描述：船在民勤干涸的水库库底上“停泊”。
Caption: Boats rest on the bottom of a dried reservoir in Minqin County.
目的为修订三峡水库库区库底卫生清理规范提供依据。
Objective To provide evidences for revising guideline for hygienic cleaning of the Three Gorges Reservoir.
某水库库底地基变形较大，蓄水初期曾引起库底沥青混凝土防渗护面开裂。
Large deformation was induced in soils of a certain reservoir bottom during the first water impounding, and resulted in cracks in the asphalt concrete impervious face.
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