摘要
水蚀风蚀交错区地下水资源计算与评价方法研究是一个薄弱环节。以宁夏中部干旱风沙区的长沙河流域为例 ,通过调查和观测该区现有井灌区地下水实际开采量 ,合理选择地下水计算参数 ,利用水均衡法 ,推算该地区地下水可开采量 ,并通过地下水位观测资料进行验证。结果表明 :处于腾格里沙漠东缘的水蚀风蚀交错区 ,地表风积沙的降雨入渗系数可达 0 .2 5 2 ,多年平均地下水最大可能开采量可达到降雨总量的 2 1.9% ,多年平均地下水可开采量可达到降雨量的 12 .2 1%。
The study on calculation and assessment of groundwater resources in water-wind erosion crisscross region has been the weak spot all along.By investigating and measuring groundwater yield of Changsha River watershed and using area water balance method and selecting ground water computation parameters rationally, the potential groundwater yield can be calculated and coincide with the measured data. It is found that the coefficient of rainfall infiltration is 0.252, and the percentage of the potential yield of normal annual groundwater resources out of total mean annual rainfall is 21.9%, and the percentage of probable yield out of total mean rainfall is 12.21% in the water-wind erosion crisscross region in the east edge of Tengger Desert.
出处
《水土保持研究》
CSCD
2004年第3期41-45,共5页
Research of Soil and Water Conservation
关键词
干旱风沙区
水蚀风蚀交错区
地下水资源
可开采量
arid aeolian sand region
water-wind erosion crisscross region
groundwater resources
probable yield