江西省赣抚平原灌区降雨分布及干旱等级划分

发布时间：2018-06-02 05:48

  本文选题：分布特征 + 降雨量　； 参考：《中国农村水利水电》2017年04期

【摘要】：科学分析降雨分布及合理划分干旱等级,是区域水资源优化配置,灌好关键水,减少旱情危害的关键。针对江西省赣抚平原灌区1978-2012年气象数据进行分析,研究赣抚平原灌区降雨分布及不同干旱等级分布特征。结果表明,赣抚平原灌区降雨在年内分布不均匀,年总降雨量偏度系数偏小,6-9月降雨量年际偏度系数偏大,年总降雨量值、7-9月降雨量值没有明显的趋势性变化;近35年来受旱年份占比29%,正常年份占比71%;7月份受旱年份较少,以轻旱为主;8月和9月受旱年份占比均为34.3%,较容易受旱。
[Abstract]:Scientific analysis of rainfall distribution and rational division of drought grade are the keys to the optimal allocation of regional water resources, the irrigation of key water and the reduction of drought damage. Based on the meteorological data from 1978 to 2012 in Ganfu Plain Irrigation District of Jiangxi Province, the characteristics of rainfall distribution and drought grade distribution in Ganfu Plain Irrigation area were studied. The results show that the rainfall distribution is uneven in Ganfu Plain, the annual total rainfall deviation coefficient is small and the inter-annual deviation coefficient of annual total rainfall is larger than that of June to September rainfall, and the annual total rainfall value has no obvious trend change in July and September. In recent 35 years, the proportion of drought-stricken years was 29%, and that of normal years was 71- / -7.The drought was mainly light drought in July, while in August and September, the proportion of drought-stricken years was 34.3%, so it was easy to suffer from drought.
【作者单位】： 江西省灌溉试验中心站;
【分类号】：S161.6;S423
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本文编号：1967651