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中文摘要：
本文基于三维水动力数学模型和中华鲟产卵场适合度评估方法,对葛洲坝坝下中华鲟产卵场的产卵适合度与大坝泄流关键指标（大坝出库流量和泄流方式）的定量关系进行评估。分析表明,适宜中华鲟自然繁殖的最佳出库流量范围约为15000～25000 m3/s;有利于中华鲟自然繁殖的最佳大坝泄流方式为先大江电厂发电泄流,后二江泄水闸弃水泄流,最后二江电厂发电泄流;小流量下最佳的机组泄流方式为大江电厂靠右岸机组发电泄流。研究结论给出了中华鲟产卵场保护的关键指标及其控制范围,为依托三峡-葛洲坝梯级水库开展中华鲟可持续性管理提供了基本理论依据。
英文摘要：
For the Yangtze reach downstream to Gezhouba dam, this paper assesses the quantitative relationship between the suitability of spawning ground and the key indicators of dam discharge, using a 3D hydrodynamic model and the assessment method for the Chinese sturgeon. This analysis shows that the most suitable flow for the sturgeon spawning in this reach is in a range of 15000 - 25000m3/s, and that there exists a certain mode of dam flow release that is the best for the sturgeon＇s natural reproduction ： Dajiang power plant discharging first, Erjiang sluice second, and Erjiang power plant last. In the case of low discharge, the best mode is to operate Dajiang power-plant units near the the right bank. These results prbvide a basis for protection of sturgeon spawning and scheduling of the Three Gorges-Gezhouba cascade reservoir operation.
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