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| Title | A GIS-based Urban and Peri-Urban Landscape Representation Toolbox for Hydrological Distributed Modeling |
| Authors | Ximena Vargas, Pedro Sanzana, I. Braud, J. Gironás, F. Branger, F. Rodriguez, F. A. Jankowfsky, Nancy Hitschfeld, J.F. Muñoz, S. Vicuña |
| Publication date | May 2017 |
| Abstract |
Flowpaths are significantly affected by land use change and engineered elements across urban catchments. Conventional GIS-based tools for extracting drainage networks were not developed for urban terrains. This work presents Geo-PUMMA, a GIS toolbox to generate vectorial meshes for terrain representation in distributed hydrological modeling, and to extract drainage patterns in urban and peri-urban catchments. Geo-PUMMA generates well-shaped Hydrological Response Units (HRUs) and Urban Hydrological Elements (UHEs). The toolbox was used in peri-urban catchments of Chile and France to generate three model meshes with different levels of treatment, and extract and compare their corresponding drainage networks. A recommended mesh is identified, which replicates the main morphological and hydrological features of the reference drainage network, and is able to preserve features at small to medium spatial scales (~80-150 m). Overall Geo-PUMMA can be used to represent the terrain in distributed hydrological modeling applied to urban and peri-urban scales. |
| Pages | 168-185 |
| Volume | 91 |
| Journal name | Environmental Modelling & Software |
| Publisher | Elsevier Science (Amsterdam, The Netherlands) |
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