洞庭湖水生态风险防控技术体系研究

Study on the water ecological risk prevention and control technology system of dongting lake

为保障洞庭湖水生态系统健康安全,急需回答洞庭湖水生态风险和富营养化演变与流域人类活动及不同水文节律驱动间的响应机制这一科学问题,解决确定洞庭湖适宜生态水位和防治富营养化两个技术难点.本研究拟运用数理统计法、遥感定量反演和定量解译法及层次分析法等方法,确定洞庭湖水生态风险的内涵,提出洞庭湖水生态风险防控技术路线,开展水情驱动条件下洞庭湖生态效应定量评估技术集成与适宜生态水位、水环境演变与藻类水华风险控制技术集成、水生态风险及其防控集成技术构建和水体富营养化防治技术集成与示范等四个方面的研究,建立洞庭湖水生态风险防控技术体系,支撑洞庭湖流域可持续发展.

In order to ensure the health and safety of Dongting lake water ecosystem,we must firstly reveal the evolution process and response mechanism of water ecological and eutrophication risk of Dongting lake under the influence of high-intensity human activities and different hydrological rhythm.And then solve two technical difficulties including establishment of the suitable ecological water level and the eutrophication prevention technology of Dongting lake.This study intends to use mathematical statistics,remote sensing quantitative inversion and quantitative interpretation method and analytic hierarchy process method,to determine the connotation of Dongting lake water ecological risk and to establish the roadmap of Dongting lake water ecological risk prevention and control technology.Specifically,four aspects of researches are performed:the integrated technology of ecological effect quantitative assessments and suitableecological water level under the condition of water drive;the integrated technology of water environment evolution and algae blooms risk control;the integrated technology and demonstration including prevention and control water ecological risk and eutrophication risk.Finally,a rather perfect system of Dongting lake water ecological risk prevention and control technology should be established in order to support the sustainable development of Dongting lake basin.