Effects of Grassland Afforestation on Water Yield in Basins of Uruguay: A Spatio-Temporal Analysis of Historical Trends Using Remote Sensing and Field Measurements
Effects of Grassland Afforestation on Water Yield in Basins of Uruguay: A Spatio-Temporal Analysis of Historical Trends Using Remote Sensing and Field Measurements
Authors
Cano, Deyvis
Cacciuttolo, Carlos
Custodio, Maria
Nosetto, Marcelo
Cacciuttolo, Carlos
Custodio, Maria
Nosetto, Marcelo
Profesor GuĆa
Authors
Date
Datos de publicaciĆ³n:
10.3390/land12010185
LAND,Vol.12,,2023
LAND,Vol.12,,2023
Tipo de recurso
Article
Keywords
Materia geogrƔfica
Collections
Abstract
The afforestation of grasslands can alter different ecosystems' functional processes; it affects the water balance due to the high water demand, caused by the increased productivity of the plantations, increase evapotranspiration, and reduces base flow of the basins. In Uruguay, there are two scenarios; the headwaters of the Tacuarembo River, where the area of plantations has increased for more than 30 years, and the headwaters of the Rio Negro, where mainly grasslands are preserved without significant changes. This article evaluates the dynamics of grassland afforestation in the two basins, through the spatial and temporal analysis of historical trends with the use of remote sensors and considering the effect on water yield through field measurements, in the period 1984-2014. The spatial analysis shows an increase in the area of the forested basin, and the temporal analysis shows a reduction in the runoff coefficient due to the effect of the afforestation of pastures. Therefore, the movement from grassland to forest plantations reduces water flow considerably; this was identified through base flow measurements in the field with the integration of remote sensors. This allowed the observation of the relevant changes in the two basins studied, which may be related to climate change and human activities.