Seasonal fluxes and sediment routing in tropical catchments affected by nickel mining

Autor: Bryne T. Ngwenya, J. P. T. Domingo, Simon M. Mudd, Mikael Attal, Carlos Primo C. David
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Domingo, J, Attal, M, Mudd, S, Ngwenya, B & David, C P 2021, ' Seasonal fluxes and sediment routing in tropical catchments affected by nickel mining ', Earth Surface Processes and Landforms, vol. 46, no. 13, pp. 2632-2655 . https://doi.org/10.1002/esp.5198
DOI: 10.1002/esp.5198
Popis: An important gap in the management of land erosion in mining-affected areas is the understanding of the entire sediment routing system and the links between sources and storage at the catchment scale. In this study, we examine sediment delivery and its seasonality in the nickel mining-affected Santa Cruz and Pamalabawan catchments, in the Philippines. We monitored discharge, suspended sediment concentrations and suspended sediment loads across 13 sub-catchments with contrasting degrees of mining influence from June 2018 to July 2019. First, we show the importance of the size of the area that has been physically disturbed within our sub-catchments, with as little as 10-22% of relative disturbance area being enough to generate fourfold to eightfold increase in the sediment yield relative to less disturbed and pristine areas. We found that sub-catchments with >10% disturbance exhibit the highest sediment yields (15.5 ± 44.7 t km-2 d-1) compared with sub-catchments with
Databáze: OpenAIRE