Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region

Mendonça, Janaina Castro de; Lopes, Fernando Bezerra; Andrade, Eunice Maia de; Praxedes, Carine Fernandes; Lima, Francisco Josivan de Oliveira; Silva, Fernanda Helena Oliveira da

doi:10.5935/1806-6690.20230033

Cited by 1 publication

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“…The AEB has been monitored since January 2003 by the study group HIDROSED (Hydrosedimentological Research Group of the Semiarid Region, http://www.hidrosed.ufc.br). Studies carried out in the basin during this period include measurements and analysis of hydrological variables, such as precipitation, evaporation, evapotranspiration, surface runoff and losses from plant interception (Costa et al, 2021; de Araújo & Piedra, 2009; de Figueiredo et al, 2016; Medeiros et al, 2009) besides hydrogeological and sedimentological studies (Costa et al, 2013; Costa et al, 2016; Pinheiro et al, 2016; Pinheiro et al, 2018), among others. The AEB is divided into three soil‐vegetation associations (SVAs).…”

Section: Methodsmentioning

confidence: 99%

Water storage of a typical tree species in the Caatinga biome (Caesalpinia pyramidalis Tul.)

Costa,

Vellame,

Costa

et al. 2023

Hydrological Processes

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Our understanding of the movement and storage of water in typical Caatinga plants is still limited and often disregarded in water balance calculations. This is why the objective of this work was to evaluate the water storage dynamic in typical trees of the Caatinga biome during the dry, rainy and transition period by gauging the water content levels that cause the onset of leaf emergence. In a preserved Caatinga forest, soil and stem water content of six trees of the representative species catingueira (Caesalpinia pyramidalis Tul.) were monitored with low‐cost capacitive sensors. Leaf moisture, leaf area index, leaf and stem water volume, and sap flow density were measured. The emergence of leaves occurred with a stem moisture of 0.32 m3 m−3, and the leaf area index was maximum with a stem moisture of 0.34 m3 m−3. Catingueira plants are able to absorb water below the soil water potential commonly determined as the permanent wilting point (−1.5 MPa). The volume of water stored in the plants represents 108% of the average volume stored in the Boqueirão reservoir during the study period.

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