Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026988 |
Potential of a gravity‐driven film flow model to predict infiltration in a catchment for diverse soil and land cover combinations | |
D. Demand; M. Weiler | |
2021-04-16 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | Applying physically‐based models that include preferential flow (PF) is still very challenging at the catchment scale. A gravity‐driven film flow approach could be a promising concept for modeling PF as it only requires a small number of parameters. We tested if this approach can be used for different soils and land covers within a 247 km2 catchment and if we can find generalizable relationships of the film flow parameters to site or rainfall properties. We used a unique dataset from a soil moisture sensor network with 135 instrumented soil profiles in three different geologies (slate, marl, sandstone) and two land covers (forest, grassland) and fitted the film flow model to around 1700 infiltration events. The results demonstrate that the physical relationship of film flow was capable to predict wetting front velocity (v) and flow parameters from rainfall input (qs) alone. This relationship was pronounced in grassland sites but weaker for forest sites, probably due to heterogeneity of the rainfall input underneath the canopy. Incorporating the water content into the v‐qs relationship did not improve the quality, but showed that for the film flow the rainfall input and hence gravity is in fact the dominant driver and not capillarity. Furthermore, abstraction of water into the soil matrix during film flow is an important process to be included into the framework with reasonable agreements for marl and sandstone using a multiple linear regression. Film flow and corresponding functional parameter relationships for other regions could improve catchment wide PF modeling in the future. This article is protected by copyright. All rights reserved. |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/322787 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | D. Demand,M. Weiler. Potential of a gravity‐driven film flow model to predict infiltration in a catchment for diverse soil and land cover combinations[J]. Water Resources Research,2021. |
APA | D. Demand,&M. Weiler.(2021).Potential of a gravity‐driven film flow model to predict infiltration in a catchment for diverse soil and land cover combinations.Water Resources Research. |
MLA | D. Demand,et al."Potential of a gravity‐driven film flow model to predict infiltration in a catchment for diverse soil and land cover combinations".Water Resources Research (2021). |
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