河套灌区解放闸灌域盐荒地积盐量分析  

Analysis of salt accumulation in wasteland of Jiefangzha irrigation field in Hetao Irrigation District

作　　者：李亮[1] 李美艳 王世锋[1] 王长生 李正中 

机构地区：[1]中国水利水电科学研究院牧区水利科学研究所,内蒙古呼和浩特010020 [2]内蒙古自治区水利水电勘测设计院,内蒙古呼和浩特010020 [3]内蒙古河套灌区解放闸灌域沙壕渠试验站,内蒙古杭锦后旗015400

出　　处：《排灌机械工程学报》2015年第5期434-441,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：水利部公益性行业科研专项项目(201201008);中国水科院科研专项项目(MK2013J05)

摘　　要：以解放闸灌域为背景对盐荒地水分和盐分的变化展开研究.在田间试验的基础上,通过遥感技术对TM数据解译统计盐荒地面积,利用HYDRUS-1D模型对盐荒地土壤盐分的积聚量与流失量进行了模拟和分析.结果表明,盐分在表层土壤中积聚,解放闸灌域总面积为2 156.47km2,盐荒地达到了总面积的16.32%.灌域盐荒地1 m深土壤层中,在作物生育期积聚盐量为1.03×107kg,在秋浇期流失盐量为9.60×106kg,占积盐量的93.01%;年度积盐量为7.20×105kg,占积盐量的6.99%.经检验,HYDRUS-1D模型对土壤水分和盐分在垂直方向运移的模拟具有较高精度,反映出盐分积聚和流失规律.盐荒地盐分的积聚与流失对灌区盐分具有重要调节作用,可为灌区水盐运移的研究提供科学依据.Jiefangzha irrigation ges in water and salt in the salt field in Hetao Irrigation District is wasteland of the field are studied. taken as the background, the ehan- Based on field experiments, the sah wasteland area is summarized through interpreting TM data acquired by remote sensing technology, then salt accumulation and loss in the soil of the wasteland are simulated and analyzed lty using HYDRUS - 1 D model. The results show that the salt wasteland has covered 16. 32% of the 2 156. 47 ktn2 total area of the field and salt is mainly accumulated in the soil surface layer. The salt accumulation in the salt wasteland is 1.03 × 10^7 kg in the lm deep soil layer during the whole growth period of crop. The loss of salt in autumn irrigation is 9. 60×10^6 kg, which aeeounts for 93.01% of the total salt accumulation. The annual salt accumulation is 7.20 × 10^5 kg, 6.99% of the total salt accumulation. Upon inspection, the HYDRUS - 1 D model can simulate the vertical migration of soil water and salt with high accuracy, representing the law of salt accumulation and loss. The accumulation and loss of salt in wasteland plays an important regulating role in salt in the soil of irrigation field. The results can provide a scientific basis for study on water and salt migration in an irrigation field.

关 键 词：解放闸灌域 积盐量 HYDRUS-1D模型 盐荒地 TM数据 

分 类 号：S277.9[农业科学—农业水土工程]