A combined field and numerical approach to investigate flow processes in natural macroporous soils under extreme precipitation
| Autor: | S. Scherrer, A. O. Faeh, F. Naef |
|---|---|
| Přispěvatelé: | EGU, Publication, Institute for Hydromechanics and Water Resources Management (IHW), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich) |
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere 010504 meteorology & atmospheric sciences Flood myth Macropore [SDU.OCEAN] Sciences of the Universe [physics]/Ocean Atmosphere Flow (psychology) 0207 environmental engineering [SDU.STU]Sciences of the Universe [physics]/Earth Sciences 02 engineering and technology 01 natural sciences Field (geography) Natural (archaeology) [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces environment Matrix (geology) [SDU.STU] Sciences of the Universe [physics]/Earth Sciences Environmental science Geotechnical engineering Biochemical engineering Precipitation 020701 environmental engineering Subsurface flow [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment 0105 earth and related environmental sciences |
| Zdroj: | Hydrology and Earth System Sciences Discussions Hydrology and Earth System Sciences Discussions, European Geosciences Union, 1997, 1 (4), pp.787-800 |
| ISSN: | 1812-2108 1812-2116 1607-7938 |
| Popis: | A procedure involving simultaneous experimental and numerical research is described for the purposes of understanding the mechanisms involved when extreme precipitation is transformed to flood stream discharge. It is shown that experiments and model applications by themselves are not sufficient for process identification, but that their combined application provides considerable insight into the subsurface flow processes. The proposed approach is unconventional in that a numerical model, based on stringent continuity and momentum criteria, is used as a tool for process identification only. Unlike other studies, it is not intended to demonstrate the applicability of the utilised model for general hydrological applications, or to provide evidence of the suitability of particular model simplifications. Rather, different and sometimes conflicting model realisations are used to examine the plausibility of flow processes which may occur on natural hill slopes. Hereby, small scale effects such as those relating to the mechanisms of water entry into the macropores, and the movement of water to the surrounding matrix are identified from the results of well instrumented field experiments. |
| Databáze: | OpenAIRE |
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