Climate and Land Use Change Effects on Sediment Production in a Dry Tropical Forest Catchment

Understanding the natural and anthropogenic drivers that influence erosion and sediment transport is a key prerequisite for adequate management of river basins, where, especially in tropical catchments, there are few direct measurements or modeling studies. Therefore, this study analyzed the effect...

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Published in:Water (Basel) 2021-08, Vol.13 (16), p.2233
Main Authors: García Montoya, Juan Pablo, Giraldez Cervera, Juan Vicente, Vanwalleghem, Tom
Format: Article
Language:English
Subjects:
Anthropogenic factors
Catchment scale
Catchments
Climate change
El Nino
Erosion rates
Forest watersheds
Forests
Human influences
Hydrologic data
La Nina
Land use
Outlets
Rainfall
Reservoirs
River basin management
River basins
Rivers
Satellite imagery
Sediment load
Sediment transport
Soil dynamics
Soil erosion
Southern Oscillation
Tropical forests
Vegetation cover
Watershed management
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cited_by cdi_FETCH-LOGICAL-c292t-1b7adc5c1e71d1ee0faea66f20f8efca8640525b7b8242b7e9d53e0623e67a733
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creator García Montoya, Juan Pablo
Giraldez Cervera, Juan Vicente
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description Understanding the natural and anthropogenic drivers that influence erosion and sediment transport is a key prerequisite for adequate management of river basins, where, especially in tropical catchments, there are few direct measurements or modeling studies. Therefore, this study analyzed the effect of human-induced land-use changes and natural ENSO (El Niño-Southern Oscillation) related changes in rainfall patterns on soil erosion and catchment-scale sediment dynamics with the SEDD (Sediment Delivery Distributed) model. In the 393 km2 Tonusco river basin, representative of tropical, mountainous conditions, daily rainfall data were used to quantify changes in rainfall erosivity and satellite images for the evaluation of cover factor changes between 1977 and 2015. The final model combined soil loss, calculated by RUSLE, with a sediment routing-based delivery ratio, that was calibrated and validated with data from the sediment load recorded at the basin outlet. The results detected a great reduction of the vegetation cover in the catchment during the last decade of from 79.5 to 29.5%, and the influence of important runoff and erosion events linked to La Niña episodes. Soil erosion rates were locally very high, of over 120 Mg ha−1yr−1, and sediment yields were estimated at the range of 6.17–8.23 Mg ha−1yr−1.
doi_str_mv 10.3390/w13162233
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subjects Anthropogenic factors
Catchment scale
Catchments
Climate change
El Nino
Erosion rates
Forest watersheds
Forests
Human influences
Hydrologic data
La Nina
Land use
Outlets
Rainfall
Reservoirs
River basin management
River basins
Rivers
Satellite imagery
Sediment load
Sediment transport
Soil dynamics
Soil erosion
Southern Oscillation
Tropical forests
Vegetation cover
Watershed management
title Climate and Land Use Change Effects on Sediment Production in a Dry Tropical Forest Catchment
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