Numerical modeling and water balance analysis of groundwater under conjunctive use of groundwater and surface water in Hetao Irrigation District
YANG Yang1, ZHU Yan1*, WU Jingwei1, YU Leshi2, YANG Jinzhong1
1.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China; 2.Youxi County Government of Sanming, Fujian Province, Sanming, Fujian 365100, China
Abstract：A three-dimensional groundwater model of Hetao Irrigation District was established. Model parameters were calibrated and validated with datasets from 2006 to 2013. Then, the numerical model was applied to estimate the impacts of conjunctive use of groundwater and surface water under 9 water saving scenarios with 3 different irrigation quotas and 3 autumn irrigation frequencies. The simulating results indicate that the water table depth is 1.863-2.029 m in the whole district, which increases by 0.084-0.250 m compared with that before the conjunctive use of groundwater and surface water. The value of groundwater decline varies considerably in different conjunctive areas. The deepest water table depth is in Jiefangzha conjunctive area, which is 2.308-2.803 m. And the shallowest is 2.079-2.455 m in Yongji conjunctive area. The amouns of recharge and phreatic water evaporation decreases by 2.01×108-3.63×108 m3/a and 1.69×108-3.03×108 m3/a respectively.
杨洋, 朱焱*, 伍靖伟, 余乐时, 杨金忠. 河套灌区井渠结合地下水数值模拟及均衡分析[J]. 排灌机械工程学报, 2018, 36(8): 732-737.
YANG Yang, ZHU Yan*, WU Jingwei, YU Leshi, YANG Jinzhong. Numerical modeling and water balance analysis of groundwater under conjunctive use of groundwater and surface water in Hetao Irrigation District. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(8): 732-737.
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