| Autor: |
Scheibel, Christopher Horvath, Nascimento, Astrogilda Batista do, Júnior, George do Nascimento Araújo, Almeida, Alexsandro Claudio dos Santos, Silva, Thieres George Freire da, Silva, José Lucas Pereira da, Junior, Francisco Bento da Silva, Farias, Josivalter Araújo de, Santos, João Pedro Alves de Souza, Oliveira-Júnior, José Francisco de, Silva, Jhon Lennon Bezerra da, João, Fernando Manuel, Deus, Alex Santos de, Teodoro, Iêdo, Oliveira, Henrique Fonseca Elias de, Silva, Marcos Vinícius da |
| Předmět: |
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| Zdroj: |
Climate (2225-1154); Sep2024, Vol. 12 Issue 9, p150, 37p |
| Abstrakt: |
Brazil, despite possessing the largest renewable freshwater reserves in the world (8.65 trillion m3 annually), faces growing challenges in water management due to increasing demand. Agriculture, responsible for 68.4% of water consumption, is one of the main drivers of this demand, especially in the São Francisco River Basin, where irrigation accounts for 81% of total water withdrawals. Water bodies play a crucial role in sustaining ecosystems and supporting life, particularly along the East-West axis of Alagoas, a water-rich region in the ENEB. This study aimed to map and quantify the spatiotemporal variations of water bodies in the ENEB region and assess the impacts of human activities using MODIS satellite data, applying hydrological indices such as NDWI, MNDWI, and AWEI. Between 2003 and 2022, significant variations in the extent of water bodies were observed, with reductions of up to 100 km2 during dry periods and expansions of up to 300 km2 during wet seasons compared to dry periods. AWEI and MNDWI proved to be the most effective indices for detecting water bodies with MODIS data, providing accurate insights into water dynamics. Additionally, the MapBiomas Rios dataset, despite being resampled from a 30 m to a 500 m resolution, offered the most accurate representation of water bodies due to its methodology for data acquisition. Changes in albedo and surface temperature were also detected, highlighting the influence of climate change on the region's water resources. These findings are crucial for guiding the sustainable management of water resources, not only in Alagoas but also in other regions of Brazil and similar semi-arid areas around the world. The study demonstrates the hydrological variability in the state of Alagoas, indicating the need for adaptive strategies to mitigate the impacts of climate change and anthropogenic pressures, supporting the need for informed decision-making in water resource management at both local and national levels. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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