Abstract: The multi-level intake of hydropower station has been a hot issue in research and construction. Stoplog gate is usually adopted at the inlet of the multi-level intake. Researches in China and abroad on the inlet are reviewed in this paper, and the orientations of future research are proposed ①since the stoplog gate remarkably increases head loss at the inlet segment by 1-2m, the configuration and shape of stoplog gate which could help reduce the head loss should be paid attention to; ②stratified water temperature in the reservoir has big influence on the water viscosity, so numerical model which includes the water viscosity variable should be developed to improve the reliability and accuracy of flow field and flow velocity simulation at the inlet and discharged water temperature prediction; ③in addition, with the continuous construction and operation of big hydropower stations with multi-level intake, more prototype observation should be carried out.

Key words: water inlet of hydropower station, multi-level water intake, stoplog gate, waterhead loss, vortex, water temperature, viscosity