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| DOI： |
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| Appropriate Well-canal Irrigation Proportion in Irrigation District Based on MODFLOW and GIS |
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ZHANG Jiaxing, QI Xuebin, MAGZUM Nurolla, LI Ping， HUANG Zhongdong, HU Yanling
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Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; Agriculture Water and Soil Environmental Field Science Research Station of Xinxiang City, Henan Province, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
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| Abstract: |
| In order to rationally use surface water and groundwater resources, improve the ecological environment of irrigation area and provide the basis for the realization of the most stringent water management, taking People's Victory Canal irrigation district as the research area, ArcGIS was used to analyze the People's Victory Canal irrigation district groundwater utilization status, and MODFLOW model was used to establish a fully irrigated three dimensional flow numerical simulation model. Eight different programs were set up to simulate the water level of the programs running in five years, and analyze the trends in groundwater level. The results showed that irrigation district ground water level showed a downward trend, reducing groundwater extraction played a significant role in the groundwater level recovery. In flat water year, reducing 10% of the groundwater exploitation, the well-canal irrigation proportion was 1/0.78, of which upstream was 1/1.24, midstream was 1/0.85, the downstream was 1/0.41, and the change well number from the original 20 261 eyes to 14 315 eyes could make the dynamic groundwater balance. |
| Key words: groundwater depth; the well-canal irrigation proportion; wells layout; model; GIS |
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