摘要
宝鸡峡灌区农业灌溉引用渭河水已对渭河生态造成了显著影响。渭河年径流量存在年际差异大的特点,而宝鸡峡渠首引水则多年维持在5.30亿m3/a左右,从而造成枯水年渭河生态基流的缺失及生态系统的破坏。宝鸡峡灌区引水对渭河径流量的影响主要集中在枯水年的枯水段(11月至翌年4月),引水后生态基流缺失量达1.42亿m3/a。通过改进宝鸡峡灌区灌溉方式和减少灌溉损失可以节水1.27亿m3/a,该水量能缓解宝鸡峡灌区引水对渭河径流量的影响。
Water diversion of Baojixia in＇igation area in Weihe River has notable effect on Weihe River. Annual runoff of Weihe River is rather big, wbile the water diversion amount of different level year is about 530 million m3. Then it had made the ecological basic flow of Weibe River insufficient and the ecosystem destroyed. The main effect periods of water diversion are in the low water period of low water year （ from Nov. to Apr. ） and the lack amount of ecological basic flow is 142 million m3 per year after water diversion. Through improving the irrigation mode of Baojixia irrigation area and reducing loss of irrigation channel, water saving amount each year can be 127 million m3 , which relieves the influence because of water di- version in Baojixia Irrigation Area.
出处
《人民黄河》
CAS
北大核心
2012年第12期106-108,共3页
Yellow River
基金
国家水体污染控制与治理科技重大专项(2009ZX07212-002-003-004)
关键词
灌溉引水
径流量
宝鸡峡灌区
渭河
water diversion for irrigation
runoff
Baojixia irrigation area
Weihe River
