Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador

Camilo  Zapata; E A Holcombe; Paul J Vardanega; Eliana  Jiménez

Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador

Camilo Zapata, E A Holcombe^*, Paul J Vardanega, Eliana Jiménez

^*Corresponding author for this work

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Abstract

Rainfall-triggered landslides are increasingly a concern in rapidly urbanising areas around the globe. Assessing the stability of slopes is important for geotechnical engineers and planners working in these regions. Saturated hydraulic conductivity is key parameter for assessing the hydrological drivers of slope instability. This paper presents a recent citizen-science case study in Quito, Ecuador, in which saturated hydraulic conductivity measurements were taken in the field on a fine-grained volcanic sediment, often referred to as cangahua, were obtained as part of the Tomorrow’s Cities project on urban multi-hazards and disaster risk management. These data are then used along with a recent soil database of Quito soils (Quito/GEO-299) and other locally obtained soil data and the Combined Hydrology And Stability Model (CHASM) to assess the stability of slopes in a hillside community in South Quito. The paper focuses on the variability of key slope stability parameters, including saturated hydraulic conductivity to assess the plausible ranges of behaviour for slopes in this area.

Original language	English
Title of host publication	European Geotechnical Engineering - Unity and Diversity
Subtitle of host publication	Proceedings of the 17th Danube–European Conference on Geotechnical Engineering, 7-9 June 2023, Bucharest, Romania
Editors	Irina Lungu, Iancu-Bogdan Teodoru, Loretta Batali
Place of Publication	Işai, România
Publisher	Politehnium Publishing House
Pages	773-780
Number of pages	8
Volume	2
ISBN (Print)	9789736215223
Publication status	Published - 7 Jun 2023
Event	17th Danube - European Conference on Geotechnical Engineering - Bucharest, Romania Duration: 7 Jun 2023 → 9 Jun 2023

Conference

Conference	17th Danube - European Conference on Geotechnical Engineering
Abbreviated title	17DECGE
Country/Territory	Romania
City	Bucharest
Period	7/06/23 → 9/06/23

Keywords

Slope stability
Cangahua
Hydraulic Conductivity
Urbanisation
Quito

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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5 Conference Contribution (Conference Proceeding)

Co-producing and communicating landslide knowledge for risk-informed urban development in Quito
Zapata, C., Holcombe, E. A., Vardanega, P. J. & Jiménez, E., 3 Dec 2024, (E-pub ahead of print) Proceedings of the 17th Pan-American Conference on Soil Mechanics and Geotechnical Engineering (XVII PCSMGE), and 2nd Latin-American Regional Conference of the International Association for Engineering Geology and the Environment (IAEG), La Serena Chile, 2024. International Society for Soil Mechanics and Geotechnical Engineering, 9 p.
Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Open Access
File
Drone systems for landslide hazard assessment in Quito
Zapata, C., Holcombe, E. A., Vardanega, P. J. & Jiménez, E., 3 Dec 2024, (E-pub ahead of print) Proceedings of the 17th Pan-American Conference on Soil Mechanics and Geotechnical Engineering (XVII PCSMGE), and 2nd Latin-American Regional Conference of the International Association for Engineering Geology and the Environment (IAEG), La Serena Chile, 2024. International Society for Soil Mechanics and Geotechnical Engineering, 10 p.
Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Open Access
File
Slope stability modelling of urbanisation scenarios for communities in north Quito, Ecuador
Hen-Jones, R., Zapata, C., Jiménez, E., Holcombe, E. A. & Vardanega, P. J., 17 Sept 2024, Geotechnical Engineering Challenges to Meet Current and Emerging Needs of Society: Proceedings of the XVIII European Conference on Soil Mechanics and Geotechnical Engineering, 26–30 August 2024, Lisbon, Portugal. Guerra, N., Fernandes, M. M., Ferreira, C., Correia, A. G., Pinto, A. & Sêco e Pinto, P. (eds.). 1st ed. Abingdon, Oxon: CRC Press/Balkema, Taylor & Francis Group, p. 1146-1149 4 p.
Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Open Access
File
48 Downloads (Pure)

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Tomorrow's Cities
Zapata, C. (Researcher)
Project: Research
Tomorrow's Cities - phase 2 social science
Holcombe, E. A. (Principal Investigator)
1/04/22 → 31/03/23
Project: Research

Cite this

Zapata, C., Holcombe, E. A., Vardanega, P. J., & Jiménez, E. (2023). Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador. In I. Lungu, I.-B. Teodoru, & L. Batali (Eds.), European Geotechnical Engineering - Unity and Diversity: Proceedings of the 17th Danube–European Conference on Geotechnical Engineering, 7-9 June 2023, Bucharest, Romania (Vol. 2, pp. 773-780). Politehnium Publishing House.

Zapata, Camilo ; Holcombe, E A ; Vardanega, Paul J et al. / Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador. European Geotechnical Engineering - Unity and Diversity: Proceedings of the 17th Danube–European Conference on Geotechnical Engineering, 7-9 June 2023, Bucharest, Romania. editor / Irina Lungu ; Iancu-Bogdan Teodoru ; Loretta Batali. Vol. 2 Işai, România : Politehnium Publishing House, 2023. pp. 773-780

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title = "Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador",

abstract = "Rainfall-triggered landslides are increasingly a concern in rapidly urbanising areas around the globe. Assessing the stability of slopes is important for geotechnical engineers and planners working in these regions. Saturated hydraulic conductivity is key parameter for assessing the hydrological drivers of slope instability. This paper presents a recent citizen-science case study in Quito, Ecuador, in which saturated hydraulic conductivity measurements were taken in the field on a fine-grained volcanic sediment, often referred to as cangahua, were obtained as part of the Tomorrow{\textquoteright}s Cities project on urban multi-hazards and disaster risk management. These data are then used along with a recent soil database of Quito soils (Quito/GEO-299) and other locally obtained soil data and the Combined Hydrology And Stability Model (CHASM) to assess the stability of slopes in a hillside community in South Quito. The paper focuses on the variability of key slope stability parameters, including saturated hydraulic conductivity to assess the plausible ranges of behaviour for slopes in this area.",

keywords = "Slope stability, Cangahua, Hydraulic Conductivity, Urbanisation, Quito",

author = "Camilo Zapata and Holcombe, \{E A\} and Vardanega, \{Paul J\} and Eliana Jim{\'e}nez",

year = "2023",

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language = "English",

isbn = "9789736215223",

volume = "2",

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booktitle = "European Geotechnical Engineering - Unity and Diversity",

publisher = "Politehnium Publishing House",

note = "17th Danube - European Conference on Geotechnical Engineering, 17DECGE ; Conference date: 07-06-2023 Through 09-06-2023",

}

Zapata, C , Holcombe, EA , Vardanega, PJ & Jiménez, E 2023, Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador. in I Lungu, I-B Teodoru & L Batali (eds), European Geotechnical Engineering - Unity and Diversity: Proceedings of the 17th Danube–European Conference on Geotechnical Engineering, 7-9 June 2023, Bucharest, Romania. vol. 2, Politehnium Publishing House, Işai, România, pp. 773-780, 17th Danube - European Conference on Geotechnical Engineering, Bucharest, Romania, 7/06/23.

Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador. / Zapata, Camilo ; Holcombe, E A ; Vardanega, Paul J et al.
European Geotechnical Engineering - Unity and Diversity: Proceedings of the 17th Danube–European Conference on Geotechnical Engineering, 7-9 June 2023, Bucharest, Romania. ed. / Irina Lungu; Iancu-Bogdan Teodoru; Loretta Batali. Vol. 2 Işai, România: Politehnium Publishing House, 2023. p. 773-780.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

TY - GEN

T1 - Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador

AU - Zapata, Camilo

AU - Holcombe, E A

AU - Vardanega, Paul J

AU - Jiménez, Eliana

PY - 2023/6/7

Y1 - 2023/6/7

N2 - Rainfall-triggered landslides are increasingly a concern in rapidly urbanising areas around the globe. Assessing the stability of slopes is important for geotechnical engineers and planners working in these regions. Saturated hydraulic conductivity is key parameter for assessing the hydrological drivers of slope instability. This paper presents a recent citizen-science case study in Quito, Ecuador, in which saturated hydraulic conductivity measurements were taken in the field on a fine-grained volcanic sediment, often referred to as cangahua, were obtained as part of the Tomorrow’s Cities project on urban multi-hazards and disaster risk management. These data are then used along with a recent soil database of Quito soils (Quito/GEO-299) and other locally obtained soil data and the Combined Hydrology And Stability Model (CHASM) to assess the stability of slopes in a hillside community in South Quito. The paper focuses on the variability of key slope stability parameters, including saturated hydraulic conductivity to assess the plausible ranges of behaviour for slopes in this area.

AB - Rainfall-triggered landslides are increasingly a concern in rapidly urbanising areas around the globe. Assessing the stability of slopes is important for geotechnical engineers and planners working in these regions. Saturated hydraulic conductivity is key parameter for assessing the hydrological drivers of slope instability. This paper presents a recent citizen-science case study in Quito, Ecuador, in which saturated hydraulic conductivity measurements were taken in the field on a fine-grained volcanic sediment, often referred to as cangahua, were obtained as part of the Tomorrow’s Cities project on urban multi-hazards and disaster risk management. These data are then used along with a recent soil database of Quito soils (Quito/GEO-299) and other locally obtained soil data and the Combined Hydrology And Stability Model (CHASM) to assess the stability of slopes in a hillside community in South Quito. The paper focuses on the variability of key slope stability parameters, including saturated hydraulic conductivity to assess the plausible ranges of behaviour for slopes in this area.

KW - Slope stability

KW - Cangahua

KW - Hydraulic Conductivity

KW - Urbanisation

KW - Quito

M3 - Conference Contribution (Conference Proceeding)

SN - 9789736215223

VL - 2

SP - 773

EP - 780

BT - European Geotechnical Engineering - Unity and Diversity

A2 - Lungu, Irina

A2 - Teodoru, Iancu-Bogdan

A2 - Batali, Loretta

PB - Politehnium Publishing House

CY - Işai, România

T2 - 17th Danube - European Conference on Geotechnical Engineering

Y2 - 7 June 2023 through 9 June 2023

ER -

Zapata C , Holcombe EA , Vardanega PJ, Jiménez E. Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador. In Lungu I, Teodoru IB, Batali L, editors, European Geotechnical Engineering - Unity and Diversity: Proceedings of the 17th Danube–European Conference on Geotechnical Engineering, 7-9 June 2023, Bucharest, Romania. Vol. 2. Işai, România: Politehnium Publishing House. 2023. p. 773-780

Modelling the effect of hydraulic conductivity variability on slope stability calculations for a site in South-East Quito, Ecuador

Abstract

Conference

Keywords

UN SDGs

Access to Document

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Research output

Co-producing and communicating landslide knowledge for risk-informed urban development in Quito

Drone systems for landslide hazard assessment in Quito

Slope stability modelling of urbanisation scenarios for communities in north Quito, Ecuador

Projects

Tomorrow's Cities

Tomorrow's Cities - phase 2 social science

Cite this