以美国渔业及野生动物署提出的河道内流量增量法为理论基础,参照国内不同领域鱼类专家对中华鲟产卵栖息地的物理变量范围研究,分别用专家建议法和实测法绘制了葛洲坝下游中华鲟在不同生长阶段需求的栖息地各物理变量所对应的栖息地适宜度曲线,并根据二元法的分类格式对适宜度曲线上50%、75%、90%的水深和流速组合适宜度值的变量范围进行了求解.从而为河道内流量增量法中的物理栖息地模拟系统分析中华鲟在不同流量下的加权适宜栖息地面积提供了计算标准,同时为三峡大坝的生态调度提供了技术参考.“,”Based on the Instream Flow Incremental Methodology (IFIM), developed by the U. S Fish and Wildlife Service, this study plotted the Habitat Suitability Curve(HSC) using ecological data investigated by the domestic biological experts and extracted the depth and velocity suitable range from the HSC for where the 50, 75, 90 percentage of the composite Habitat Suitability Index (HIS) with binary format. This habitat curve will provide a criterion for calculating the weighted usable area (WUA) in different discharges in the Physical Habitat Simulation System (PHABSIM) in IFIM. This research could provide a consult for the ecological control and hydrological construction for Three Gorges Dam.