广东省灌溉水有效利用系数影响因素的动静态分析

Static and dynamic analysis of factors affecting the efficient utilization coefficient of irrigation water in Guangdong Province

为定量表征灌溉水有效利用系数各影响因素的具体作用,在对广东省2005—2011年样点灌区多年实测数据分析整理的基础上,将众多影响因素分为静态和动态两类,定量分析地形地貌、渠系特征、土壤质地、工程状况、供用水量、耕作面积、水利投资和工程效益等8个因素对灌溉水有效利用系数的影响程度。分析结果表明,以工程状况、供用水量、耕作面积和水利投资为代表的动态因素对灌溉水有效利用系数的提高有决定性作用,其中又以节水灌溉面积和完成投资这两个因素对灌溉水利用系数的提高影响最大。

Quantitative analysis of the role of factors of the effective utilization coefficient of irrigation water has a significant practical guide sense for the increase of coefficients. Based on the analysis of observed data from 2005 to 2011 in sample irrigation districts of Guangdong Province,the factors were divided into dynamic and static. Among them,eight factors including terrain, channel characteristics, soil texture, engineering, supply and consumption, farming area, water conservancy project investment,and benefit were analyzed for quantifying their influences on effective utilization coefficient of irrigation water. The results showed that the dynamic factors represented by engineering,supply and consumption,farming area,and water conservancy project investment play a decisive role to the rapid increase of effective utilization coefficients of irrigation water and,especially the factors water-saving irrigation area and the completion of investment have the most impact.