我县城关公社从1958年冬开始在白沙河的上游修建河道水库一座,把河槽明流和潜流同时拦截起来,引水流量加大一倍以上。白沙河的河床宽200—300米,坡度约1/500—1/1,000,沙层一般厚5—7米,一般季节明流水达0.7个流量,潜流水达1个流量。从1959年10月起动员2,100个劳动力在白沙河上游修建一座容量达60万方的河槽水库,既蓄集河里的明流水,又截引河槽的潜流,引水灌溉, Chengguan commune from the winter of 1958 in the upper reaches of the Baisha River reservoir to build a river, the river channel Mingcha and sub-flow interception at the same time, diversion flow more than doubled. Baisha River bed width of 200-300 meters, the slope of about 1 / 500-1 / 1,000, generally 5-7 meters thick sand, the general season of clear water up to 0.7 flow, sub-flow of water up to 1 flow. Beginning in October 1959, 2,100 laborers mobilized to build a 600,000-square-foot fluvial reservoir in the upper reaches of Baisha River, which not only collects the open water and the submarine fluvial channels in the river,