江苏省农田灌溉水有效利用系数年际变化及其影响因素分析

鞠艳; 杨星; 毕克杰; 王怀川; 张雯叶

引用本文:	鞠艳,杨星,毕克杰,等.江苏省农田灌溉水有效利用系数年际变化及其影响因素分析[J].灌溉排水学报,2022,(12):-.
	JU Yan,Yang Xing,Bi Kejie,et al.江苏省农田灌溉水有效利用系数年际变化及其影响因素分析[J].灌溉排水学报,2022,(12):-.

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江苏省农田灌溉水有效利用系数年际变化及其影响因素分析
鞠艳¹, 杨星¹, 毕克杰², 王怀川², 张雯叶¹
1.江苏省水利科学研究院;2.无锡市水利局农村水利与水土保持处

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，有助于地区农田灌溉用水效率提升以及措施的合理制定。【方法】为此，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】研究结果表明: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。

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

DOI：

分类号:S274.4

基金项目:江苏省水利科技项目(2019043)

Inter-annual Variability of Irrigation Water Effective Utilization Coefficient and its Influencing Factors in Jiangsu Province

JU Yan¹, Yang Xing¹, Bi Kejie², Wang Huaichuan², Zhang Wenye¹

1.Jiangsu Hydraulic Research Institute;2.Rural Water and Soil Conservation Department of Wuxi Water Conservancy Bureau

Abstract:

【Objective】In order to improve the irrigation water use efficiency and rationalization of measures, the inter-annual variation of irrigation water effective utilization coefficient (IWEUC) in Jiangsu Province was analyzed. 【Method】Taking comprehensive consideration of natural factors, planting structure, management levels, and water-saving engineering, the major influencing factors of IWEUC was investigated through partial correlation analysis and principal component analysis. 【Result】Results showed that: IWEUC in Jiangsu Province was higher than that of the whole country and showed an insignificant increasing trend from 2014 to 2021. IWEUC and its trend were negatively correlated with irrigation district size. In terms of different water source types, the IWEUC of medium self-sized irrigation districts showed an increasing trend with the largest change rate. The area of water-saving engineering showed an extremely significant effect on IWEUC (P<0.01). The positive contribution of water-saving engineering and natural factors was greater than others. 【Conclusion】The establishment and improvement of water conservation system and management promoted by integrated agricultural water pricing reform played an essential role in optimizing the management of irrigation districts, strengthening the construction of water-saving engineering, and improving IWEUC.

Key words: irrigation water effective utilization coefficient; principal component analysis; integrated agricultural water pricing reform; water-saving irrigation; irrigation district