Skip to content
T

Tammy Morrison

0009-0006-6238-5163

Publications (9)

Geotechnical Assessment of Subsoil Conditions for Foundation Design of the Overhead Bridge along Olu Obasanjo Road, Port Harcourt, Rivers State, Nigeria

Tammy Morrison, E. O. Okpobiri & Erefama Ekine Esonanjor · Asian Soil Research Journal · 2026

Aim: This study aimed to characterize the subsoil geotechnical conditions along Olu Obasanjo Road in Port Harcourt, Rivers State, Nigeria, and to evaluate their implications for the foundation design of a proposed overhead bridge. Study Design: The work was based on an integrated...

Open access Research Article 10.9734/asrj/2026/v10i3240

Geotechnical Site Characterization and Bearing Capacity Assessment for a Proposed Two-Storey Building at Nembe, Bayelsa State

Tammy Morrison, Erefama Ekine Esonanjor & P. E. Onyemachi · Journal of Geography, Environment and Earth Science International · 2026

Aim: This study aimed to characterize the subsurface geotechnical properties and evaluate the bearing capacity and settlement behaviour of soils for the foundation design of a proposed two-storey building at Nembe, Bayelsa State, Niger Delta, Nigeria. Study Design:  The study emp...

Open access Research Article 10.9734/jgeesi/2026/v30i81099

Integrated Assessment of Subsoil Corrosivity and Hydrogeological Characteristics Using Vertical Electrical Sounding (VES): A Case Study of Oron, Akwa Ibom State, Nigeria

Tammy Morrison & Erefama Ekine Esonanjor · Physical Science International Journal · 2026

Background: Understanding subsoil corrosivity is critical in foundation and infrastructure design, particularly for projects involving buried metallic structures such as pipelines, storage tanks, foundation reinforcements, and cathodic protection systems. Despite the extensive ap...

Open access Research Article 10.9734/psij/2026/v30i3948

An Evaluation of a Marginal Land’s Geological Engineering Properties in Borikiri Sandfill, Port Harcourt Nigeria

Tammy Morrison & Erefama Ekine Esonanjor · Archives of Current Research International · 2023

Aim: The aim of this study was to assess the geological engineering properties of                                  a marginal land in Borikiri Sandfill, Port Harcourt, Nigeria, using both field and laboratory investigations. Study Design: The study design involved the drilling of...

Open access Research Article 10.9734/acri/2023/v23i4567

Evaluation of Subsoil Competence for Foundation Design in Rumuokwuta, Port Harcourt, Eastern Niger Delta

Tammy Morrison & Erefama Ekine Esonanjor · Asian Journal of Physical and Chemical Sciences · 2022

Aim: A subsurface geotechnical investigation was carried out for the purpose of establishing the depth of competent soil for foundation design and construction of a one-storey building. Study Design: The study was aimed at assessing the subsoil competence for a foundation design...

Open access Research Article 10.9734/ajopacs/2022/v10i4188

Assessment of Geotechnical Investigation Techniques for Evaluating Planning and Parametric Mapping in the Niger Delta Sub-region of Nigeria

Tammy Morrison, Teme Songo Clifford & Erefama Ekine Esonanjor · Asian Journal of Geological Research · 2022

Aim: The goal of this study was to generate geological engineering parameters that could be used for Development planning and control purposes. Study Design: The study was designed to use the various parameter values to produce iso-contour maps using Surfer II computer software....

Open access Research Article

Fresh Water Depth Determination and Mapping of Saline/Fresh Water Interphase Using Geographical Logs in Coastal Aquifers of Niger Delta, Nigeria

Tammy Morrison, Juliet Kosisochukwu & Erefama Ekine Esonanjor · Asian Journal of Geological Research · 2022

The introduction of salt/saline water into boreholes has been a major issue in groundwater utilisation in the Niger Delta.  Aim: The study was aimed at determining the depth of saline/saline water and freshwater aquifers in the region. Study Design:  The study was designed to use...

Open access Research Article

Integrated Geo-environmental Assessment of Heavy Metal Contamination in a Municipal Landfill System: A Case Study from Aluu, Obio-Akpor Local Government Area

Erefama Ekine Esonanjor, Tammy Morrison & B. Kumte · International Journal of Environment and Climate Change · 2026

Background: Unregulated dumpsites driven by poor waste management infrastructure facilitate the release and leaching of persistent, toxic heavy metals into soils and groundwater, posing significant long-term environmental and public health risks, particularly in regions such as N...

Open access Research Article 10.9734/ijecc/2026/v16i55437

Physicochemical Characterization and Spatial Variability of Leachate and Its Environmental Implications at Aluu Municipal Dumpsite, Port Harcourt, Nigeria

Erefama Ekine Esonanjor, C. Akpelu & Tammy Morrison · Asian Journal of Physical and Chemical Sciences · 2026

Background: Leachate from open, unlined landfills, particularly in tropical regions like the Niger Delta, contains high levels of toxic and poorly biodegradable contaminants. Its infiltration into soil and water systems poses serious environmental and public health risks. Aim: Th...

Open access Research Article 10.9734/ajopacs/2026/v14i2308