A groundwater security model based on hydraulic turnover times and flow compartments

MethodsX

Marília Carvalho de Melo¹  António Carlos Pinheiro Fernandes²  João Paulo Moura²  Luís Filipe Sanches Fernandes²  Fernando António Leal Pacheco³  Xana Álvarez⁴  Teresa Cristina Tarlé Pissarra⁵  Lisa Maria de Oliveira Martins⁶ 

[1] Corresponding authors.;Centro de Investigação e Tecnologias Agroambientais e Biológicas (CITAB), Universidade de Trás-os-Montes e Alto Douro (UTAD), Ap. 1013, Vila Real 5001-801, Portugal;Centro de Química de Vila Real (CQVR), Universidade de Trás-os-Montes e Alto Douro (UTAD), Ap. 1013, Vila Real 5001-801, Portugal;Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista (UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Jaboticabal, SP 14884-900, Brazil;Secretaria de Estado de Meio Ambiente e Desenvolvimento Sustentável, Cidade Administrativa do Estado de Minas Gerais, Rodovia João Paulo II, 4143, Bairro Serra Verde, Belo Horizonte, Minas Gerais, Brazil;University of Vigo, Agroforestry Group, School of Forestry Engineering, Pontevedra 36005, Spain;

关键词: Hydraulic turnover time;    Groundwater discharge;    Watershed mobile storage;    Aquifer self-depuration capacity;    Aquifer yield capacity;    Aquifer resilience;   

DOI  :  

来源: DOAJ

【 摘 要 】

Starting with a log-linear relationship between groundwater discharge per unit drainage area (Q/Ab), hydraulic turnover time (t) and aquifer mobile storage (z), this study builds a groundwater security method at catchment scale. The method embeds previously published approaches to calculate Q/Ab, t and z, and relies solely on stream flow discharges and watershed areas. The ability to build a method on a couple of variables is remarkable. The method recasts the calculated variables as aquifer security indicators (SQ, St and Sz), relating SQ with yield capacity, St with self-depuration capacity and Sz with resilience. Groundwater security is the weighted product of SQ, St and Sz. The method is validated with stream flow discharges and drainage areas concerning 294 hydrometric stations and their watersheds, located in continental Portugal. The results revealed a majority of moderately to highly secure watersheds, especially as regards St (> 62%), while 7–10% were classified as very highly secured in general (SQ-St-Sz). The least secured basins are located in the more arid regions of continental Portugal (Northeast and south regions), as expected. The method can be easily transposed to any other region worldwide, with the necessary adaptions to regional climate, geological and topographic settings.• Compile stream flow discharge data and organize them as natural logarithms and logarithmic variations as function of time, to estimate Q, t and z;• Recast the Q, t and z values as SQ, St and Sz ratings, respectively, using the appropriate reclassification scales, and estimate watershed security levels, namely average security or customized (weighted) securities that highlight the contributions of Q/Ab (watershed yield), t (aquifer's self-depuration capacity) or z (aquifer's resilience);• Use the results to draw illustrative diagrams and spatial distribution maps.

【 授权许可】

Unknown