Seite - 343 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 6 Longitudinal Section of Sedimentation over the Years for Main Stream of the Manwan Reservoir (2) The Inflow Flow and Sediment Considering the impounding and power generation of the Xiaowan HPP since 2009, the Xiaowan HPP has a large sediment ratio, with over year regulating ability; According to the calculation, the sediment retaining ratio of the Xiaowan HPP is up to 95%, and all the outflow sediments are fine wash-load sediments, which is quite hard to be deposited in the Manwan Reservoir area, therefore the inflow sediment volume in the sedimentation calculation is calculated only by applying the sediment volume between the area from the Xiaowan to Manwan areas; Affected by the regulation and storage of the Xiaowan HPP, the inflow water is not natural flow, and the inflow discharge shall be applied with the yearly and monthly inflow discharge of the Manwan dam site after regulation and storage. (3) Water Level in Front of the Dam Monthly average water level over the years after runoff regulation (4) Calculated Parameters Applied Calibration Results 4.3.2 CALCULATED RESULTS See Fig. 7 for the longitudinal section of sedimentation, and see Table 5 for reservoir capacity loss. 343