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通过分析,发现珠江流域洪水的产生有一定的规律,一般是北部河流的洪水大于南部,东部河流的洪水大于西部;洪水出现的时间,一般亦是东部河流的洪水早于西部,北部河流的洪水早于南部。洪水大小的次序与发生早迟的次序基本相同,各河流同时发生大洪水的机迂少,有利于防洪。还发现西江高要的洪水主要由黔江形成,其次为来自桂江及西江的区间,由郁江形成的机迂较少;相关分析结果说明北江流域相邻年份的洪水有很好的负相关关系,亦即北江的较大洪水与较小洪水基本上是隔年相间出现。相关分析结果还说明珠江流域洪水具有很好的峰量关系。本文对珠江流域洪水规律的分析成果有助于水利规划设计施工管理工作,可以节约水利水电工程投资,扩大工程效益。
Through the analysis, it is found that the flood in the Pearl River Basin has some regularities. Generally, floods in the northern rivers are greater than those in the south and floods in the eastern rivers are greater than those in the west. Floods usually occur in the eastern rivers earlier than in the western and northern rivers Early in the south. The order of the floods is basically the same as the order of occurrence of the floods, and the frequent floods in all rivers mean that they are less flood-prone. It is also found that the high floods in the Xijiang River are mainly formed by Qianjiang River, followed by the intervals from Guijiang River and Xijiang River, and less by the Yu River. The correlation analysis shows that there is a good negative correlation between floods in the adjacent years in the Beijiang River Basin, In other words, the larger and smaller floods in the Beijiang River occur basically every other year. The correlation analysis also shows that the flood in the Pearl River Basin has a good peak-volume relationship. The results of the analysis of the flood regulation in the Pearl River Basin are helpful to the management of water conservancy planning, design and construction, saving investment in water conservancy and hydropower projects and expanding project benefits.