摘要
本研究根据该县1980～2007年水文站的观测资料，经过统计计算，对降水、蒸发、径流、输沙量等因子的变化规律进行了详细分析。结果表明：28a间该地区8月份的平均降水量、径流量和输沙量最大，而5月份的蒸发量最大；夏季的降水量、径流量和输沙量明显高于其他几个季节，春季和夏季的蒸发量相差不大，均高于秋、冬季；降水量年际变化总的趋势是上升的，而蒸发量、径流量和输沙量均有不同程度的减少。此结果为探讨水文特征与森林植被之间的关系，给吴起县植被建设提供理论依据。
Variation regularities of hydrological factors, such as precipitation, evaporation, runoff and sediment discharge were analyzed in detail according to the long-term observation data between 1980 and 2007 in Wuqi County, Shaanxi Province. The results showed that the average precipitation, runoff and sediment discharge reached their tops in August, while the largest amount of average evaporation was in May; precipitation, runoff and sediment discharge in summer were higher than those in the other seasons, and evaporation in spring and summer had no significant difference and both of them were higher than those in fall and winter, the precipitation of Wuqi County had a rising trend in recent 28 years, and evaporation, runoff and sediment discharge reduced with different degrees during the same period. The conclusions can be used for the research of the relationship between hydrologic characteristics and vegetation, and to provide theoretical basis for vegetation restoration in Wuqi County.
出处
《西北林学院学报》
CSCD
北大核心
2009年第4期57-61,共5页
Journal of Northwest Forestry University
基金
国家"十一五"科技支撑计划林业项目<西北农牧交错带严重侵蚀区植被恢复与造林技术研究>(2006BAD03A0308)
关键词
吴起县
水文特征
降水
蒸发
径流
输沙
Wuqi County
hydrologic characteristic
precipitation
evaporation
runoff
sediment discharge
