信阳市干旱成因及其防御对策

信阳市发生的干旱主要有伏旱、秋旱和冬旱3种类型,且夏季发生干旱的频率远高于其它季节。干旱的成因除季风环流、地形地貌、地下水资源因素外,还有水利排灌设施不健全、农业生产结构与作物布局不合理、工业生产规模扩张等社会经济因素。本文在利用Pa法分级统计旱灾发生频次、总结旱灾发生规律的基础上,提出了有针对性的防御对策。

Study on the causes and defense strategies for drought In Xinyang City

Droughts occurred in Xinyang City mainly fall into three categories: the midsummer drought, the autumn drought and the winter drought.And the frequency of midsummer drought is much higher than that of the other two.In addition to natural factors, such as monsoon circulation, landforms and underground water resources, droughts are also associated with some socially economic factors, including incompletion of irrigation equipments, irrationality of agricultural production structure and crop arrangement, enlargement of industrial production, and so forth.Based on the statistics, which are obtained by using Pa method in different degrees, of the drought's frequency and regularities of the drought's occurrence, this text puts forward feasible defense strategies, to be specific, including long-term defense strategies, short-term reaction techniques and after-drought temporary remedial measures.