ANÁLISE MORFOMÉTRICA E ESTIMATIVA DE ESCOAMENTO SUPERFICIAL NA BACIA DO IGARAPÉ GRANDE
ANÁLISE MORFOMÉTRICA E ESTIMATIVA DE ESCOAMENTO SUPERFICIAL NA BACIA DO IGARAPÉ GRANDE
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DOI: https://doi.org/10.22533/at.ed.8089122527114
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Palavras-chave: Hidrologia; Sensoriamento remoto; Uso e ocupação do solo; Método SCS-CN.
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Keywords: Hydrology; Remote sensing; Land use and land cover; SCS-CN method.
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Abstract: This study analyzed the hydrological dynamics of the Igarapé Grande Watershed in Porto Velho (RO), focusing on the relationship between morphometry, land use and land cover, and surface runoff. The watershed has an elongated shape, low circularity, and a compaction coefficient indicative of a low flood risk. The analysis of Landsat images from 1985 to 2020 revealed a predominance of urbanized/exposed soil areas, exceeding 65% throughout the period, reflecting intense urbanization. Vegetation areas showed a slight increase, while water bodies remained minimal.The use of remote sensing techniques, NDVI calculation, and the application of the SCS-CN method allowed for the estimation of Curve Number (CN) values and surface runoff. Most of the watershed consists of soils from hydrological groups HSG-C and HSG-C/D, with moderately high to high runoff potential. CN values remained stable, with half of the areas showing indices above 90. Areas with lower surface runoff coincide with Permanent Preservation Areas (APPs), although degraded, such as the southwestern zone of the basin. In contrast, the most urbanized neighborhoods showed the highest runoff indices. The results highlight the need for urban planning and environmental conservation to mitigate hydrological impacts and prevent flooding.
- RAIMUNDO CARNEIRO DA CONCEIÇÃO NETO
- Antonio Vinicius Salles Silva
- Cleyson Gabriel Ferreira da Silva
- Eduardo Hauck Antunes
- Illan dos Santos Sena
- Jacques Marques Carvalho
- Lucas Rocha da Silva
- Maiko Willians de Lima Nascimento