Self-potential (SP) response to seawater intrusion in coastal aquifers

D.J. MacAllister; M.D. Jackson; A.P.  Butler; Jan Vinogradov

Self-potential (SP) response to seawater intrusion in coastal aquifers

D.J. MacAllister, M.D. Jackson, A.P. Butler, Jan Vinogradov

Engineering

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Abstract

Seawater intrusion is a major threat to the sustainability of coastal water supplies. Long-term self-potential (SP) monitoring has been conducted on the South-Coast of the UK in the chalk aquifer, in order to test its application for remote detection of the saline front. Tidal SP fluctuations of c. 2mV have been observed. We attribute tidal SP fluctuations to the exclusion potential, caused by the salinity gradient and the movement of the saline front in the chalk matrix. Furthermore we observe a systematic increase in SP beginning 5 days prior
to saline breakthrough; with a maximum magnitude of 300µV at the base of the borehole. We attribute this to the diffusion potential, generated by the local movement of saline water through a fracture logged close to the location of the maximum SP change. These results suggest, for the first time, that SP can provide early warning of seawater intrusion

Original language	English
Title of host publication	Proceedings of the 23th Salt Water Intrusion Meeting
Publisher	SWIM
Number of pages	4
Publication status	Published - 2014
Event	23rd Salt Water Intrusion Meeting - Husum, Germany Duration: 16 Jun 2014 → 20 Jun 2014

Conference

Conference	23rd Salt Water Intrusion Meeting
Abbreviated title	SWIM 2014
Country/Territory	Germany
City	Husum
Period	16/06/14 → 20/06/14

Access to Document

http://www.swim-site.nl/pdf/swim23/a-65.pdfLicence: Unspecified

Cite this

@inproceedings{ac512d4e808c4100a9a699dfef56ccb7,

title = "Self-potential (SP) response to seawater intrusion in coastal aquifers",

abstract = "Seawater intrusion is a major threat to the sustainability of coastal water supplies. Long-term self-potential (SP) monitoring has been conducted on the South-Coast of the UK in the chalk aquifer, in order to test its application for remote detection of the saline front. Tidal SP fluctuations of c. 2mV have been observed. We attribute tidal SP fluctuations to the exclusion potential, caused by the salinity gradient and the movement of the saline front in the chalk matrix. Furthermore we observe a systematic increase in SP beginning 5 days priorto saline breakthrough; with a maximum magnitude of 300µV at the base of the borehole. We attribute this to the diffusion potential, generated by the local movement of saline water through a fracture logged close to the location of the maximum SP change. These results suggest, for the first time, that SP can provide early warning of seawater intrusion",

author = "D.J. MacAllister and M.D. Jackson and A.P. Butler and Jan Vinogradov",

year = "2014",

language = "English",

booktitle = "Proceedings of the 23th Salt Water Intrusion Meeting",

publisher = "SWIM",

note = "23rd Salt Water Intrusion Meeting, SWIM 2014 ; Conference date: 16-06-2014 Through 20-06-2014",

}

TY - GEN

T1 - Self-potential (SP) response to seawater intrusion in coastal aquifers

AU - MacAllister, D.J.

AU - Jackson, M.D.

AU - Butler, A.P.

AU - Vinogradov, Jan

PY - 2014

Y1 - 2014

N2 - Seawater intrusion is a major threat to the sustainability of coastal water supplies. Long-term self-potential (SP) monitoring has been conducted on the South-Coast of the UK in the chalk aquifer, in order to test its application for remote detection of the saline front. Tidal SP fluctuations of c. 2mV have been observed. We attribute tidal SP fluctuations to the exclusion potential, caused by the salinity gradient and the movement of the saline front in the chalk matrix. Furthermore we observe a systematic increase in SP beginning 5 days priorto saline breakthrough; with a maximum magnitude of 300µV at the base of the borehole. We attribute this to the diffusion potential, generated by the local movement of saline water through a fracture logged close to the location of the maximum SP change. These results suggest, for the first time, that SP can provide early warning of seawater intrusion

AB - Seawater intrusion is a major threat to the sustainability of coastal water supplies. Long-term self-potential (SP) monitoring has been conducted on the South-Coast of the UK in the chalk aquifer, in order to test its application for remote detection of the saline front. Tidal SP fluctuations of c. 2mV have been observed. We attribute tidal SP fluctuations to the exclusion potential, caused by the salinity gradient and the movement of the saline front in the chalk matrix. Furthermore we observe a systematic increase in SP beginning 5 days priorto saline breakthrough; with a maximum magnitude of 300µV at the base of the borehole. We attribute this to the diffusion potential, generated by the local movement of saline water through a fracture logged close to the location of the maximum SP change. These results suggest, for the first time, that SP can provide early warning of seawater intrusion

M3 - Published conference contribution

BT - Proceedings of the 23th Salt Water Intrusion Meeting

PB - SWIM

T2 - 23rd Salt Water Intrusion Meeting

Y2 - 16 June 2014 through 20 June 2014

ER -

Self-potential (SP) response to seawater intrusion in coastal aquifers

Abstract

Conference

Access to Document

Fingerprint

Cite this