Effects of initial soil water content and saturated hydraulic conductivity variability on small watershed runoff simulation using LISEM
文献类型：SCI/SSCI论文
| 作者 | Hu W.; She, D. L.; Shao, M. A.; Chun, K. P.; Si, B. C. |
| 发表日期 | 2015 |
| 关键词 | spatial variability LISEM runoff Loess Plateau of China soil moisture saturated hydraulic conductivity variabilite spatiale LISEM ruissellement Plateau de loess (Chine) humidite du sol conductivite hydraulique a saturation digital elevation model spatial variability loess plateau overland-flow erosion model moisture catchment roughness china slope |
| 英文摘要 | Soil water content () and saturated hydraulic conductivity (K-s) vary in space. The objective of this study was to examine the effects of initial soil water content ((i)) and K-s variability on runoff simulations using the LImburg Soil Erosion Model (LISEM) in a small watershed in the Chinese Loess Plateau, based on model parameters derived from intensive measurements. The results showed that the total discharge (TD) and peak discharge (PD) were underestimated when the variability of (i) and K-s was partially considered or completely ignored compared with those when the variability was fully considered. Time to peak (TP) was less affected by the spatial variability compared to TD and PD. Except for TP in some cases, significant differences were found in all hydrological variables (TD, PD and TP) between the cases in which spatial variability of (i) or K-s was fully considered and those in which spatial variability was partially considered or completely ignored. Furthermore, runoff simulations were affected more strongly by K-s variability than by (i) variability. The degree of spatial variability influences on runoff simulations was related to the rainfall pattern and (i). Greater rainfall depth and instantaneous rainfall intensity corresponded to a smaller influence of the spatial variability. Stronger effects of the (i) variability on runoff simulation were found in wetter soils, while stronger effects of the K-s variability were found in drier soils. For accurate runoff simulation, the (i) variability can be completely ignored in cases of a 1-h duration storm with a return period greater than 10years, while K-s variability should be fully considered even in the case of a 1-h duration storm with a return period of 20 years. |
| 出处 | Hydrological Sciences Journal-Journal Des Sciences Hydrologiques |
| 卷 | 60 |
| 期 | 6 |
| 页 | 1137-1154 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0262-6667 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38444]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Hu W.,She, D. L.,Shao, M. A.,et al. Effects of initial soil water content and saturated hydraulic conductivity variability on small watershed runoff simulation using LISEM. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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