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Article Dans Une Revue Water Année : 2020

Effect of Land Use/Cover Change on the Hydrological Response of a Southern Center Basin of Chile

Rebeca Martínez-Retureta
  • Fonction : Auteur
Mauricio Aguayo
  • Fonction : Auteur
Alejandra Stehr
  • Fonction : Auteur
Sabine Sauvage
Cristian Echeverría
  • Fonction : Auteur

Résumé

Several impacts over ecosystem services have been produced by land use/cover changes, placing it as one of the main factors driving global environmental change. In the present study, the SWAT model was used to assess the effect of land use/cover changes on the hydrology response in the Andalien river basin from the south-central zone of Chile. Three land use/cover scenarios (LU_1986, LU_2001, and LU_2011) were compared over a period of 30 years (1984-2013) to remove the effect of climate variability on hydrology. The results show a significant decrease in total annual flows among the three LU scenarios. The greater differences in the annual flows of 25.05 m 3 /s were observed between LU_1986 and LU_2011 scenarios. The hydrological cycle dynamics in the basin show an increasing trend of evapotranspiration and surface flows with a significant decrease in percolation and lateral flow on a monthly and seasonal scale. This behavior can be explained by the increasing percentage of the basin area covered by exotic plantations, from 35.22% to 63.93% during the period. The evidence of these changes and the evaluation of their effects are particularly relevant for the long-term sustainable management of water resources.
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hal-03009507 , version 1 (17-11-2020)

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Rebeca Martínez-Retureta, Mauricio Aguayo, Alejandra Stehr, Sabine Sauvage, Cristian Echeverría, et al.. Effect of Land Use/Cover Change on the Hydrological Response of a Southern Center Basin of Chile. Water, 2020, 12, ⟨10.3390/w12010302⟩. ⟨hal-03009507⟩

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