摘要
干旱灾害是中国重大自然灾害之一，严重影响着城乡居民生活和工农业生产。基于GIS技术模拟区域历史大旱时可再现历史大旱发生过程与影响范围，对防旱抗旱具有重要意义。以安徽省北部6个地级市为研究区域，将降水距平百分率作为旱情评估指标，采用GIS空间技术对研究区1978年历史大旱的旱情进行了模拟与评估。结果表明，1978年干旱影响范围广、历时长，大部分地区3～9月发生了持续干旱，约37％的区域达到特大干旱等级。评估结果与实际情况相吻合，说明GIS技术在区域干旱模拟与评估研究中具有较广泛的应用价值。
Drought disaster is one of the great natural disasters and it seriously affects the residents＇ living and the industrial and agricultural production. Simulating and evaluating regional historical drought events based on GIS, recreating the processes and severity of historical drought, are very important for preventing and resisting drought. Taking six cities of northern Anhui Province as an study area, GIS space technology is used to simulate and evaluate regional historical drought in 1978 by taking the percentage of precipitation anomalies （Ps） as an indicator of drought severity. The results show that the drought spread almost the whole area, and continued 7 months from March to September in most areas, ahour 37 percent of the areas reached large drought. The results are in accord with the actual conditions, which demonstrates that GIS can be applied widely in the research of regional drought simulation and evaluation.
出处
《水电能源科学》
北大核心
2014年第6期1-4,共4页
Water Resources and Power
基金
水利部公益性行业科研专项经费项目(201001078
201001043)
国家自然科学基金项目(71273081
41171075
51109052)
水利部重大基建前期项目
中国气象局成都高原气象开放实验室基金课题(LPM2011002)
关键词
历史大旱
降水距平百分率
GIS
模拟
评估
安徽省
historical drought
percentage of precipitation anomalies
GIS
simulation
assessment
Anhui Province
