Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province

The monthly time series of the Total Suspended Solids (TSS) concentrations in Euphrates River at Nasria was analyzed as a time series. The data used for the analysis was the monthly series during (1977-2000). The series was tested for nonhomogenity and found to be nonhomogeneous. A significant p...

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Autores principales:	Rafa Al-Suhaili, Tariq J. Al-Mosewi
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2018
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/eebb9a4da8724fe4b0e11d8eda1ff141
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spelling	oai:doaj.org-article:eebb9a4da8724fe4b0e11d8eda1ff1412021-12-02T07:16:40ZTime Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province1818-11712312-0789https://doaj.org/article/eebb9a4da8724fe4b0e11d8eda1ff1412018-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/537https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 The monthly time series of the Total Suspended Solids (TSS) concentrations in Euphrates River at Nasria was analyzed as a time series. The data used for the analysis was the monthly series during (1977-2000). The series was tested for nonhomogenity and found to be nonhomogeneous. A significant positive jump was observed after 1988. This nonhomogenity was removed using a method suggested by Yevichevich (7). The homogeneous series was then normalized using Box and Cox (2) transformation. The periodic component of the series was fitted using harmonic analyses, and removed from the series to obtain the dependent stochastic component. This component was then modeled using first order autoregressive model (Markovian chain). The above analysis was conducted using the data for the period (1977-1997), the remaining 3-years (1998-2000) of the observed data was left for the verification of the model. The observed model was used to generate future series. Those series were compared with the observed series using t-test. The comparison indicates the capability of the model to produce acceptable future data. Rafa Al-SuhailiTariq J. Al-MosewiAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 4, Iss 2 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Rafa Al-Suhaili Tariq J. Al-Mosewi Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province
description	The monthly time series of the Total Suspended Solids (TSS) concentrations in Euphrates River at Nasria was analyzed as a time series. The data used for the analysis was the monthly series during (1977-2000). The series was tested for nonhomogenity and found to be nonhomogeneous. A significant positive jump was observed after 1988. This nonhomogenity was removed using a method suggested by Yevichevich (7). The homogeneous series was then normalized using Box and Cox (2) transformation. The periodic component of the series was fitted using harmonic analyses, and removed from the series to obtain the dependent stochastic component. This component was then modeled using first order autoregressive model (Markovian chain). The above analysis was conducted using the data for the period (1977-1997), the remaining 3-years (1998-2000) of the observed data was left for the verification of the model. The observed model was used to generate future series. Those series were compared with the observed series using t-test. The comparison indicates the capability of the model to produce acceptable future data.
format	article
author	Rafa Al-Suhaili Tariq J. Al-Mosewi
author_facet	Rafa Al-Suhaili Tariq J. Al-Mosewi
author_sort	Rafa Al-Suhaili
title	Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province
title_short	Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province
title_full	Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province
title_fullStr	Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province
title_full_unstemmed	Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province
title_sort	time series analysis of total suspended solids concentrations in euphrates river in al-nasria province
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2018
url	https://doaj.org/article/eebb9a4da8724fe4b0e11d8eda1ff141
work_keys_str_mv	AT rafaalsuhaili timeseriesanalysisoftotalsuspendedsolidsconcentrationsineuphratesriverinalnasriaprovince AT tariqjalmosewi timeseriesanalysisoftotalsuspendedsolidsconcentrationsineuphratesriverinalnasriaprovince
_version_	1718399553027178496

Time Series Analysis of Total Suspended Solids Concentrations in Euphrates River in Al-Nasria Province

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