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水库兴建后就起到拦蓄洪水、调节流量的作用。洪水经过水库,其中一部分被拦蓄在库中,另一部分经水库的泻洪建筑物泻入下游。因此,入库的洪水过程线,经水库调、泻后就发生变形:洪峰流量被削减,洪水的退落也因水库拦蓄的洪水逐渐泻放而延缓,如图(一)的Q～t,q～t曲线所示。洪水经过水库调泻后的出流过程线q～t如何求得,截至目前为止,工程上应用的较多的有试算法,程学敏的图解法,M、B波塔波夫的图解法等,本文将介绍另一种图解法,这是作者在工作中摸索到的一种图解法。
After the reservoir has been built to play the flood control, regulating the role of traffic. Floods pass through reservoirs, some of which are trapped in reservoirs and the other part of which flows through the reservoirs to the downstream. Therefore, the process of flood storage, the reservoir transfer, after the deforming deformation: flood peak flow is reduced, the flood is also due to the withdrawal of reservoirs gradually delaying flood delaying, as shown in Figure (a) of Q ~ t, q ~ t curve shown. After the flood transfer reservoir pouring process flow line q ~ t how to get, so far, the engineering application of more trial algorithm, Cheng Xuemin diagram method, M, B Portafer’s diagram, etc., This article will introduce another graphical method, which is a graphic method that the author explored in his work.