Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system
As a part of the GrönNano project at Luleå University of Technology, a sustainable drainage system, composed of infiltration surfaces and a wale,has been subject to hydrological measurements and modeling. The aim of this study was to identify the conditions under which it is possible to model the hy...
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2015
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ftulundlupsp:oai:lup-student-papers.lub.lu.se:7758021 2023-07-30T04:04:48+02:00 Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system Gunnarsson, Karl 2015 application/pdf http://lup.lub.lu.se/student-papers/record/7758021 eng eng Lunds universitet/Avdelningen för Teknisk vattenresurslära Lunds universitet/Ekosystemteknik (CI) http://lup.lub.lu.se/student-papers/record/7758021 ISSN: 1101-9824 infiltration modeling MIKE 21 rainfall-runoff modeling SUDS urban hydrology Technology and Engineering H3 2015 ftulundlupsp 2023-07-11T20:07:20Z As a part of the GrönNano project at Luleå University of Technology, a sustainable drainage system, composed of infiltration surfaces and a wale,has been subject to hydrological measurements and modeling. The aim of this study was to identify the conditions under which it is possible to model the hydrological processes of that system adequately, using the two-dimensional hydrodynamic modeling software MIKE 21 equipped with an infiltration and leakage module. To achieve this, a model was set up with site-specific data followed by sensitivity analyses, calibration, validation and finally evaluation against a corresponding model, set up in the integrated hydrological modeling system MIKE SHE. From a sensitivity analysis it was indicated that too large time steps may introduce undesired volume losses when using the infiltration and leakage module. As a consequence, along with limitations of the simple infiltration model, this module and its principles were questioned and recommended to be treated with great care in inland applications. A second sensitivity analysis showed that hydraulic roughness associated with the swale is of great importance. Based on this, a proper two-dimensional representation of the swale was considered to be a critical point for predicting discharge correctly. Therefore it is of interest to further examine the influence on this, of for example the model grid resolution. The MIKE 21 model was successfully calibrated for a selected rainfall event but could not be fully validated for a following longer period. Nor could the model be satisfactorily evaluated against the preliminary version of the MIKE SHE model. However, from this it could be concluded that there were great uncertainties in the accuracy of rainfall and calibration data. Infiltration modeling – A complement to a proven rainfall-runoff model for urban stormwater management. The global situation of extensive urbanization and climate changes demands innovative approaches for implementing sustainable drainage systems (SUDS) in ... Other/Unknown Material Luleå Luleå Luleå Lund University Publications Student Papers (LUP-SP) |
institution |
Open Polar |
collection |
Lund University Publications Student Papers (LUP-SP) |
op_collection_id |
ftulundlupsp |
language |
English |
topic |
infiltration modeling MIKE 21 rainfall-runoff modeling SUDS urban hydrology Technology and Engineering |
spellingShingle |
infiltration modeling MIKE 21 rainfall-runoff modeling SUDS urban hydrology Technology and Engineering Gunnarsson, Karl Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system |
topic_facet |
infiltration modeling MIKE 21 rainfall-runoff modeling SUDS urban hydrology Technology and Engineering |
description |
As a part of the GrönNano project at Luleå University of Technology, a sustainable drainage system, composed of infiltration surfaces and a wale,has been subject to hydrological measurements and modeling. The aim of this study was to identify the conditions under which it is possible to model the hydrological processes of that system adequately, using the two-dimensional hydrodynamic modeling software MIKE 21 equipped with an infiltration and leakage module. To achieve this, a model was set up with site-specific data followed by sensitivity analyses, calibration, validation and finally evaluation against a corresponding model, set up in the integrated hydrological modeling system MIKE SHE. From a sensitivity analysis it was indicated that too large time steps may introduce undesired volume losses when using the infiltration and leakage module. As a consequence, along with limitations of the simple infiltration model, this module and its principles were questioned and recommended to be treated with great care in inland applications. A second sensitivity analysis showed that hydraulic roughness associated with the swale is of great importance. Based on this, a proper two-dimensional representation of the swale was considered to be a critical point for predicting discharge correctly. Therefore it is of interest to further examine the influence on this, of for example the model grid resolution. The MIKE 21 model was successfully calibrated for a selected rainfall event but could not be fully validated for a following longer period. Nor could the model be satisfactorily evaluated against the preliminary version of the MIKE SHE model. However, from this it could be concluded that there were great uncertainties in the accuracy of rainfall and calibration data. Infiltration modeling – A complement to a proven rainfall-runoff model for urban stormwater management. The global situation of extensive urbanization and climate changes demands innovative approaches for implementing sustainable drainage systems (SUDS) in ... |
format |
Other/Unknown Material |
author |
Gunnarsson, Karl |
author_facet |
Gunnarsson, Karl |
author_sort |
Gunnarsson, Karl |
title |
Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system |
title_short |
Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system |
title_full |
Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system |
title_fullStr |
Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system |
title_full_unstemmed |
Two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system |
title_sort |
two-dimensional hydrodynamic modeling of overland flow and infiltration in a sustainable drainage system |
publisher |
Lunds universitet/Avdelningen för Teknisk vattenresurslära |
publishDate |
2015 |
url |
http://lup.lub.lu.se/student-papers/record/7758021 |
genre |
Luleå Luleå Luleå |
genre_facet |
Luleå Luleå Luleå |
op_relation |
http://lup.lub.lu.se/student-papers/record/7758021 ISSN: 1101-9824 |
_version_ |
1772816389878317056 |