Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements: the case of Pournari I dam (Greece)

Stella Pytharouli, Niloufar Zanganehasadabadi, Panagiotis Michalis

Research output: Contribution to conferenceAbstract

Abstract

Ageing earthfill dams become vulnerable to weather phenomena such as rainfall and flooding, with severe consequences, economic and life threatening, to the communities living downstream. A better understanding of their long-term behaviour and the factors affecting it, is crucial. A unique data set was used, consisting of the crest settlements of an earthfill, central clay core dam, the Pournari I dam in Greece, and the rainfall height values at the dam site between 1981 and 2015. The dam is 107 m high and its construction was completed in 1981. In previous studies the settlements of this dam, including rates, were found to be within limits and compliant with empirical relationships derived for dams of this type. In this work we remove the effect of primary consolidation and creep from the settlements and attempt to study the relationship between the residuals and rainfall. We find that consolidation was completed within 4 years since the end of construction (by 1985) and residuals of all points on the crest appear to follow the same evolution pattern. While no direct relationship could be established between the actual settlement observations and the rainfall, residuals seem to have maximum correlation with the cumulative rainfall height over a period of two months before the settlement measurement epoch. Our findings most likely represent a threshold value of rainfall above which the dam seems to be responding rather than a time duration over which rainfall plays an important role to the settlements of the dam.

Conference

Conference4th Joint International Symposium on Deformation Monitoring
CountryGreece
CityAthens
Period15/05/1917/05/19

Fingerprint

Dams
Rain
Consolidation
Creep
Clay
Aging of materials
Economics

Keywords

  • earthfill dam
  • rainfall
  • crest settlements
  • long-term geodetic monitoring

Cite this

Pytharouli, S., Zanganehasadabadi, N., & Michalis, P. (2019). Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements: the case of Pournari I dam (Greece). Abstract from 4th Joint International Symposium on Deformation Monitoring, Athens, Greece.
Pytharouli, Stella ; Zanganehasadabadi, Niloufar ; Michalis, Panagiotis. / Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements : the case of Pournari I dam (Greece). Abstract from 4th Joint International Symposium on Deformation Monitoring, Athens, Greece.
@conference{de44a2a566444ec9aacb985f6a0cfb21,
title = "Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements: the case of Pournari I dam (Greece)",
abstract = "Ageing earthfill dams become vulnerable to weather phenomena such as rainfall and flooding, with severe consequences, economic and life threatening, to the communities living downstream. A better understanding of their long-term behaviour and the factors affecting it, is crucial. A unique data set was used, consisting of the crest settlements of an earthfill, central clay core dam, the Pournari I dam in Greece, and the rainfall height values at the dam site between 1981 and 2015. The dam is 107 m high and its construction was completed in 1981. In previous studies the settlements of this dam, including rates, were found to be within limits and compliant with empirical relationships derived for dams of this type. In this work we remove the effect of primary consolidation and creep from the settlements and attempt to study the relationship between the residuals and rainfall. We find that consolidation was completed within 4 years since the end of construction (by 1985) and residuals of all points on the crest appear to follow the same evolution pattern. While no direct relationship could be established between the actual settlement observations and the rainfall, residuals seem to have maximum correlation with the cumulative rainfall height over a period of two months before the settlement measurement epoch. Our findings most likely represent a threshold value of rainfall above which the dam seems to be responding rather than a time duration over which rainfall plays an important role to the settlements of the dam.",
keywords = "earthfill dam, rainfall, crest settlements, long-term geodetic monitoring",
author = "Stella Pytharouli and Niloufar Zanganehasadabadi and Panagiotis Michalis",
year = "2019",
month = "5",
day = "15",
language = "English",
note = "4th Joint International Symposium on Deformation Monitoring ; Conference date: 15-05-2019 Through 17-05-2019",

}

Pytharouli, S, Zanganehasadabadi, N & Michalis, P 2019, 'Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements: the case of Pournari I dam (Greece)' 4th Joint International Symposium on Deformation Monitoring, Athens, Greece, 15/05/19 - 17/05/19, .

Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements : the case of Pournari I dam (Greece). / Pytharouli, Stella; Zanganehasadabadi, Niloufar; Michalis, Panagiotis.

2019. Abstract from 4th Joint International Symposium on Deformation Monitoring, Athens, Greece.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements

T2 - the case of Pournari I dam (Greece)

AU - Pytharouli, Stella

AU - Zanganehasadabadi, Niloufar

AU - Michalis, Panagiotis

PY - 2019/5/15

Y1 - 2019/5/15

N2 - Ageing earthfill dams become vulnerable to weather phenomena such as rainfall and flooding, with severe consequences, economic and life threatening, to the communities living downstream. A better understanding of their long-term behaviour and the factors affecting it, is crucial. A unique data set was used, consisting of the crest settlements of an earthfill, central clay core dam, the Pournari I dam in Greece, and the rainfall height values at the dam site between 1981 and 2015. The dam is 107 m high and its construction was completed in 1981. In previous studies the settlements of this dam, including rates, were found to be within limits and compliant with empirical relationships derived for dams of this type. In this work we remove the effect of primary consolidation and creep from the settlements and attempt to study the relationship between the residuals and rainfall. We find that consolidation was completed within 4 years since the end of construction (by 1985) and residuals of all points on the crest appear to follow the same evolution pattern. While no direct relationship could be established between the actual settlement observations and the rainfall, residuals seem to have maximum correlation with the cumulative rainfall height over a period of two months before the settlement measurement epoch. Our findings most likely represent a threshold value of rainfall above which the dam seems to be responding rather than a time duration over which rainfall plays an important role to the settlements of the dam.

AB - Ageing earthfill dams become vulnerable to weather phenomena such as rainfall and flooding, with severe consequences, economic and life threatening, to the communities living downstream. A better understanding of their long-term behaviour and the factors affecting it, is crucial. A unique data set was used, consisting of the crest settlements of an earthfill, central clay core dam, the Pournari I dam in Greece, and the rainfall height values at the dam site between 1981 and 2015. The dam is 107 m high and its construction was completed in 1981. In previous studies the settlements of this dam, including rates, were found to be within limits and compliant with empirical relationships derived for dams of this type. In this work we remove the effect of primary consolidation and creep from the settlements and attempt to study the relationship between the residuals and rainfall. We find that consolidation was completed within 4 years since the end of construction (by 1985) and residuals of all points on the crest appear to follow the same evolution pattern. While no direct relationship could be established between the actual settlement observations and the rainfall, residuals seem to have maximum correlation with the cumulative rainfall height over a period of two months before the settlement measurement epoch. Our findings most likely represent a threshold value of rainfall above which the dam seems to be responding rather than a time duration over which rainfall plays an important role to the settlements of the dam.

KW - earthfill dam

KW - rainfall

KW - crest settlements

KW - long-term geodetic monitoring

UR - http://jisdm2019.survey.ntua.gr/

M3 - Abstract

ER -

Pytharouli S, Zanganehasadabadi N, Michalis P. Investigation of the relationship between rainfall and long-term settlements of earthfill dams based on geodetic measurements: the case of Pournari I dam (Greece). 2019. Abstract from 4th Joint International Symposium on Deformation Monitoring, Athens, Greece.