The explanation comes amid concerns over the effectiveness of Banjul’s drainage system following widespread flooding in several parts of the capital. According to the source, drainage systems are generally designed using rainfall averages and projections over a given period. The source warned that insufficient capacity could result in what is technically known as “surcharging,” where the drainage system becomes overwhelmed and water is pushed back into surrounding areas. We need to clear the outlets and the drainage system to make sure that it flows properly,” the source said. The source added that adequate capacity in the Bond Polder is essential to prevent the system from surcharging and creating further flooding.