摘要
以洮河流域为研究区,基于SWAT模型模拟,从多年平均径流、典型年径流和径流波动性等3方面探讨土地利用变化对河川径流过程的影响.结果表明:1980s-2000s洮河流域土地利用变化背景下,上游甘南片区径流量减少、下游黄土片区径流量增加;土地利用变化对上游枯水年径流和下游丰、平水年影响较大;对洮河上游甘南片区径流波动有微弱抑制,使洮河下游黄土片区的径流波动有一定的增强.
Selecting the Tao River Basin selected as the study area, the model SWAT was adopted to simulate hydrologic variations under different land use scenarios. The multi-yearly averaged runoff, the annual runoff in representative hydrologic years and the runoff fluctuations of the hydro-series were quantified based on the outputs of the soil and water assessment tool. It was found that impact of land use changes were more obvious in Gannan in the upper reaches of the Tao River, the annual average runoff was decreased by land use changes in the upper reaches and increased in the lower reaches. In the representative hydrologic years, land use changes produced more effect in drier times in the upper Gannan area, while it affected more in wetter times in the lower loess area. As for runoff fluctuations, they were suppressed by land use changes in the upper area, while enhanced in the lower area of the Tao River Basin.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第6期913-918,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(41001014)
关键词
地利用变化
径流过程
洮河流域
land use change
runoff process
Tao River Basin
