During reservoir operation, the operation unit entrust a third party against the tunnel ditch reservoir and silting situation, set up some typical sections, using high precision GPS instrument measuring the position of pile Numbers, elevation, water level, etc., using advanced measuring instruments such as the RiverCAT measure the various section depth and the bottom elevation. Measurement data in this study are to carried on the summary analysis, draw the topographic map at the bottom of the reservoir, the general situation of the library at the end of tunnel ditch reservoir at the beginning of the water supply, and USES the method of cross section and running data difference method to check the volume of reservoir.%在水库运行期间,运行单位委托第三方针对水洞沟水库库容及泥沙淤积情况,设置了一些典型断面,利用高精度 GPS 仪器测量了桩号的位置、高程、水位等,利用RiverCAT等先进的测量仪器测量了各断面水深及库底高程.本研究对所测量数据进行了汇总分析,绘制了水库库底地形图,得到了水洞沟水库在供水初期的库底概况,并利用断面法和运行数据差值法校核了水库库容.
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