一、引言义江河位于洛清江的上游,集雨面积931.6平方公里,主河道长度85.1公里,流域内10平方公里以上的小河流有17条。解放后兴建大小引水工程共计161处,其中较大的引水工程有东长岭、五合、鹅塘岭、城联、古岭、中江、古落、蓬来、祖庙、龙江、古赖、浔江等12处。坝型基本上属于折线型和克—奥型两类实用堰。平均坝高2.5米,最大坝高7.3米。溢流坝的建筑材料为水泥沙浆砌块石及混凝土护石,基础多为沙卵石复盖层。泄水建筑物下游的消能主要是采用底流消能和面流消能两种 I. INTRODUCTION The Yijiang River is located in the upper reaches of the Luochengjiang River with a catchment area of ​​931.6 square kilometers and a main river course of 85.1 kilometers in length. There are 17 small rivers in the drainage basin of over 10 square kilometers. After the liberation of the construction of the size of diversion project a total of 161, of which the larger water diversion projects Dongchangling, Wuhe, Eton Tangling, Citylink, Gu Ling, River, ancient fall, Penglai, Ancestral Temple, Longjiang, , Qijiang 12. Dam basically belongs to the line type and grams - Austrian two types of practical weir. The average dam height of 2.5 meters, the maximum dam height of 7.3 meters. Spillway dam building materials for cement mortar masonry and concrete stone, mostly based on sand and gravel overlay. Discharge downstream of building energy dissipation is mainly the use of undercurrent energy dissipation and surface current energy dissipation two