为探讨长江上游特有鱼类在赤水河栖息繁殖的可能性，评估赤水河作为金沙江下游干流替代生境的可行性与适宜性，将河流生境进行适当概化，建立赤水河与金沙江下游河段的生境相似性指标体系，应用模糊相似理论，提出基于恒定型相似元、时间型相似元和系统相似度的河流生境相似性计算方法。以赤水河与金沙江下游河段为研究对象，实例计算了两个河流生境的相似程度，结果表明赤水河与金沙江下游河段在水环境方面的相似度高达0.811，处于高度相似等级，河流地形地貌与水文方面的相似度分别为0.743和0.640，均处于基本相似等级。总体来说，赤水河与金沙江下游河段的河流生境相似程度较高，相似度达0.694，处于基本相似等级。%In order to assess the feasibility and suitability of Chishui River to be an alternative fish habitat of downstream reaches of Jinsha River , a similarity analysis was performed between these two rivers .Based on the generalized hierarchi-cal structure of river habitat , a similarity indicator system was established .A set of calculation methods of habitat similari-ty, including different types of similarity elements and system similarity degree , were presented .The calculated results of similarity degree showed that the water environment between these two rivers was in highly similar level ( value of similarity elements in water environment reached 0.811).The river morphology and hydrology were both in basically similar level (values of similarity elements in river morphology and hydrology were 0.743 and 0.640, respectively).On the whole, the habitat similarity between Chishui river and downstream reaches of Jinsha river was relatively high ( value of similarity degree was 0.694 ) and in basically similar level .
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