TY - JOUR
T1 - Gravimetric Determination of Storage Coefficient and Storage Change of Groundwater in an Uncontrolled and Unconfined Aquifer
AU - Hernández-Sánchez, Rosa Isabel
AU - Castellanos, Francisco
AU - Herrera-Barrientos, Jaime
AU - Belmonte-Jiménez, Salvador Isidro
N1 - Funding Information:
The authors acknowledge the support of the Instituto de Geofísica of the Universidad Nacional Autónoma de México (UNAM) and of the Centro de Investigación Científica y de Educación Superior de Ensenada, B.C. (CICESE), for the loan of a Lacoste and Romberg gravimeter and a Scintrex SG-5 gravimeter to undertake measurements in October 1996 and May 2018, respectively; also for the partial funding by the Instituto Politécnico Nacional (IPN, México) through projects SIP 20181176 and SIP 20196181. In addition, the first author wishes to acknowledge to the Consejo Nacional de Ciencia y Tecnología (CONACyT) for her scholarship for doctoral studies.
Funding Information:
The authors acknowledge the support of the Instituto de Geof?sica of the Universidad Nacional Aut?noma de M?xico (UNAM) and of the?Centro de Investigaci?n Cient?fica y de Educaci?n Superior de Ensenada, B.C. (CICESE), for the loan of a Lacoste and Romberg gravimeter and a Scintrex SG-5 gravimeter to undertake measurements in October 1996 and May 2018, respectively; also for the partial funding by the Instituto Polit?cnico Nacional (IPN, M?xico) through projects SIP 20181176 and SIP 20196181. In addition, the first author wishes to acknowledge to the?Consejo Nacional de Ciencia y Tecnolog?a?(CONACyT) for her scholarship for doctoral studies.
Publisher Copyright:
© 2021, International Association for Mathematical Geosciences.
PY - 2021/12
Y1 - 2021/12
N2 - Adequate management of water resources in aquifer systems implies knowledge of the different parameters of hydrological balance. However, only limited data exist for many aquifers, which lead to the production of hydrological models with high levels of uncertainty. This research estimates spatially and temporally the groundwater storage change and the storage coefficient in unconfined aquifers and under uncontrolled conditions by means of gravimetric data and validates the estimates by two procedures based on piezometric data. The application of the three procedures was carried out in an aquifer located in the Etla Valley, Oaxaca, Mexico. Piezometric data and gravitational field measurements from October 1996 and May 2018 were employed. Groundwater storage change was calculated via piezometry, residual Bouguer anomaly and gravimetry. The piezometric and gravimetric procedures estimated similar spatial distributions of groundwater recharge and discharge areas but different reductions in groundwater storage volume. The gravimetric method estimated a loss that was 50% lower than that produced by the procedures based on piezometry. The storage coefficient varied spatially in a range between − 0.22 and 0.30, assuming a theoretical relationship between gravimetric and piezometric variations based on the Bouguer slab model.
AB - Adequate management of water resources in aquifer systems implies knowledge of the different parameters of hydrological balance. However, only limited data exist for many aquifers, which lead to the production of hydrological models with high levels of uncertainty. This research estimates spatially and temporally the groundwater storage change and the storage coefficient in unconfined aquifers and under uncontrolled conditions by means of gravimetric data and validates the estimates by two procedures based on piezometric data. The application of the three procedures was carried out in an aquifer located in the Etla Valley, Oaxaca, Mexico. Piezometric data and gravitational field measurements from October 1996 and May 2018 were employed. Groundwater storage change was calculated via piezometry, residual Bouguer anomaly and gravimetry. The piezometric and gravimetric procedures estimated similar spatial distributions of groundwater recharge and discharge areas but different reductions in groundwater storage volume. The gravimetric method estimated a loss that was 50% lower than that produced by the procedures based on piezometry. The storage coefficient varied spatially in a range between − 0.22 and 0.30, assuming a theoretical relationship between gravimetric and piezometric variations based on the Bouguer slab model.
KW - Gravimetry
KW - Storage change
KW - Storage coefficient
KW - Unconfined aquifer
KW - Uncontrolled aquifer
UR - http://www.scopus.com/inward/record.url?scp=85110767563&partnerID=8YFLogxK
U2 - 10.1007/s11053-021-09904-7
DO - 10.1007/s11053-021-09904-7
M3 - Artículo
AN - SCOPUS:85110767563
SN - 1520-7439
VL - 30
SP - 4207
EP - 4218
JO - Natural Resources Research
JF - Natural Resources Research
IS - 6
ER -