Hillslope-scale probabilistic characterization of soil moisture dynamics and average water balance
文献类型：SCI/SSCI论文
| 作者 | Xia J.; Zhang L.; Zhang L. |
| 发表日期 | 2013 |
| 关键词 | probabilistic ecohydrological model variable source area runoff soil moisture dynamics water balance runoff generation controlled ecosystems hydrologic processes active-role climate vegetation runoff model ecohydrology australia rainfall |
| 英文摘要 | Probabilistic water balance modelling provides a useful framework for investigating the interactions between soil, vegetation, and the atmosphere. It has been used to estimate temporal soil moisture dynamics and ecohydrological responses at a point. This study combines a nonlinear rainfallrunoff theory with probabilistic water balance model to represent varied source area runoff as a function of rainfall depth and a runoff coefficient at hillslope scale. Analytical solutions of the soil-moisture probability density function and average water balance model are then developed. Based on a sensitivity analysis of soil moisture dynamics, we show that when varied source area runoff is incorporated, mean soil moisture is always lower and total runoff higher, compared with the original probabilistic water balance model. The increased runoff from the inclusion of varied source area runoff is mainly because of a reduction in leakage when the index of dryness is less than one and evapotranspiration when the index of dryness is greater than one. Inclusion of varied source area runoff in the model means that the actual evapotranspiration is limited by less available water (i.e. water limit), which is stricter than Budyko's and Milly's water limit. Application of the model to a catchment located in Western Australia showed that the method can predict annual value of actual evapotranspiration and streamflow accurately. Copyright (c) 2012 John Wiley & Sons, Ltd. |
| 出处 | Hydrological Processes |
| 卷 | 27 |
| 期 | 10 |
| 页 | 1464-1474 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1099-1085 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30323]  |
| 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 | Xia J.,Zhang L.,Zhang L.. Hillslope-scale probabilistic characterization of soil moisture dynamics and average water balance. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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