| 辽宁本溪市自然降水趋势变化与农业旱涝程度分析 |
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| 引用本文： | 李志静,李西平.辽宁本溪市自然降水趋势变化与农业旱涝程度分析[J].安徽农业科学,2010,38(23):12577-12579,12610. |
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| 作者姓名： | 李志静 李西平 |
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| 作者单位： | 辽宁省本溪市气象局,辽宁本溪,117100 |
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| 摘 要： | 采用线性回归、气候倾向率、积分湿度指标和干湿指标分析辽宁本溪降水趋势变化和旱涝频率及发生时段。结果表明,在近55年里,本溪年降水量倾向率为-30.749mm/10a,趋势减少165mm;植物生长季降水量倾向率为-31.371/10a,趋势减少173mm。气候类型有所转变,由20年前是轻涝型转为湿润型。农业需水满意程度在150%以上,年平均降水盈余290mm;中涝至重涝有10年,约五年一遇;出现轻旱有5年,约十年一遇。春季中旱以下约十年二遇,中涝以上约十年一遇;夏季中涝以上约二年一遇;秋季中涝以上约十年二遇,中旱以下约十年四遇。7、8月重涝出现频率54.5%。5月和9月是干旱发生频率较高时段。
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| 关 键 词： | 降水 趋势变化 旱涝程度 农业 本溪 |
Analysis on Variation of Rainfall Trend and Agriculture Dryness in Benxi City of Liaoning Province |
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| Institution: | LI Zhi-jing et al (Meteorological Bureau of Benxi City in Liaoning Province,Benxi,Liaoning 117100) |
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| Abstract: | Linear regression,climate trend rate,integral humidity indicators and indicators of wet and dry were adopted to analyze the precipitation change,drought or waterlogging frequency and occurrence period in Benxi of Liaoning. The results showed that in recent 55a,the tendency of the annual precipitation rate of Benxi was-30.749 mm/10a,reducing 165 mm; precipitation tendency rate during the growing season of plants was-31.371/10a,reducing 173 mm. The climate type was changed from light flood to wet type. Agricultural water demand satisfaction was above 150%,and annual average precipitation surplus was 290 mm; the floods to heavy floods have 10a,about once in five years; occurrence of mild drought has 5a,about once in ten years. Dry spring in the case of the following decade or two,in a case of floods over about a decade; in floods over the summer about once in two years; fall in the second case of floods over about a decade,in case of drought the following about four years. The occurrence frequency of heavy waterlogging in July and August was 54.5%. May and September was the high frequency of drought periods. |
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| Keywords: | Precipitation Variation trend Dryness Agriculture Benxi |
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