kunming city.For a more detail assessment on the water pollution economic loss,spacetime geostatistics is used to simulate the concentration distribution of each water pollution factor based on the water quality data obtained from 8 observations stations in the Dianchi lake,and the Dianchi lake is divided into 3 subareas (north,middle and south) according to the concentration distribution of water quality indicators.Based on Jame’s concentrationvalue curve and the rate of pollution loss method,the water pollution economic loss in each subarea is calculated respectively from 4 water resource functions (drinking water,fishery,tourism,and irrigation).From the calculation,the total water pollution economic loss of the Dianchi lake is 7275 billion yuan in 2010,among which including 1552,3759,1964 bilion yuan in the north,middle and south subarea respectively.Form the rates of pollution loss in every subarea,the water resource function in the Dianchi lake has been lost in drinking water entirely,and the fishery partly (loss rate＞90%).Now the main water resource functions of the Dianchi lake are tourism and irrigation