Year: 2015
Type: article
Abstract: This paper aims at determining distances relative to river drainage networks considering the hydrologic connectivity established by flow paths, as well as qualitatively and quantitatively assessing the differences of such distances in comparison to Euclidian distances. Tapajos watershed is considered as study case. SRTM-DEM was used, but resampled to a spatial resolution of 0.002°, and processed to obtain flow directions, flow accumulated area, river drainage network and distance relative to drainage network. The distances calculated considering the flow paths reached up to 36 km, while the distances calculated using the Euclidian approach were smaller than 16 km. The spatial distribution of both results also highlight the larger distances obtained through the flow paths calculation approach. Therefore, for studies that need to map and quantify the region located inside a certain distance buffer measured from the drainage network, the choice of which approach should be used may significantly alter the results and consequently the rest of the analysis.
Authors: Sousa, Thâmara Martins Ismael de, Saraiva, Alzira Gabrielle Soares, Paz, Adriano Rolim da
Institution: Universidade Federal da Paraíba
Language: English
Subfield: Environmental Engineering
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7037225386