Groundwater governance: The illegality of exploitation and ways to minimize the problem

Conicelli, Bruno; Hirata, Ricardo; Galvão, Paulo; Aranda, Nataly; Terada, Rafael; Gutiérrez, Oswaldo José G.

doi:10.1590/0001-3765202120200623

Cited by 14 publications

(8 citation statements)

References 22 publications

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“…No Brasil, apesar da aparente abundância em recursos hídricos superficiais e subterrâneos, há registros de conflitos relacionados à quantidade e ou qualidade dos mesmos (CONICELLI et al 2021).…”

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Aplicação de gases nobres e seus isótopos na hidrogeologia

Kirchheim¹,

Chang²,

Gastmans³

et al. 2021

Derb.

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À medida que as demandas por água aumentam, torna-se imperativo conhecer as dinâmicas de circulação das águas subterrâneas nos aquíferos, informação indispensável para a gestão sustentável dos mesmos. As técnicas envolvendo os traçadores ambientais e, dentre estes, especificamente aqueles inerentes aos gases nobres e seus isótopos, fornecem valiosas informações, como por exemplo, os tempos de residência das águas subterrâneas e as paleotemperaturas de recarga. Os gases nobres, representados pelo He, Ne, Ar, Kr e Xe possuem propriedades físicas e químicas que variam sistematicamente com seu peso atômico, além de amplas variações em suas composições isotópicas decorrentes de processos nucleares a partir de elementos parentais relativamente mais abundantes. Pelo fato de serem inertes, os gases nobres não sofrem alterações químicas e isotópicas nas interações água-rocha. Sua presença nas águas subterrâneas pode ser interpretada como uma mistura entre a componente atmosférica e a componente não atmosférica (radiogênica e/ou terrigênica). Enquanto a componente atmosférica guarda registros de dinâmicas pretéritas associadas aos processos de recarga e, portanto, de paleoambientes e clima, as componentes não atmosféricas, essencialmente associadas aos isótopos de He (3He e 4He), assim como isótopos radiogênicos, entre eles o 81Kr, 85Kr e 39Ar, fornecem informação de caráter cronológico. O presente artigo apresenta uma completa revisão bibliográfica sobre o significado da concentração dos gases nobres dissolvidos em água, suas respectivas componentes e os caminhos metodológicos empregados para extrair informações para a hidrogeologia. Da mesma forma, são apresentadas as práticas amostrais de campo, as estratégias analíticas e os caminhos metodológicos para o tratamento dos dados, a partir da alusão aos principais trabalhos desenvolvidos pela comunidade científica internacional. Finalmente, são apresentadas e discutidas as iniciativas pioneiras em gases nobres no Brasil, com destaque para as aplicações no âmbito do Sistema Aquífero Guarani. Dessa forma, o presente trabalho fornece uma ampla visão do uso dos gases nobres e informações relevantes para a difusão das referidas técnicas no país.

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unclassified

Aplicação de gases nobres e seus isótopos na hidrogeologia

Kirchheim¹,

Chang²,

Gastmans³

et al. 2021

Derb.

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“…There is a higher concentration in the northeast region (see Figure 8a), likely due to the region's vulnerability to recurring drought events (Cunha et al, 2018;Medeiros & Sivapalan, 2020). Over half of the analyzed wells were drilled after the 2000s (see Figure 8b), indicating an increasing dependence on groundwater in Brazil (Hirata et al, 2015;Conicelli et al, 2021). This shift can be attributed to various factors, including the growing impacts of droughts and climate change on surface water sources (Marengo et al, 2016;Hirata & Suhogusof, 2019;van Vliet et al, 2023).…”

Section: Compilation Of Groundwater Data In Brazilmentioning

confidence: 97%

“…Even with this conservative analysis, this proportion exceeds 60% in many regions of the country (see Figure 9b), especially in the mostly semi-arid northeastern Brazil and in areas with historic groundwater pumping, such as the São Francisco River Basin (Lucas et al, 2021), Verde Grande Basin (Conicelli et al, 2021), and some regions of the state of São Paulo (Rodríguez et al, 2013;Hirata & Foster, 2020). More information about the proportion of wells Source: Author (2023) This suggests that several regions in Brazil, either due to indiscriminate excess groundwater use or other hydroclimatic and anthropogenic drivers (e.g., precipitation, evaporation, and changes in land use and cover processes), already exhibit conditions conducive to the emergence of losing rivers (Rodríguez et al, 2013;Hirata & Foster, 2020;Lucas et al, 2020), challenging the general assumption that rivers should mainly gain water from underlying aquifers.…”

Section: Direction Of Flow Between Brazilian Rivers and Free Aquifersmentioning

confidence: 97%

“…Recent estimates indicate the presence of over 2.5 million tubular wells in the country. Remarkably, around 88% of these wells operate without official authorization (lacking a license or registration for pumping), making a substantial contribution to water supply that goes unaccounted for in official statistics Conicelli et al, 2021). Out of these millions of wells, 346,403 are registered with the Geological Survey of Brazil (SGB/CPRM).…”

Section: Compilation Of Groundwater Data In Brazilmentioning

confidence: 99%

“…Subsequently, the insights gained from these long-term measures can be translated into local water management practices (Conicelli et al, 2021;Condon et al, 2021;United Nations, 2022).…”

Section: Implications Of Widespread Potential Streamflow Loss Into Un...mentioning

confidence: 99%

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Understanding hydrological connectivity: an empirical study of river-aquifer interaction across Brazil

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Estimating groundwater recharge and precipitation sources of the Zamora River Basin, southeastern Ecuador, using GIS and stable isotopes

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The correct management of groundwater depends on information regarding the evolutionary processes of groundwater and the characterization of spatial variability of recharge mechanisms. GIS-based index models have become a reliable alternative for mapping and interpreting recharge models due to their adaptability and reliability in estimating recharge. Furthermore, stable isotopes of hydrogen and oxygen in water (δ 2 H and δ 18 O) help determine the origin and monitoring of water in the hydrological cycle. This paper aims to contribute to the knowledge of groundwater recharge by developing a conceptual recharge model using stable isotopes and estimating the recharge amount using a spatially distributed water balance model based on GIS for the Zamora River Basin (ZRB) in Ecuadorian Amazon. Due to the basin's size and geography, it was necessary to divide it into six precipitation blocks. The high precipitation rates resulted in high (18.22%) and moderate (30.93%) recharge zones across the basin. The analysis of stable isotopes in water indicates that precipitation water comes from the east, from the Amazon plain. In the valleys, precipitation enriched in δ 18 O suggests that it has undergone a recycling process in the basin; groundwater recharge comes from these precipitations. This analysis provides a simpli ed representation of reality that can assist in predicting the impacts of human activities on the basin.

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Groundwater governance: The illegality of exploitation and ways to minimize the problem

Cited by 14 publications

References 22 publications

Aplicação de gases nobres e seus isótopos na hidrogeologia

Aplicação de gases nobres e seus isótopos na hidrogeologia

Understanding hydrological connectivity: an empirical study of river-aquifer interaction across Brazil

Estimating groundwater recharge and precipitation sources of the Zamora River Basin, southeastern Ecuador, using GIS and stable isotopes

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