Annual Variation of Irrigation Water Effective Utilization Coefficient and Analysis of Influencing Factors in Guangdong Province
Annual Variation of Irrigation Water Effective Utilization Coefficient and Analysis of Influencing Factors in Guangdong Province
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发表时间：
2015
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通讯作者：
Wang Xiaoju
中科院分区：
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作者：
Wang Xiaoju
运用分形理论，结合秩-尺寸律，对2005 - 2011年广东省各采样点灌溉水有效利用系数的尺度变化进行了系统研究，结果表明：灌溉水有效利用系数年变化具有两种明显的分形结构，分维值在5.95 - 10.92之间，从农业结构措施、配水措施、水管理措施、技术措施和田间灌溉水措施来看，水管理措施和技术措施的权重最大，基于优势分析法的贡献率为48.25%。
The scale changes of irrigation water effective utilization coefficient from 2005 to 2011in sampling sites of Guangdong were systematically studied using fractal theory with the the rank-size law.The results showed that annual effective utilization coefficient of irrigation water changed with two distinct fractal structure,and fractal dimension value ranged from 5.95 to 10.92,meaning that the overall trend was increasing and balanced year by year.From the aspects of structural measures for agriculture,water distribution measures,water management measures,technical measures and field irrigation water measures,the weight of water management measures and technical measure was the top,accounting for48.25% of the total contribution based on advantage analysis method.