Nutrient Management in the Lake Tai Basin, China--Application of Source Water Quantity and Quality Model to Dongshan Peninsula
Lake Tai is the third largest freshwater lake in China,bordering Jiangsu and Zhejiang provinces,providing water to 3.0 × 107 residents.A severe algal bloom in2007 led to the development of the Lake Tai Master Plan,launched by the National Development and Reform Commission (NDRC),to improve nutrient management in the basin.Under a joint Australian China Environmental Development Project,the Australian eWater Source Integrated Modelling System (IMS) was applied to model water quantity and quality for a pilot area on the Dongshan Peninsula in the Lake Tai Basin.Source is a powerful modelling platform for environmental management which can integrate many physical processes and human impacts,successfully applied in over70 basins across Australia.The aims of the project were to: apply the model to a small pilot area and investigate strategies to improve nutrient (total nitrogen (TN) and total phosphorus(TP)) management in the Lake Tai Basin.Source was applied to the 77 km2 Dongshan Peninsula.The model consisted of 50 subcatchments with seven major landuse categories including aquaculture (43% of the area),upland and lowland fruit trees(31%),low and high density urban (12%) and vegetables (6%).The daily timestep model was run for the period 2001 to 2010.The flexible nature of the Source software enabled a number of novel modelling approaches to be applied such as simulation of the seasonal variability in runoff and nutrient export from the 33 km2 of aquaculture ponds on the Peninsula.The model was parameterised and validated drawing on local knowledge,expert opinion from the Chinese and Australian technical working group and literature from both countries.Three scenarios were investigated.The implementation of a proposed wetland to filter runoff from the aquaculture ponds could reduce TN and TP exports to the lake by 13% and 16% respectively.Other scenarios included the closure of the sewage treatment plant,and the adoption of improved fertilizer management practices in the vegetable and tree cropping areas.The project has provided valuable insights into the dominant nutrient sources exported to Lake Tai,potential nutrient reduction strategies and priorities for future research and data collection.
water quality catchment modelling source
D.K.Waters Jiao F Chen M D Yang J D Pape S Zhang HJ Li J Nash D
eWater CRC, University of Canberra, Australia Nanjing Institute of Geography and Limnology Science, Nanjing, 210000, China Academy of Environmental Science, Suzhou Environment Institute, Suzhou, 215000, China Earth Systems, Melbourne, Australia and Shanghai, 200000, China Taihu Basin Authority, Shanghai, 200000, China Department of Primary Industries, Victoria, Australia
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
423-431
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）