Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations

SUMMARY: Fingerprinting techniques were incorporated into a paired catchment investigation in southern Chile to quantify the contribution of three fine sediment sources (catchment surfaces, forest roads and stream channels) to catchment suspended sediment yields during forest harvesting and replanti...

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Autores principales:	Schuller,Paulina, Walling,Desmond E, Iroumé,Andrés, Quilodrán,César, Castillo,Alejandra
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2021
Materias:	sediment source contribution forest operations source fingerprinting paired catchments southern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002021000200231
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spelling	oai:scielo:S0717-920020210002002312021-10-08Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operationsSchuller,PaulinaWalling,Desmond EIroumé,AndrésQuilodrán,CésarCastillo,Alejandra sediment source contribution forest operations source fingerprinting paired catchments southern Chile SUMMARY: Fingerprinting techniques were incorporated into a paired catchment investigation in southern Chile to quantify the contribution of three fine sediment sources (catchment surfaces, forest roads and stream channels) to catchment suspended sediment yields during forest harvesting and replanting operations. Optimum composite fingerprints for use in sediment source discrimination and apportionment comprised 137Cs and 210Pbex for the control catchment (LUC) throughout the study and for the treatment catchment (LUT) during the pre-harvest period, and 137Cs and soil organic matter during harvest and post-harvest periods for LUT. Prior to harvesting, the dominant sediment source to the sediment load in both catchments was the stream channel and remained relatively constant throughout the study for LUC. For the entire study period the total suspended sediment yield from LUT (3,160 kg ha-1) approximately doubled that from LUC (1,650 kg ha-1). Most of this difference is accounted for by the increase in sediment output during the rainy months following clearcutting. The disturbance associated with forest operations in LUT caused the contributions to the load from the catchment slopes and forest roads to increase markedly (total contributions 835 and 795 kg ha-1, respectively). However, the total contribution from the stream channel for LUT during the study period (1,530 kg ha-1) remained similar to that from LUC. The results of the investigation demonstrated that any attempt to reduce sediment loading from forest harvesting would require adopting best management practices to reduce sediment mobilization from catchment surfaces and forest roads.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.42 n.2 20212021-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002021000200231en10.4067/S0717-92002021000200231
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	sediment source contribution forest operations source fingerprinting paired catchments southern Chile
spellingShingle	sediment source contribution forest operations source fingerprinting paired catchments southern Chile Schuller,Paulina Walling,Desmond E Iroumé,Andrés Quilodrán,César Castillo,Alejandra Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations
description	SUMMARY: Fingerprinting techniques were incorporated into a paired catchment investigation in southern Chile to quantify the contribution of three fine sediment sources (catchment surfaces, forest roads and stream channels) to catchment suspended sediment yields during forest harvesting and replanting operations. Optimum composite fingerprints for use in sediment source discrimination and apportionment comprised 137Cs and 210Pbex for the control catchment (LUC) throughout the study and for the treatment catchment (LUT) during the pre-harvest period, and 137Cs and soil organic matter during harvest and post-harvest periods for LUT. Prior to harvesting, the dominant sediment source to the sediment load in both catchments was the stream channel and remained relatively constant throughout the study for LUC. For the entire study period the total suspended sediment yield from LUT (3,160 kg ha-1) approximately doubled that from LUC (1,650 kg ha-1). Most of this difference is accounted for by the increase in sediment output during the rainy months following clearcutting. The disturbance associated with forest operations in LUT caused the contributions to the load from the catchment slopes and forest roads to increase markedly (total contributions 835 and 795 kg ha-1, respectively). However, the total contribution from the stream channel for LUT during the study period (1,530 kg ha-1) remained similar to that from LUC. The results of the investigation demonstrated that any attempt to reduce sediment loading from forest harvesting would require adopting best management practices to reduce sediment mobilization from catchment surfaces and forest roads.
author	Schuller,Paulina Walling,Desmond E Iroumé,Andrés Quilodrán,César Castillo,Alejandra
author_facet	Schuller,Paulina Walling,Desmond E Iroumé,Andrés Quilodrán,César Castillo,Alejandra
author_sort	Schuller,Paulina
title	Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations
title_short	Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations
title_full	Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations
title_fullStr	Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations
title_full_unstemmed	Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations
title_sort	quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from chilean forested catchments during harvesting operations
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002021000200231
work_keys_str_mv	AT schullerpaulina quantifyingthetemporalvariationofthecontributionoffinesedimentsourcestosedimentyieldsfromchileanforestedcatchmentsduringharvestingoperations AT wallingdesmonde quantifyingthetemporalvariationofthecontributionoffinesedimentsourcestosedimentyieldsfromchileanforestedcatchmentsduringharvestingoperations AT iroumeandres quantifyingthetemporalvariationofthecontributionoffinesedimentsourcestosedimentyieldsfromchileanforestedcatchmentsduringharvestingoperations AT quilodrancesar quantifyingthetemporalvariationofthecontributionoffinesedimentsourcestosedimentyieldsfromchileanforestedcatchmentsduringharvestingoperations AT castilloalejandra quantifyingthetemporalvariationofthecontributionoffinesedimentsourcestosedimentyieldsfromchileanforestedcatchmentsduringharvestingoperations
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Quantifying the temporal variation of the contribution of fine sediment sources to sediment yields from Chilean forested catchments during harvesting operations

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