摘要
【目的】分析灌溉水有效利用系数(IWEUC)的变化趋势及其影响因素。【方法】以江苏省为例,分析其IWEUC的变化趋势,同时从自然因素、种植结构、管理水平以及节水工程等4个方面因素,采用偏相关分析和主成分分析,探讨IWEUC的主要影响因素。【结果】①2014—2021年,江苏省不同规模与类型灌区的灌溉水有效利用系数呈稳步增长趋势,且走在全国前列;②从灌区规模来看,灌溉水有效系数及其增长趋势与灌区规模呈负相关关系,从不同水源类型来看,中型自流灌区的系数增速最快;③节水灌溉工程面积对系数的影响最大且极其显著(P<0.01),节水工程和自然因素的正贡献率较大。【结论】农业水价综合改革推动下的灌区节水制度建立健全以及工程管护水平的提升,对优化和提升灌区管理水平、促进灌溉水有效利用系数提高,具有重要作用。
【Objective】Improving utilization efficacy of irrigation water((IWEUC))is part of sustainable agriculture development.Understanding its determinations and variation is essential to achieving this goal and improving water resources management.In this paper,we analyze the annual variation in IWEUC in Jiangsu province as well as its determinants.【Method】The analysis considers natural factors,planting structure,management level,and water-saving engineering projects.The factors that impact IWEUC most are investigated using partial correlation analysis and principal component analysis.【Result】①IWEUC in Jiangsu province is higher than the rest of the country and does not show insignificant increase from 2014 to 2021.IWEUC and its change is negatively correlated to the size of irrigation districts.②In terms of irrigation water sources,the IWEUC in gravity-driven irrigation districts has increased more than in other irrigation districts.③The areas of water-saving engineering projects in an irrigation district impacts IWEUC significantly(P<0.01).The contribution of water-saving engineering projects and natural factors is more than that from others.【Conclusion】Establishing and improving water conservation system and management and reforming water pricing plays an essential role in optimizing management of irrigation districts,strengthening construction of water-saving engineering projects,and improving IWEUC in Jiangsu province.
作者
鞠艳
杨星
毕克杰
王怀川
张雯叶
JU Yan;YANG Xing;BI Kejie;WANG Huaichuan;ZHANG Wenye(Jiangsu Hydraulic Research Institute,Nanjing 210017,China;Rural Water and Soil Conservation Department of Wuxi Water Conservancy Bureau,Wuxi 214031,China)
出处
《灌溉排水学报》
CAS
CSCD
北大核心
2022年第12期123-130,共8页
Journal of Irrigation and Drainage
基金
江苏省水利科技项目(2019043)。
关键词
农田灌溉水
有效利用系数
主成分分析
农业水价综合改革
节水灌溉
灌区
irrigation water
effective utilization coefficient
principal component analysis
integrated agricultural water pricing reform
water-saving irrigation
irrigation district
