基于遥感蒸散模型的灌区节水潜力研究  

Study on Water Saving Potential of Irrigated Area Based on Remote Sensing Evapotranspiration Model

作　　者：张子敬 李明慧 ZHANG Zijing;LI Minghui(Vater Conservancy Science Experimental Station of Henan Yudong Water Conservancy Security Center,Kaifeng 475000,Ch)

机构地区：[1]河南省豫东水利保障中心水利科学试验站,河南开封475000

出　　处：《河南水利与南水北调》2024年第10期17-19,共3页Henan Water Resources & South-to-North Water Diversion

摘　　要：为评价灌区节水潜力,制定科学的节水方案,对某灌区2013~2020年的灌溉水利用效率和水分生产率进行了测算,并从不同角度确定了不同节水方案的节水潜力,结果表明:灌溉水利用效率与灌溉地降水量呈正相关,与净灌溉水量呈负相关,灌溉地降水量少,对应净灌溉水量少,节水潜力较大。根据该灌区2013~2020年累计水分生产率计算结果,短期(多年平均累计水分生产率的50%)和长期(多年平均累计水分生产率的70%)目标水分生产率分别为1.12 kg/m^(3)和1.31 kg/m^(3),短期和长期累计作物节水潜力分别为1.213×10^(8)m^(3)和2.804×10^(8)m^(3),表明水分生产率越高,累计节水潜力越大,提高水分生产率对节水具有显著作用。In order to evaluate the water-saving potential of an irrigation district and formulate a scientific water-saving plan,the irrigation water utilization efficiency and water productivity of the irrigation district from 2013 to 2020 are measured,and the water-saving potential of different water-saving plans are determined from different perspectives.The results show that the utilization efficiency of irrigation water is positively correlated with the the local precipitation and negatively correlated with the net irrigation water quantity.In case of less local precipitation and less net irrigation water quantity,the water-saving potential is higher.According to the calculation results of cumulative water productivity from 2013 to 2020,the short-term(50% of the annual average cumulative water productivity)and long-term(70% of the annual average cumulative water productivity)target water productivity are 1.12 kg/m^(3) and 1.31 kg/m^(3) respectively.The short-term and long-term cumulative crop water-saving potential are 1.213×10^(8)m^(3) and 2.804×10^(8)m^(3) respectively,indicating that the higher the water productivity,the greater the cumulative water-saving potential,and the improvement of water productivity has a significant effect on water saving.

关 键 词：节水潜力 工程节水 作物节水 水分生产率 

分 类 号：S275[农业科学—农业水土工程]