摘要
通过对宁夏中卫市1979—2008年30a历史降水资料的统计,利用降水量距平百分率法对该时期中卫市地区干旱灾害的时间变化、旱灾等级和成因等进行了分析,并对当地主要农作物(春小麦和玉米)的关键需水期干旱程度进行了计算。结果表明:宁夏中卫市农业干旱具有季节性、持续性、随机性和频繁性的特点。当地农业干旱发生频繁,以春旱为主,发生频率达53%;对当地农业影响最大的是春夏连旱,其发生频率达30%。据此,作者提出了相应的抗旱措施和方法。
Through statistics and analysis of historical precipitation data from 1979 to 2008 in Zhongwei City,Ningxia Hui Autonomous Region,the paper studied the change,grades and causes of the drought disaster by using method of precipitation anomalies.The drought grade during the key water requirement periods of local main crops（spring wheat and maize） was calculated.The results showed that the agricultural drought had the seasonal,durative,random and frequent characteristics.Agricultural drought frequently occurred during the 30 years,drought mainly occurred in spring,its probability of occurrence reached 53%;drought occurring in spring and summer multi-seasons most influenced the local agriculture,its probability of occurrence reached 30%.Accordingly,the authors proposed corresponding countermeasures and methods to control drought.
出处
《水土保持研究》
CSCD
北大核心
2012年第1期217-221,共5页
Research of Soil and Water Conservation
基金
中国气象局干旱气候变化与减灾重点开放实验室开放基金项目(IAM201003)
宁夏自然科学基金项目(NZ1128)
宁夏大学211重点学科建设项目"草业科学与生态工程子项目"
关键词
农业干旱特点
降水量指标
对策
宁夏中卫市
agricultural drought characteristic
precipitation index
countermeasures
Zhongwei City of Ningxia Hui Autonomous Region
