Soil erosion assessment using the RUSLE model for better planning: a case study from Morocco

Wise decisions depend on accurate and up-to-date scientific guidance. The ability to react, the accuracy, and the effectiveness of the measures adopted depend on it, particularly in the face of insurmountable structural risks. Among them, soil erosion is a persistent problem that generates so much damage and all indications are that it will continue to do so almost everywhere, including in Morocco. There, the three identified knowledge gaps have been addressed in this article: (i) spatially assess magnitude across regions, (ii) identify key drivers, and (iii) periodically update plans to maintain land productivity and infrastructure. Through the RUSLE model, it was found in the mountainous watershed of Nekor (in the North) an average rate of 37.8 t/ha/year of soil losses, which equates to a massive gross amount of 3.8 kg/m(2)/year. The highest erosion rates are observed upstream in the hills and high mountains. The rugged topography and aggressive precipitation are the two main factors that accentuate erosion processes. It is anticipated that updating the plans is thwarted by several constraints that need to be addressed through sound planning that benefits from research and co-creation for better mitigation, preparedness, and response.