Geospatial analysis and streets flooding points density mapping in São Paulo county, Brazil

Author(s)

Talytha Accioly Simões Coelho

• Document type: Master's Dissertation
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Instituto de Geociências
• Defense date: 2016-11-22

Examining board members

Marcos César Ferreira; Lindon Fonseca Matias; Sergio dos Anjos Ferreira Pinto

• Advisor: Marcos César Ferreira

Abstract

Growth of urban areas and the population migration to cities, occurred in the last century, resulted in the increase of space needs and unregulated occupation of urban land. As a result, some natural events have intensified due to the change in the relationship between rain infiltration, river flows and changes in the original characteristics of the water bodies. The Sao Paulo municipality, which has one of the largest urban areas in the world, has often suffered large flood events and affected large populous areas. The aims of this research was to map the spatial density of flooding sites recorded by the Sao Paulo Emergency Management Center, from 2008 to 2013, and evaluate the correspondence between the higher flooding density sites, land use and urban hydrography, by municipal districts. The spatial density was mapped using the kernel density estimator, available in Quantum GIS and ArcGIS packages. The results showed that the highest flooding sites density districts show heterogeneous urban use areas and different social strata of the population. The highest flooding sites density were reported in Vila Leopoldina, Jaguare Itaim Bibi, Pinheiros, Carrao, Barra Funda, Santa Cecilia and Bela Vista districts. The spatial density of flooding sites on Sao Paulo streets was influenced by urban rainfall, changes in the natural river network patterns, land occupation in floodplains of major rivers and geomorphological characteristics of the urban site (AU)

• FAPESP's process: 14/21948-5 - Geospatial analysis and modeling of flood risk areas in the São Paulo City
• Grantee: Talytha Accioly Simões Coelho
• Support Opportunities: Scholarships in Brazil - Master