GENERATION OF A TOPOBATHYMETRIC DIGITAL ELEVATION MODEL OF URBAN STREAMS: A STUDY CASE IN THE SÃO PAULO METROPOLITAN REGION, BRAZIL

Flooding represents a source of hazards for both developed and developing countries. Such events have been causing serious socioeconomic and environmental damage worldwide. Therefore, studies that characterize the features of rivers channels are essential for flood modeling. In this work, we performed topobathymetric surveys along stretches of three rivers in São Paulo Metropolitan Region, Brazil. Bathymetric sample points were collected every 50 m, and cross-sections surveys were performed every 200 m. In general, the topobathymetric digital elevation model (TBDEM) presents satisfactory results. Lastly, the product generated in this work will be merged into a digital terrain model (DTM) with a spatial resolution of 0.5 m, which in turn, will be made available for future urban flood modeling experiments in the study area