| 引用本文： |
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肖志强，赵彦锋，吴巧娟.陇南山区干旱气候特征及其对农业生产的影响与灾害风险区划[J].大英文模板1,2014,(1):240-245. [点击复制]
- XIAO Zhi-qiang, ZHAO Yan-feng, WU Qiao-juan.The drought climatic characteristics in Longnan mountainous areas and its impact on agricultural production and zonation for disaster risk[J].大英文模板1,2014,(1):240-245. [点击复制]
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| 摘要: |
| 根据气象干旱等级标准（GB/T20481-2006），统计分析陇南市8县1区九个气象站1971—2010年年平均各类干旱频率得出：近40年陇南市平均出现干旱的年频率为60.3%，其中，春旱39.3%，夏初旱20.5%，伏旱38.5%，秋旱35.3%。利用各站经度、纬度、拔海高度与各站平均干旱年频率建立多元线性回归方程，计算陇南市各地平均干旱年频率，结合各地人口、GDP、耕地比等资料，利用ArcGIS软件，得到干旱灾害危险性图层，再同承灾体易损性评价、灾害的孕灾背景进行叠加、合并以及等级划分操作,最后得到干旱灾害的风险评估及其区划，结果表明：陇南市白龙江、白水江流域低海拔区干热河谷和徽成盆地及文县东南部干旱危险性等级最高，干旱年频率大于60.0％，由此向北向高干
旱危险性等级递减，武都区的池坝乡、马营乡高海拔区和宕昌西北部及文县西北部高海拔区干旱危险性等级最低，干旱年频率小于50.0％。徽县、成县、两当中部及西和北部以及武都、文县境内的白龙江、白水江流域低海拔区为干旱高风险区；宕昌与武都池坝乡、马营乡高海拔区和文县西北部高海拔区为干旱低风险区。 |
| 关键词: 陇南山区 干旱 气候特征 灾害风险区划 |
| DOI： |
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| 基金项目:甘肃省气象局项目（2013-20）“陇南山区特色农业气象灾害风险区划与气候区划研究” |
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| The drought climatic characteristics in Longnan mountainous areas and its impact on agricultural production and zonation for disaster risk |
| XIAO Zhi-qiang1, ZHAO Yan-feng2, WU Qiao-juan1 |
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| Abstract: |
| According to the rating standard of meteorological drought (GB/T20481-2006), through statistical analysis for the yearly average drought frequency from 1971 to 2010 of nine meteorological stations in Longnan City as covering 8 counties and 1 district, have obtained the conclusions as follows: The average drought occured yearly frequency was 60.3% in the last 40 years. Among them, the spring drought was 39.3%, the early summer drought was 20.5% and late summer drought was 38.5%, the autumn drought was 35.3%. By using the longitude, latitude, altitude and the yearly mean drought frequency of the nine stations, has established the multivariate linear regression equation, to calculated the average annual drought frequency of each region in Longnan City, then combined with the information such as population, GDP and the cultivated land ratio and so on, using the ARCGIS software to obtain the drought disaster danger map layer. Then added and combined the evaluation of disaster easy damage, the background of disasters and compartmentalizing the grade. In the last, has obtained the risk evaluation for the drought disaster. The results showed that: The dangerous grade of drought was highest in the dry-hot valley with lower altitude areas of Bailong River and Baishui River in Longnan City and the Huicheng Basin, and southeast of Wen County, the yearly drought frequency was higher than 60%. From here to the north, the high dangerous grade of drought declined, the lowest risk grade of drought were at the Chiba Town of Wudu, the higher altitude region in Maying Town, the northwest of Tanchang County and the northwest part with high altitude in Wen County, where the average annual drought frequency was lower than 50%. The risk of drought was high in Hui County, Cheng County, the central and northwest of Liangdang County, the Bailong River and Baishui River Basin in Wudu and Wen County; the risk of drought was low in Tanchang County, Chiba Town and Maying Town in Wudu, and the northwest of Wen County. |
| Key words: Longnan mountainous area drought climate characteristics zonation for disaster risk |
