摘要
针对关中地区9大灌区,分析计算了在极端气候条件下农业节水潜力.结果表明:在95%年降水频率下,9大灌区的总节水潜力平均为1 640万m3.其中效益型节水潜力所占比例超过50%.夏玉米、果树和棉花对效益型节水潜力的贡献最大,而3种作物单位面积节水潜力在各灌区之间相差不大,平均值分别为94、63和43m3.hm-2.该研究结果可为关中地区各灌区提高水资源利用效率提供参考.
Agricultural water-saving potential for nine biggest irrigation districts in Guanzhong region was estimated and analyzed under extreme climate conditions.Data showed that the average water-saving potential of the nine irrigation districts was 16.40 million cubic meters,and the efficiency of water-saving potential was over 50% but under 95% of annual precipitation frequency.Maize,fruit trees and cotton made the greatest contribution to the efficiency of water-saving potential,while the water-saving potential of three crops per unit acre showed little difference among different irrigation areas,the average values are 94,63 and 43 m3·hm-2 respectively.These data provide a reference for the development of irrigation water saving technologies in the irrigation districts and for the improvement of water use efficiency.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第5期577-581,共5页
Journal of Beijing Normal University(Natural Science)
基金
国家水体污染控制与治理科技重大专项渭河水专项农业专题资助项目(2009ZX0712-002-003-002)
关键词
农业节水
潜力
极端气候
关中灌区
agricultural water-saving
potential
extreme climate
Guanzhong irrigation districts
