Estimativas de recarga aquífera com uso de filtros digitais em sub-bacias hidrográficas do Sistema Aquífero Serra Geral no estado do Rio Grande do Sul

Bortolin, Taison Anderson; Reginato, Pedro Antônio Roehe; Presotto, M.; Schneider, Vania Elisabete

doi:10.18226/23185279.v6iss2p21

Cited by 5 publications

(6 citation statements)

References 21 publications

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“…For the Cambisol class (number "1", first digit), the great variation between simulated and regionalized values suggest caution when adopting a mean reference value since, according to Castro [58], this type of soil has a wide range of hydrological behavior, which would cause the difference to be actually from real physical variations in the basins. Nonetheless, it can be highlighted that Cambisol in the Ribeirão Rodeador basin is located, predominantly, in steeper areas with Cerrado fields and riparian forests, a combination that, according to Bortolin et al [1] and Santos [47], is theoretically unfavorable to recharge groundwater.…”

Section: Resultsmentioning

confidence: 99%

“…Despite the importance of groundwater in volume, ecology, economy, and society, the lack of knowledge about hydrogeological systems contrasts with scenarios of contamination and depletion of these systems because of inordinate exploitation [1][2][3]. Considering that the remediation and/or recovery of aquifers is, at times, unfeasible [3], management is the best alternative to protect and maintain groundwater reserves [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Amongst these methods, it can be highlighted: (i) the ones based on measuring the water table level [14][15][16]; (ii) the ones that use chemical tracers [17][18][19][20][21]; (iii) the ones based on direct Regardless of the issue, the intention, for the most part, is to provide tools for information gathering, in a way that water management may be more rational and efficient. According to Bortolin et al [1], for surface water a lot has been accomplished in that sense, but there is still a huge gap to bridge when it comes to groundwater.…”

Section: Introductionmentioning

confidence: 99%

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Abacus to Predict Groundwater Recharge at Non-Instrumented Hydrographic Basins

Santos

Koide

Távora

et al. 2020

Water

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One of the first steps to implement a policy for groundwater resources management is knowing the groundwater recharge. However, the unavailability of data and resources to execute field studies increase the uncertainty associated with the estimation of groundwater recharge. To fill this gap, the present work aimed to propose a method to predict groundwater recharge at non-instrumented hydrographic basins. The approach proposed is based on using an abacus to execute the transposition and/or regionalization of results generated in an experimental basin. The methodology comprised the estimation and mapping of recharge rates in the experimental basin using three distinct approaches—numerical modelling of the saturated zone, distributed hydrological modelling of the vadose zone, and the method of fluctuation of the water table elevation—and the following generation of the abacus, with average recharge values for combinations of soil class, land use/cover and slope using geographic information systems. The results indicate that the abacus is consistent for some Ferrasol areas, that the reliability of average regionalized values depends on the complexity of the physical environment—soil class, land use/cover, and slope—and that new studies, focusing on the hydro-physical characterization of soils, might produce more reliable estimations.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Abacus to Predict Groundwater Recharge at Non-Instrumented Hydrographic Basins

Santos

Koide

Távora

et al. 2020

Water

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“…The hypothesis adopted was the existence of a connection between groundwater and surface water in the study area. The estimations for baseflow were performed both using field observation and in an indirect estimation of the total recharge occurring over the entire basin [80].…”

Section: Baseflow Separationmentioning

confidence: 99%

Groundwater Recharge in the Cerrado Biome, Brazil—A Multi-Method Study at Experimental Watershed Scale

Santos

Koide

Távora

et al. 2020

Water

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Groundwater recharge is a key hydrological process for integrated water resource management, as it recharges aquifers and maintains the baseflow of perennial rivers. In Brazil, the Cerrado biome is an important continental recharge zone, but information on rates and spatial distribution is still lacking for this country. The objective of this work was to characterize the groundwater recharge process in phreatic aquifers of the Cerrado biome. For this, an experimental watershed representative of the referred biome was established and intensively monitored. The methodology consisted of an inverse numerical modeling approach of the saturated zone and three classic methods of recharge evaluation—hydrological modeling, baseflow separation, and water table elevation. The results indicated average potential recharge around 35% of the annual precipitation, average effective recharge around 21%, and higher rates occurring in flat areas of Ferralsols covered with natural vegetation of the Cerrado biome. As the level of uncertainty inferred from the methods was high, these results were considered a first attempt and will be better evaluated by comparison with other methods not applied in this work, such as the lysimeter and chemical tracer methods.

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“…In addition, the use of the recursive digital filter technique is common among environmental studies. The following studies can be cited: Bortolin et al (2018), who used a filter parameter to estimate recharges in sub‐basins in the state of Rio Grande do Sul, Brazil; and Balbin‐Betancur (2019), who compared four different filter parameters to estimate the contribution of baseflow in areas with high rainfall rates within the Atrato River, Colombia.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of recharge estimation methods applied to fissure and karst aquifers of the Lagoa Santa Karst Environmental Protection Area, Brazil

Teixeira,

de Paula,

Velasquez

et al. 2023

Hydrological Processes

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The Lagoa Santa Karst Environmental Protection Area is known worldwide as the place where the oldest human fossil in the Americas was found. Beyond its archaeological richness is speleological, faunistic and floristic richness across this remarkable karstic landscape. It is also a region with important aquifers for public and private water supply. Located in the state of Minas Gerais, Brazil, despite its environmental relevance, the area is characterized by increased anthropic environmental impacts. Regarding the relationship between surface water and groundwater, in order to investigate the annual input of water into the aquifers, this study aimed to estimate the annual recharge rate in the hydrological years 2017 to 2021 using three methods: the recession curve displacement method of Rorabaugh (International Association of Scientific Hydrology, 1964, 63:432–441), the recursive digital filter method by Lyne and Hollick (Institute of Engineers Australia National Conference, 1979, pp. 89–93), and the method based on water‐table fluctuation in tubular wells proposed by Healy and Cook (Hydrogeology Journal, 2002, 10(1):91–109). The average percentage of rainfall that is recharged into the aquifer, considering the overall period studied from 2017 to 2021, found with the three methods was 13%, 9% and 9%, respectively, which indicates that recharge rates within the study area are low and that higher values are observed within karst basins in comparison with basins located in pelitic zones. Overall, the methods yielded coherent values among each other and were compared with previous studies in the area. In relation to the automatized recursive digital filter method, the automatized recession curve displacement method was more adherent because it considers daily streamflow measurements. The WTF method was handy for the local recharge rate analysis and enabled an evaluation of recharge rates in each aquifer unit. Despite the similarity of the values obtained in the methods, they are likely underestimated due to the high pumping rates of groundwater. Furthermore, it is recommended to deepen the correlation between lithotype, karst geomorphology, and its dissolution processes to improve the understanding of recharge processes.

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Estimativas de recarga aquífera com uso de filtros digitais em sub-bacias hidrográficas do Sistema Aquífero Serra Geral no estado do Rio Grande do Sul

Cited by 5 publications

References 21 publications

Abacus to Predict Groundwater Recharge at Non-Instrumented Hydrographic Basins

Abacus to Predict Groundwater Recharge at Non-Instrumented Hydrographic Basins

Groundwater Recharge in the Cerrado Biome, Brazil—A Multi-Method Study at Experimental Watershed Scale

Evaluation of recharge estimation methods applied to fissure and karst aquifers of the Lagoa Santa Karst Environmental Protection Area, Brazil

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