石羊河流域降水化学特征时空变化及来源浅析

Spatial and Temporal Variation of Chemical Characteristics and Source Analysis of Precipitation of Shiyang River Basin

运用相关分析、因子分析、富集因子和HYSPLIT模型对石羊河流域从2013年7月到2014年7月连续收集降水样品的主要离子浓度特征及来源进行了探讨分析,结果表明,Ca^(2+)和Na^+是主要的阳离子,SO_4^(2-)和NO_3^-是主要的阴离子,石羊河流域的主要降水类型为SO_4^(2-)-NO_3^--Ca^(2+);石羊河流域的总离子浓度的季节大小变化顺序为冬季>春季>秋季>夏季,石羊河流域的降水水化学主要受地壳源和人为源的影响;石羊河流域的降水类型分为季风降水、西风降水和混合降水,而混合降水是石羊河流域的主要降水类型,其次为西风降水,最后为季风降水。

This paper discussed the chemical characteristics and possible source of major ions in precipitation of Shiyang River Basin from July 2013 to July 2014 by using correlation analysis, factor analysis, enrichment factor and HYSPLIT model. Results show that Ca2＋ and Na＋ are main cations, and SO24- and NO3 are main anions. The main precipitation types in Shiyang River Basin is SO42-NO3- - Ca2＋. The order of seasonal total ions concentration of Shiyang River Basin is winter〉autumn〉spring〉summer. Precipitation chemistry of Shiyang River Basin is mainly affected by crustal and anthropogenic sources ; Type of precipitation of Shiyang River basin can be divided into monsoon precipitation, western precipitation and mixed precipitation. The mixed precipitation is the main type of precipitation in Shiyang River Basin, and then western precipitation.