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基于SWAT模型的杂木河流域出山径流模拟分析
发表时间：2009-11-15 浏览量：2039 下载量：976
| 全部作者： | 张晓森，张建明，焦文婷 |
| 作者单位： | 兰州大学资源环境学院 |
| 摘 要： | 在石羊河主要支流杂木河流域，应用SWAT（soil and water assessment tool）模型进行了出山径流模拟，从数据组织、模拟过程和模型参数三个方面讨论了径流模拟的影响因素，认为最主要因素是气候发生器，最敏感因素是最小汇水面积阈值和土地利用、土壤、坡级面积比阈值。最敏感参数依次为Cn2（土壤水分状态Ⅱ下的初始SCS径流曲线值）、Alpha_Bf（基流α因子）、Sol_K（饱和水力传导率）、Sol_Z（土壤深度）、Blai（最大可能叶面积指数）。在研究时段内，月均流量模拟值与观测值具有相似的变化趋势，但绝对误差在夏季最大、在冬季最小，这与SWAT模型的湿润区普适性以及杂木河流域降水、融雪等过程的水文特征有关。 |
| 关 键 词： | 地理学；径流模拟；SWAT；杂木河；石羊河流域 |
| Title： | The total runoff simulation in Zamu River basin based on SWAT |
| Author： | ZHANG Xiaosen, ZHANG Jianming, JIAO Wenting |
| Organization： | School of Resources and Environment, Lanzhou University |
| Abstract： | soil and water assessment tool (SWAT) was used to simulate the total runoff of Zamu River Basin in NW China. The impacts of data sources, simulation processes and model parameters on the stream flows were also explored. The most important factor is the weather generator, the sensitive factors are the threshold area of subbasins, the land use, soil and slope threshold levels of hydrologic research units (HRUs), and the sensitive parameters are successively Cn2 (initial SCS CN Ⅱ value), Alpha_Bf (baseflow alpha factor), Sol_K (saturated hydraulic conductivity), Sol_Z (soil depth), Blai (maximum potential leaf area index). During the tentative study, the modeled monthly average flows have a similar trend with the observed values, but the absolute error is maximal in summer and minimal in winter, which is correlated with the general application of SWAT model in humid areas, and is also influenced by the hydrologic characters of precipitation and snowmelt in Zamu River Basin. |
| Key words： | geography; runoff simulation; soil and water assessment tool; Zamu River; Shiyang River basin |
| 发表期数： | 2009年11月第21期 |
| 引用格式： | 张晓森，张建明，焦文婷. 基于SWAT模型的杂木河流域出山径流模拟分析[J]. 中国科技论文在线精品论文，2009，2（21）：2252-2260. |
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