ABSTRACT
While we generally have a fundamental understanding of the dominant hydrological processes in the Blue Nile Basin, efforts to model it are largely based on temperate climate hydrology. Hydrology in the Blue Nile Basin is driven by monsoonal climate, characterized by prolonged wet and dry phases, where run-off increases as the rainy season (which is also the growing season) progresses. In temperate climates, run-off typically decreases during the growing season as plants remove soil moisture. In the Blue Nile Basin there is a threshold precipitation level needed to satisfy soil-moisture capacity (approximately 500 mm) before the basin begins to generate run-off and flow.
