Dinámica de inundaciones ambientales en humedales de la Cuenca baja del Rio Grijalva: enfoque espaciotemporal a través de imágenes Landsat
[EN] The diversity of existing methodologies to define and analyze the dynamics of water surfaces demonstrates the difficulty in investigating their behavior. This is compounded by variables that complicate their delineation, such as precipitation, evapotranspiration, and their reflective behavior....
| Autores: | , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2024 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositório: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | espanhol |
| OAI Identifier: | oai:riunet.upv.es:10251/207714 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/207714 |
| Access Level: | Acceso aberto |
| Palavra-chave: | MNDWI MBWI Flood plain Probability Llanura de inundación Probabilidad |
| Resumo: | [EN] The diversity of existing methodologies to define and analyze the dynamics of water surfaces demonstrates the difficulty in investigating their behavior. This is compounded by variables that complicate their delineation, such as precipitation, evapotranspiration, and their reflective behavior. This study aimed to analyze the spatiotemporal dynamics of wetlands with high socio-environmental impact in the Lower Grijalva River Basin for the period from 1986 to 2018. For the analysis, a satellite database was integrated with 169 images from Landsat 5 and Landsat 8. Spectral indices (MNDWI and MBWI) were calculated, and thresholds characterizing water surfaces in the study area were identified. The results showed that the MBWI was superior in estimating water surfaces. Finally, maps of the spatiotemporal dynamics probabilities were generated for the wetlands of the greatest ecological and economic importance in the Lower Grijalva River Basin. These maps revealed the return periods of the expansion and longitudinal retreat processes in the wetlands and indicated that during La Niña periods, the formation of temporary wetlands could be associated with groundwater saturation rather than surface water contributions. |
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