宁夏清水河流域干旱演变特征分析

采用降水距平、径流系数、干旱指数等指标,对清水河流域1959—2005年的水文气象资料进行分析,研究该流域近45年的干旱演变特征,结果表明：20世纪70年代初期以及进入80年代后,该流域气候干旱程度加剧,未来干旱现象还有延续之势。需采取更有效的节水措施,以逐步改善日益脆弱的生态环境,实现经济社会的可持续发展。

Analysis of Evolution Characteristics of Dry in Qingshui River Region

Nearly 45 years of evolution characteristics of dry in Qingshui River Region was studied by using precipitation anomalies, runoff coefficient and drought index, combining with the area meteorological and hydrological date from 1959 to 2005. The result showed that the degree of drought stress has been intensified since early 1970＇s and in the 1980＇s, and still be continued. It was suggested that water saving technique should be used more efficiently in the future, to ameliorate the ecological environment and implement social sustainable development.