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一、概况: 东张水库位于福建省福清县龙江中游。龙江流域面积530平方公里,坡陡流急,单独入海。水库下游十公里的福清城关附近为感潮河段。流域受西南季风和台风影响,雨量充沛。多年平均年降雨量为1614毫米,但年际和年内分配不均,变化极大。水库控制流域面积为200平方公里,多年平均迳流量为17890万立米(表一)。大坝为混凝土宽缝重力坝,最大坝高38米,总库容19900万立米。校核洪水位时最大下泄
I. Overview: The East Reservoir is located in Fuqing County, Fujian Province Longjiang middle reaches. Longjiang drainage area of 530 square kilometers, steep slope flow urgent, into the sea alone. 10 kilometers downstream of the reservoir near the Fuqing Chengguan tidal reach. Watershed affected by the southwest monsoon and typhoon, abundant rainfall. The average annual rainfall for many years is 1,614 millimeters, but it is unevenly distributed during the year and the year and varies greatly. The reservoir control basin covers an area of 200 square kilometers with a multi-year average flow of 178.9 million cubic meters (Table 1). The dam is a concrete wide-gap gravity dam with a maximum height of 38 meters and a total capacity of 199 million cubic meters. The maximum discharge when checking the flood level