长江中下游“一江两湖”泥沙分布格局研究

发布时间：2018-01-25 00:18

本文关键词： “一江两湖” 泥沙分布格局多重人类活动泥沙补给长江中下游　出处：《人民长江》2017年11期 　论文类型：期刊论文

【摘要】：长江中下游"一江两湖"交织,形成我国最为庞大和复杂的江湖水网,是水资源最为丰富的地区,亦是长江经济带发展规划的重点区域。近60 a来,江湖系统内、外部人类活动频繁,规模大,致使泥沙来源、来量及分布格局显著变化,江湖关系相应调整。基于江湖系统不同控制区的泥沙通量计算,揭示了"一江两湖"泥沙分布格局调整的3个特征阶段:1956~1980年江平衡、湖沉积,1981~2002年江湖同沉积和2003~2015年江湖同补给。下荆江裁弯、水土保持工程、湖泊围垦和水利枢纽工程等多重人类活动以及极端的水文情势,对江湖泥沙分布格局阶段的调整影响明显。
[Abstract]:"one river and two lakes" intertwined in the middle and lower reaches of the Yangtze River, forming the largest and most complex river and lake water network in China. It is the most abundant area of water resources, and also the key area of the development planning of the Yangtze River economic belt in the past 60 years. In the river and lake system, the external human activities are frequent and the scale is large, resulting in significant changes in sediment source, quantity and distribution pattern, and the relationship between rivers and lakes is adjusted accordingly. Based on the calculation of sediment flux in different control areas of river and lake system. It is revealed that the sediment distribution pattern of "one river and two lakes" is adjusted in three characteristic stages: 1: 1956 ~ 1980, the river balance and lake deposition. From 1981 to 2002 and from 2003 to 2015, the rivers and lakes were recharged. The lower Jingjiang River bend, the soil and water conservation project. Many human activities, such as lake reclamation and water conservancy projects, as well as extreme hydrological conditions, have a significant effect on the adjustment of sediment distribution patterns in rivers and lakes.
【作者单位】：长江水利委员会水文局;
【基金】：国家重点研发计划项目(2016YFC0402301,2016YFC0402101,2016YFC0402304,2016YFC0402305)
【分类号】：TV14
【正文快照】： 长江中下游江湖系统由约1 130 km的干流河道、洞庭湖、鄱阳湖3个部分构成[1-2],区间多条支流入汇,交织成我国水网最密集、水资源最丰富的区域,是重要的粮、油、棉生产基地,亦是长江经济带发展规划的重点对象之一。近60 a来,受湖泊围垦、水土保持、水利枢纽、河道(航道)治理、

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