| Autor: |
Jorquera, E., Rodríguez, J. F., Baron, J. P. Quijano, Breda, A., Sandi, S., Verdon-Kidd, D., Saco, P. M. |
| Předmět: |
|
| Zdroj: |
EA National Conference Publications; 2023, p1063-1066, 4p |
| Abstrakt: |
The environmental role of coastal wetlands has been extensively acknowledged, as well as the threats that climate change induced sea-level rise and anthropogenic pressures are exerting on their survival. However, it has been shown that biological and sediment accretion can ease the effects of sea-level rise. This study presents the ecogeomorphological model of a mangrove wetland in the Republic of Fiji. The study site selected was the mangrove wetland at the mouth of the Dreketi River (northern coast of Vanua Levu - Republic of Fiji) due to its environmental relevance as part of a Ramsar site. The research involved the quantification of the sediment from the upstream catchment and the ecogeomorphological evolution of the mangrove wetland. The hydro-sedimentological contribution of the Dreketi River catchment was identified using a hydro-sedimentological, physically based watershed scale model. The results showed a good performance against sediment concentrations obtained using remote sensing products. The evolution of the mangrove wetland was simulated using an ecogeomorphological model (EGM). The model captured the present spatial distribution of suitable areas for mangrove wetlands. After 100 years of simulation under sea-level rise, a considerable reduction of the area suitable for mangroves was observed. The model demonstrated the impact of sea-level rise and sediment accretion on the wetland's evolution in the future, emphasising the significance of sediment input from the contributing catchment. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
