Failure Risks at the Bashtapia Castle Due to Fluctuations in Tigris River Levels

Authors

  • Tareq H. Al-Rahal Geomatics Technology Engineering Department, Northern Technical University, Mosul, Iraq
  • Harith E. Ali Building and Construction Technology Engineering Department, Northern Technical University, Mosul, Iraq
  • Yasir M. Al-Badran Civil Engineering Department, College of Engineering, Mustansiriyah University, Baghdad, Iraq
Volume: 15 | Issue: 4 | Pages: 25363-25368 | August 2025 | https://doi.org/10.48084/etasr.11218

Received: 30 March 2025 | Revised: 6 May 2025 and 26 May 2025 | Accepted: 31 May 2025 | Online: 2 August 2025


Corresponding author: Yasir M. Al-Badran

Abstract

The current study investigates the stability of Bashtapia Castle (BC) in Mosul, northern Iraq, using two different methodological approaches. The first approach was applied during the early stages of the castle construction, before the Tigris River (TR) reaches the site. The second approach involves assessing the castle's stability under changing levels of the TR. These assessments focus on the stability of the castle trench slopes using Geo-Studio finite element software. The evaluation criteria were based on historical studies and field investigations. Unsaturated strength properties for ditch slope materials beneath the castle structure were obtained and incorporated into the Geo-Studio analysis, including water retention curves, hydraulic conductivity, modulus of elasticity, cohesion, and internal friction angle. The results indicate that the castle construction slightly decreased both the Factor of Safety (FoS) and the shear resistance of the trench slope. Meanwhile, the contact between the TR and the trench slope materials increased the Pore Water Pressure (PWP) and settlement, leading to a reduction in the FOS and shear resistance of these materials.

Keywords:

Bashtapia Castle, fatah formation, Tigris River levels, slope stability, geo-studio analysis

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References

J. Ashurst and F. G. Dimes, Conservation of Building and Decorative Stone. Routledge, 1998.

H. Al-Hadedy and S. Khattab, Deterioration Mechanism of Stones in Iraqi Historical Buildings. Noor Publishing, Germany, 2017.

V. K. Sissakian, N. Al-Ansari, and S. Knutsson, "Karstification Effect on the Stability of Mosul Dam and Its Assessment, North Iraq," Engineering, vol. 06, no. 02, pp. 84–92, 2014. DOI: https://doi.org/10.4236/eng.2014.62012

V. K. Sissakian, N. Adamo, N. Al-Ansari, S. Knutsson, and J. Laue, "Defects in Foundation Design Due to Miss-Interpretation of the Geological Data: A Case Study of Mosul Dam," Engineering, vol. 09, no. 07, pp. 683–702, 2017. DOI: https://doi.org/10.4236/eng.2017.97042

H. A. Al-Kawaz and Z. A. Aljubouri, "Dissolution Rate of Gypsum Under Different Environments," Iraqi National Journal of Earth Science (INJES), vol. 7, no. 2, pp. 11–18, Dec. 2007. DOI: https://doi.org/10.33899/earth.2007.39248

G.M., Hadeer, "Lamination of Mosul City, West Bank", MSc. Thesis, College of Science, Mosul University, Iraq, 1988.

"Soil Investigation for ALKADISYA bridge (5th Mosul Bridge)," National Center for Construction, Report No. 64, Part 3, 1985.

H. Djeffal and S. Belkacemi, "Slope Reliability Analysis in Locating and Observing the Direction of Failure Propagation," Engineering, Technology & Applied Science Research, vol. 13, no. 1, pp. 10209–10216, Feb. 2023. DOI: https://doi.org/10.48084/etasr.5509

N. Brakorenko, A. Leonova, and A. Nikitenkov, "Effect of soil water saturation on slope stability: Tomsk case study," E3S Web of Conferences, vol. 98, Jun. 2019, Art. no. 05005. DOI: https://doi.org/10.1051/e3sconf/20199805005

M. Wang and L. Li, "Slope Stability Analysis Considering Degradation of Soil Properties Induced by Intermittent Rainfall," Water, vol. 17, no. 6, Mar. 2025, Art. no. 814. DOI: https://doi.org/10.3390/w17060814

V. Renaud and M. Al Heib, "Probabilistic slope stability analysis: A novel distribution for soils exhibiting highly variable spatial properties," Probabilistic Engineering Mechanics, vol. 76, Apr. 2024, Art. no. 103586. DOI: https://doi.org/10.1016/j.probengmech.2024.103586

T. H. Al-Rahal and H. E. Ali, "Strengthening the Slope Beneath Bashtapia Castle at the Highest Expected Tigris River Level, " E3S Web of Conferences, vol. 427, Sep. 2023, Art. no. 01014. DOI: https://doi.org/10.1051/e3sconf/202342701014

Stress-deformation modeling with SIGMA/W 2007, 4th ed., Calgary, Alberta, Canada: Geo-slope International Ltd, 2013.

H. Q. P. Q. Pham and D. G. F. G. Fredlund, "Equations for the entire soil-water characteristic curve of a volume change soil," Canadian Geotechnical Journal, vol. 45, no 4, pp. 443-453. Apr. 2008. DOI: https://doi.org/10.1139/T07-117

N. Asmel, A. Ganiyu, H. Ali, A. Abdullah, and M. Al Saadi, "Water vapor diffusion: A control factor in the selection of environmentally friendly waste sites in Mosul city, Iraq," Engineering and Applied Science Research, vol. 49, pp. 327–339, May 2022.

D. G. Fredlund, H. Rahardjo, Soil Mechanics for Unsaturated Soils, John Wiley & Sons, Inc., 1993. DOI: https://doi.org/10.1002/9780470172759

T. H. Al-Rahal, S. I. A. Khattab, and B. J. Al-Sulaifanie, "Effect of static and dynamic loadings on unsaturated soil slope stability," AIP Conference Proceedings, vol. 2213, no. 1, Mar. 2020, Art. no. 020062. DOI: https://doi.org/10.1063/5.0000254

T. H. AL-Rahal, S. I. Khattab, and B. J. Al-Sulaifanie, "Effect of Rainfall and Dynamic Loading Conditions on Unsaturated Soil Slopes Stability," in Modern Applications of Geotechnical Engineering and Construction, vol 112, Springer 2021, pp. 51–62. DOI: https://doi.org/10.1007/978-981-15-9399-4_6

I. A. Abd, M. Y. Fattah, and H. Mekkiyah, "Relationship between the matric suction and the shear strength in unsaturated soil," Case Studies in Construction Materials, vol. 13, Dec. 2020, Art. no. e00441. DOI: https://doi.org/10.1016/j.cscm.2020.e00441

H. M. Mekkiyah, M. Y. Fattah, and I. A. Abd, "Suction Effect on Shear Strength of an Overconsolidated Unsaturated Soil", Journal of Engineering Science and Technology, vol. 16, no. 4, pp. 3562– 3575, 2021.

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How to Cite

[1]
T. H. Al-Rahal, H. E. Ali, and Y. M. Al-Badran, “Failure Risks at the Bashtapia Castle Due to Fluctuations in Tigris River Levels”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 4, pp. 25363–25368, Aug. 2025.

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