TY JOUR TI Impact of Urban and Agricultural Discharges on Trace Metal Accumulation in Semi-Arid River Sediments: A Case Study of Wadi Djedra (Northeast Algeria) KW Djedra watershed KW pollution KW trace metals KW sediments KW ecological risks JO Russian Journal of Earth Sciences AU Mohammed, A.I. AU Zenati, N.. AU Nabiha, B.. AU Abdelhak, G.. PY 2026 IS 26 PB Геофизический центр Российской Академии Наук