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109461

Evaluating the Spatial Distribution of some Soil Geotechnical Properties Using Various Interpolation Methods (Case Study: Sulaimani Province, Iraq)

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Last updated: 04 Jan 2025

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Abstract

Soilgeotechnical parameters are important inputs for the prediction of ground suitability for construction projects. The aim of the study is the evaluation of spatial distribution of some soil geotechnical characteristics for Sulaimani governorate, northern Iraq which has a semi-arid climate. Sixty different soil specimens were taken from a distance of 2.0 meters from natural ground surface, around the Sulaimani city which are suitable for resettlement purposes. Several required laboratory experiments were performed to obtain some engineering properties of the collected soils according to ASTM standards, namely field water content, field wet density, initial void ratio (IVR), and degree of saturation (DS). Three different interpolation methods namely Inverse Distance Weighted (IDW), and Thin Plate Spline (TPS), which are deterministic interpolation methods in addition to and one geostatistical method, Ordinary Kriging (OK), were applied. Cross validation and accuracy assessment of model performance are also applied and analyzed. In general, the geostatistical method performance was compared with the deterministic methods. Ok method found to be more accurate and less biased method than the other two methods, which has lower RMSE (1.38%, 11.33%, 0.07 and 0.82 gm
cm-3) and ME (-0.63%, 0.94%, -0.16 and 0.3 gm cm-3) for water content, DS, IVR and wet density respectively. According to the interpolation maps 65 to 70 % of study area is likely suitable for construction purposes compare to the other 30 to 35 %, which need some precautions for the suitability issue for construction projects. The results yielded in the reliability of the obtained soil geotechnical properties from geospatial maps, which may importantly engage to suitable engineering management application and modeling of land use.

DOI

10.21608/jssae.2020.109461

Keywords

Soil Geotechnical properties, interpolation, IDW, TPS, Ordinary Kriging

Authors

First Name

Peshawa

Last Name

Najmaddin

MiddleName

Mustafa

Affiliation

Natural Resources Department, College of Agricultural Engineering Sciences, University of Sulaimani, Sulaimani City, Kurdistan Region, Iraq; peshawa.najmaddin@univsul.edu.iq (P.M.N.)

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First Name

Nihad

Last Name

Salih

MiddleName

Bahaaldeen

Affiliation

Water Resources Engineering Department, College of Engineering, University of Sulaimani, Sulaimani City, Kurdistan Region, Iraq; nihad.salih@univsul.deu.iq (N.B.S.)

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First Name

Tavga

Last Name

Abdalla

MiddleName

Aram

Affiliation

Civil Engineering Department, College of Engineering, University of Sulaimani, Sulaimani City, Kurdistan Region, Iraq; tavga.abdalla@univsul.edu.iq (T.A.A)

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Volume

11

Article Issue

7

Related Issue

16485

Issue Date

2020-07-01

Receive Date

2020-07-08

Publish Date

2020-07-01

Page Start

275

Page End

281

Print ISSN

2090-3685

Online ISSN

2090-3766

Link

https://jssae.journals.ekb.eg/article_109461.html

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https://jssae.journals.ekb.eg/service?article_code=109461

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6

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Original Article

Type Code

889

Publication Type

Journal

Publication Title

Journal of Soil Sciences and Agricultural Engineering

Publication Link

https://jssae.journals.ekb.eg/

MainTitle

Evaluating the Spatial Distribution of some Soil Geotechnical Properties Using Various Interpolation Methods (Case Study: Sulaimani Province, Iraq)

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Article

Created At

22 Jan 2023