自然资源学报

自然资源学报 ›› 1999, Vol. 14 ›› Issue (2): 109-116.doi: 10.11849/zrzyxb.1999.02.003

• 论文 • 上一篇    下一篇

中国西北干旱区水资源利用及其生态环境问题

王根绪, 程国栋, 徐中民   

  1. 中国科学院兰州冰川冻土研究所, 兰州 730000
  • 收稿日期:1998-06-08 修回日期:1998-10-12 出版日期:1999-06-25 发布日期:1999-06-25
  • 作者简介:王根绪,男,生于1965年11月,博士,讲师,现主要研究方向为干旱区水资源与环境。
  • 基金资助:

    国家“九五”重点攻关课题

THE UTILIZATION OF WATER RESOURCE AND ITS INFLUENCE ON ECO ENVIRONMENT IN THE NORTHWEST ARID AREA OF CHINA

WANG Gen xu, CHENG Guo dong, XU Zhong min   

  1. Lanzhou Institute of Glaciology and Geocryology, CAS, Lanzhou 730000
  • Received:1998-06-08 Revised:1998-10-12 Online:1999-06-25 Published:1999-06-25

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303 | 88

摘要： 近５０年来,西北干旱区随水土资源开发利用规模的不断扩展,使区域内工农业与经济得以稳定持续发展。但同时,引起一系列生态环境变化。①大多数河流下游水量锐减,甚至断流,河道缩短,终端湖泊萎缩或干涸,水质咸化和污染趋势加剧；②土壤沙漠化和盐碱化,沙漠化土地面积达６７４９３×１０４ｈｍ２,盐碱化耕地面积逾１３５５６×１０４ｈｍ２；③植被退化,生物多样性减少,与５０年代初相比,天然森林面积减少４９％～５８％,草地面积减少１６％～９２％；④沙尘暴灾害发生频数增加,灾害程度加剧。节约与高效化利用水资源以及生态环境效益与经济效益间统一协调是西北干旱区可持续发展的根本途径

关键词: 西北干旱区, 水资源, 生态环境, 效应

Abstract: The northwest arid area of China,having about 1/4 of the total area o f China,is located near the center of the Eurasian continent.There are many mounta ins with elevations of 4300-7000m,which scatter between plains feeding 676 inla nd rivers.In the late 50 years,the exploitation and utilization of water resourc es in those rivers have led to the formation of 390 07×104 ha of man made oas es that scattered all over the river basins,and built of about 622 reservoirs wi th a storage capacity of 65 5×108m3 The large scale utilization of water reso urces has not only facilitated the steady development of agricultural economy bu t also resulted in very serious impacts on eco environment in the arid area: (a) The runoff courses of most rivers were shorten ed and the terminal lakes were reduced or dried up.The water quality in the lower reach esbecame worsened.(b)Soil salinization and desertification became more and more s erious in these regions.The salinized area totalled about 210 18×104ha,and des ertified area about 674 93×104ha.(c)Vegetation has been seriously degraded or destroyed.The natural vegetated area was reduced by 49%-58%,grassland reduced by 16%-92% and degraded grassland area occupied about 52%.

Key words: northwest arid area, water resources, eco environment, influence

中图分类号: 

  • P343.9