Flood coincidence problems in Nen River and Songhua River
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Abstract:
Flood disaster is one of the major natural disasters in Songhua River Basin. In particular, the confluence of Nenjiang River and Songhua River( hereinafter referred as the two rivers) encounter often causes flood. The encounter phenomenon of two rivers flood is taken as the engineering background. Based on historical flood data of the two rivers, two methods of statistics and Copula function are respectively adopted to qualitatively analyze the flood peak encounter and flood process encounter of the two rivers, and quantitatively obtain the encounter risks of the two rivers indifferent time periods and flood combinations of different magnitudes, in o rder to make the Songhua River Basin, especially the two river junctions and its flood control safety in downstream areas provides a valuable reference. The results of the two methods are the same, and the conclusion is credible. Flood encounter can be avoided by upstream water regulation.
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