摘要
利用十堰市辖区7个代表站1961～2006年的月降水和气温资料,采用R（降水距平百分率）指标、Z指标及综合了降水和气温作用的PT指数对3～11月份的干旱进行了划分,结果表明：3类指标都能不同程度地反映十堰地区的干旱,但是R指标对干旱的诊断往往比实际程度轻些,Z指标基本能反映各季节出现的干旱,但对夏季干旱反映较轻,PT指数在春秋季干旱中反映敏感性稍差,但对夏季干旱反映最好。十堰是同纬度地区干旱频发地区之一,干旱发生年份存在周期性和持续性;十堰市干旱地理分布是北部重于南部。文末讨论了十堰市干旱气候资源的利用。
The monthly rainfall and temperature data from 1961 to 2006 of 7 stations in Shiyan city were used.The drought from March to November was graded by R-index,Z-index and PT index.It was showed that three indexes could grade the drought in Shiyan city to some extent.The drought predicted by R-index was usually lighter than the actual drought,and the drought predicted by Z-index could basically reflect the drought in each season except in the summer.The sensitivity of PT index to spring and fall drought was low,however,it was good to summer drought.By analyzing the basic climate features of drought in this area,it was showed that Shiyan city was one of the areas which were frequently influenced by drought at the same latitude.Drought changed periodically and continuously.Drought was more severe in the northern area than the southern area.At last the application of drought resource in Shiyan city was discussed.
出处
《江西农业学报》
CAS
2008年第3期88-91,共4页
Acta Agriculturae Jiangxi
关键词
干旱
指标评估
特征分析
资源利用
Drought
Index evaluation
Characteristic analysis
Resource application
