Chen Hong-gen, Lin Dan-dan, Zeng Xiao-jun, Hang Chun-qin, Ma Wei, Gu Xiao-nan, Li Zhao-jun, Chen Yi-yang
Jiangxi Provincial Institute of Parasitic Diseases, Nanchang 330046, China.
Department of Water Environment , China Institute of Water Resources and Hydropower Research, China.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2013 Aug;25(4):337-42, 356.
To investigate the impact of the Water Conservancy Project of Poyang Lake after operation on Oncomelania hupensis snail habitats in 10 counties (cities or districts) around Poyang Lake.
The data of the distribution, numbers, 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 respectively in the case that the project ran by different water regulation schemes at 14, 13, 12 m and 11 m levels.
In accordance with the regulation and storage preset programs at 14, 13, 12 and 11 m 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 water level, the numbers of completely submerged and partially submerged marshlands as well as the submerged areas were accounted 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.
The Water Conservancy Project of Poyang 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 elevation.
探讨鄱阳湖水利枢纽运行后对环鄱阳湖10个县（市、区）钉螺孳生地的影响。
调查收集鄱阳湖枢纽工程上游有螺洲滩的分布、数量、面积、高程和坡度等数据，据此分别分析计算工程按14米、13米、12米和11米不同水位调控方案运行情况下洲滩淹没及水淹情况。
按照14米、13米、12米和11米水位调控预设计划，鄱阳湖自下游至上游淹没洲滩数量及其面积依次递减。在14米水位调控情况下，完全淹没、部分淹没洲滩数量及淹没面积分别占整个洲滩的32.9%、51.4%和60.3%。在13米水位调控时，分别为9.8%、46.8%和1.9%。在11米水位时，仅4个洲滩部分被淹，占洲滩总数的0.5%，占洲滩总面积的0.2%。
鄱阳湖水利枢纽工程可能为水淹灭螺创造条件。如连续2至3年按14米水位调控，60.3%的有螺环境可实现灭螺目标。然而，从“洲滩水淹”角度看，如按11米或10米水位调控，对鄱阳湖地区钉螺孳生面积及钉螺分布影响不大。不同县的洲滩因位置和高程不同，受影响程度可能存在差异。
