amplitude of stage meaning in English

水位变幅

The main work is done with the help of model experiment . in the flood - relief experiment , the flood carrying capacity of spillway tunnel is checked . in the hydraulic experiment of the diversion power conduit system , the followings are studied : the flow condition and fluctuation in the surge chamber , the distribution of flow velocity before the rack in the surge shaft , the amplitude of stage in the quick gate bay etc . the test step , content and results of different proposals are introduced in details
本项优化试验研究的目的主要在于，通过泄洪系统整体水力学试验，校核泄洪洞的泄流能力；通过发电引水系统整体水力学试验，研究调压井内水流流态和水位波动情况、调压井内拦污栅前流速分布情况；确定快速闸门井内水位波动幅度；试验确定压力管道水击压力穿井系数以及泄洪洞弧形门处的水压力。