RT Journal Article
T1 Identification of leakage and potential areas for internal erosion combining ERT and IP techniques at the Negratín Dam left abutment (Granada, southern Spain)
A1 Martínez Moreno, Francisco José
A1 Delgado Ramos, Fernando
A1 Galindo Zaldívar, Jesús
A1 Martín Rosales, Wenceslao
A1 López Chicano, Manuel
A1 González Castillo, María Lourdes
AB At the Negratín Dam (southern Spain) two main springs derived from the water reservoir were detected on the west side of the mountain ridge, matching the location of the left abutment of the dam. The seepages appear when the levelof the stored water exceeds 622 meters above sea level (m a.s.l.), where some paleochannels are embedded in the silts. The water level was at 631 m a.s.l. on the day of the measurements (13/12/23), close to the historical maximum(633.78 m a.s.l.). Although the water crossing the leaks does not drag particles nowadays, this sector may potentially cause internal erosion or piping phenomena implying a loss of water resources and slope instability problems. Theinfiltration areas were evaluated by electrical resistivity and induced polarization methods, measured along one profile on the mountain ridge between the water reservoir and the springs. We determine that the infiltrations zones arecharacterized by low resistivity and high chargeability distributed in small areas. We demonstrate that these methods are a reliable tool to detect and characterize infiltration zones, and they are the first step to planning mitigation actionsto avoid the piping phenomena.
PB Elsevier
SN 0013-7952
YR 2018
FD 2018-06-05
LK https://hdl.handle.net/20.500.14352/112976
UL https://hdl.handle.net/20.500.14352/112976
LA eng
NO Martínez-Moreno, F. J., Delgado-Ramos, F., Galindo-Zaldívar, J., Martín-Rosales, W., López-Chicano, M., & González-Castillo, L. (2018). Identification of leakage and potential areas for internal erosion combining ERT and IP techniques at the Negratín Dam left abutment (Granada, southern Spain). Engineering Geology, 240, 74-80.
NO Gobierno de España
NO Instituto Dom Luiz
NO Junta de Andalucía
DS Docta Complutense
RD 7 abr 2025