Regional Salinity Modeling for Conjunctive Water Use Planning in Kheri Command
Regional Salinity Modeling for Conjunctive Water Use Planning in Kheri Command
复制标题
Kheri 司令部联合用水规划的区域盐度建模
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
A. Keshari
中科院分区：
文献类型：
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作者：
M. Kaledhonkar;M. Kaledhonkar;A. Keshari;A. Keshari
一维水分和溶质运移UNSATCHEM模型的校准和验证与小麦和棉花作物的咸水利用实验。该模型进一步采用分布式数据的土壤，灌溉水供应，其质量从六个代表性的位置从Kheri命令的Bhakra灌溉系统的区域尺度盐度建模。小麦-棉花作物轮作是命令中的主要轮作，在长期模拟中考虑了这一点。应用CROPWAT模型计算了不同作物的蒸散量，应用RETC模型计算了不同作物的土壤持水参数。大气水和溶质边界条件被假定在顶部边界，而自由排水被认为是为较低的边界，因为在命令的地下水位是足够深。模拟的盐度和产量值与观测值进行比较，区域验证模型。在命令中的关键领域确定使用区域尺度的模拟结果，并应用灌溉水的可用性和根区盐度标准。可持续联合用水规划的指导方针是，尽管在现有水资源及其质量的普遍情况下使用盐水进行灌溉，Kheri指挥部仍能获得最佳农业生产。
A one-dimensional water and solute transport UNSATCHEM model is calibrated and validated with a saline water use experiment for wheat and cotton crops. The model is further employed for regional scale salinity modeling with distributed data on soil, irrigation water supply, and its quality from six representative locations from the Kheri command of the Bhakra irrigation system. The wheat-cotton crop rotation, the main rotation in the command, is considered during long-term simulations. The CROPWAT model is used to determine the evapotranspiration requirements of different wheat and cotton crops, while soil water retention parameters are estimated by the RETC model. Atmospheric water and solute boundary conditions are assumed at the top boundary, while free drainage is considered for the lower boundary, as the watertable in the command is sufficiently deep. Simulated salinity and yield values are compared with observed values for regional validation of the model. Critical areas in the command are identified using regional scale modeling results, and applying irrigation water availability and root zone salinity criteria. Guidelines for sustainable conjunctive water use planning are for the Kheri command to get optimum agricultural production despite the use of saline water for irrigation under prevailing scenarios of water availability and its quality.