Repositorio
Institucional

Galleguillos, Mauricio

Gimeno, F.

Manuschevich, D.

Zambrano-Bigiarini, M.

A coupled modeling approach to assess the effect of forest policies in water provision: A biophysical evaluation of a drought-prone rural catchment in south-central Chile

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SCIENCE OF THE TOTAL ENVIRONMENT

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The effect of different forest conservation policies on water provision has been poorly investigated due to a lack of an integrative methodological framework that enables its quantification. We developed a method for assessing the effects of forest conservation policies on water provision for rural inhabitants, based on a land-use model coupled with an ecohydrological model. We used as a case study the Lumaco catchment, Chile, a territory dominated by native forests (NF) and non-native tree farms, with an extended dry period where nearly 12,600 people of rural communities get drinking water through water trucks. We analyzed three land-use policy scenarios: i) a baseline scenario based on historical land-cover maps, ii) a NF Recovery and Protection (NFRP) scenario, based on an earlier implementation of the first NF Recovery and Forestry Development bill, and iii) a Pristine (PR) scenario, based on potential vegetation belts, the latter two based on Dyna CLUE, and simulated between 1990 and 2015. Impacts on water provision from each scenario were computed with SWAT. The NFRP scenario resulted in an increase of 6974 ha of NF regarding the baseline situation, and the PR scenario showed an increase of 26,939 ha of NF. Despite large differences in NF areas, slight increases in inflows (Q) were found between the NFRP and the PR scenarios, with relative differences with respect to the baseline of 0.3% and 2.5% for NFRP and PR, respectively. Notwithstanding, these small differences in the NFRP scenario, they become larger if we analyze the cumulative values during the dry season only (December, January, and & nbsp,February), where they reach 1.1% in a normal year and 3.1% in a dry year. Flows increases were transformed into water truck costs resulting in up to 441,876 USD (monthly) of fiscal spending that could be avoided during a dry period.

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This research was funded by the Center for Climate and Resilience Research (CR2, CONICYT/FONDAP/15110009) and PCI CONICYT Chile NSFC China NSFC190018: "Management of global change impacts on hydrological extremes by coupling remote sensing data and an interdisciplinary modeling approach" (Chi)2. This work is also a contribution to the TanDEM-X DEM GEOL0845 project.

Esta investigación fue financiada por el Centro de Investigación sobre Clima y Resiliencia (CR2, CONICYT/FONDAP/15110009) y PCI CONICYT Chile NSFC China NSFC190018: "Gestión de los impactos del cambio global en extremos hidrológicos mediante el acoplamiento de datos de teledetección y un enfoque de modelado interdisciplinario" ( Chi)2. Este trabajo también es una contribución al proyecto TanDEM-X DEM GEOL0845.

10.1016/j.scitotenv.2022.154608

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Hydrological model

Land-use model

Policy environmental assessment

Remote sensing

LAND-USE CHANGES

EUCALYPTUS-GLOBULUS PLANTATIONS

BALANCE SSEBOP MODEL

NATIVE FORESTS

PINUS-RADIATA

EXOTIC PLANTATIONS

SWAT

CALIBRATION

CLIMATE

CONSERVATION

Ciencias Ambientales

Modelo hidrológico

Modelo de uso de la tierra

Evaluación ambiental de políticas

Teledetección

CAMBIOS DE USO DE LA TIERRA

PLANTACIONES DE EUCALYPTUS-GLOBULUS

MODELO SSEBOP DE BALANCE

BOSQUES NATIVOS

PINUS-RADIATA

PLANTACIONES EXÓTICAS

SWAT

CALIBRACIÓN

CLIMA

CONSERVACIÓN

A coupled modeling approach to assess the effect of forest policies in water provision: A biophysical evaluation of a drought-prone rural catchment in south-central Chile

artículo original

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metadata

metadata

CONICYT-FONDAP 15110009

CONICYT NSFC190018

WOS:000794864500001