TY - JOUR
T1 - Identificação da interação rio-aquífero, por meio de gradientes de temperatura, em área de afloramento do Aquífero Guarani
AU - Wendland, Edson Cezar
AU - Reis, Alan
AU - Anache, Jamil Alexandre Ayach
AU - Rosa, David Maycon Schimdt
AU - Alcântara, Gabriel de Miranda
AU - Lowry, Christopher Scott
AU - Lin, Yu Feng Forrest
N1 - Funding Information:
grant 2015/03806-1) for the financial support. The second author thanks the National Council for Scientific and Technological Development (CNPq) for the financial support in the form of a Ph.D. scholarship (Process nº 165004/2018-5).
Funding Information:
The authors thank São Paulo Research Foundation (FAPESP
Publisher Copyright:
© 2022, Brazilian Journal of Water Resources. All rights reserved.
PY - 2022
Y1 - 2022
N2 - The use of temperature as a natural tracer in hydrology is noticed since the 1960s. In recent years, there has been a revival of the use of this physical property in the investigation of water cycle. The main reasons are the cost reduction of temperature measurements and the development of distributed temperature sensing. Here, we present a study of the groundwater-surface water interaction in the Onça Creek Watershed (Guarani Aquifer System outcrop) using stream discharge data and temperature as a natural tracer. Two Parshall flumes were installed 1.2 km apart to quantify stream discharge and determine groundwater contribution. We used an optic fiber cable to identify interaction locations and a probe with thermistors to measure the vertical temperature gradient and estimate flux rates. The results show a discharge difference of ~250 m3.h-1 between both flumes, which we interpret as baseflow contribution. The distributed temperature sensing allowed the identification of regions with gaining behavior. Discharge rates between 200 and 300 mm.day-1 were determined from vertical temperature measurements, which agrees with the streamflow data. The study demonstrated that temperature is attractive as natural tracer in tropical conditions, where the groundwater temperature is higher than the surface water temperature, especially during the winter.
AB - The use of temperature as a natural tracer in hydrology is noticed since the 1960s. In recent years, there has been a revival of the use of this physical property in the investigation of water cycle. The main reasons are the cost reduction of temperature measurements and the development of distributed temperature sensing. Here, we present a study of the groundwater-surface water interaction in the Onça Creek Watershed (Guarani Aquifer System outcrop) using stream discharge data and temperature as a natural tracer. Two Parshall flumes were installed 1.2 km apart to quantify stream discharge and determine groundwater contribution. We used an optic fiber cable to identify interaction locations and a probe with thermistors to measure the vertical temperature gradient and estimate flux rates. The results show a discharge difference of ~250 m3.h-1 between both flumes, which we interpret as baseflow contribution. The distributed temperature sensing allowed the identification of regions with gaining behavior. Discharge rates between 200 and 300 mm.day-1 were determined from vertical temperature measurements, which agrees with the streamflow data. The study demonstrated that temperature is attractive as natural tracer in tropical conditions, where the groundwater temperature is higher than the surface water temperature, especially during the winter.
KW - Distributed temperature sensing
KW - Fiber optics
KW - Groundwater-surface water interactions
KW - Guarani Aquifer system
KW - Streambed temperature
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U2 - 10.1590/2318-0331.272220220058
DO - 10.1590/2318-0331.272220220058
M3 - Article
AN - SCOPUS:85140838605
SN - 2318-0331
VL - 27
JO - Revista Brasileira de Recursos Hidricos
JF - Revista Brasileira de Recursos Hidricos
M1 - e23
ER -