1前言为了提高排沙比，长期保持有效库容，在右岸集中布置12个泄洪排沙底孔，用以排除库中部分泥沙．大水大沙年汛期采用12个底孔集中排沙，其它年份则用蓄洪运用的方式，即利用弃水排沙．闸门运用方式如表1所列．表1白石水库泄水调节闸门运用方式在5000年一遇校核洪水位为133 1 Preface In order to improve the sand discharge ratio, long-term maintenance of effective storage capacity, a total of 12 flood discharge sand bottom holes arranged on the right bank to exclude some sediment in the reservoir. In the flood season of Dasha, a total of 12 bottom holes are used to concentrate sediment discharge. In other years, the method of flood storage is used, that is, the use of waste water and sediment discharge. Gate using the way as listed in Table 1. Table 1 Shiraishi reservoir discharge gate adjustment method in 5000 once the flood water level of 133