Hydrologic Impacts Due to the Changes in Riparian Buffer in a Headwater Watershed

Alvarenga, Lívia Alves; Mello, Carlos Rogério de; Colombo, Alberto; Cuartas, Luz Adriana

doi:10.1590/01047760201723012205

Cited by 20 publications

(14 citation statements)

References 22 publications

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“…Our results indicate that a reduction or fragmentation of the RZ to the advantage of cropland expansion can increase soil bulk density and reduce its total and macro porosity. This could increase the overland flow generation, and it aligns with findings from Alvarenga et al (2017), who used the Distributed Hydrology Soil Vegetation Model (Sun et al, 2015) and found that an increase in the riparian width from 30 to 100 m decreased in 6.2% the total overland flow generation in a 6.76-km² catchment in the Atlantic rainforest.…”

Section: Implications Of Rz Conservation On Soil and Water Qualitysupporting

confidence: 86%

Ecosystem services of a functionally diverse riparian zone in the Amazon–Cerrado agricultural frontier

Nóbrega¹,

Ziembowicz²,

Torres³

et al. 2019

Preprint

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The ecological services provided by protected riparian zones in human-altered landscapes are widely acknowledged, yet little is known about them. In this study, we assess ecosystem properties that a protected riparian zone maintains in contrast to environmental changes in its surroundings caused by agro-industrial activities in the northwestern fringe of the Brazilian Cerrado on the Amazon–Cerrado agricultural frontier. We assessed the plant biodiversity, soil hydro-physical properties, and water quality, to understand how the underlying ecological characteristics of a riparian zone withstand the effects of its neighboring cropland area on the stream water quality. We show that the riparian zone is fundamental in providing key ecosystem regulating services, including maintenance of plant biodiversity, soil properties, and water quality. Protection of plant biodiversity in the riparian zone sustains a synergy between soil, and functionally and phylogenetically diverse plant communities by promoting higher infiltration rates, higher soil porosity, and natural soil biogeochemistry conditions, which in turn have direct implications for stream water quality. Our study reaffirms that the conservation of riparian zones is crucial to buffer the negative impacts of agricultural practices on ecosystem services. Our results provide consistent evidence to support further studies and environmental policies for riparian environments, which are often the last fragment of natural vegetation remaining in the dominantly agricultural lands within the Cerrado and Amazon forests.

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Section: Implications Of Rz Conservation On Soil and Water Qualitysupporting

confidence: 86%

Ecosystem services of a functionally diverse riparian zone in the Amazon–Cerrado agricultural frontier

Nóbrega¹,

Ziembowicz²,

Torres³

et al. 2019

Preprint

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“…The Southeast region of Brazil is extremely relevant for the social and economic development of the country. The Grande River basin is located in southeastern Brazil and the Tropical Atlantic Forest in its headwater region (Mantiqueira Range), should be highlighted as one of the most important biodiversity hotspot of the world [1] [2]. In this basin, the annual variability of precipitation and temperature can be critical for human water consumption, irrigation, and hydropower generation [3] [4].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Climate Change on the Hydrology of a Small Brazilian Headwater Catchment Using the Distributed Hydrology-Soil-Vegetation Model

Alvarenga¹,

Mello²,

Colombo³

et al. 2018

AJCC

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Climate change is one of the greatest issues for human society. The objective of this study is to assess the impacts of future climate change on seasonal average discharge and monthly water budget in a small headwater catchment, located on the Grande River basin, in Minas Gerais, Brazil. The assessment is carried out using the hydrology model, DHSVM. The atmospheric forcing to drive the Distributed Hydrology-Soil-Vegetation Model (DHSVM) is derived from the downscaling of the HadGEM2-ES projections by the Eta Regional Climate Model, at 5-km high resolution. The projections assume the RCP4.5 and RCP8.5 IPCC AR5 emission scenarios. Baseline period was taken between 1961 and 1990. The projections are assessed in three time slices (2011-2040, 2041-2070 and 2071-2099). The climate change is assessed in time slices of 30 years and in comparison against the baseline period to evaluate the hydrological changes in the catchment. The results showed differences in the hydrological behavior between the emission scenarios and though time slices. Reductions in the magnitude of the seasonal average discharge and monthly water budget may alter the water availability. Under the RCP4.5 scenario, results show greater reductions in the water availability in the first time slice, whereas under RCP8.5 scenario greater reductions are indicated in the third time slice.

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“…Due to spatial resolution limitation, polyline vector files have been used to outline both PPA and recovery areas, since we do not have geographic information to spatialize watercourses widths. Although unconventional, polyline vector files have been reported in literature as a suitable technique to simulate PPA limits (Alvarenga et al, 2017;Rosot et al, 2018;Rodríguez-Romero et al, 2018;Valera et al, 2019).…”

Section: Perspectives For Regularizationmentioning

confidence: 99%

Permanent preservation areas in Mantiqueira sierra: perspectives for regularization along watercourses

et al. 2020

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Brazilian Native Vegetation Protection Law (Law n. 12.651/2012) brought flexibility related to the sizing of Permanent Preservation Areas (PPAs) along watercourses when there was anthropogenic occupation before July 22, 2008 (consolidated rural area), which may vary according to the size of the property. To better understand the effects of this law, we analyzed land use and land occupation in PPAs along watercourses in a portion of Grande River drainage basin. Scenarios were also developed to compare the effects of the reduction of PPA limits, allowing us to discuss measures to avoid water quality deterioration. We obtained the drainage network and individualized the study area through images available in Google Earth TM, and we extracted information about land use and land occupation from a vector provided by the Laboratory of Studies and Projects in Forest Management from Federal University of Lavras. Recovery scenarios were estimated according to Article n. 61-A from the Native Vegetation Protection Law. There was a significant reduction of environmental liability compared to previous legislation. In the more restrictive scenario, there may be a 31% deficit in recovery areas, where watersheds with a strong presence of small rural properties will be the most affected. Although the reduction of recovery areas is characterized as a retrogression in the protection of native vegetation, complementary strategies could be implemented, such as economic incentive mechanisms.

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Hydrologic Impacts Due to the Changes in Riparian Buffer in a Headwater Watershed

Cited by 20 publications

References 22 publications

Ecosystem services of a functionally diverse riparian zone in the Amazon–Cerrado agricultural frontier

Ecosystem services of a functionally diverse riparian zone in the Amazon–Cerrado agricultural frontier

Impacts of Climate Change on the Hydrology of a Small Brazilian Headwater Catchment Using the Distributed Hydrology-Soil-Vegetation Model

Permanent preservation areas in Mantiqueira sierra: perspectives for regularization along watercourses

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