The role of rainwater harvesting in mitigating floods and siltation

The issue of dam siltation caused by erosion is one of the challenges faced in water management in Morocco. Significant advances in hydrological modelling have led to the availability of several tools if datasets can be collected. For rainwater harvesting, the STORM model [Sieker and Sieker, 20091] is one such example. Nevertheless, for rainwater harvesting in rural areas, STORM has limitations. Within STORM, rural works to a small retention pond have been assimilated, allowing for the simulation of the impact of furrows resulting, for example, from the Vallerani technique, which works for flood mitigation and sediment transport, as well as dam siltation. The results offer encouragement for developng these techniques further to simulate impacts on the development of water resources, taking into account sustainable development and the impact of climate change, and to design appropriate adaptation methods for vulnerable populations.