A new modelling framework to assess changes in groundwater level

I Kalu, CE Ndehedehe, O Okwuashi, AE Eyoh… - Journal of Hydrology …, 2022 - Elsevier
Abstract Study region The Southern African region consists of ten countries including,
Angola, Zambia, Malawi, Namibia, Botswana, Zimbabwe, Mozambique, South Africa …

Evaluating groundwater storage change and recharge using GRACE data: A case study of aquifers in Niger, West Africa

SA Barbosa, ST Pulla, GP Williams, NL Jones… - Remote Sensing, 2022 - mdpi.com
Accurately assessing groundwater storage changes in Niger is critical for long-term water
resource management but is difficult due to sparse field data. We present a study of …

An assimilated deep learning approach to identify the influence of global climate on hydrological fluxes

I Kalu, CE Ndehedehe, O Okwuashi, AE Eyoh… - Journal of …, 2022 - Elsevier
The rapid acceleration of the global water cycle caused by changes in global climate trigger
complex processes that make conventional machine learning techniques limited in …

[HTML][HTML] Reconstructing terrestrial water storage anomalies using convolution-based support vector machine

I Kalu, CE Ndehedehe, O Okwuashi, AE Eyoh… - Journal of Hydrology …, 2023 - Elsevier
Abstract Study region The Congo River basin in west-central Africa Study focus Traditional
machine learning algorithms are recently being replaced by integrated learning techniques …

Exploiting earth observations to enable groundwater modeling in the data-sparse Region of Goulbi Maradi, Niger

SA Barbosa, NL Jones, GP Williams, B Mamane… - Remote Sensing, 2023 - mdpi.com
Groundwater modeling is a useful tool for assessing sustainability in water resources
planning. However, groundwater models are difficult to construct in regions with limited data …

Advancements in remote sensing technologies for accurate monitoring and management of surface water resources in Africa: an overview, limitations, and future …

M Sigopi, C Shoko, T Dube - Geocarto International, 2024 - Taylor & Francis
This review presents a comprehensive examination of recent advancements in utilizing multi-
date satellite data to analyze spatial and temporal variations in seasonal and inter-annual …

[HTML][HTML] Machine learning assessment of hydrological model performance under localized water storage changes through downscaling

I Kalu, CE Ndehedehe, VG Ferreira, MJ Kennard - Journal of Hydrology, 2024 - Elsevier
The coarse spatial resolution of the Gravity Recovery and Climate Experiment (GRACE)
data has limited its application in the management of local-scale water resources. To …

Integration of satellite geodetic observations for regional geoid modeling using remove-compute-restore technique

I Kalu, CE Ndehedehe, O Okwuashi, AE Eyoh - Earth Science Informatics, 2022 - Springer
Advanced satellite geodetic systems have contributed to improving knowledge on changes
in global gravity fields in recent years. These systems offer profound opportunities in the …

Tensor partial least squares for hyperspectral image classification

O Okwuashi, CE Ndehedehe… - Geocarto International, 2022 - Taylor & Francis
A hyperspectral image is classically a three-way (or tensor) block of data. In order to extract
information from it, it has to be classified using image classifiers. Since classifiers are …

[HTML][HTML] Estimating the seven transformational parameters between two geodetic datums using the steepest descent algorithm of machine learning

I Kalu, CE Ndehedehe, O Okwuashi, AE Eyoh - Applied Computing and …, 2022 - Elsevier
This study evaluates the steepest descent algorithm as a tool for root mean square (RMS)
error optimization in geodetic reference systems to improve the integrity of transformation …