A preliminary study on the calculation of the sediment increment from human activity in the pro ject of Three Gorges

Fang Zongdai

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A preliminary study on the calculation of the sediment increment from human activity in the pro ject of Three Gorges

- A preliminary study on the calculation of the sediment increment from human activity in the pro ject of Three Gorges
- Bulletin of Soiland Water Conservation Vol. 7, Issue 5, Pages: 47-51(1988)
- 作者机构：
  
  水利水电科学研究院泥沙研究所
- 作者简介：
- 基金信息：
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- Published：1988
- 稿件说明：
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Fang Zongdai. A preliminary study on the calculation of the sediment increment from human activity in the pro ject of Three Gorges[J]. Bulletin of Soiland Water Conservation, 1988, 7(5): 47-51.
DOI：

Fang Zongdai. A preliminary study on the calculation of the sediment increment from human activity in the pro ject of Three Gorges[J]. Bulletin of Soiland Water Conservation, 1988, 7(5): 47-51. DOI：

摘要

人类活动对水文泥沙的影响是很大的。长江上游地区

人口剧增

破坏频繁

恶化了丰枯比

大量的泥沙输入长江干流

加大江水浑浊度

延长浑浊时间

沿江的水文站竟检测不出来。八十年代宜昌站的泥沙量完全同五十年代初等量

5.2亿吨。由此得出了“30多年来

长江上游的沙量没有变化

往后也不会出现本质变化”的凝固结论。本文仅就人类活动影响三峡工程增沙值作点初探

得到目前宜昌站平均沙量为6.59亿吨

50年后则为6.85亿吨。

Abstract

The impact of human activity on hydrology and sediment is great. On the upper reaches of the Yangtze River great amount of sediment is transported into the mainstream

which increases turbidity of the river and lengthens the turbidness time because of the sharp increa sing of population

the frequent destruction and the deterioration of the ratio of abundance to dryness

but the variation has not been found in checking，so it is thought that the sediment load at Yichang station in 1980's is completely the same as that in 1950's

e.，520 million ton

and affir med that the sediment load on upper reaches of the Yangtze River has not been changing for thirty years or more and it would not change essenti ally in the future

In this paper a preliminary study is made to the effect of human activity on the increment of sediment load in the section of Three Gorges

The results obtained is that the annual average sediment load at Y ichang station is 659 million tons and would be 685 millon tons in fnture fifty years.

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