| 灌区渠系特征与灌溉水利用系数的Horton分维 |
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| 引用本文： | 王小军,张强,易小兵,肖名忠.灌区渠系特征与灌溉水利用系数的Horton分维[J].地理研究,2014,33(4):789-800. |
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| 作者姓名： | 王小军 张强 易小兵 肖名忠 |
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| 作者单位： | 1. 广东省水利水电科学研究院, 广州 510635;
2. 中山大学水资源与环境系, 广州 510275 |
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| 基金项目： | 广东省水利科技创新项目（201107）；水利部公益性行业科研专项项目（200901074）；国家自然科学基金项目（41071020） |
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| 摘 要： | 灌区渠系和自然河流水系存在着诸多相似之处,因此,对于灌区渠系体系是否存在及在何种程度下满足Horton河系定律值得研究。以2010年广东省53宗样点灌区为研究对象,分类进行了适用性分析,发现只有四级渠系类灌区满足Horton河系定律。在此基础上计算了各级渠系类灌区的渠系特征参数和分维值,并利用2007-2011年实测数据,对其与灌溉水有效利用系数之间的作用关系进行了定性和定量分析,结果表明:渠系工程状况参数(0.1084)下垫面参数(-0.3554)渠系结构参数(-0.5189)面积尺度参数(-0.5392)渠系分维特征参数(-0.5536)。本研究对于定量表征灌区形态和渠系特征对灌溉水有效利用系数的影响提供了新的途径,研究结果对于指导灌区渠系规划建设,提高用水效率具有积极现实意义。
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| 关 键 词： | Horton定律 渠系 灌溉水有效利用系数 |
| 收稿时间： | 2013-07-01 |
Study on the Horton fractal dimension with the irrigation canal system characteristics and effective utilization coefficient of irrigation water |
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| WANG Xiaojun,ZHANG Qiang,YI Xiaobing,XIAO Mingzhong.Study on the Horton fractal dimension with the irrigation canal system characteristics and effective utilization coefficient of irrigation water[J].Geographical Research,2014,33(4):789-800. |
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| Authors: | WANG Xiaojun ZHANG Qiang YI Xiaobing XIAO Mingzhong |
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| Institution: | 1. Guangdong Institute ofWater Resources and Hydropower Research, Guangzhou 510635, China;
2. Department ofWater Resources and Environment, Sun Yat-sen University, Guangzhou 510275, China |
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| Abstract: | There are many similarities between irrigation canal system and natural river system, therefore, whether the Horton River's law can be applied to the irrigation canal system is a problem worthy of study. In this paper, based on the classification of 53 cases of sample irrigation districts in 2010 in Guangdong Province, the applicability of the Horton River's law to the irrigation canal system is analyzed. It is found that only the fourth class irrigation canal district can meet the Horton River's law. And then the parameters of canal system at all levels of irrigation canal system classes and the value of fractal dimensions are calculated. Furthermore, with the measured data of 2007-2011, the qualitative and quantitative coefficient relationship between the previous results and the irrigation water are analyzed. The results show that: canal project status parameter (0.1084) > land surface parameters (-0.3554) > canal structure parameters (-0.5189) > size scale parameter (-0.5392) > canal fractal characteristic parameters (-0.5536). This study provides a new way for achieving the quantitative characterization of irrigation canal system morphology and characteristics of effective utilization coefficient of irrigation water effects, and the results are of important practical value for guiding planning and construction of irrigation canal and improving the efficiency of water use. |
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