指标动态权重对湖泊水生态系统健康评价影响研究

利用2014年和2018年鄱阳湖丰〖CD*2〗涨〖CD*2〗枯〖CD*2〗退4个水文时期的监测数据，引入可拓评价法对鄱阳湖水生态系统健康进行评价并探讨指标动态权重的影响。结果表明：鄱阳湖水生态系统健康状态不同水文时期差异显著，退水期最优，枯水期最差，涨水期稍优于丰水期。鄱阳湖水生态系统健康评价指标权重具有动态变化特征，指标权重值会随着指标具体取值的不同而发生变化，即便指标值相同，各指标间关系不同，指标权重也不同，从而影响鄱阳湖水生态系统健康的评价结果。鄱阳湖不同时期生态系统功能和结构差异较大，采用动态的权重对其水生态系统健康评价相对更加合理。

Research on the Influence of Index Dynamic Weight on Lake Aquatic Ecosystem Health Assessment

Based on the monitoring data of Poyang Lake in four hydrological periods, wet, rising, dry and retreating in 2014 and 2018, the extension evaluation method was introduced to evaluate the health of Poyang Lake aquatic ecosystem and analyze the influence of index dynamic weight. The results showed that the health status of Poyang Lake aquatic ecosystem varied significantly in different hydrological periods, with the best in retreating period, the worst in dry period, and a slightly better in rising period than in wet period. The index weight of Poyang Lake aquatic ecosystem health assessment had dynamic characteristics. The index weight value varied with the specific value of the index. Even if the index value was the same, the relationship between indicators were different, and the index weight was different, which affected the evaluation result of Poyang Lake aquatic ecosystem health. The ecosystem function and structure of Poyang Lake differed greatly in different periods. It was more reasonable to use dynamic weight to evaluate the aquatic ecosystem health.