调节水位 meaning in Chinese

regulated level
regulated water stage
water stage， regulated

In the thirteenth year under the reign of the yongle emperor , after investigation and reconnaissance , chen xuan dug a 20 li - long river from the west of huai an city . the river channels off the water of guanjia lake into the huai rver . the river was named as qingjiangpu . along the river such four watergates as yifeng gate , qingjiang gate , fuxing gate and xingzhun gate were built to control the water level
永乐十三年，陈?通过实地走访查勘，淮安城西凿渠20里，导管家湖堤水至鸭陈口入淮，此河命名为清江浦，河上递建移风清江福兴新庄四闸，以便调节水位，此后，漕船可直入黄河，节省了大量费用。