Authors
Samuel Owusu Ansah, Yakob Umer, Thompson Annor, Andrew Manoba Limantol, Isaac Larbi, Babatunde Abiodun, Joshua Asamoah, Alfred Awuah, Meron Teferi Taye
Published in
Water science and technology : a journal of the International Association on Water Pollution Research. Volume 94. Issue 1. Pages 123-147. Epub Jun 18, 2026.
Abstract
Flooding is a major natural hazard in Ghana, with the White Volta Basin (WVB) highly susceptible due to flat terrain, intense rainfall, and upstream dam releases. The September 2020 flood, caused by heavy rainfall and Bagre Dam spillage, inundated croplands and settlements, revealing the need for impact-based flood intelligence. This study uses the Hydrologic Engineering Center's River Analysis System to simulate flood dynamics and assess cropland exposure. Calibration and validation with Sentinel-1 Synthetic Aperture Radar-derived flood extent showed strong spatial agreement (61-77%). A composite flood hazard index, combining water depth and velocity, classified hazard intensity into seven levels, linking hydraulic severity with crop impacts. The framework guides community-level early warning and preparedness, supporting decision-making by the National Disaster Management Organization (NADMO), Ministry of Food and Agriculture (MoFA), Water Resources Commission (WRC), and Ghana Meteorological Agency (GMet). High-risk areas included Bawku West (22.7%), Binduri (15.1%), and Talensi (6.1%), aiding climate-resilient planning in transboundary basins.
PMID:
42460562
Bibliographic data and abstract were imported from PubMed on 16 Jul 2026.
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