Geotechnical Assessment of Umuezealaibe, Isu-Njaba Gully Erosion Site in Isu Local Government Area, Imo State of Nigeria

Abstract

The geotechnical assessment of the Umuezealaibe, Isu-Njaba gully erosion site represents a comprehensive investigation into the factors contributing to the instability of this critical geological feature. Through a combination of rigorous field surveys, extensive laboratory analyses, and advanced stability assessments, this study aimed to unravel the underlying causes of the erosion phenomenon. Representative soil samples were collected using soil auger and subjected to a battery of tests, including index property analyses, sieve analyses for grain size distribution, and shear strength tests. The result of the study revealed the following: topography of the land shows a high sloppiness which makes it highly susceptible to erosion, predominantly that of weak clay and loose sandy clays, specific gravity of the collected samples ranges from 2.59 to 2.68, averaging at 2.65. The soil exhibited average natural moisture content and bulk unit weight, measuring 15.0% and 1.93 mg/m

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