Determination of Climate Changes on Streamflow Process in the West of Lake Urmia with Used to Trend and Stationarity Analysis
Journal Title: International journal of Advanced Biological and Biomedical Research - Year 2013, Vol 1, Issue 10
Abstract
One of the most important hydrological time series task is to determine if there is any trend in the data and how to achieve stationarity when there is nonstationarity behavior in data. Detecting trend and stationarity in hydrological time series may help us to understand the possible links between hydrological processes and global climate changes. In this study yearly, monthly and daily streamflow data records of Baranduz Chai, Shahar Chai and Nazlu Chai rivers and Urmia synoptic stattion in the west of Lake Urmia, located in the West Azarbaijan of Iran, used to trend and stationarity analysis. Trend analysis with Mann-Kendall and seasonal Kendall tests showed that most annual and monthly flow series had significant negative trend at 1% and 10% . Five common methods named ADF, DFGLS, ERS, KPSS and PP have been used to examine nonstationarity of river flows. Results demonstrated that most annual, monthly and daily series appear to be stationary after removing trend component from series. Also results illustrated, that mean air temperature of this region increased significantly at 1% level. Increasing air temperature causes changing most of precipitations to rain in the replace of snow that maybe the main reason of river flow decreasing and Lake Urmia depletion in recent years. Furthermore, studied rivers have high dependence on snow melt water, therefore are affected by temperature changes. This showed obviously effect of global warming on the decreasing river flow discharges in the west of Lake Urmia.
Authors and Affiliations
Keivan KHalili| Water Engineering Department, Faculty of Agriculture, Urmia University, Urmia- IRAN, Farshad Ahmadi| Msc Student of Water Engineering Department, Faculty of Agriculture, Tabriz University, Tabriz- IRAN, E-mail: Farshad.paper@yahoo.com, Yagub Dinpashoh| Associate Professorof Water Engineering Department, Faculty of Agriculture, Tabriz University, Tabriz- IRAN, Ahmad Fakheri Fard| Professorof Water Engineering Department, Faculty of Agriculture, Tabriz University, Tabriz- IRAN
Keywords
Related Articles
- EP ID EP12908
- DOI -
- Views 336
- Downloads 14
Effects of the Pursuit herbicide on relationships of morphological and physiological traits of two species of Trifolium pretense L. and Trifolium alexandrinum L.
To study the physiological and morphological relationships of two clover species affected by herbicides, Pursuit experiment in a factorial based on randomized completely design with 3 replications at the Damavand in 20...
CONTRACEPTIVE EFFICACY OF HYDRO-METHANOLIC FRUIT EXTRACT OF XYLOPIA AETHIOPICA IN MALE ALBINO RATS
The rising human population, particularly in the developing countries, and the attendant socioeconomic effects necessitates the need for its effective regulation. This study aims at exploring the contraceptive efficacy...
Growth Response of Petunia hybrid to Zinc Sulphate and Salicylic Acid
A pot experiment was conducted in a completely randomized design with five treatment and five replication, in each replication were 6 plants used. The study of zinc sulphate (ZnSO4) application (20 and 40 ppm) and Sali...
Effect of Different Concentrations of IBA (Indulebutyric Acid) Hormone and Cutting Season on the Rooting of the Cuttings of Olive (Olea Europaea Var Manzanilla)
Objective: In order to study the effect of different concentrations of IBA hormone on rooting of olive cuttings in spring and winter of 2012-2013 in a greenhouse in Jiroft, Iran. Methods: a split-plot experiment was co...
Pomegranate (Punica granatum L.) seed: A comparative study on biochemical composition and oil physicochemical characteristics
The pomegranate seeds of four Iranian commercial varieties (Abanmahi (AB), Malas (MS), Pust Sefid (PS) and Shahvar (SH)) were evaluated in terms of some quality properties including protein, oil, dietary fiber, mineral...