Assessing the Role of Coastal Ecosystems in Flood Reduction in Selected Communities of Rivers State

Coastal ecosystems are crucial in mitigating the impact of coastal hazards on society. However, the paucity of information about the purpose of these ecosystems in reducing floods in Rivers State, Nigeria. This study aims to assess the contribution of mangrove ecosystems in protecting coastal communities from flooding using the InVEST coastal vulnerability model (version 3.10.2). The model analyzes various data inputs and assigns relative numbers, ranging from 1 to 5, indicating different levels of exposure. Data on population, bathymetry, shoreline type, land use land cover, and continental shelf were obtained from relevant websites and the InVEST model package. The findings indicate that the mangrove ecosystems in River State offer minimal protection against coastal flooding due to their degraded state caused by oil spills and over-exploitation. Additionally, sandy beaches provide little to no protection, and the socio-economic conditions in the communities contribute to increased vulnerability to flooding. The study recommends awareness programs to educate the public about the importance of mangroves for coastal protection in addition to their conservation and restoration.