Assessment of gully development using geomorphic change detection between pre- and post-urbanization scenarios

摘要: Urbanization processes have caused changes in the runoff behavior, especially by impervious surfaces produced paving and buildings. Impermeable prevent infiltration of rainwater, increasing volume speed runoff. Besides, inadequate urban planning coupled with heavy rains promotes evolution erosion processes, peri-urban areas. This research aims to identify spatial patterns geomorphic change gully areas due urbanization city Jacarei (SP). The methodology has following steps: (1) elaboration Digital Elevation Model (DEM) from stereophotogrammetric techniques; (2) pre- post-urbanization DEM; (3) extraction contributing area using D-Infinity method topographic indices (topographic wetness, stream power, compound topographic); (4) calculate difference between attributes. preparation DEM used MATCH-T DSM DTMaster modules, both belonging INPHO system. Photogrammetric techniques allow generation digital models suitable for hydrological studies. exposed an evident influence on triggering erosion, evidencing increase all that develop gullies.