Modeling influence of reduced irrigation water on water balance using SWAP
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摘要: 以河套灌区永联试验区的六队六八斗渠控制区域为研究区域,采用荷兰Wageningen农业大学开发的SWAP(Soil Water Atmosphere Plant)模型,模拟分析了引水减少条件下的田间水均衡要素变化规律。结果显示蒸散发量占总耗水量的比例在90%以上,验证了河套灌区的耗水类型是以垂向的蒸散发为主。随着引水量减少,模拟的相对产量也显著降低。可见,当灌区年平均引水量从52亿m3减少到40亿m3时,现有种植结构下的作物产量将会受影响。因此,引水减少后的种植结构和灌溉制度需适度调整。Abstract: This paper analyzes the influence of reduced irrigation on water balance of farmland by the soil-water-atmosphere-plant(SWAP)Model.The experiment site is an area controlled by lateral canal in Hetao irrigation district of China.The results show that the ratio of evapotranspiration to total consumed water is over 90%,which further proves evapotranspiration is the leading water-consumed factor in Hetao irrigation district.The result also shows that relative production will fall evidently due to reduced irrigation water.Therefore,when the quantity of water alloted in Hetao irrigation district is cut down from 5.2 billion m3 to 4.0 billion m3,the pattern of crops and irrigation scheduling etc must be regulated newly.
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Keywords:
- SWAP model /
- reduced irrigation water /
- water balance
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[1] 樊军,王全九,邵明安.黄土高原水蚀风蚀交错区土壤剖面水分动态的数值模拟研究[J].水科学进展,2007,18(6):683-688.(FAN Jun,WANG Quan-jiu,SHAO Ming-an.Numerical modeling of the soil-water dynamics in water-wind erosion erisseross region on the loess platean[J].Advances in Water Science,2007,18(6):683-688.(in Chinese)) [2] van de SALM C,van DENIER der G H,WLEGGEBS R,et al.The effect of afforestation on water recharge and nitrogen leaching in the Netherlands[J].Forest Eenolngy and Management,2006,221:170-182. [3] SARWAR A,BASTLAANSSEN W G M,Feddes R A.Irrigation water distribution and long-term effects on crop and environment[J].Agrietilrural Water Management,2001,50:125-140. [4] van VOSSELEN A,VERPLANCKE H,van BANST E.Assessing water consumption of banana:traditional versus modelling approach[J].Agricultural Water Management,2005,(74):201-218. [5] van DAM J C,HUYGEN J,WESSELING J G,et al.Theory of SWAP version 2.0:Simulation of water flow,solute transport and plant growth in the Soil-Water-Atmosphere-Plant enviromnent[M].The Netherlands:Wageningen DID Winand Staring Centre,1997. [6] 杨树青.基于Visual-MODFLOW和SWAP耦合模型干旱区微咸水灌溉的水-土环境效应预测研究[D].呼和浩特:内蒙古农业大学,2005.(YANG Shu-qing.Study on water-soil environment response forecast in arid area under slight-salty irrigation based on coupled model of Visual-MODFLOW and SWAP[D].Huhhot:Neimenggu Agriculture University,2005.(in Chinese)) [7] 王修贵.涝渍兼治农田排水及水管理理论与技术研究[D].武汉:武汉大学,2003.(WANG Xiu-gui..Study on theory and technology of farmland drainage and water management under waterlogging[D].Wuhan:Wuhan University,2003.(in Chinese))
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