Analysis of Trend in Meteorological and Hydrological Time-series using Mann-Kendall and Sen’s Slope Estimator Statistical Test in Akwa Ibom State, Nigeria
Haruna Garba, Udeme Udeme Udokpoh
International Journal of Environment and Climate Change · pp. 1017–1035 · Published 24 Aug 2023
10.9734/ijecc/2023/v13i102748Abstract
The monthly, seasonal, annual, and decadal trends of seven hydro-meteorological variables were analysed for stations in Akwa Ibom State, Nigeria, controlled by the Nigerian Meteorological Agency (NiMet) and the Cross River Basin Development Authority (CRBDA) from 1972 to 2021. At the 5% statistical significance level, the non-parametric Mann-Kendall and Sen's slope estimator techniques were used to detect if there was a positive or negative trend and the magnitude of the trend in hydro-meteorological data. In the present study, there was a significant statistically increasing (positive) trend in mean seasonal and annual rainfall, maximum temperature, minimum temperature, and runoff. However, there was a significant statistically decreasing (negative) trend in average annual relative humidity, solar radiation, and potential evapotranspiration. The magnitudes of the trends were 19.39mm/year, 0.0314oC/year, 0.013oC/year, -0.104%/year, -8.78MJ/m2/year, -1.440mm/year, and 0.028m3/s/year for annual rainfall, maximum temperature, minimum temperature, relative humidity, solar radiation, PET, and runoff, respectively. The rising trends in precipitation, temperature, and runoff in this research area show that this region is subject to climatic variability. The results of the Mann-Kendall and Sen's slope estimator statistical tests revealed the consistency of performance in the detection of the trend for the hydro-meteorological variables.
Cited by 45
Won-joon Wang, Hung Soo Kim · 2025
Javed Mallick, Saeed Alqadhi, Swapan Talukdar · Environmental Technology & Innovation · 2025
Debarati Bera, Dipanwita Dutta, Sayanti Poddar · Journal of Environmental Management · 2025
Endalamaw Wasihun · International Journal of Energy and Environmental Science · 2025
Mohammed Abdu Nasara, Himan Shahabi, Shamsuddin Shahid · Physics and Chemistry of the Earth, Parts A/B/C · 2025
Qinye Ma, Jue Wang, Nuo Lei · Water · 2025
Wenjun Sun, Zhiqiang Lin, Chao-Jun Chen · 2025
Yunus Ziya Kaya · Symmetry · 2025
Hasan Sayın, Nurcan Avşin · Yüzüncü Yıl Üniversitesi Sosyal Bilimler Enstitüsü Dergisi · 2026
Thejanguno Peseyie, Dhrubajyoti Sahariah, Jatan Debnath · Discover Geoscience · 2026
Showing 20 of 45 known citations — external sources report more than can currently be individually listed.
Related research
- Modeling Climate Change Projections for Ferozpur Sub-catchment of Jhelum Sub-basin of Kashmir Valley — shares topic coverage
- Climate Change Impacts on Livelihood Vulnerability Assessment-Adaptation and Mitigation Options in Marine Hot Spots in Kerala, India — shares topic coverage
- Measuring Climate Change Vulnerability and its Adaptive Capacity: Policies and Planning for Bangladesh — shares topic coverage
- Life Cycle Analysis of Green Roof Implemented in a Global South Low-income Country — shares topic coverage
- An Analysis of Climate Forcings from the Central England Temperature (CET) Record — shares topic coverage
Article metrics
Real usage data collected on this platform.
48
Page views
0
PDF downloads
6
Outbound clicks
45
Citations
Views over time
Views by country
Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".
Traffic sources
Referring site, by host.
Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.