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
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.
YANG Yang-,ZHU Yan-*,WU Jing-Wei- et al. Numerical modeling and water balance analysis of groundwater under conjunctive use of groundwater and surface water in Hetao Irrigation District[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(8): 732-737.
LI Jiancheng, WEI Xiaomei, DENG Kangjie. Reasonable canal-to-well irrigation water quantity ratio in irrigation district based on groundwater balance[J]. Journal of drainage and irrigation machinery engineering, 2015,33(3):260-266.(in Chinese)
ZHOU Weibo. Application of artificial neural networks to groundwater level forecast for irrigation district with well and canal[J]. Northwest water resources & water engineering, 2003,14(2):5-9.(in Chinese)
XU Xu, HUANG Guanhua, QU Zhongyi, et al. Asses-sing the groundwater dynamics and impacts of water sa-ving in the Hetao irrigation district, Yellow River basin[J]. Agricultural water management, 2010,98(2):301-313.
HE Bin, LAI Bin, MAO Wei, et al. A distribution-determination method of conjunction use district with groundwater and surface water for Hetao irrigation district based on GIS[J]. Journal of irrigation an drainage, 2016,35(2):7-12.(in Chinese)
WANG Luyao, PENG Peiyi, HAO Peijing, et al. Well-canal conjunctive irrigation mode and potential of water-saving amount based on the balance of exploitation and supplement for Hetao irrigation district[J]. China rural water and hydropower, 2016(8):18-24.(in Chinese)