灞河流域水文特性分析

根据灞河流域1953年～2005年53年的实测水文资料,采用数理统计等方法,系统分析了流域降水、蒸发、径流、洪水、泥沙等水文特性.结果表明:流域内径流、洪水、泥沙等主要受降水影响,总体特征为年际变化大,年内分配不均匀;流域水面蒸发量变化趋势为由南向北,由山区向平原递增,变化范围在之750～800 mm之间;地表水水质近年污染程度总体呈下降趋势等,这些结论为灞河水资源开发利用和西安城市发展提供基础依据.

Hydrologic Characteristics Analysis in Bahe River Basin

According to the measured runoff data in Bahe River Basin during 1953 to 2005, Using the mathematical statistic methods,analyzed the hydrologic characteristics as basin precipitation, evaporation, runoff, flooding and sediment. Results showed that: Basin runoff, flood and sediment were mainly affected by precipitation, the overall feature was yearly variability and unevenly distributed in the year. The tendency of basin water evaporation was increasing from south to north, and from the mountains to the plains, the range changed between 750 ～ 800 mm. In recent years, the degree of pollution for surface water quality declined totally. These important conclusion can provide the scientific basis for exploitation and utilization of water resources in Bahe River and urban development in Xi'an.