Dr. Adnan Aydin

Areas of Expertise

Engineering Geology, Rock Mechanics and Rock Engineering, Soil Mechanics and Ground Engineering, Hydrogeology, Applied Geophysics, Geotechnics.

Recent Projects


Field, laboratory and index testing of intact rock, rock-mass discontinuities, and soils;

Rock and soil microstructure, origin of jointing in rock masses, development of weathering profiles.


Origin and measurement of in-situ stress;

Characterization and classification of rock masses;

Analytical and numerical modeling of rock mass and soil behavior.


Mechanisms and susceptibility mapping of landslides and liquefaction.

Integrated liquefaction hazard map of Laoag City, Phillippines

Fracture-wellbore intersections along a wellbore and corresponding injection streamline patterns


Modeling flow and deformation in single fractures and fractured rock masses;

Well-testing in fractured rocks.


Predicting site response and ocean wave climate parameters from microtremor recordings;

Seismic refraction and reflection, electrical resistivity sounding (VES), and ground penetrating radar (GPR).

Typical tunnel section designed to pass through a collapse zone
In-situ stress measurement in urban setting


Monitoring tunnel induced deformations;

Design of ground excavations.


Subjective and random uncertainties in rock engineering;

Analytical and numerical modeling of flow and deformation of fractured rock masses;

Statistical data analysis.

Signal analysis approach to model rock fracture roughness profiles


Journal Articles

  1. Aydin A. 1997. Theory of single-well tests in acute fracture-wellbore systems. Hydrology, 194, 201-220.
  2. Aydin A. 1997. Influence of intersection angle at single-well flow tests in fracture-wellbore systems. Geotechnical Testing Journal, 20, 1,110-120.
  3. Aydin A, Duzgoren-Aydin NS, Malpas J. 2000. A review of igneous and metamorphic saprolites. Journal of Nepal Geological Soc., 22, 11-16.
  4. Aydin A, Egeli I. 2001. Stability of slopes cut in metasedimentary saprolites in Hong Kong. Bull. Eng. Geol. Env., 60, 315-319.
  5. Aydin A. 2001. Fracture void structure: implications for flow, transport and deformation. Environmental Geology, 40, 6, 672-677.
  6. Malpas J, Duzgoren-Aydin NS, Aydin A. 2001. Behaviour of chemical elements during weathering of pyroclastic rocks, Hong Kong. Environment International, 26, 359-368.
  7. Aydin A, Duzgoren-Aydin NS. 2002. Indices for scaling and predicting weathering-induced changes in rock properties. Environmental & Engineering Geoscience, 8, 2, 121-135.
  8. Duzgoren-Aydin NS, Aydin A, Malpas J. 2002. Re-assessment of chemical weathering indices: case study from pyroclastic rocks of Hong Kong. Engineering Geology, 63, 99-119.
  9. Duzgoren-Aydin NS, Aydin A, Malpas J. 2002. Distribution of clay minerals along a weathered pyroclastic rock profile. Catena, 50, 17-41.
  10. Wen BP, Aydin A, Duzgoren-Aydin NS. 2002. A comparative study of particle size analyses by sieve-hydrometer and laser diffraction methods. Geotechnical Testing Journal, 25, 4, 434-442.
  11. Wen BP, Aydin A. 2003. Microstructural study of a natural slip zone: quantification and deformation history. Engineering Geology, 68, 289-317.
  12. Duzgoren-Aydin NS, Aydin A. 2003. Chemical heterogeneities of weathered igneous profiles: implications for chemical indices. Environmental & Engineering Geoscience, 9, 4, 363-378.
  13. Wen BP, Aydin A. 2004. Deformation history of a landslide slip zone in light of soil microstructure. Environmental & Engineering Geoscience, 10, 2, 123-150.
  14. Aydin A. 2004. Fuzzy set approaches to the classification of rock masses. Engineering Geology, 74, 3-4, 227-245.
  15. Aydin A, Ozbek A, Cobanoglu I. 2004. Tunneling in difficult ground: a case study from Dranaz tunnel, Sinop-Turkey. Engineering Geology, 74, 3-4, 293-301.
  16. Basu A, Aydin A. 2004. A method for normalization of Schmidt hammer rebound values. Int. J. Rock Mech. & Mining Sci., 41, 1211-1214.
  17. Wen BP, Duzgoren-Aydin NS, Aydin A. 2004. Geochemical characteristics of the slip zones of a landslide in granitic saprolite, Hong Kong: implications for their development and microenvironments. Environmental Geology, 47, 140-154.
  18. Wen BP, Aydin A. 2005. Mechanism of a rainfall-induced slide-debris flow: constraints from microstructure of its slip zone. Engineering Geology, 78, 69-88.
  19. Aydin A, Basu A. 2005. The Schmidt hammer in rock material characterization. Engineering Geology, 81, 1-14.
  20. Aydin A, Basu A. 2005. The use of Brazilian test as a quantitative measure of rock weathering. Rock Mechanics & Rock Engineering, 39, 1, 77-85.
  21. Aydin A. 2006. Stability of saprolitic slopes: nature and role of field scale heterogeneities. Natural Hazards & Earth System Sciences, 6, 89-96.
  22. Basu A, Aydin A. 2006. An Evaluation of Ultrasonic Testing in Rock Material Characterization. Geotechnical Testing Journal, 29, 2, 117-125.
  23. Duzgoren-Aydin NS, Wong CS, Song Z, Aydin A, Li XD, You M. 2006. Fate of heavy metal contaminants in road dusts and gully sediments in Guangzhou, SE China: A chemical and mineralogical assessment. Human & Ecological Risk Assessment, 12, 2, 374-389.
  24. Basu A, Aydin A. 2006. Predicting uniaxial compressive strength by point load test: significance of cone penetration. Rock Mechanics & Rock Engineering, 39, 5, 483-490.
  25. Duzgoren-Aydin NS, Aydin A. 2006. Chemical and mineralogical heterogeneities of weathered igneous profiles: implications for landslides studies. Natural Hazards & Earth System Sciences, 6, 315-322.
  26. Duzgoren-Aydin NS, Wong CS, Aydin A, Song Z, You M. 2006. Heavy metal contamination and distribution of Guangzhou, SE China. Environmental Geochemistry & Health, 28, 4, 375-391.
  27. Wong CS, Duzgoren-Aydin NS, Aydin A, Wong HM. 2006. Sources and trends of environmental mercury emissions in Asia. Total Science of Environment, 368, 2-3, 649-662.
  28. Wong CS, Wu SC, Duzgoren-Aydin NS, Aydin A, Wong MH. 2007. Trace metal contamination of sediments in an e-waste processing village in China. Environmental Pollution, 145, 2, 434-442.
  29. Wong CSC, Duzgoren-Aydin NS, Aydin A, Wong MH . 2007. Evidence of excessive releases of metals from primitive e-waste processing in Guiyu, China. Environmental Pollution. 148, 62-72.
  30. Beroya MAA, Aydin A. 2007. First-level liquefaction hazard mapping of Laoag City, Northern Philippines. Natural Hazards, 43, 415-430.
  31. Wen BP, Aydin A, N.S. Duzgoren-Aydin, Y.R. Li, H.Y. Chen, S.D. Xiao. 2007. Residual Strength of Slip Zones of Large Landslides in the Three Gorges Area, China. Engineering Geology, 93, 82-98.
  32. Beroya MAA, Aydin A. 2008. Seismic hazard analysis of Laoag City, Northern Philippines, for liquefaction potential assessment. Engineering Geology, 96, 28-42.
  33. Li CB, Aydin A, Shi XJ, W XZ. 2008. Comparison and modification of rock creep models. Chinese Journal of Experimental Mechanics. 23, 1, paper no. 12. (in Chinese with English abstracts)
  34. Aydin A. 2009. Suggested method for determination of the Schmidt hammer rebound hardness: Revised version. Int. J. Rock Mech. & Mining Sci. 46, 3, 627-634.
  35. Duzgoren-Aydin NS, Aydin A. 2009. Distribution of rare earth elements and oxyhydroxide phases within a weathered felsic igneous profile in Hong Kong. Journal of Asian Earth Sciences. 34, 1, 1-9.
  36. Shi XJ, Li CB, Aydin A, Huang JH, Zhao C. 2009. Viscoelastic model with variable parameters for earth medium. Chinese Journal of Geophysics, 52, 1, 33-39. (English Edition)
  37. Beroya MAA, Aydin A, Katzenbach R. 2009. Insight into the effects of clay mineralogy on the cyclic behavior of silt-clay mixtures. Engineering Geology, 106, 3-4, 154-162.
  38. Beroya MAA, Aydin A, Tiglao R, Lasala M. 2009. Use of microtremor in liquefaction hazard mapping. Engineering Geology, 107, 3-4, 140-153.
  39. Li YR, Aydin A. 2010. Behavior of rounded granular materials in direct shear: mechanisms and quantification of fluctuations. Engineering Geology, 115, 96–104.
  40. Beroya MAA, Aydin A. 2010. A new approach to liquefaction hazard zonation: Application to Laoag City, Northern Philippines. Soil Dynamics and Earthquake Engineering, 30, 11, 1338-1351.
  41. Mortimer L, Aydin A, Simmons CT, Love AJ. 2011. Is the in-situ stress field important to Groundwater Flow in Shallow Fractured Rock Aquifers? Journal of Hydrology, 399 (3-4), 185-200.
  42. Mortimer L, Aydin A, Simmons CT, Heinson G, Love AJ. 2011. The role of in situ stress determining hydraulic connectivity in a fractured rock aquifer. Hydrogeology Journal, 19 (7) pp 1,293–312.
  43. Li YR, Aydin A, Xiang XQ, Ju NP, Zhao JJ, Ozbek A. 2012. Landslide susceptibility mapping and evaluation along a river valley in China. Acta Geologica Sinica (English Edition), 86, 4, 1022-1030.
  44. Li YR, Aydin A, Xu Q, Chen J. 2012. Constitutive behavior of binary mixtures of kaolin and glass beads in direct shear. KSCE Journal of Civil Engineering, 16, 7, 1152-1159.
  45. Li YR, Wen BP, Aydin A, Ju NP. 2013. Ring shear tests on slip zone soils of three giant landslides in the Three Gorges Project area. Engineering Geology, 154, 106–115.
  46. Li YR, Aydin A. 2013. Shear zone structures and stress fluctuations in large ring shear tests. Engineering Geology, 167, 6–13.
  47. Aydin A. 2014. Upgraded ISRM Suggested Method for Determining Sound Velocity by Ultrasonic Pulse Transmission Technique. Rock Mechanics and Rock Engineering, 47, 1, 255-259.
  48. Aydin A, Ozbek A, Acar A. 2014. Geomechanical characterization, 3-D optical monitoring and numerical modeling in Kirkgecit-1 tunnel, Turkey. Engineering Geology, 181, 38-47.
  49. Guo Z, Aydin A, Kuszmaul JS. 2014. Microtremor recordings in Northern Mississippi. Engineering Geology, 179, 146–157.
  50. Guo Z, Aydin A. 2015. Double-frequency microseisms in ambient noise recorded in Mississippi. Bulletin Seismological Society of America, 105, 3, 1-22.
  51. Pickering C, Aydin A. 2015. Modeling roughness of rock discontinuity surfaces. Rock Mechanics and Rock Engineering, 49, 7, 2959-2965.
  52. Guo Z, Aydin A. 2016. A modified HVSR method to evaluate site effect in Northern Mississippi considering ocean wave climate. Engineering Geology, 200, 104–113.
  53. Li YR, Xu Q, Aydin A. 2016. Uncertainties in estimating the roughness coefficient of rock fracture surfaces. Bull Eng Geol Environ. 1-13.