The researchers estimated the amount of water flowing in the Aboine River Basin in Nigeria using a modified method based on the climate. They found that the basin has a low amount of surface runoff and mostly flat terrain. This affects how much water is available for projects and how the environment controls the flow of water. By comparing their estimates with actual measurements, they saw differences in the amount of water flowing in the river. This suggests that their modified method could be useful for understanding the water balance in the basin when there is no direct data available.