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我省陕北(榆林、延安两地区)共有水库441座,占全省水库总数的31％,其中总库容在百万立方米以上的125座,占全省40％,大中型水库35座,占全省54％。 (一)陕北水库的特点陕北的水库有以下五个特点: 1.从水库效益上看,拦泥效益显著,灌溉效益不大。陕北的小(一)型以上的125座水库,截止1986年底共拦泥5.76亿立方米,占全省58％,如果以黄河下游清淤每立方米泥沙1.5元计,其拦泥效益达8.64亿元。靖边县有16座中型水库,45座小(一)型水库、80座小
There are totally 441 reservoirs in northern Shaanxi (Yulin and Yan’an), accounting for 31% of the total number of reservoirs in the province, of which 125 have a total storage capacity of over 1 million cubic meters, accounting for 40% of the province and 35 medium- and large-sized reservoirs, Accounting for 54% of the province. (A) Characteristics of North Shaanxi Reservoir Reservoir in northern Shaanxi has the following five characteristics: 1. From the reservoir point of view, the effect of significant sludge, irrigation benefit. As of the end of 1986, a total of 576 million cubic meters of mud were blocked in the reservoirs of small (a) type in northern Shaanxi, accounting for 58% of the province. If the sediment yield per cubic meter of sediment is estimated to be about 0.5% by dredging the lower Yellow River, Reaching 864 million yuan. Jingbian County has 16 medium-sized reservoirs, 45 small (a) reservoirs, 80 small