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125704

Homogeneity Analysis of Rainfall Series in the Upper Blue Nile River Basin, Ethiopia

Article

Last updated: 23 Jan 2023

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Subjects

-

Tags

Irrigation and Hydraulics

Abstract

Reliability and quality Assessment of historical rainfall records are required in the hydrological modelling, water resource processes and for climatic studies. The homogeneity of the annual rainfall data sets throughout the Upper Blue Nile River Basin (UBNRB) was examined using four absolute homogeneity tests namely; Standard Normal Homogeneity Test (SNHT), Buishand Range (BR), Pettitt test and Von Neumann ratio tests (VNR). The rainfall records from 30 meteorological stations during the period between 1901 and 2013 were considered. Results of SNH and BR tests showed that the annual series of the considered stations are homogeneous and classified as “useful“at 95% significance level. However, the Von Neumann ratio test detected inhomogeneity at six stations. Moreover, only 16 out of 30 stations were classified as homogenous based on the Pettitt test which confirmed that Pettitt test is more sensitive to detect the non-homogeneity for the time series. On the basis of results of the performed tests, SNHT and BRT were able to detect breaks at the series' end. Overall, the data set is representing a reliable climatic series to be considered in the subsequent trend analysis.

DOI

10.21608/erjeng.2019.125704

Keywords

Standard Normal Homogeneity test, Buishand Range test, Pettitt test, Von Neumann Ratio test, Upper Blue Nile

Authors

First Name

Radwa

Last Name

Elzeiny

MiddleName

-

Affiliation

Ministry of Water Resources and Irrigation, Cairo, Egypt,

Email

rrzeiny@gmail.com

City

-

Orcid

-

First Name

Mossad

Last Name

Khadr

MiddleName

-

Affiliation

College of Engineering, University of Bisha, Bisha, Saudi Arabia, Department of Irrigation and Hydraulics Engineering, Faculty of Engineering, Tanta University, Tanta, Egypt,

Email

mosaad.khadr@f-eng.tanta.edu.eg

City

-

Orcid

-

First Name

Shreen

Last Name

Zahran

MiddleName

-

Affiliation

Researcher at Environment and Climate Change Research Institute (ECRI) , National Water Research Centre(NWRC) and assistant professor at Canadian international college CIC, Cairo, Egypt

Email

shereinzahran@gmail.com

City

-

Orcid

-

First Name

Ebrahim

Last Name

Rashwan

MiddleName

-

Affiliation

Professor of Irrigation & Hydraulics Engineering

Email

ibrahim.rashwan@f-eng.tanta.edu.eg

City

TANTA

Orcid

-

Volume

3

Article Issue

September

Related Issue

18764

Issue Date

2019-09-01

Receive Date

2019-06-26

Publish Date

2019-09-01

Page Start

46

Page End

53

Print ISSN

2356-9441

Online ISSN

2735-4873

Article File

ERJENG_Volume 3_Issue September_Pages 46-53.pdf

PDF . 950.9kB

Link

https://erjeng.journals.ekb.eg/article_125704.html

Detail API

https://erjeng.journals.ekb.eg/service?article_code=125704

Order

7

Type

Research articles

Type Code

1,605

Publication Type

Journal

Publication Title

Journal of Engineering Research

Publication Link

https://erjeng.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

23 Jan 2023