Quantitative assessment and spatial characteristics analysis of agricultural drought vulnerability in China
Quantitative assessment and spatial characteristics analysis of agricultural drought vulnerability in China
复制标题
DOI：
10.1007/s11069-010-9591-9
复制
发表时间：
2011-03
期刊：
影响因子：
3.7
通讯作者：
Jianjun Wu;B. He;A. Lü;Lei Zhou;Ming Liu;Lin Zhao
中科院分区：
文献类型：
--
作者：
Jianjun Wu;B. He;A. Lü;Lei Zhou;Ming Liu;Lin Zhao
选取3个农业干旱脆弱性因子，构建基于GIS的农业干旱脆弱性评价模型，研究中国农业干旱脆弱性的空间特征。作物季节性缺水、土壤有效持水量和灌溉量是中国农业干旱脆弱性的主要指标。研究表明，我国作物季节性缺水分布在南北和东西两个方向上均表现出明显的分异，农业干旱脆弱性也呈现出相似的变化趋势。在区域范围内，中国南部和东部通常对干旱的脆弱性较低和中等，而中国北方和西部对农业干旱的脆弱性较高和非常高。从中国农业区域来看，西南中部、黄淮海南部与长江中下游北方之间地区和东北地区是中国农业干旱脆弱性较低的区域，而农业干旱脆弱性较高的区域主要分布在内蒙古、黄土高原和甘新地区。由于农业地区内部的自然和社会经济条件不同，不同农业地区之间和同一地区内部的农业干旱脆弱性差异很大。基于网格单元的农业干旱脆弱性评估方法为更好地描述区域乃至更小尺度的差异提供了基础。
In this study, the spatial characteristics of agricultural drought vulnerability in China were investigated using a GIS-based agricultural drought vulnerability assessment model, which was constructed by selecting three agricultural drought vulnerability factors. Seasonal crop water deficiency, available soil water-holding capacity and irrigation were identified as the main indicators of agricultural drought vulnerability in China. The study showed that the distribution of seasonal crop moisture deficiency showed significant differentiation in both north–south and east–west directions, and the agricultural drought vulnerability presented a similar trend. At a regional scale, southern and eastern China typically has a low- and moderate-vulnerability to drought, while high and very high vulnerability to agricultural drought is observed in northern and western China. In terms of China’s agricultural regions, the central part of the southwest region, the area between the southern Huang-Huai-Hai region and the northern part of the Middle and lower reaches of the Yangtze River region, and the northeast region are the areas of low agricultural drought vulnerability in China, while areas of high agricultural drought vulnerability are mainly located in the Inner Mongolia, Loess Plateau and Gan-Xin regions. Due to differences in the physical and social–economic conditions within the agricultural areas, vulnerability to agricultural drought exhibits substantial variability both between different agricultural regions and within the same region. The methodology of grid-cell-based agricultural drought vulnerability assessment, developed in this study, provides a foundation for better description of the differences in regional and even smaller scale.