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The study outlines a frequency distribution study on the highest annual flood statistics in Niger River located at Shintaku hydrologic Station for a period of 58years. In order to determine optimal model for highest annual flood analysis generalised extreme value, Log normal, Gumbel maximum, Generalised Pareto and Log Pearson III, were tested. Base...
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... descriptive statistics for the annual maximum discharge of Shintaku gauging station of River Niger are presented in Table 1 Figure 2. ...Similar publications
The structure of the Prakasam barrage stretches 1223.5 m across the Krishna River connecting Krishna and Guntur districts with geographical co-ordinates 16°3012311 N latitude 80°3611711 E longitude. The reservoir has been attacked by the number of floods during the past and present This paper presents a frequency distribution study on maximum yearl...
Baitarani River is one of the important rivers of India falling in the state of Odisha and Jharkhand. It has been affected by the problem of floods and inundation annually. At site Flood Frequency Analysis using three probability distribution models—Log Pearson III, Generalized Extreme Value Distribution and Gumbel Distribution- have been analyzed...
The frequency analysis of the maximum instantaneous flood is mostly based on the stationary assumption. The purpose of the present study is to compare the results of maximum instantaneous flood analysis under stationary and non-stationary conditions in Ghareh Sou basin, and also answer the question as to whether there is a difference between estima...
In the regional flood frequency analysis, the selection of important site characteristics and a suitable number of clusters have a significant role in finding homogeneous regions. Generally, it is difficult to determine the exceedance threshold value or the number of average peaks per year (λ) in Partial Duration Series (PDS), and this difficulty i...
This paper is sets-out for the regional frequency analysis of daily maximum rainfall from the 27 rain gauge stations in Haryana using L-moments. As the distribution of rainfall varies spatially in Haryana, the 27 rain gauge stations are grouped into three clusters namely, cluster C1, C2 and C3 using Ward’s clustering method and homogeneity of clust...
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... A flood is defined as an overflow of excess water arising from accumulated surface run-off on flat lands due to inadequate natural or artificial drains (Vargas, 2017;Njoku et al., 2015;Ibrahim et al., 2016;Ehiorobo & Uso, 2014;Sadiq et al., 2019;Ibeje, 2020). Similarly, a flood is a large amount of water generated from a particular source (such as a river, pond, snow melting glaciers, broken dam, or pipe) towards a previously dried and unsubmerged area (Njoku & Okoro, 2015;Ogbodo, 2011). ...
The objective of this study was to characterise Manafwa River floodplain and adjacent soils. Soil samples were collected from 0 - 20 cm depth in fallowed and cultivated Manafwa floodplain soils for laboratory analysis. Treatments included upland (control), floodplains fallowed for a year, floodplains fallowed for over a year, cultivated floodplains within 5 m and 50 m away from the river banks. Each treatment was replicated three times (3 blocks), and samples collected were analysed for K, Na, available P, total N, exchangeable acidity, pH, organic matter, moisture content, sand, silt, and clay. The soil sampling results were subjected to statistical Analysis of Variance (ANOVA) using Randomised Complete Block Design (RCBD), and the difference between treatment means were dictated using F-, student’s t and F-LSD/pairwise comparison tests. There was statistically no significant (p > 0.05) difference among different floodplains and uplands studied. Upland soils posted 71.67% for the highest pH and 0.09%, 0.87%, 9.74 ppm, 2.23 ppm and 7.264% for the lowest available N, organic matter, Phosphorous, Sodium and Moisture Content, respectively. Cultivated floodplain soil posted highest total P at 29.16 ppm and pH at 6.39% while fallowed floodplains lowest pH at 5.34%, highest available N at 0.32%, highest organic matter at 4.02%, highest K at 21.33%, highest Na at 13.93%, highest exchangeable acidity at 2.32 Cmol/Kg, highest clay content at 14.33%, lowest sand composition at 38.00%, highest silt composition at 54.8% and highest Moisture Content of 32.472%. As depicted by soil fertility analysis results, Manafwa River floodplain and adjacent soils have the capacity to accommodate and boost crop production and productivity. Any nutrients lost to leaching could be gained from subsequent fallowing and sustainable soil fertility management, proper drainage, crop rotation, adding organic manure, and cover cropping, among others
