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Details van artikel 57 van 62 gevonden artikelen
| Titel: |
Time Series Modeling and Trend Detection of Streamflow and Selected Water Quality Variables in a River: Case Study, Euphrates River Monitoring Stations of 2102 and 2119 |
| Auteur: |
Ahmet Kurunc Engin Yurtseven |
| Verschenen in: |
Journal of applied sciences |
| Paginering: | Jaargang 5 (2005) nr. 6 pagina's 1016-1021 |
| Jaar: |
2005 |
| Inhoud: |
This study analyzed the data for streamflow and selected water quality variables including Electrical Conductivity (EC), Sodium Adsorption Ratio (SAR), sodium (Na+), chloride (Cl-) and sulfate (SO42-), collected from two stations (2102 and 2119) in the Eupharates River in Turkey from 1984 to 1999 for existence of trends (using Kendall`s tau test) and forecasting using a stochastic model (Thomas-Fiering). Because of EC values, the water can be used for irrigation purposes if a moderate amount of leaching occurs. In terms of SAR values, the water can be used for irrigation with little danger of the development of harmful levels of exchangeable sodium. Considering mean Cl- concentrations, no specific ion effect of Cl- is expected due to use of these waters for agricultural purposes. The quality of water at Durucasu station is also fit for irrigation in terms of SO42-:Cl- ratio. Kendall`s tau test results suggested an increased trend in the data record of EC and Cl- at 5% significance level and SAR and Na+ at 10% significance level for the monitoring station of 2102 whereas an increased trend for the time series of SAR, Na+ and Cl- at 5% and of EC at 10% significance level for the monitoring station of 2119. There was no increased or decreased trend in time series of SO42- and streamflow for both stations. The forecast values for all water quality variables and streamflow using Thomas-Fiering model are very close to the observed data and they suggest that there is no strange value for water quality variables and streamflow and the same flow pattern will continue into the near future. |
| Uitgever: |
Asian Network for Scientific Information (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 57 van 62 gevonden artikelen
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