Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Ikechukwu Kalu"'
Autor:
Ikechukwu Kalu, Christopher E. Ndehedehe, Vagner G. Ferreira, Sreekanth Janardhanan, Matthew Currell, Mark J. Kennard
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-19 (2024)
Abstract The coarse spatial resolution of the Gravity Recovery and Climate Experiment (GRACE) dataset has limited its application in local water resource management and accounting. Despite efforts to improve GRACE spatial resolution, achieving high r
Externí odkaz:
https://doaj.org/article/9945c96cf28948e394d4baa5c773f2cb
Autor:
Christopher E. Ndehedehe, Vagner G. Ferreira, Oluwafemi E. Adeyeri, Fabio M. Correa, Muhammad Usman, Francis E. Oussou, Ikechukwu Kalu, Onuwa Okwuashi, Alex O. Onojeghuo, Augusto Getirana, Ashraf Dewan
Publikováno v:
Resources, Environment and Sustainability, Vol 12, Iss , Pp 100105- (2023)
Contemporary understanding of the impacts of climate change on global drought characteristics (e.g., intensities, extents) is still limited and not well understood. This knowledge is critical because projected changes in climate are expected to impac
Externí odkaz:
https://doaj.org/article/25c1cd004a7c4db0988e212f8fa68f05
Autor:
Ikechukwu Kalu, Christopher E. Ndehedehe, Onuwa Okwuashi, Aniekan E. Eyoh, Vagner G. Ferreira
Publikováno v:
Journal of Hydrology: Regional Studies, Vol 46, Iss , Pp 101346- (2023)
Study Region: The Zambezi River Basin in southern Africa Study focus: Modelling global freshwater systems is difficult because of the complexities of climate and anthropogenic influence on hydrological systems, especially at local scales. The rapid c
Externí odkaz:
https://doaj.org/article/ad876f1d6f704670856d973836bcbd7c
Autor:
Ikechukwu Kalu, Christopher E. Ndehedehe, Onuwa Okwuashi, Aniekan E. Eyoh, Vagner G. Ferreira
Publikováno v:
Journal of Hydrology: Regional Studies, Vol 46, Iss , Pp 101326- (2023)
Study region: The Congo River basin in west-central Africa Study focus: Traditional machine learning algorithms are recently being replaced by integrated learning techniques in pattern recognitions and predictions. These updated tools (or techniques)
Externí odkaz:
https://doaj.org/article/43b182ceaba14e4aba314c5b96196324
Autor:
Ikechukwu Kalu, Christopher E. Ndehedehe, Onuwa Okwuashi, Aniekan E. Eyoh, Vagner G. Ferreira
Publikováno v:
Journal of Hydrology: Regional Studies, Vol 43, Iss , Pp 101185- (2022)
Study region: The Southern African region consists of ten countries including, Angola, Zambia, Malawi, Namibia, Botswana, Zimbabwe, Mozambique, South Africa, Lesotho, and Swaziland. Frequent drought episodes in the arid and semi-arid parts of the reg
Externí odkaz:
https://doaj.org/article/955277f697794aa88cc7dfc6058f83f9
Publikováno v:
Applied Computing and Geosciences, Vol 14, Iss , Pp 100086- (2022)
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. With an initial RMS error estimate of 0.01830m, the negative gradien
Externí odkaz:
https://doaj.org/article/0d8f33a67d824166a667f9ab9f30a42e
Publikováno v:
Remote Sensing, Vol 13, Iss 13, p 2543 (2021)
In large freshwater river basins across the globe, the composite influences of large-scale climatic processes and human activities (e.g., deforestation) on hydrological processes have been studied. However, the knowledge of these processes in this er
Externí odkaz:
https://doaj.org/article/e5a1967d19b4456da2bc2384bc75cf71
Autor:
Ikechukwu Kalu, Christopher E. Ndehedehe, Onuwa Okwuashi, Aniekan E. Eyoh, Vagner G. Ferreira
Publikováno v:
Earth Science Informatics. 15:2585-2599
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::968cef24ee127580db0a1930e30a71ee
https://doi.org/10.1007/s12145-022-00869-6
https://doi.org/10.1007/s12145-022-00869-6
Publikováno v:
Earth Science Informatics. 15:233-251
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 determination of a high-precision, high-resolution gravimetric geoid mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d54e3ad00846502c570dbf12320ad4e8
https://doi.org/10.1007/s12145-021-00716-0
https://doi.org/10.1007/s12145-021-00716-0
Publikováno v:
Modeling Earth Systems and Environment. 8:611-624
Efficient transformation parameters are key to effective geodetic operations between any systems. With the advancement in technology, an improved interaction between geodetic reference frames has been noticed irrespective of their inherent heterogene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e9423c1c9ef1942a900a94e11de87f7
https://doi.org/10.1007/s40808-021-01090-y
https://doi.org/10.1007/s40808-021-01090-y