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一、前言 淮河是我国第一条全面系统治理的大河,来水来沙特性受人类活动影响发生了显著的变化,但有关从流域产沙到河道输沙演变的过程和规律,水——沙变化的发展趋势及影响,缺少全面系统的研究;许多基本情况很不清楚。这方面的工作,迫切需要加强。 淮河支流众多,主要支流大都在正阳关以上汇入。鲁台子水文站距洪泽湖河口294km,集水面积88630km~2,控制颍河入汇后的淮干来水来沙;蚌埠水文站距河口175km,集水面积121330km~2,占洪泽湖以上集水面积的76.7％,来水来沙分别占入湖水、沙的80％和92％。50年代,实施内外水分流后,在蚌埠以下至洪泽湖的淮河干
I. Introduction The Huaihe River is the first comprehensive river system in China. The characteristics of the water coming and going to the sand have been significantly affected by human activities. However, regarding the process and law of the sediment transport from sediment yield to river sediment, Changes in the development trend and impact, the lack of comprehensive and systematic research; many basic situation is not clear. There is an urgent need to strengthen this work. Many Huaihe tributaries, most of the major tributaries of positive Yang pass above. The Lutaizi hydrological station is 294km away from the estuary of Hongze Lake and has a water catchment area of 88630km ~ 2 to control the incoming water and sediment of the Huaihe River after the Ying River is put in. The Bengbu Hydrological Station is 175km away from the estuary and the catchment area is 121330km ~ 2, Above 76.7% of the catchment area, water and sand accounted for 80% and 92% respectively of the water and sand. 50 years, after the implementation of internal and external water flow, in Bengbu following to Hongze Lake Huaihe dry