| 基于分形的中国地均农畜产品虚拟水规模分布的时空演变研究 |
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| 引用本文： | 孙才志,张蕾.基于分形的中国地均农畜产品虚拟水规模分布的时空演变研究[J].地理科学,2009,29(3). |
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| 作者姓名： | 孙才志 张蕾 |
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| 作者单位： | 辽宁师范大学海洋经济与可持续发展研究中心,辽宁,大连,116029 |
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| 基金项目： | 国家社会科学基金(07BJY066)资助 |
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| 摘 要： | 虚拟水是当今水科学的研究热点,被认为是解决粮食与水资源安全的重要策略。在测算中国各地区农畜产品虚拟水总量的基础上,计算出1996~2006年中国农畜产品虚拟水与耕地资源的基尼系数,表明二者地区差异不大且在逐年减小。运用位序-规模法则,探讨差异背后的分形特征。研究表明:中国地均农畜产品虚拟水体系不具有首位分布的特征;双对数回归方程拟合度较高,符合位序-规模分布;分维值D大于1,且逐年升高,地均农畜产品虚拟水规模分布整体差距在缩小,均衡程度在增强;规模分布呈双分形结构,体现出地均农畜产品虚拟水大规模省市发展较慢且辐射带动作用较弱,中小规模的省市比较发育且发展较快。本文旨在揭示地均农畜产品虚拟水的空间分异特征规律,为制定不同区域类型的农业发展决策提供相应的理论参考。
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| 关 键 词： | 地均农畜产品虚拟水 基尼系数 位序-规模法则 双分形结构 |
Spatial-temporal Distribution of Crop-livestock Product Virtual Water Per Cultivated Land in China Based on Fractal Theory |
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| Sun Cai-zhi,Zhang Lei.Spatial-temporal Distribution of Crop-livestock Product Virtual Water Per Cultivated Land in China Based on Fractal Theory[J].Scientia Geographica Sinica,2009,29(3). |
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| Authors: | Sun Cai-zhi Zhang Lei |
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| Institution: | KRI;Centre for Studies of Marine Economy and Sustainable Development of Liaoning Normal University;Dalian;Liaoning 116029 |
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| Abstract: | Virtual water has become the central issue of water sciences,and has been regarded as a main countermeasure to solve risks of food security and water security.On the base of calculating the total quantity of main crop-livestock product virtual water,this paper calculated the Gini coefficient of crop-livestock product virtual water verse cultivated land and the result showed that the Gini coefficient of crop-livestock product virtual water verse cultivated land were less than 0.4(warning limit) from 1996 to ... |
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| Keywords: | crop-livestock product virtual water per cultivated land Gini coefficient rank and size law bi-fractals |
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