scholarly journals Drought assessment and rainfall trend analysis in a southern Mediterranean watershed during the last century (1914-2011)

2015 ◽  
Author(s):  
Ababou
Keyword(s):  
Trend Analysis ◽  
Rainfall Trend ◽  
Drought Assessment ◽  
Southern Mediterranean

scholarly journals Rainfall Trend Analysis by ANN Method

2020 ◽  
Vol 9 (6) ◽  
pp. 1437-1447
Author(s):  
Bhupendra Dhankar ◽  
Gunja Dhruw
Keyword(s):  
Trend Analysis ◽  
Rainfall Trend

scholarly journals Rainfall Trend Analysis over Bihar: A Parametric Method

2021 ◽  
Vol 10 (2) ◽  
pp. 2851-2856
Author(s):  
Sushanta Sarkar Birendra Kumar ◽  
Sanjay Kumar
Keyword(s):  
Trend Analysis ◽  
Parametric Method ◽  
Rainfall Trend

scholarly journals Rainfall trend analysis of Sydney’s drinking water catchments

2009 ◽  
Author(s):  
S. Shrestha ◽  
S. Riley ◽  
L. Thomas
Keyword(s):  
Drinking Water ◽  
Trend Analysis ◽  
Rainfall Trend ◽  
Water Catchments

scholarly journals Comparison of Statistical Methods to Graphical Methods in Rainfall Trend Analysis: Case Studies from Tropical Catchments

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Upaka Rathnayake
Keyword(s):  
Time Series ◽  
Trend Analysis ◽  
Climatic Factors ◽  
Data Series ◽  
Graphical Methods ◽  
Rainfall Trend ◽  
Comparison Analysis ◽  
Analysis Techniques ◽  
Rainfall Trends ◽  
Time Series Analyses

Time series analyses for climatic factors are important in climate predictions. Rainfall is being one of the most important climatic factors in today’s concern for future predictions; thus, many researchers analyze the data series for identifying potential rainfall trends. The literature shows several methods in identifying rainfall trends. However, statistical trend analysis using Mann–Kendall equation and graphical trend analysis are the two widely used and simplest tests in trend analysis. Nevertheless, there are few studies in comparing various methods in the trend analysis to suggest the simplest methods in analyzing rainfall trends. Therefore, this paper presents a comparison analysis of statistical and graphical trend analysis techniques for two tropical catchments in Sri Lanka. Results reveal that, in general, both trend analysis techniques produce comparable results in identifying rainfall trends for different time steps including annual, seasonal, and monthly rainfalls.

scholarly journals Advanced Rainfall Trend Analysis of 117 Years over West Coast Plain and Hill Agro-Climatic Region of India

Atmosphere ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1225
Author(s):  
Atul Saini ◽  
Netrananda Sahu ◽  
Pankaj Kumar ◽  
Sridhara Nayak ◽  
Weili Duan ◽  
...  
Keyword(s):  
Trend Analysis ◽  
West Coast ◽  
Winter Season ◽  
Recurrence Interval ◽  
Annual Rainfall ◽  
Rainfall Trend ◽  
Climatic Region ◽  
Monotonic Trend ◽  
Slope Test ◽  
The Impact

In this paper, the rainfall trend of the West Coast Plain and Hill Agro-Climatic Region is analyzed for 117 years (1901–2017). This region is a globally recognized biodiversity hotspot and known for one of the highest rainfall receiving regions in India. Rainfall grid dataset is used for the analysis of rainfall trends on monthly, seasonal, and decadal time scales. Modified Mann–Kendall’s test, Linear Regression, Innovative Trend Analysis, Sen’s Slope test, Weibull’s Recurrence Interval, Pearson’s Coefficient of Skewness, Consecutive Disparity Index, Kurtosis, and some other important statistical techniques are employed for trend analysis. Results indicate that the rainfall trend is significant in January, July, August, September as well as the Winter season. Among all the significant trends, January and July showed a decreasing rainfall trend. July has the highest contribution (30%) among all the obtained monotonic trend to annual rainfall and coincidentally has the highest trend magnitude. August and September months with a combined contribution of 30% to annual rainfall, show an increasing monotonic trend with high magnitude whereas Winter season shows a monotonic decreasing rainfall trend with comparatively low magnitudes. Decadal analysis along with the study of recurrence interval of excess and deficit years helps to understand the decadal rhythm of trend and the magnitude of extreme monthly and seasonal events. Skewness reveals that rainfall dataset of all the periodic results is right-skewed and the recurrence interval also supports the skewness results. Sharply decreasing rainfall in July and rising rainfall in August and September is predictive of the impact on agriculture, biodiversity and indicates the rainfall regime shift in the region.

Temperature and rainfall trend analysis at monthly scale in Dehradun District, Uttarakhand using variance corrected mann- kendall test

2020 ◽  
Vol 8 (2) ◽  
pp. 201
Author(s):  
Sadikul Islam ◽  
P.R. Ojasvi ◽  
Pankaj Srivastava ◽  
Anand Kumar Gupta ◽  
R.S. Yadav
Keyword(s):  
Trend Analysis ◽  
Kendall Test ◽  
Rainfall Trend ◽  
Monthly Scale ◽  
Mann Kendall Test

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.

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