Abstract:Based on data of interpreting TM orthophoto images and water quality monitoring in July 2008, the correlativity of landuse, which was categorized to urban,agriculture, forest and grassland by National Standard for Landuse Category in China, and water quality was analyzed in terms of the whole watershed and sub-watersheds. In whole watershed of Dianchi lake, the urban landuse proportion illustrated positive relations with the water pollution stand(indicating with concentration of CODMn, TP, TN and NH3-N in water), while the other three types of landuse, agriculture, forest and grass, showed negative relations. The urban landuse was the major contributor to pollutants in the watershed, which submerged the contribution of cultivated land. Furthermore, classified 21 sub-watersheds to be 3 types, urban, agriculture and forest –watershed according to different proportions of landuse in the each sub-watershed. There were constant positive relationships between the urban-watersheds and water pollution,while negative relationships were observed for the forest-watershed. Also, the impact of landscape spatial pattern on water quality was discussed. The proportion and pattern of landuse both exerted great effects on the water quality at the scales of the whole watershed and the sub-watershed.
孙金华, 曹晓峰, 黄艺. 滇池流域土地利用对入湖河流水质的影响[J]. 中国环境科学, 2011, 31(12): 2052-2057.
SUN Jin-Hua, CAO Xiao-Feng, HUANG Yi. Effect of land use on inflow rivers water quality in lake Dianchi watershed. . CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(12): 2052-2057.