DETERMINING OF TREND VARIATION IN QUALITY PARAMETERS OF SHABESTAR PLAIN UNDERGROUND WATER

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PANAHI MEHDI; MISAGHI FARHAD; GHANBARI FARID

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Journal: Environmental Sciences Year:2017 | Volume:15 | Issue:3 Page(s): 19-38

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Title

DETERMINING OF TREND VARIATION IN QUALITY PARAMETERS OF SHABESTAR PLAIN UNDERGROUND WATER

Author(s)

PANAHI MEHDI | MISAGHI FARHAD | GHANBARI FARID | Issue Writer Certificate

Keywords

ANALYSIS OF TRENDSQ1

MANN KENDALL TESTQ1

GROUNDWATER QUALITYQ1

SHABESTAR PLAINQ1

Abstract

Introduction: Groundwater has long been the most relied upon water source for human beings and used in the agricultural and drinking sectors. In order to be aware of the condition of water and its optimized management, it is necessary to examine carefully groundwater level fluctuations and GROUNDWATER QUALITY that are influenced by different factors. While carefully monitoring the fluctuations and quality of groundwater, we can realize reliable planning in water supply and source management. Therefore, this study aims to determine the trend of changes in the quality parameters of the groundwater of SHABESTAR PLAIN in order to understand the quality of the groundwater and to specify its application.Material and methods: In this study, in order to understand the quality of SHABESTAR PLAIN’s groundwater and to specify its application, the chemical results of 15 qualitative variables of groundwater samples belonging to 13 stations located in the study area during the years 1993-1999 were compared while non-parametric Mann-Kendall test. The effect of the first-order autocorrelation was then eliminated from the data series. Slope of the trend line was calculated by the age method. The qualitative parameters in this study are total anions, total cations, EC, SAR, CL--, Hco3-, Ca2+, TH, Ph, TDS, SO42-, Na%, Na+, Mg2+and K+which are measured two times every year.Results and discussion: The results show that the time series related to qualitative variables has an ascending trend in most of the stations (except Ali-shah station, Sefid-kamar station and the low water months of SHABESTAR PLAIN). They show a positively significant trend at a 5% level with 36 series (18%) in months of a high water level and with 17 series (9%) in months of low levels of water. Furthermore, the Ali-shah and Sefid-kamar stations have the highest rank for the highest negative trend in two months with high and low levels of water. The comparison of stations suggests that the quality of SHABESTAR PLAIN’s groundwater is in acritical condition in the southern part of the plain. Generally, we can conclude that the quality of groundwater in the study area has decreased over time. The results achieved from investigating the values of time series correlation coefficients of qualitative variables with a normal annual precipitation in the period (1993-1999) show that none of the qualitative variables has a special significance at the 5% level with the amount of annual precipitation. The overall result of this section suggests the lack of relationship between annual precipitation and qualitative variables, while the groundwater level has almost steadily dropped in terms of quality variables during common statistical years (1994-2002). Also, climatic variables such as rainfall, temperature and evaporation were not identified as factors in changing the qualitative characteristics of groundwater in SHABESTAR PLAIN and we have come to the conclusion that adverse changes in these were influenced by human factors.Conclusions: According to results achieved we can say that, if the current condition continues, it is not possible to use groundwater sources in SHABESTAR PLAIN steadily. Water quality will be negatively affected by the lack of treatment of urban and industrial wastewater, the release of agricultural wastes into the plain, its adjacency to Urumia Lake, and the development of a salt marsh.

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APA: Copy

PANAHI, MEHDI, MISAGHI, FARHAD, & GHANBARI, FARID. (2017). DETERMINING OF TREND VARIATION IN QUALITY PARAMETERS OF SHABESTAR PLAIN UNDERGROUND WATER. ENVIRONMENTAL SCIENCES, 15(3 ), 19-38. SID. https://sid.ir/paper/117386/en

Vancouver: Copy

PANAHI MEHDI, MISAGHI FARHAD, GHANBARI FARID. DETERMINING OF TREND VARIATION IN QUALITY PARAMETERS OF SHABESTAR PLAIN UNDERGROUND WATER. ENVIRONMENTAL SCIENCES[Internet]. 2017;15(3 ):19-38. Available from: https://sid.ir/paper/117386/en

IEEE: Copy

MEHDI PANAHI, FARHAD MISAGHI, and FARID GHANBARI, “DETERMINING OF TREND VARIATION IN QUALITY PARAMETERS OF SHABESTAR PLAIN UNDERGROUND WATER,” ENVIRONMENTAL SCIENCES, vol. 15, no. 3 , pp. 19–38, 2017, [Online]. Available: https://sid.ir/paper/117386/en

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