基于模糊综合干旱指数的黄河源区作物生长季干旱时空分布分析

发布时间：2018-06-29 05:14

本文选题：黄河源区 + 模糊综合评价　；参考：《武汉大学学报(工学版)》2017年05期

【摘要】：依据黄河源区28个气象站点的逐月气象资料,运用模糊综合法建立了源区综合干旱指数,从而较为全面地分析了黄河上游源区作物生长季干旱时空分布特征.结果表明:黄河源区大部分地区轻中干旱发生频繁,且发生频率高于重特干旱.流域内春旱最为严重,夏秋干旱次之.生长季重特干旱在西部高海拔寒冷地区发生频率低,在半牧业半农业地区发生频率相对较高.1960-2013黄河上游源区干旱主要经历了4个时期,主振荡周期为28a.黄河源区干湿突变年为1982年和2000年.结合历史实情,基于模糊综合法建立的综合干旱指数,监测结果与历史实情吻合,适宜用于黄河源区干旱监测,能够较科学地反映源区干旱情形.
[Abstract]:Based on the monthly meteorological data of 28 meteorological stations in the source region of the Yellow River, the comprehensive drought index of the source area was established by using the fuzzy synthesis method, and the space-time distribution of crop drought in the source region of the upper Yellow River was analyzed comprehensively. The results show that light and moderate drought occurs frequently in most areas of the source region of the Yellow River, and the frequency of occurrence is higher than that of severe and special drought. Spring drought is the most serious in the basin, followed by summer and autumn drought. The frequency of heavy and special drought in the high altitude cold region of western China is low in the growing season, and the frequency of drought in semi-animal husbandry and semi-agricultural area is relatively high. The drought in the source region of the upper reaches of the Yellow River from 1960 to 2013 has experienced four periods, and the main oscillation period is 28a. The dry and wet abrupt years in the source area of the Yellow River are 1982 and 2000. Based on the historical facts and the comprehensive drought index established by the fuzzy synthesis method, the monitoring results are consistent with the historical facts, which is suitable for drought monitoring in the source region of the Yellow River, and can reflect the drought situation in the source region more scientifically.
【作者单位】：西安理工大学西北旱区生态水利工程国家重点实验室培育基地;
【基金】：水利公益性行业科研专项经费项目(编号:201501058) 陕西省重点科技创新团队项目(编号:2012KCT-10) 陕西省教育厅重点实验室科研计划项目(编号:13JS069)
【分类号】：S423

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