Spatio-temporal suspended sediment fingerprinting under different land management practices |
| |
| Affiliation: | 1. Department of Watershed Management Engineering, Faculty of Natural Resources, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran;2. Department of Geography, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland;3. Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran;4. Department of Forestry, Faculty of Natural Resources, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran;1. Department of Earth Sciences, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon;2. University Institute of Technology, University of Douala, P.O. Box 8698, Douala, Cameroon;3. Department of Mining and Mineral Engineering, National Higher Polytechnic Institute, University of Bamenda, P.O. Box 39, Bambili, Cameroon;4. Department of Soil Science, Faculty of Agronomy and Agricultural Sciences, University of Dschang, P.O. Box 222, Dschang, Cameroon;5. Department of Mining and Geology, School of Geology and Mining Engineering, University of Ngaoundere, P.O. Box 115, Meiganga, Cameroon;1. Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México C. P. 52750, Mexico;2. CONACyT – Instituto Nacional de Investigaciones Nucleares, La Marquesa, Ocoyoacac, Estado de México, Mexico;1. Institute of Hydrology, Slovak Academy of Sciences, Dúbravská Cesta 9, 84104, Bratislava, Slovak Republic;2. Department of Water Engineering, College of Agriculture, Bu-Ali Sina University, 65178-38695, Hamadan, Iran;3. Departamento de Engenharia Civil, Faculdadede Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal;4. CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, 4450-208, Matosinhos, Portugal;1. Department of Civil Engineering, Indian Institute of Technology, Roorkee, 247667, India;2. Department of Civil Engineering, National Institute of Technology, Kurukshetra, 136119, India |
| |
| Abstract: | Understanding spatio-temporal suspended sediment dynamics is more important in large watersheds due to the decisive role of local source apportionment in sediment transport and yield. The Talar River with a large mountainous watershed in northern Iran, which plays a vital role in water supply for agriculture and drinking, recently has faced quality degradation. The current study explores the relative contribution of suspended sediment sources using geochemical tracers and fingerprinting techniques in high and low flow periods along this river. Soil samples were collected from four major land uses including rangeland, forest, rainfed agriculture, and irrigated agriculture, as well as riverbanks and riparian zones along the main river. Furthermore, suspended sediment was sampled at four sampling points along the main river in two seasons. Land use apportionment in suspended sediment yield was calculated using an unmixing model included in a newly developed package (FingerPro) in high flow and low flow, separately. The fingerprinting results showed a highly spatio-temporal dynamic for sediment source contribution along the main river in high and low flow periods. Natural land uses (forest and rangeland) in upstream reaches and agricultural land uses and riverbank sources in downstream reaches showed higher contributions to suspended sediment yield. The mean contribution of various land uses for both high and low flow periods indicated substantial contributions from forest (34%–41%) and riverbanks (31%–33%). The significant difference in sediment geochemical properties for the two flow seasons highlights the important role of the prevailing climatic-hydrologic condition on river sediment. Moreover, this issue indicates that sediment source contributions and transfer mechanisms are highly dynamic in Talar River watershed. The current study outcomes provide essential knowledge to create a robust strategy for mitigation of river sediment pollution. |
| |
| Keywords: | Land use River water quality Sediment fingerprinting Sustainability Unmixing model |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
