摘要
内蒙古地区属干旱半干旱地区,年降水量少,且时空分布很不均匀,干旱是本地区最主要的自然灾害。为了揭示自治区不同区域发生旱灾的时空分布特征,调查分析了内蒙古自治区101个旗县1990-2007年间因旱造成的农业、牧业、城镇居民生活及工业方面的损害程度及相应降水资料。运用统计计算、频率分析等方法,初步确定了内蒙古自治区的旱情时空分布特征,确定了内蒙古自治区3个易旱季节（春旱、春夏旱、春夏秋旱）旱灾易发区的分布区划及3个级别的旱灾等级（严重旱灾、中度旱灾、轻度旱灾）发生频率和分布区划。该结果可为下一步旱灾预警预报及抗旱减灾、水资源规划配置提供参考依据。
Inner Mongolia belongs to arid and semiarid area,with little and unevenly-distributed precipitation,hence drought is the major natural disaster.In order to reveal the characteristics of temporal and spatial distribution of drought occurrence in different areas of Inner Mongolia,survey and analysis are conducted of the data of precipitation and damage caused by drought to agriculture and animal husbandry in 101 counties of the region during 1990～2007.By using the methods of statistic calculation and frequency analysis,the characteristics of temporal and spatial distribution of drought occurrence in the region are found out,including the frequency and distribution of areas and seasons（spring,spring～summer,spring～summer～autumn） prone to occurring drought and levels of drought（severe,moderate,mild）.These results may serve as reference for the prediction and forewarning of drought,reduction of damage and planning and allocation of limited water resources.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第5期266-272,共7页
Agricultural Research in the Arid Areas
基金
2008年全国抗旱规划-内蒙古自治区抗旱规划
关键词
旱灾等级
易旱季节
时空分布
旱情
drought level
drought-prone season
temporal and spatial distribution
drought situation
