科研之友
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摘要
Longjing Lake is a newly formed river-type reservoir. Its good water quality maintenance is a crucial point to ensure Chongqing Garden Expo Park as a high quality spot for eco-tourism and leisure scenery. At present, the upstream basin of Longjing Lake is still under construction and its main pollutants are nitrogen, phosphorus and total suspended solids (TSS). Thus, class IV standard was taken as the water quality target, the water environment capacity of Longjing Lake watershed was calculated, and pollution loading reduction was also estimated based on dividing of several control units. According to the above results, the overall layout and task measurements for water quality improvement for Longjing Lake and water pollution controlling scheme were proposed, which involved its upper reach basin pollution loading reduction of input tributaries, pollution control in the garden and water quality maintenance in the Lake. Moreover, Target accessibility analysis based on loading reduction indicates that the expected target for water quality maintenance of Longjing Lake will be fulfilled if the technical scheme could be carried out. The results would provide technical and planning support for water pollution control and water quality maintenance of aquatic systems in mountain city like Chongqing.
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