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渭干河平原绿洲适宜规模
Authors
宋郁东
李修仓
+4 more
李岳坦
田长彦
胡顺军
陈小兵
Publication date
1 January 2006
Publisher
Abstract
荒漠和绿洲长期共存,绿洲系统的生存发展需要有较好的绿洲植被生态系统支撑.干旱区平原绿洲,应以水为中心确定绿洲规模,防止水资源不足情况下土地过度开发造成的荒漠化和沙漠化.良性循环的稳定绿洲必须具有合理的农林牧用地结构.开展绿洲适宜规模与发展空间研究,将为绿洲的有效建设提供理论和应用依据.本文通过水热、水土平衡分析,建立了适宜绿洲数学模型.根据渭干河平原绿洲多年的水文气象资料,依据水量平衡原理,计算了该绿洲可供蒸发蒸腾的水资源量、适宜的绿洲和耕地面积.结果表明,渭干河平原绿洲可供蒸发蒸腾的水资源量为22.32×108m3,在常规地面灌溉条件下适宜的绿洲面积为3716.06km2,其中适宜的耕地面积为1564.79km2;在节水灌溉条件下,适宜的绿洲面积5515.49km2,其中适宜的耕地面积为2322.31km2.世界银行贷款项目——渭干河流域农业灌溉排水工程结束后达到的绿洲面积为4123km2,农田耕地面积为1507km2,绿洲和耕地面积比较适宜,如果采取节水灌溉措施可适度扩大绿洲规模
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Last time updated on 29/11/2016