H.O. Nwankwoala

University of Port Harcourt

Publishing since 2010, latest 2025

Environmental Engineering
Water Science and Technology
Artificial Intelligence
Geochemistry and Petrology
Ocean Engineering
Geophysics

Their record on OpenAlex

Publications: 632010–2025
Citations: 640to those papers
h-index: 16i10-index 21
Field-weighted impact: 1.031.00 is the world average
World top 10%: 6%4 of 63 scored papers
Open access: 78%49 papers free to read

3 other works — preprints, datasets and the like — are listed but not counted.

By year

Papers, and the citations to them

Publications, left axisCitations to that year’s papers, right axis2026 still in progress

Career

On their papers

Every institution they have given on a paper.

Publications

63 in all

Environmental Impact of Petroleum Hydrocarbons from Artisanal Refineries on Surface Water in the Niger Delta
2025Journal of Global Ecology and EnvironmentJournalOpen accessSenior author2 citations10.56557/jogee/2025/v21i39384
Water Quality Index of Selected Borehole Water along Pipeline Routes in Parts of Obio/Akpor Local Government Area, Rivers State Nigeria

Download CV:PDFWord

Citations received each year

Peerford

To all their work, old papers included. Google Scholar also counts citations from theses, books and web pages, so its line runs higher.

What they work on

From the classification of each paper

Subfields

Environmental Engineering2337%
Water Science and Technology1321%
Artificial Intelligence1219%
Geochemistry and Petrology1219%
Ocean Engineering1016%
Geophysics813%
Global and Planetary Change610%
Soil Science610%
Analytical Chemistry46%
Civil and Structural Engineering46%

Life Sciences
Physical Sciences

Topics most written on

Groundwater and Watershed Analysis23
Groundwater and Isotope Geochemistry12
Geochemistry and Geologic Mapping11
Groundwater flow and contamination studies9
Water Quality and Pollution Assessment9
Geophysical and Geoelectrical Methods8
Soil erosion and sediment transport5
Water resources management and optimization5
Petroleum Processing and Analysis4
Aeolian processes and effects3
Flood Risk Assessment and Management3
Geophysical Methods and Applications3

Who they write with

Their most frequent co-authors, and the papers those co-authors share

Where their co-authors are

8% of their papers have a co-author abroad

papers co-written1234567Home

Most frequent partner countries

Brazil1
China1
Czechia1
Greece1
Namibia1
Netherlands1
United States1

Papers with at least one author in that country.

Institutions written with most

Rivers State UniversityNG15 papers
Federal University of Technology MinnaNG4 papers
Delta State UniversityNG3 papers
University of NigeriaNG3 papers
Gregory University UturuNG2 papers
Federal University Oye EkitiNG2 papers
Federal University of Technology OwerriNG2 papers
Federal University LokojaNG2 papers
Chinese Academy of SciencesCN1 paper
Czech University of Life Sciences PragueCZ1 paper

Where they publish

Zenodo (CERN European Organization for Nuclear Research)4
Engineering Heritage Journal3
Environmental Contaminants Reviews3
Pakistan Journal of Geology3
Water Conservation and Management3
Acta Geochimica2

Development goals addressed

From each paper’s title and abstract

6Clean water and sanitation23
15Life on land6
14Life below water5
11Sustainable cities and communities4
2Zero hunger3
13Climate action3

Most cited

Case Studies on Coastal Wetlands and Water Resources in Nigeria
European Journal of Sustainable Development
201249 citationsWorld top 10%Open access · Diamond
Groundwater resources of the Niger Delta: Quality implications and management considerations
International Journal of Water Resources and Environmental Engineering6
201448 citationsOpen access · Diamond
Evaluation of Heavy Metal in Soils From Enyimba Dumpsite in Aba, Southeastern Nigeria Using Contamination Factor and Geo-Accumulation Index

Journal of applied chemical science international

Assessment of the Impact of Artisanal Petroleum Refining on Surface Water Quality in Rivers State, Nigeria

2025Journal of applied chemical science internationalJournalOpen accessSenior author0 citations10.56557/jacsi/2025/v16i29368

Groundwater quality assessment around Lake Mkpitime, Nigeria, using integrated geophysical and hydrochemical approaches

2025Journal of tropical resources and sustainable science/Journal of Tropical Resources and Sustainable ScienceJournalOpen access0 citations10.47253/jtrss.v13i1.1517

The Physico-Chemical Characteristics of Groundwater Quality in Some Coastal Areas of Akwa Ibom State, Nigeria

2023International Journal of Environment and Climate ChangeJournalOpen accessSenior author1 citation10.9734/ijecc/2023/v13i113264

Health implications of selected heavy metals around hydrocarbon impacted sites in the Niger Delta: A preliminary investigation

2022Zenodo (CERN European Organization for Nuclear Research)JournalOpen accessFirst author0 citations10.5281/zenodo.6631143

Status of Public Water Supply Facilities in Port Harcourt Metropolis

2022International Journal of Environmental Protection and PolicyJournalOpen accessSenior author0 citations10.11648/j.ijepp.20221002.13

Hydrogeological and Geotechnical Assessment of Gully Erosion Sites in Parts of Uturu, Southeastern Nigeria

2022DOAJ (DOAJ: Directory of Open Access Journals)JournalOpen accessFirst author0 citations10.5281/zenodo.7426364

Assessment of Groundwater Quality in Parts of Port Harcourt Metropolis

2022Journal of Health and Environmental ResearchJournalOpen accessSenior author0 citations10.11648/j.jher.20220802.14

A REVIEW OF WETLANDS AND COASTAL RESOURCES OF THE NIGER DELTA: POTENTIALS, CHALLENGES AND PROSPECTS

2021Environment & Ecosystem scienceJournalOpen accessFirst authorCorresponding16 citations10.26480/ees.01.2021.37.46

Hydrogeology of Eastern Niger Delta: A Review

2020Journal of Water Resource and ProtectionJournalOpen accessSenior author36 citations10.4236/jwarp.2020.129045

Gully Erosion and Landslides in Southeastern Nigeria: Causes, Consequences and Control Measures

2019Global Journal of Engineering SciencesJournalOpen accessFirst authorCorresponding37 citations10.33552/gjes.2019.02.000541

DAM STRUCTURES AND TYPES IN NIGERIA: SUSTAINABILITY AND EFFECTIVENESS

2019Water Conservation and ManagementJournalOpen accessCorresponding26 citations10.26480/wcm.01.2019.20.26

Seasonal Variations in Imabolo Stream Water Quality in Ankpa Urban Area of Kogi State, Nigeria

2019International Journal of Environment and Climate ChangeJournalOpen access1 citation10.9734/ijecc/2019/v9i430110

Sub-Soil Properties of Hydrocarbon Contaminated Sites in Parts of the Eastern Niger Delta, Nigeria

2019American Research Journal of Earth ScienceJournalOpen accessFirst authorCorresponding1 citation10.21694/2642-3022.19005

The Presence of 2-Thiaadamantane in Niger Delta Oils may indicate Souring in Niger Delta Reservoirs

2019Pakistan Journal of GeologyJournalOpen accessSenior authorCorresponding0 citations10.2478/pjg-2019-0003

Assessment of Soil Properties for Flood Vulnerability Zones in Parts of Obio/Akpor Local Government Area, Rivers State, Nigeria

2019Zenodo (CERN European Organization for Nuclear Research)JournalOpen accessFirst author0 citations10.5281/zenodo.3381691

CHARACTERIZATION OF AQUIFERS IN PARTS OF ABIA STATE, SOUTHEASTERN NIGERIA

2018Earth Sciences PakistanJournalOpen accessSenior authorCorresponding16 citations10.26480/esp.01.2018.18.22

GEOLOGICAL AND HYDROGEOLOGICAL CHARACTERIZATION OF A HYDROCARBON IMPACTED SITE IN THE NIGER DELTA

2018Pakistan Journal of GeologyJournalOpen accessFirst authorCorresponding3 citations10.26480/pjg.01.2018.12.17

ASPECTS OF SHALLOW GROUNDWATER QUALITY IN CALABAR SOUTH, CROSS RIVER STATE, NIGERIA

2018Acta Chemica MalaysiaJournalOpen accessFirst authorCorresponding4 citations10.26480/acmy.01.2018.20.25

Application of Remote Sensing and Geographic Information Systems on Water Resources Management

2017Global Journal of Earth Science and EngineeringJournalOpen accessSenior author5 citations10.15377/2409-5710.2016.03.02.1

Geo-electrical Evaluation of the Effects of Waste Dump Sites on Groundwater in Eneka, Rivers State, Nigeria

2015Zenodo (CERN European Organization for Nuclear Research)JournalOpen accessSenior author0 citations10.5281/zenodo.21576773

Groundwater resources of the Niger Delta: Quality implications and management considerations

2014International Journal of Water Resources and Environmental EngineeringJournalOpen accessFirst author48 citations10.5897/ijwree2014.0500

Earth Sciences Pakistan

European Journal of Sustainable Development2

How it can be read

78% free to read

Diamond 32 · 51%Free to read and to publish
Gold 2 · 3%In an open-access journal
Hybrid 5 · 8%Open in a subscription journal
Bronze 4 · 6%Free to read, no open licence
Green 6 · 10%A copy in a repository
Closed 14 · 22%Behind a paywall

Who funds it

1 of 63 papers name a funder

Conselho Nacional de Desenvolvimento Científico e Tecnológico1
Fundação de Amparo à Pesquisa do Estado de São Paulo1
Research Centre for Gas Innovation1
Shell Brasil1
Universidade de São Paulo1

Energy and Environment Research11

201348 citationsOpen access · Hybrid

Gully Erosion and Landslides in Southeastern Nigeria: Causes, Consequences and Control Measures

Global Journal of Engineering Sciences1115

201937 citationsOpen access · Diamond