宁夏引黄灌区井渠双灌节水效果研究
Well-canal irrigation effects on water conservation in the Yellow River irrigation areas of Ningxia Region
-
摘要: 定量研究了宁夏引黄灌区地表水与地下水联合利用的节水效果。引黄灌区的大引大排是造成渠系输水损失、农田地下水位高和潜水蒸发严重的主要原因，在整个黄河流域用水十分紧张的现状下，以引黄灌区地下水可开采量为基础，根据现有的机井条件并有计划的布设发展一批机井，考虑开采一定数量的地下水用于农业灌溉，在灌区逐步实现基于井渠双灌的水资源高效利用。研究结果表明，随地下水利用量的增大，可有效的降低灌区地下水位0.5～1.0 m、使引黄灌区的总耗水量从39.64×108 m3降低到29.95×108 m3、渠首引用水量从81.71×108 m3降低到64.79×108 m3。Abstract: Analyzed quantificationally effects on water conservation of conjunctive use of surface and ground water in the Yellow River irrigation area of Ningxia. Due to large quantity of water withdrawn and discharged in the Yellow River irrigation area of Ningxia, water loss from canal systems, phreatic water evaporation are very severe, and ground water level of farmland is high. At present, water shortage is still severe in the whole Yellow River basin. Based on available ground water and existing wells in the Yellow River irrigation area, a set of wells are planed and built. It is of great significance to exploit a certain quantity of ground water and well-canal irrigation model to realize conjunctive use of surface and ground water. The results show that: with the increase of groundwater utilization, it can effectively lower ground water level (0.5～1.0 m), reduce the total water consumption from 39.64×108 m3 to 29.95×108 m3 and canal intake from 81.71×108 m3 to 64.79×108 m3.
-
计量
- 文章访问数: 770
- HTML全文浏览量: 0
- PDF下载量: 375
下载:
