Abstract: Objective To investigate the impact of the Water Conservancy Project of Poyang Lake after operation on Oncome? lania hupensis snail habitats in 10 counties（cities or districts）around Poyang Lake. Methods The data of the distribution，num? bers，areas，elevation and slope，etc. of snail infested marshlands on upstream of the project site in Poyang Lake were investigated and collected. Accordingly，the status of the submerged and flooding areas of the marshlands were analyzed and calculated respec? tively in the case that the project ran by different water regulation schemes at 14，13，12 m and 11 m levels. Results In accor? dance with the regulation and storage preset programs at 14，13，12 and 11m water levels，the number and its areas of submerged marshlands，from downstream to upstream in Poyang Lake，in turn decreased. Under the condition of the regulation at the 14 m wa? ter level，the numbers of completely submerged and partially submerged marshlands as well as the submerged areas were account? ed for 32.9%，51.4% and 60.3% of the whole marshlands，respectively. At the 13 m water level regulation，they were 9.8%， 46.8% and 1.9％ respectively. At the 11 m level，only part of 4 marshlands were flooded，which were accounted for only 0.5% of the total number of marshlands and 0.2% of whole areas of the marshlands. Conclusions The Water Conservancy Project of Poy? ang Lake may create a condition for eliminating snails through water flooding. If implementing regulation at the 14 m level for two or three consecutive years，60.3% of snail habits could realize the snail?free objective. However，if implementing the 11 m or 10 m water level regulation，there will be little impact on areas of snail habitats and the snail distribution in the Poyang Lake region from the point of view of“marshlands flooding” . The impacts on marshlands in different counties might differ due to the location and ele? vation.

Key words: Schistosomiasis；Water Conservancy Project of Poyang Lake；Oncomelania hupensis snail habitat；Water flood? ing

摘要： 目的 目的 分析在鄱阳湖水利枢纽工程建议预设的调度水位及血防调蓄水位条件下， 工程运行对鄱阳湖区沿湖10个 县 （市、 区） 钉螺孳生草洲的水淹影响。方法 方法 调查收集鄱阳湖水利枢纽工程选址上游鄱阳湖全流域有螺草洲分布、 数量、 面积、 高程和坡度， 并据此分析和测算工程分别按14、 13、 12 m和11 m调度水位运行时鄱阳湖草洲淹没状态和受淹面积。 结果 结果 按14 、 13 、 12 m和11 m 4种调蓄水位预设， 随着调蓄水位降低， 鄱阳湖区从下游至上游淹没的草洲数量及草洲面积 依次减少。14 m调蓄条件下， 完全淹没、 部分淹没草洲数分别占全湖草洲数的32.9%和51.4%， 淹没的草洲面积占全湖草 洲面积的60.3％； 13 m调蓄时， 完全淹没、 部分淹没草洲数分别占全湖草洲数的9.8%和46.8%， 淹没的草洲面积占全湖草洲 面积的31.9％； 11 m调蓄时， 仅有4块草洲部分被淹， 水淹的草洲块数和草洲面积分别仅占全湖草洲的0.5%和0.2%。结 结 论 论 鄱阳湖水利枢纽工程可为水淹灭螺创造条件， 连续2～3年实施14 m的血防调蓄水位， 可使湖区60.3％的有螺洲滩逐 步实现无螺； 但按11 m或10 m水位调蓄， 仅从有螺洲滩淹没效应考量， 对目前鄱阳湖区钉螺孳生地及其分布几无影响； 沿 湖各县草洲因所处区位及高程不同， 所受影响有所不同。

关键词: 血吸虫病； 翻阳湖水利枢纽工程； 钉螺孳生地； 水淹