Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020727 |
Feedbacks Between Shallow Groundwater Dynamics and Surface Topography on Runoff Generation in Flat Fields | |
Appels, Willemijn M.1,2; Bogaart, Patrick W.3,4; van der Zee, Sjoerd E. A. T. M.1,5 | |
2017-12-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands; Canada; Australia |
英文摘要 | In winter, saturation excess (SE) ponding is observed regularly in temperate lowland regions. Surface runoff dynamics are controlled by small topographical features that are unaccounted for in hydrological models. To better understand storage and routing effects of small-scale topography and their interaction with shallow groundwater under SE conditions, we developed a model of reduced complexity to investigate SE runoff generation, emphasizing feedbacks between shallow groundwater dynamics and mesotopography. The dynamic specific yield affected unsaturated zone water storage, causing rapid switches between negative and positive head and a flatter groundwater mound than predicted by analytical agrohydrological models. Accordingly, saturated areas were larger and local groundwater fluxes smaller than predicted, leading to surface runoff generation. Mesotopographic features routed water over larger distances, providing a feedback mechanism that amplified changes to the shape of the groundwater mound. This in turn enhanced runoff generation, but whether it also resulted in runoff events depended on the geometry and location of the depressions. Whereas conditions favorable to runoff generation may abound during winter, these feedbacks profoundly reduce the predictability of SE runoff: statistically identical rainfall series may result in completely different runoff generation. The model results indicate that waterlogged areas in any given rainfall event are larger than those predicted by current analytical groundwater models used for drainage design. This change in the groundwater mound extent has implications for crop growth and damage assessments. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423299000020 |
WOS关键词 | WATER-TABLE RESPONSE ; OVERLAND-FLOW ; MICRO-TOPOGRAPHY ; STREAM NETWORKS ; MODEL ; SCALE ; SOIL ; MICROTOPOGRAPHY ; APPROXIMATION ; CONNECTIVITY |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21492 |
专题 | 资源环境科学 |
作者单位 | 1.Wageningen Univ, Soil Phys & Land Management, Wageningen, Netherlands; 2.Lethbridge Coll, Ctr Technol Environm & Design, Lethbridge, AB, Canada; 3.Alterra Wageningen, Wageningen, Netherlands; 4.Stat Netherlands, The Hague, Netherlands; 5.Monash Univ, Sch Chem, Melbourne, Vic, Australia |
推荐引用方式 GB/T 7714 | Appels, Willemijn M.,Bogaart, Patrick W.,van der Zee, Sjoerd E. A. T. M.. Feedbacks Between Shallow Groundwater Dynamics and Surface Topography on Runoff Generation in Flat Fields[J]. WATER RESOURCES RESEARCH,2017,53(12). |
APA | Appels, Willemijn M.,Bogaart, Patrick W.,&van der Zee, Sjoerd E. A. T. M..(2017).Feedbacks Between Shallow Groundwater Dynamics and Surface Topography on Runoff Generation in Flat Fields.WATER RESOURCES RESEARCH,53(12). |
MLA | Appels, Willemijn M.,et al."Feedbacks Between Shallow Groundwater Dynamics and Surface Topography on Runoff Generation in Flat Fields".WATER RESOURCES RESEARCH 53.12(2017). |
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