Impacts of climate change on the evaporation and availability of water in small reservoirs in the Brazilian savannah

Althoff, Daniel; Silva, Demétrius David da

doi:10.1007/s10584-020-02656-y

Cited by 47 publications

(24 citation statements)

References 59 publications

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“…As opposed to small farm reservoirs, the construction of large dams could regularize the flow during periods longer than a year. However, both small and large dams could notably increase water losses due to evaporation (Althoff et al 2020c;Pereira et al 2009). More technically sound alternatives could help prevent such losses and simultaneously produce energy.…”

Section: Can the Sustainable Water Use Be Increased?mentioning

confidence: 99%

“…The northern Cerrado, which experiences a more arid climate, should require a greater effort to improve the sustainable use of surface water. Farm-level reservoirs should preferably be deeper than wider (Althoff et al 2020c). Alternatively, underground reservoirs should be built to restrict subsurface runoff and extend the period when the soil moisture level is higher.…”

Section: Can the Sustainable Water Use Be Increased?mentioning

confidence: 99%

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Assessment of water availability vulnerability in the Cerrado

Althoff

Silva

2021

Appl Water Sci

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Many basins in the Cerrado biome already face increases in water disputes caused by agricultural expansion without long-term planning and monitoring of natural resources. The amount and timing of water availability are crucial for the socioeconomic development of agricultural activities and climate change resilience enhancement in the Cerrado. This study relied on a dataset developed for the Cerrado to characterize its climate and current water availability status. Different climate indices and hydrological signatures were adopted to describe the energy and water budget, climate seasonality, flow magnitude, flow dynamics, and average duration of low-flow events. Risk analysis was carried out to classify the monthly risk severity and identify periods and regions under a higher pressure regarding water availability in the Cerrado. Overall, the water availability is higher in the western and southern regions and lower in the eastern and northern regions, which experience a transition to a humid and semiarid climate, respectively. The water resources in the Cerrado occur under the highest pressure in September and October. We also identified regions with the potential to increase sustainable water use. These regions exhibit a low ratio between the flow equal to or exceeded 95% of the time and the mean flow (Q95/Q), which indicates that sustainable water use may be improved with techniques related to flow regularization and rainwater/runoff harvesting.

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Section: Can the Sustainable Water Use Be Increased?mentioning

confidence: 99%

Section: Can the Sustainable Water Use Be Increased?mentioning

confidence: 99%

Assessment of water availability vulnerability in the Cerrado

Althoff

Silva

2021

Appl Water Sci

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“…Brazil's economy strongly relies on agriculture, which in turn relies on rainfall patterns and river flow. Many studies discuss the increase in small reservoir numbers for reduced water vulnerability (Andreini et al 2003;Krol et al 2011;Malveira et al 2012;Dong et al 2019;Althoff et al 2020). The Southeast region has gone through eight severe droughts since 1920 (Hunt et al 2018b).…”

Section: Use Of Reservoirs To Reduce Climate Vulnerabilitymentioning

confidence: 99%

“…Usually, relative humidity is at its minimum from August to the beginning of October, and evaporation peaks. Although this period is long, it occurs when reservoir levels and river flows are at their lower levels (Althoff et al 2020), which reduces evaporation losses.…”

Section: Introductionmentioning

confidence: 99%

Hydropower impact on the river flow of a humid regional climate

et al. 2020

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Land use and water management have considerable impacts on regional climates. This paper proposes that in humid regions with low wind patterns the construction of hydropower storage reservoirs contributes to the increases in the probability of precipitation in the regional climate. This observation has been tested with a methodology that calculates the cumulative influence of reservoir construction in the basins surrounding with a proposed index named Cumulative Impact of Existing Reservoirs, and compares this index with the historical flow of the rivers. It was found that the construction of reservoirs in Brazil had a considerable impact on its river flows.

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“…O Cerrado brasileiro é considerado a maior e mais rica savana tropical no mundo (RODRIGUES et al, 2020), que ocupa um quarto do território nacional, abrigando um terço da biodiversidade do Brasil e, por seu alto índice de endemismo, é considerada a savana de maior biodiversidade no planeta (SANO et al, 2019;STRASSBURG et al, 2017). O Cerrado concentra 43% das águas superficiais do país fora da Amazônia, contribuindo com 80% da produção energética e 60% da agropecuária no país (MONTEIRO et al, 2020).…”

Section: Cerrado Stricto Sensuunclassified

Monitoramento e modelagem do processo de interceptação em área de Cerrado stricto sensu

Rosalem¹

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AGRADECIMENTOSÀ Deus pelo seu imenso amor e misericórdia por mim a cada dia e pela luz para o Caminho.Ao meu esposo Lucas por todo o suporte, carinho e companheirismo sem igual.Obrigada pelos abraços fortes nos momentos que preciso e por me encorajar sempre.À minha querida irmã pelo carinho e apoio imensuráveis que me impulsionam a seguir adiante, e à minha mãe pelo seu grande amor incondicional e exemplo de vida.Vocês são essenciais para mim. Também aos meus sogros, Delson e Miriam, e meu cunhado Maikon por serem tão solícitos e amáveis comigo. Aos meus amados irmãos da IPB de São Carlos, que nos acolheram e cuidaram tão bem durante esse período. Obrigada por todo o carinho e ensinamentos recebidos. Guardo-os em meu coração.

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Impacts of climate change on the evaporation and availability of water in small reservoirs in the Brazilian savannah

Cited by 47 publications

References 59 publications

Assessment of water availability vulnerability in the Cerrado

Assessment of water availability vulnerability in the Cerrado

Hydropower impact on the river flow of a humid regional climate

Monitoramento e modelagem do processo de interceptação em área de Cerrado stricto sensu

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