Abstract: Sedimentation survey of Xiaoxia hydropower station has been carried out regularly since impoundment. According to the results of sedimentation survey, the characteristics of sedimentation and reservoir storage are analyzed, and the change of sedimentation and erosion are understood. Improvement measures are put forward to alleviate reservoir sedimentation, prolong reservoir service life, maximize reservoir function and benefit, and provide scientific basis for reservoir operation.

Key words: section sedimentation survey, underwater topographic survey, transverse sedimentation characteristic, longitudinal sedimentation characteristic, reservoir storage characteristic

摘要： 小峡水电站自水库蓄水运行以来，定期进行水库淤积测量。根据淤积测量成果，分析其淤积特性及库容特性，掌握水库冲淤变化情况，并提出改进措施，减缓水库淤积，延长水库使用寿命，最大限度发挥水库作用和效益，为水库调度运行提供科学依据。

关键词: 断面淤积测量, 水下地形测量, 横向淤积特性, 纵向淤积特性, 库容特性