鄱阳湖低水位演变归因与生态水位调控研究

Water level is an important hydrological parameter of lake wetland. Recently, multiple factors have made contribution to the low water level in Poyang lake, which is believed to be the root cause for the deterioration of eco-environment. This research is focused on the evolutional attribution of low water level and its ecological regulation in Poyang lake. Main directions of this research are listed as follows: formation mechanism and attribution analysis of low water level of Poyang lake; establishment of water model for Poyang lake based on multiple information fusion; determination of the lowest ecological water level of Poyang lake; making decision on the regulation rules for the water inflow from the "five rivers" and the stream flow of Yangtze river in acent to the lake mouth to maintain the lowest ecological water level of Poyang lake. Compared with previous studies, in the attribution analysis study on low water level, more impact factors will be considered and the quantification analysis will be carried out, which make this study comprehensive and integrative. In the study on the lowest ecological water level, by constructing the mathematical water-level model, difficulty in calculation led by the separation and connectivity of the landform of lakes marsh wetland can be dealt with; and the decision on the regulation rules to maintain the lowest ecological water level. This study will make contribution to the ecological protection and regional resource sustainable development for lake wetland.

水位是湖泊湿地重要的水文要素之一。针对近年来多重因素造成鄱阳湖低水位呈常态化趋势，并由此引发生态环境恶化的问题，开展鄱阳湖低水位演变归因与生态水位调控研究。主要研究内容包括：鄱阳湖低水位演变及归因分析；基于多元信息融合的鄱阳湖数字水面模型的构建；鄱阳湖最低生态水位的确定，并从增加入湖水量和减少出湖水量两方面提出维持最低生态水位的“五河”来水与湖口附近长江干流流量的调控准则。与现有的研究成果相比，在低水位归因分析上，融入更多鄱阳湖水位的影响因子，并进行定量的分析，因此更具有综合性和集成性；在最低生态水位的研究中，通过构建在不同水位条件下的数字水面模型，解决湿地内湖沼地形由于既有连通性又有分隔性而难以计算的难题；以及在维持最低生态水位的调控准则的制定等方面具有特色。研究成果可为湖泊湿地的生态保护及区域资源可持续利用提供科学依据。

水位是湖泊湿地重要的水文要素之一。针对近年来多重因素造成鄱阳湖低水位呈常态化趋势，并由此引发生态环境恶化的问题，开展鄱阳湖低水位演变归因与生态水位调控研究。主要研究内容包括：鄱阳湖低水位演变及归因分析；基于多元信息融合的鄱阳湖数字水面模型的构建；鄱阳湖最低生态水位的确定，并从增加入湖水量和减少出湖水量两方面提出维持最低生态水位的“五河”来水与湖口附近长江干流流量的调控准则。与现有的研究成果相比，在低水位归因分析上，融入更多鄱阳湖水位的影响因子，并进行定量的分析，因此更具有综合性和集成性；在最低生态水位的研究中，通过构建在不同水位条件下的数字水面模型，解决湿地内湖沼地形.由于既有连通性又有分隔性而难以计算的难题；以及在维持最低生态水位的调控准则的制定等方面具有特色。研究成果可为湖泊湿地的生态保护及区域资源可持续利用提供科学依据。