Assessment of the Coastal Marchica Watershed through Ecotoxicological Indices of Trace Elements in Superficial SedimentsBouchra Oujidi, Mohamed Kabriti, Mounia Tahri, Abdelfettah Bensaber, Abdelfettah Benchrif, Mostafa Layachi, Mohamed Maanan, Hocein Bazairi, Nadia Mhammdi and Maria SnoussiE3S Web Conf., 298 (2021) 03001DOI: https://doi.org/10.1051/e3sconf/202129803001