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我们辽宁省有小(一)型及小(二)型水库九百五十座,如果以部颁标准 SDJ—12—78的洪水标准来衡量,就有五百八十多座列为险库。从一九七五年开始,年年安排投资进行处理,提高防洪标准。多年来这项工作投资大,见效慢。除此而外还因为防洪标准几经变化,使一些工程出现连续除险。这大多数情况是由于确定水库防洪标准时首先按库容划分等级,再由级别确定防洪标准,虽然标准中也谈及附加条件,但都属于无指标性条件。因此,只用
We have a total of 950 small (a) and small (b) reservoirs in Liaoning Province. If we use the standard of Ministry of Standards SDJ-12-78 as a flood measure, we have over 580 listed as a safe depository . From 1975 onwards, investment should be arranged annually to raise flood control standards. Over the years, this work has a large investment and has a slow response. In addition, because of flood control standards after several changes, so that some projects appear contingency. In most cases, this is because, in determining the flood control standards of a reservoir, it is necessary to first classify the levels according to the storage capacity and then determine the flood prevention standards by the levels. Although the standard also refers to the additional conditions, they are all non-indicative conditions. Therefore, only use