Homogeneity Analysis of Precipitation Series in North Iraq

O. Agha, S. Bagcaci, N. Şarlak
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引用次数: 33

Abstract

Reliability and quality of historical precipitation data are subjected to keen evaluation before a study in water resources, hydrological processes, and climate change fields. In this context, homogeneity tests emerge as a useful tool to control the data reliability and quality. In this study, the homogeneity of the annual and seasonal precipitation data throughout the north of Iraq was investigated using the Pettit, Standard Normal Homogeneity (SNH), Buishand (BR), and Von Neumann (VNR) tests at a significance level of 0.05. Long-term precipitation records taken from nine meteorological stations, were analyzed by each of the four homogeneity tests. Based on annual data, the results of the SNHT test indicated the four stations as inhomogeneous. Moreover, Pettit test exhibited inhomogeneous results for Mosul and Derbandghan stations. The spring precipitation data for all stations were classified as useful except for the Dokan station which was classified as doubtful for the spring precipitation data. As a result, it was concluded that 2, 3, and 1 out of 9 stations were assessed as doubtful for annual, winter, and spring precipitation data, respectively.
伊拉克北部降水序列的均匀性分析
在水资源、水文过程和气候变化领域进行研究之前,历史降水数据的可靠性和质量都受到严格的评估。在这种背景下,同质性测试成为控制数据可靠性和质量的有用工具。本研究采用Pettit、标准正态齐性(SNH)、Buishand (BR)和Von Neumann (VNR)检验,在0.05的显著性水平上研究了伊拉克北部全年和季节性降水数据的均匀性。对9个气象站的长期降水记录进行了四次均匀性检验。基于年数据的SNHT检验结果表明,4个台站具有不均匀性。此外,在摩苏尔和德班德汗站,Pettit测试显示出不均匀的结果。除道坎站春季降水资料为可疑外,其余台站春季降水资料均为有用。结果表明,9个站点中有2个、3个和1个站点的年、冬季和春季降水资料被评估为可疑。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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