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Position: Home > Articles > Effect of Groundwater Table on Cotton Irrigation Regulation Water Saving Irrigation 2015 (3) 15-17

地下水埋深对棉花灌溉制度的影响

作  者：
庄杨;卢健;缴锡云
单  位：
河海大学水利水电学院;河海大学水文水资源与水利工程科学国家重点实验室;水利部科技推广中心
关键词：
地下水位;棉花;灌溉制度;HYDRUS模型;黑龙港流域
摘  要：
针对黑龙港流域地下水位总体趋势持续下降的现象,结合沧州市南皮县棉田的原位试验,采用HYDRUS 1D模型进行数值模拟,分析不同地下水埋深条件下,地下水对棉花根系层的补给作用对灌溉制度的影响。结果表明,当全生育期地下水平均埋深为1.5、2m时,地下水对棉花根系层的补给量相当于实验棉田0.5~1.5倍的灌水定额。由此制定3种(1.5、2、3m)地下水埋深条件下不同降水水平年的棉田灌溉制度:播前灌之后,50%水平年不再灌溉;75%水平年当地下水平均埋深为3m时,灌一次花铃水;85%水平年在地下水平均埋深为2、3m时,各灌一次花铃水。地下水补给作用对棉花根系层土壤含水率存在着不可忽视的影响,特别是当地下水埋深不超过2m时制定棉田的灌溉制度应充分考虑地下水的补给作用。
译  名：
Effect of Groundwater Table on Cotton Irrigation Regulation
作  者：
ZHUANG Yang;LU Jian;JIAO Xi-yun;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University;College of Water Conservancy and Hydropower Engineering,Hohai University;Science and Technology Promotion Centre,Ministry of Water Resources;
关键词：
Groundwater table;;cotton;;irrigation scheme;;HYDRUS Model;;Heilonggang Basin
摘  要：
Aiming at the phenomenon of generally decline of groundwater level in Heilonggang Basin,combined with the in-situ test of cotton field in Nanpi county of Cangzhou city,the HYDRUS-1Dmodel is used to study the effect of the groundwater supply on the cotton irrigation scheme under the condition of different groundwater table.The result shows that:when the mean groundwater table during the whole growth period of cotton is 1.5mor 2m,the groundwater supply for the root layer is about 0.5~1.5times of the irrigation quota.Thus,the irrigation schemes for different typical precipitation years under the condition of three kinds of groundwater table(1.5,2,3m)is determined as following:for normal precipitation year(P=50%),irrigation is no longer needed after the irrigation before planting,for scanty precipitation year(P=75%),when the groundwater table is 3m,an irrigation in cotton florescence stage is needed;for extremely low precipitation year(P=85%),when the groundwater table is 2mor 3m,an irrigation in cotton florescence stage is needed for both cases.The effect of the groundwater supply on the soil moisture content of the Cotton root layer can not be ignored,especially,when the groundwater table is less than 2 m,determination of cotton irrigation scheme must take full account of the groundwater supply.

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