摘要
根据内蒙古河套灌区解放闸灌域2006-2013年水文、气象以及地下水资料,应用水量平衡对灌域实施节水后作物生育期内区域耗水、地下水贡献及水均衡变化进行了定量研究。研究结果表明2006-2013年作物生育期内灌域约有80%的地区地下水埋深呈增大趋势。在一定范围内,灌区水量输入(灌溉与降水之和)减少会明显使得灌域蒸散发减少。在实施节水灌溉的背景下,地下水对蒸散发的贡献率则呈一定幅度的上升趋势,8年平均地下水贡献率达到34%。灌区节水引起的地下水位下降及地下水对耗水贡献的改变将改变农业产出及灌区生态环境。
Based on the 8 years hydrological dataset ,meteorological data and groundwater data ,the evapotranspiration ,groundwater contribution to evapotranspiration and the water equilibrium change were quantitatively calculated by water balance equation in Jiefan‐gzha sub-district during the crop growth period .The results showed that about 80% areas in Jiefangzha sub-district the groundwater depth showed a trend of increase from 2006 to 2013 during the crop growth period .As the water input item ,the decrease of irriga‐tion and rainfall lead to the decrease of evapotranspiration within a certain range .Under the background of water saving irrigation , the groundwater contribution to evapotranspiration showed an uptrend ,and 8 years the mean rate of groundwater contribution to e‐vapotranspiration was 34% .The decline of groundwater depth and the change of the groundwater contribution to evapotranspiration would change the agricultural output and the environment of the irrigation district .
出处
《中国农村水利水电》
北大核心
2016年第9期141-144,共4页
China Rural Water and Hydropower
关键词
水量平衡
节水
地下水浅埋区
地下水贡献
water balance
water saving
shallow groundwater area
groundwater contribution
