[南水北调东线工程调水河流模拟运行高水位对钉螺自然生长的影响]

[Impact of simulation operation high water level on Oncomelania hupensis natural growth in water diversion rivers of east route of South-to-North water Diversion Project].

作者信息

Hang De-Rong, Tang Hong-Ping, Huang Yi-Xin, She Guang-Song, Zhang Jian-Feng, Huang Yong-Jun, Li Wei, Zhu Xi-Guang, Yang Kun

机构信息

Jiangsu Institute of Schistosomiasis, Wuxi 214064, China.

出版信息

Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2011 Dec;23(6):664-7.

PMID:22379822

Abstract

OBJECTIVE

To verify the impact of operation high water level on Oncomelania hupensis natural growth in the water diversion rivers of the east route of South-to-North Water Diversion Project.

METHODS

The data of the daily mean water level were investigated in the stilling pool of Jiangdu Pumping Station during the water diversion under the emergency anti-drought, and the water level data of the previous year served as the control. The dynamic of natural growth of O. hupensis snails was observed before and after the high water level in the beach wetlands of the stilling pool of Jiangdu Pumping Station. The water level of emergency anti-drought was as simulation operation water level of the east route of South-to-North Water Diversion Project in the stilling pool, and then the effects of operation water level on O. hupensis natural growth in the water diversion rivers of the east route of South-to-North Water Diversion Project were studied.

RESULTS

The altitude of the beach wetlands was 6.4 to 7.2 meters in the stilling pool of Jiangdu Pumping Station. The water diversion was 255 days continuously and the pumped water was 6.235 billion cubic meters in the Jiangdu Pumping Station from November 2010 to July 2011. There were 216, 136 days and 39 days when daily mean water level were more than or equal to 7.2, 7.6 and 8.0 meters during the water diversion, respectively. The snail densities were 0.856 snails/0.1m2 and 0.0153 snails/0.1m2, respectively, before and after the No.3 beach wetlands flooded in the stilling pool of Jiangdu Pumping Station. The densities of living snails decreased by 98.21%, and there was no any progeny of snail. The snails were not detected in other environment of the stilling pool.

CONCLUSION

The operation high water level can effectively restrain snail breeding in the water diversion rivers of the east route of South-to-North Water Diversion Project.

摘要

目的

验证南水北调东线工程调水河流运行高水位对钉螺自然生长的影响。

方法

调查江都抽水站静水池在应急抗旱调水期间的日平均水位数据，以上一年水位数据作为对照。观察江都抽水站静水池滩涂湿地高水位前后钉螺自然生长动态。将应急抗旱水位作为南水北调东线工程静水池模拟运行水位，研究运行水位对南水北调东线工程调水河流钉螺自然生长的影响。

结果

江都抽水站静水池滩涂湿地高程为6.4～7.2米。2010年11月至2011年7月，江都抽水站连续调水255天，抽水量62.35亿立方米。调水期间日平均水位≥7.2米、≥7.6米、≥8.0米的天数分别为216天、136天和39天。江都抽水站静水池3号滩涂湿地淹没前后钉螺密度分别为0.856只/0.1平方米和0.0153只/0.1平方米。活螺密度下降98.21%，且无任何螺的子代。静水池其他环境未检出钉螺。