摘要
应用SWAT模型对东江上中下游典型流域的地表径流进行模拟,采用1977-1981年和1996-2000年胜前、顺天和九州三个出口控制站逐月实测径流资料进行模型校准和验证,确定模型的敏感性参数,采用相关系数R2和Nash-Suttclife模型效率系数ENS,对SWAT模型模拟结果进行评价,结果显示模拟精度较高,R2>0.85,ENS在0.68-0.75之间.在此基础上进一步探讨了典型流域土地利用变化对地表径流的影响,研究认为林地面积的增加可导致年径流量减少;年内分配上枯水期径流明显增加,丰水期径流明显减少;小于15°的林地面积增加引起的径流减少作用更为明显.
With the hydrological model SWAT,the runoff variation of three representative watersheds in Dongjiang River Basin was simulated.With discharge data from Shengqian,Shuntian and Jiuzhou hydrological stations in 1977-1981 and 1996-2000,more sensitive hydrology factors were calibrated and satisfactory simulation results were obtained（R2 0.85,0.68ENS0.75）.The study investigated the influences of LUCC on the hydrological process of the three watersheds.The result shows that：（1） the increase of forest area was the cause of annual runoff decrease;（2） in terms of annual variability,runoff decrease in the wet season while increase in the dry season;（3） the decrease of runoff becomes more notable when the forest area increases with slope15o.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2011年第6期991-996,共6页
Journal of Lake Sciences
基金
香港特别行政区研究基金会项目(CUHK4627/05H)资助
