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-  2017 

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 Drought temporospatial distributions of crop growth season in source region of Yellow River based on fuzzy comprehensive drought index

Keywords: 黄河源区,模糊综合评价,综合干旱指标,干旱时空分布

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Abstract:

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

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