摘要
为探讨长江下游东流水道二期整治工程对河段内四大家鱼繁殖水流条件的影响,根据平面二维水流数学模型和四大家鱼适宜度曲线,建立了四大家鱼栖息地适宜度模型,并对东流水道不同时期的四大家鱼适宜度分布情况进行了数值模拟,初步评估了东流水道二期整治工程对四大家鱼适宜度的影响。结果表明:东流水道二期工程能增加四大家鱼产卵期理想的适宜性区域,有助于四大家鱼的产卵繁殖;对四大家鱼在生长期的影响因时期不同而有略有差异,在二期工程施工刚完成时不利于鱼群生长,但在施工完成较长一段时间后则有利于鱼群生长。建议在进行航道整治工程的整体布局和尺寸设计时考虑工程对目标鱼群栖息地适宜度的影响,使航道整治工程对目标鱼群栖息地适宜度的影响达到最小,甚至增加目标鱼群的理想适宜度和范围。
To explore the influence of stage II waterway regulation works of the Dongliu channel in lower Yangtze River on the spawning flow condition of Four Major Chinese Carps, based on the existing 2-D flow mathematical model and the habitat suitability index (HSI) of Four Major Chinese Carps, a HSI model of the carps is established, and the distribution of the carps HSI of the Dongliu channel in different periods is simulated and the influence of stage II waterway regulation works of the Dongliu channel on HSI of carps is preliminarily evaluated. The results show that stage II waterway regulation works of the Dongliu channel can increase the ideal area of Four Major Chinese Carps in spawning period, which is helpful for spawning and reproduction of the Carps;However, the influence in the growth period of Four Major Chinese Carps is slightly different due to the different periods,it is unfavorable to fish growth just after stage II waterway regulation works completion, but it will be beneficial to fish growth after a long period of stage II waterway regulation works completion. Therefore, the overall layout and scale design of the waterway regulation works should take full account of the impact of the project on HSI of the target fishes for producing the least impact on HSI of the target fishes, and even increasing HIS and area of the target fishes.
作者
蒋宁
蒋波
雷国平
JIANG Ning;JIANG Bo;LEI Guoping(College of Physics and Engineering,Chengdu Normal University,Chengdu 611130,China;National Engineering Research Center for Inland Waterway Regulation,Changjiang Waterway Planning Design and Research Institute,Wuhan 430011,China)
出处
《人民长江》
北大核心
2019年第5期5-9,14,共6页
Yangtze River
关键词
四大家鱼
栖息地
栖息地适宜度
航道整治工程
东流水道
Four Major Chinese Carps
habitat
habitat suitability index
waterway regulation project
Dongliu channel
