Assessment of land cover change on the hydrology of a Brazilian headwater watershed using the Distributed Hydrology-Soil-Vegetation Model

Alvarenga, Lívia Alves; Mello, Carlos Rogério de; Colombo, Alberto; Cuartas, Luz Adriana; Bowling, L. C.

doi:10.1016/j.catena.2016.04.001

Cited by 73 publications

(36 citation statements)

References 38 publications

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“…All soil and vegetation parameters were based on literature (e.g. Ávila et al, 2014;Cuartas et al, 2012;Junqueira Junior et al, 2008;Vail;Lettenmaier, 1994) and details can be found in Alvarenga et al (2016).…”

Section: Input Data For Dhsvmmentioning

confidence: 99%

Hydrological responses to climate changes in a headwater watershed

et al. 2016

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Climate change impacts need to be considered in water resource planning. This work aims to study of the impacts climate change on Lavrinha headwater watershed, located in the Mantiqueira Range, southeastern Brazil. The impacts from climate change (RCP 8.5 scenario) in the Lavrinha watershed runoff were analyzed based on the "Distributed Hydrology Soil Vegetation Model" (DHSVM), forced with the climate simulated for this future climate change scenario. These simulations, in turn, were generated by the Eta regional climate model coupled to Global Climate Model (GCM) HadGEM2-ES for the 2011-2040, 2041-2070 and 2071-2099 periods. The results of this study showed that the runoff is very sensitive to rising temperatures and reduced precipitation, both projected for the RCP 8.5 scenario. The hydrological simulation projected a reduction in the monthly streamflow between 20 and 77% over the twenty-first century , corresponding to drastic reductions in the runoff behavior and consequently in the water production capacity of the region.Index terms: Downscaling; Eta model; DHSVM; hydrological impacts. RESUMOO impacto das mudanças climáticas precisa ser considerado no planejamento dos recursos hídricos. Este trabalho tem por objetivo o estudo dos impactos das mudanças climáticas na bacia de cabeceira Lavrinha, localizada na Serra da Mantiqueira, Sudeste do Brasil. Os impactos oriundos das mudanças climáticas (cenário RCP 8.5) no escoamento da bacia hidrográfica Lavrinha foram analisados com base no modelo "Distributed Hydrology Soil Vegetation Model" (DHSVM), forçado com as condições climáticas simuladas para este cenário futuro de mudanças climáticas. Estas simulações, por sua vez, foram geradas pelo modelo climático regional Eta acoplado ao Modelo Climático Global (MCG) HadGEM2-ES, nos períodos de 2011-2040, 2041-2070 e 2071-2099. Os resultados deste estudo mostraram que a vazão é bastante sensível ao aumento da temperatura e diminuição da precipitação, ambos projetados para o cenário RCP 8.5. A simulação hidrológica projetou uma redução na vazão mensal entre 20 e 77% ao longo do século XXI (2011 a 2099), correspondendo a reduções drásticas no escoamento e, consequentemente, na capacidade de produção de água da região.Termos para indexação: Downscaling; modelo Eta; DHSVM; impactos hidrológicos.

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Section: Input Data For Dhsvmmentioning

confidence: 99%

Hydrological responses to climate changes in a headwater watershed

et al. 2016

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“…It has been demonstrated that upper montane forests catchments with minimal land cover disturbance will function to store water in subsurface and ground systems due to their ability to infiltrate water, and attenuate rainfall intense due to having good soil physical properties (Alvarenga et al, 2016;Ávila et al, 2014;Menezes et al, 2009;Pinto et al, 2015a;, like high soil drainable porosity. On the contrary, highly disturbed montane catchments that have been submitted to minimal conservation practices can present reduced ability for water infiltration leading to increased overland flow.…”

Section: Pinto L C Et Almentioning

confidence: 99%

“…These types of land-use produce more overland flow than forested areas because cultivated soils and pasture tend to suffer more physical degradation, thus affecting their infiltration capacity. Alvarenga et al (2016) evaluated the effects of land cover changes on the LCW hydrology using the Distributed Hydrology-Soil-Vegetation Model (DHSVM), analyzing the effects of hypothetical land-use change scenarios on the hydrological cycle. This study suggested that high and low flows regimes are affected by land cover scenario changes.…”

Section: Validation From Hydrological Point Of Viewmentioning

confidence: 99%

Land-use effect on hydropedology in a mountainous region of Southeastern Brazil

et al. 2017

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In Brazil, the Mantiqueira Range, southeastern region, shelters the last remnants of the ecologically important Upper Montane Tropical Forest. since extensive exploration that has been taking place in this biome for decades, the influence of land-use changes on hydropedology in these areas must be investigated once major land-use changes have been observed. This study aims to evaluate the land-use influence on soil drainable porosity (SDP) in a headwater watershed located in the Mantiqueira Range region, and to validate the proposed methods based on micromorphological and hydrological indicators. The native vegetation of the study area is Atlantic forest that occupies 62% of the area, and the remaining 38% has been used for pasture. Thirty nine combinations of environmental variables were tested, each one generating a map for predicting SDP. The performance of the spatial prediction of SDP was assessed using 20% of the data from the total number of samples collected throughout the watershed. The least values of SDP are due to the process of removal of native forest and replacement by pasture. Areas with high to moderate SDP are associated with native forest fragments demonstrating the effects of the Atlantic Forest on the water infiltration and groundwater recharge processes, given by the greater contribution of baseflow in a forested catchment located within the studied watershed. The analysis of soil micromorphological images provided useful supporting information on the soil porosity system and along with hydrological properties of the watershed helped understand the SDP behavior on subsurface and groundwater storage capacity. Index terms:Upper montane tropical forest; ecological services; mapping modeling; geomorphons. RESUMONo Brasil, a Serra da Mantiqueira, abriga um dos últimos remanescentes da Floresta Tropical de Altitude. Devido a grande exploração que vem ocorrendo neste bioma há décadas, a influência na hidropedologia decorrente das mudanças do uso do solo deve ser investigada. O objetivo deste estudo foi avaliar a influência do uso do solo na porosidade drenável do solo (PDS) em uma bacia hidrográfica localizada na região da Serra da Mantiqueira e validar os métodos propostos com base em indicadores micromorfológicos e hidrológicos. A vegetação nativa da área de estudo é a Mata Atlântica que ocupa 62% da área, e com os 38% restantes utilizados para pastagem. Trinta e nove combinações de variáveis ambientais foram testadas, cada uma gerando um mapa para predizer a PDS. O desempenho da predição espacial da PDS foi avaliado utilizando 20% dos dados do número total de amostras coletadas em toda a bacia hidrográfica. Os menores valores de PDS são devidos ao processo de remoção de floresta nativa e substituição por pastagem. Áreas com altos a moderados valores de PDS estão associadas a fragmentos de florestas nativas que demonstram os efeitos da Mata Atlântica nos processos de infiltração de água e de recarga de água subterrânea na região da Mantiqueira, dada a maior contribuição do fluxo base em ...

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“…However, in Brazil, only a few studies with this model can be found in the literature, mostly related to streamflow forecasting in watersheds under the influence of the Amazon Forest (Cuartas et al, 2012), and the Atlantic Forest in mountainous regions of southeastern Brazil (Kruk, 2008;Alvarenga et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Performance of a Distributed Hydrological Model Based on Soil and Moisture Zone Maps

Alvarenga

Mello

Colombo

et al. 2017

Rev. Bras. Ciênc. Solo

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ABSTRACT:The scarcity of field data to develop soil maps through a pedological survey is one of the main limitations to using distributed hydrological models, especially in small and medium-sized watersheds. The aim of this study was to compare a distributed hydrological model prediction to a soil map based on a pedological survey and a moisture zone map obtained using the Height Above the Nearest Drainage -HAND model. The Distributed Hydrology Soil Vegetation Model -DHSVM, which is a physically-based and distributed hydrological model, was applied to a mountainous watershed, located in the region of the Mantiqueira Range in the south of Minas Gerais in southeastern Brazil, and was compared to both maps mentioned above, taking the soil map developed by the pedological survey as a reference. Daily weather and streamflow data-sets were used for DHSVM calibration and validation using the two different maps (soil and moisture zone maps) as inputs. In both simulations, the DHSVM performed well, with outputs indicating a good relationship between topographical and hydrological characteristics from the two types of maps. Thus, the moisture zone map obtained by the HAND model can also be successfully used in distributed hydrological modeling, especially for mountainous regions in southeastern Brazil.

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Assessment of land cover change on the hydrology of a Brazilian headwater watershed using the Distributed Hydrology-Soil-Vegetation Model

Cited by 73 publications

References 38 publications

Hydrological responses to climate changes in a headwater watershed

Hydrological responses to climate changes in a headwater watershed

Land-use effect on hydropedology in a mountainous region of Southeastern Brazil

Performance of a Distributed Hydrological Model Based on Soil and Moisture Zone Maps

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