Urban Runoff Estimation Using Relief Attributes from Topodata Project: A Case Study in Ilha Solteira, Brazil

By José Augusto de Lollo.

Published by Spaces and Flows: An International Journal of Urban and ExtraUrban Studies

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Article: Print $US10.00
Published online: March 3, 2014 $US5.00

The paper presents a proposal for runoff estimation based on relief attributes derived from Shuttle Radar Topographic Mission (SRTM) data in urban areas, which could be useful for small communities lacking technical or financial resources. The relief data used was obtained from the Topodata Project website and included steepness, horizontal and vertical curvature, slope orientation, and landform in a 30x30 meter grid, which were combined and classified to provide preliminary potential runoff estimation. The study was applied in Ilha Solteira (Brazil) as a test of efficiency and its results were checked with local surface dynamic processes records (i.e. erosion and flood). The main result of this study was a set of charts presenting relief attribute distributions and their associations allowing the definition of preliminary runoff classes that indicate the main areas with surface water dynamic hazards. The main conclusion was that the process of combining simple relief attributes allows an efficient zoning of areas with major erosion and flood hazards. Considering its results, planning policies can be done, as well as drainage projects and other structural interventions can be proposed with low costs.

Keywords: Runoff, Shuttle Radar Topography Mission Data Urban Hazards

Spaces and Flows: An International Journal of Urban and Extraurban Studies, Volume 4, Issue 1, March 2014, pp.67-76. Article: Print (Spiral Bound). Published online: March 3, 2014 (Article: Electronic (PDF File; 1001.228KB)).

Prof. José Augusto de Lollo

Professor, Civil Engineering Department, University Estadual Paulista (UNESP), Ilha Solteira, São Paulo, Brazil

José Augusto de Lollo has studied as an engineer geologist at Universidade Federal de Ouro Preto (1987). He obtained his master's degree in Geotecnics from São Carlos Engineering School São Paulo University (1991) and his Ph.d. at São Carlos Engineering School São Paulo University (1995). He now teaches at Ilha Solteira Engineering Faculty at São Paulo State Universitya. He has experience in Geotecnics, Geosciences, and Urban Engineering, with special focus on environmental geology, acting on the following subjects: physical environments evaluation, terrain evaluation, soil collapse, engineering geological mapping, geoenvironmental mapping, environmental impacts assesment and evaluation, and natural hazards and risks.