Trend Analysis of Rainfall Characteristics in the Kemena and Tatau River Basins, Sarawak

2019 ◽  
pp. 71-83
Author(s):  
Osamu Kozan
Keyword(s):  
Trend Analysis ◽  
River Basins ◽  
Rainfall Characteristics

Long-term trend analysis for precipitation in Asian Pacific FRIEND river basins

2005 ◽  
Vol 19 (18) ◽  
pp. 3517-3532 ◽  
Author(s):  
Z. X. Xu ◽  
K. Takeuchi ◽  
H. Ishidaira ◽  
J. Y. Li
Keyword(s):  
Trend Analysis ◽  
River Basins ◽  
Term Trend ◽  
Asian Pacific ◽  
Long Term Trend

Effects of rainfall characteristics on corrosion indices in Korean river basins

2014 ◽  
Vol 54 (4-5) ◽  
pp. 1233-1241 ◽  
Author(s):  
Minsoo Maeng ◽  
Inhwan Hyun ◽  
Suingil Choi ◽  
Seok Dockko
Keyword(s):  
River Basins ◽  
Rainfall Characteristics

scholarly journals Rainfall trend analysis

2021 ◽  
Vol 17 (1) ◽  
pp. 121-125
Author(s):  
Virendra N. Barai ◽  
Rohini M. Kalunge
Keyword(s):  
Trend Analysis ◽  
Kendall Test ◽  
River Basins ◽  
Annual Rainfall ◽  
Positive Trend ◽  
Rainfall Trend ◽  
Trend Magnitude ◽  
Increasing Trends ◽  
Multiple Units ◽  
Rainy Days

This article aims to review studies pertaining to trends in rainfall, rainy days over India. Non-parametric tests such as Sen’s Slope were used as estimator of trend magnitude which was supported by Mann-Kendall test. The findings of various studies indicate variance with respect to the rainfall rate, which contributes to an uncertain picture of the rainfall trend. In the study of monsoon of different locations in India some places showed increasing trends however, there is signifying decrease in trend all over India. It was also mentioned that analysis can vary from for a location if done using different source or types of collection of data. Spatial units range from station results and sub-division to sub-basin/river basins for trend analysis. The outcomes of the different experiments vary and a simple and reliable picture of the trend of rainfall has not appeared. While there can be a non-zero slope value for the multiple units (sub-basins or sub-divisions), few values are statistically important. In a basin-wise trend analysis report, some basins had a declining annual rainfall trend; at a 95 per cent confidence stage, only one basin showed a strong decreasing trend. Out of the six basins exhibiting a rising trend saw a major positive trend in one basin. Many of the basins have the same pattern direction on the annual and seasonal scale for rainfall and rainy days.

scholarly journals Trend Analysis and Variability of Air Temperature and Rainfall in Regional River Basins

2021 ◽  
Vol 7 (5) ◽  
pp. 816-826
Author(s):  
Benjamin Nnamdi Ekwueme ◽  
Jonah Chukwuemeka Agunwamba
Keyword(s):  
Water Resources ◽  
Trend Analysis ◽  
Air Temperature ◽  
Temporal Trends ◽  
Kendall Test ◽  
River Basins ◽  
Annual Rainfall ◽  
Eastern Region ◽  
South Eastern ◽  
Mann Kendall Test

Global warming and climate variability are emerging as the foremost environmental problems in the 21st century, especially in developing countries. Full knowledge of key climate change variables is crucial in managing water resources in river basins. This study examines the variability of air temperature and rainfall in the five states of South-Eastern region of Nigeria, using the trend analysis approach. For this purpose, temporal trends in annual rainfall and temperature were detected using non-parametric Mann-Kendall test at 5% significance level. The time series rainfall and temperature data for the period 1922-2008 were analyzed statistically for each state separately. The results of Mann Kendall test showed that there is trend in rainfall in all the capital cities in South-East except Owerri and Awka. It is also observed that the trend of rainfall is decreasing for all the study areas in South-East with the lowest trend rate of -0.1153 mm rainfall occurring in Umuahia. In the case of air temperature, it is observed that the trend is increasing for all the study areas in South-East with the highest trend rate of 0.04698 oC/year occurring in Enugu. These findings provide valuable information for assessing the influence of changes on air temperature and rainfall on water resources and references for water management in the South-Eastern river basin of Nigeria. It also proved that Mann-Kendall technique is an effective tool in analyzing temperature and rainfall trends in a regional watershed. Doi: 10.28991/cej-2021-03091692 Full Text: PDF

scholarly journals Trend analysis of sediment flux time series from tropical river basins in India using non-parametric tests and multiscale decomposition

2016 ◽  
Vol 2 (4) ◽  
pp. 1-16 ◽  
Author(s):  
S. Adarsh ◽  
M. S. VishnuPriya ◽  
Sajan Narayanan ◽  
M. S. Smruthi ◽  
Paul George ◽  
...  
Keyword(s):  
Time Series ◽  
Trend Analysis ◽  
River Basins ◽  
Sediment Flux ◽  
Tropical River ◽  
Multiscale Decomposition ◽  
Non Parametric

Spatiotemporal trend analysis of changing rainfall characteristics in Guinea Savanna of Nigeria

2017 ◽  
Vol 3 (3) ◽  
pp. 1081-1090 ◽  
Author(s):  
Luka Fitto Buba ◽  
Nura Umar Kura ◽  
John Bathrobas Dakagan
Keyword(s):  
Trend Analysis ◽  
Rainfall Characteristics ◽  
Guinea Savanna
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