The impact of roads on hydrological responses: A case study in Sweden
(English)Manuscript (preprint) (Other academic)
A method engaged for simulating and assessing the alterations excreted by road topography within watersheds and estimating the road effects on hydrologic responses. The method uses Geographic Information System (GIS) to allocate and eliminate roads from the elevation data. HEC-HMS was used to model surface and near surface hydrological responses of watersheds with roads and without roads in response to three storms with different intensities. A detailed study of the simulated flow duration curves showed differences between 20 watersheds for three different storms based on a digital elevation data with and without roads. To compare flow duration curves, L-moment ratios were calculated and their variation compared. An increase in peak flow and reduced delay occurred with increased storm intensity. Variations of the L-moment ratios were larger in larger watersheds. However, the impact of the roads was much smaller and only possible to identify by detailed examination of statistical descriptors. The results are useful to gain a better estimating of the effect of road topography in hydrological processes and responses especially in high storm intensities.
Road topography; HEC-HMS; Flow Duration Curves; L-moment ratios.
Other Environmental Engineering
Research subject Land and Water Resources Engineering
IdentifiersURN: urn:nbn:se:kth:diva-141353OAI: oai:DiVA.org:kth-141353DiVA: diva2:696440
QS 20142014-02-132014-02-132016-05-12Bibliographically approved