The Utilization of Remote Sensing Imagery and Inverse Distance Weighted Scheme to Simulate the White Oil Effects on Soil Geotechnical Properties

L A Jawad,H W Abdulwadud,Z A Hameed

doi:10.24996/ijs.2021.62.8.34

Abstract

This research aims to utilize a complementarity of field excavations and laboratory works with spatial analyses techniques for a highly accurate modeling of soil geotechniques properties (i.e. having lower root mean square error value for the spatial interpolation). This was conducted, for a specified area of interest, firstly by adopting spatially sufficient and well distributed samples (cores). Then, in the second step, a simulation is performed for the variations in properties when soil is contaminated with commonly used industrial material, which is white oil in our case. Cohesive (disturbed and undisturbed) soil samples were obtained from three various locations inside Baghdad University campus in AL-Jadiriya section of Baghdad, Iraq. The unified soil categorization system (USCS) was adopted and soil was categorized as clayey silt of low plasticity (CL). The cores were contaminated in a synthetically manner using two specified values of white oil (5 and 10 % of its dry weight). Then, the samples were left for three days to certify homogeneity. The results of laboratory tests were enhanced by spatial interpolation mapping, using Inverse Distance Weighted scheme for normal soil samples and those with synthetic pollution. The liquid limit rates were raised slightly as contamination rates raised, while particle size was reduced; in contrary, shear strength parameter values were decreased.

Highlights

The increment of the extension of urbanized areas and the ascent in the number of industrial facilities yielded an increment in the levels of many chemical wastes that percolate into soil
According to the unconfined compressive strength resulted values, there is a reduction in the concentration of copper in the contaminated soil samples WO1 and WO2, which ranged between 80.5% and 93% compared with the value in the normal soil sample
The decrement in soil specific gravity rate yielded a small decrement in liquid limit that affected in a negative manner the geotechnical characteristics of clayey soil

Summary

Introduction

The increment of the extension of urbanized areas and the ascent in the number of industrial facilities yielded an increment in the levels of many chemical (solid or liquid) wastes that percolate into soil. These activities resulted (intentionally or unintentionally) in environmental pollution [1]. Some parameters of soil determine contaminated wastewater flow in it or in the groundwater’s main soil. These include, for example, permeability, porosity, and adsorption. While the second class of models consists of spatial interpolation raster or vector images The diagram below demonstrates this role

Objectives

Methods

Findings

Conclusion