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Showing 4 results for Groundwater Quality

, , ,
Volume 9, Issue 2 (9-2017)
Abstract

Increase of population, limited resources and the excessive exploitation of aquifers and surface water caused irreparable damage to the country's natural resources including groundwater resources. Contamination of groundwater has been published in numerous environmental hazards that directly affect their life. The aim of this study was to evaluate the quality of groundwater for drinking and irrigation purposes in the Saghez city, Iran. For this purpose, 188samples has been gathered from 2004 to 2012 water data and the parameters of salinity, chlorine, concentration of dissolved substances, sulfate, Nitrate, water hardness, sodium adsorption ratio were studied. Analysis of variance (ANOVA) and the LSD test was used to compare treatments and the differences between various stations respectively. For determining the most appropriate location and zoning methods for the above parameters, geographical information system (GIS) was used. Therefore, a geostatistic method of Circular Kriging, Gaussian and deterministic techniques such as inverse distance weighting, local estimator and general estimates was applied. The results showed that the quality of water in the Saghez city is appropriate and acceptable for drinking and irrigation. Spatial interpolation results according to the root mean squared error (RMSE), Mean Bias Error (MBE) and mean absolute error (MAE), among the different methods of interpolation techniques the IDW with 1 power for estimating the parameters of sulfate, sodium, chlorine and sodium absorption ratio, and the IDW with 2 power for estimating parameters of salinity, soluble solids concentration and total Hardness and the Circular Kriging method were the most appropriate methods for Nitrate.


, , , ,
Volume 9, Issue 3 (10-2017)
Abstract

Today inappropriate land use/cover changes due to the growing population of the world are one of the issues that have several consequences. The relative impacts of different types of land use/cover on the groundwater quality are not known yet which should be considered with more details. This study was mainly aimed to investigate the influence of land use /cover changes on the groundwater quality and quantity. The study area covers an area of 317 km² in Mehran plain southwest of Ilam province. Landsat satellite images of 2002 and 2015 were used for mapping the land use/cover layers. Different water parameters of EC, TDS and TH were analyzed to conduct the changes in groundwater quality during 2000-2015. The results of this study showed that the land uses/cover were changes, especially increasing residential land and irrigated agriculture in the northwest and the west of the region. Reducing groundwater quality and quantity could be because of overutilization of groundwater and also using fertilizer for agriculture. This condition will be required a comprehensive management program in the study area.


Farzaneh Parsaie, Mohammad Ali Mahmoodi, Aslan Egdernezhad,
Volume 12, Issue 1 (2-2021)
Abstract

Water quality monitoring has economic value in the process of producing clean water and is an important factor in reducing production and water treatment costs. In this study, the spatial variation of groundwater quality for drinking (based on Schuler method) and agriculture (based on the Willcox method) was investigated in Qorveh plain in Kurdistan province based on annual data (2009 to 2014). At first, a map of effective parameters in each method of water quality classification was prepared using the ordinary Kriging method based on data from 59 wells in the year 2018. Then, overlapping the maps, the final map of groundwater quality in the region was obtained for drinking and farming. The qualitative changes in the studied period were evaluated using nonparametric Spearman test and Sen estimator test. The results of the groundwater quality in terms of drinking and farming showed that the areas of more suitable classes are decreasing and the area of inappropriate classes is increasing. Spearman's results showed that 36% and 64% of data showed positive and negative trends at 95% level in wet and dry months, respectively that Groundwater quality has improved in recent months.
Yaser Sabzevari, Hossein Zeinivand,
Volume 12, Issue 3 (6-2020)
Abstract

Groundwater resources are the largest available freshwater reservoir on the Earth. Therefore, the management of these resources and their quality control is an essential issue. The purpose of this study is to investigate the trend of changes in groundwater quality parameters by Mann-Kendall test and qualitative classification of Boroujerd-Dorod plain using GQI index. For this purpose, the values of different parameters including chlorine, sulfate, acidity, total hardness and total dissolve solid from 41 sources during the period of 1993-2016 were used. The results showed that based on Mann-Kendall test, the acidity and chlorine parameters had positive Z value, and the acidity trend was significant at 95% level, while other parameters had negative Z value with decreasing trend. According to the GQI index, all parameters in the year 2016 were in accordance with ISIRI criteria. Based on the ranking of different parameters, it was found that TH, pH and EC had the greatest impact on the quality of groundwater resources in the studied plain. From the spatial point of view, the highest concentration of qualitative parameters except pH is in the center of the plain, and the northeast area of the plain is also prone to high pollution compared to other parts of the plain, especially in terms of cations and EC. Based on Schuler's classification which was used to validate the GQI results, the quality is located in good and acceptable class, which confirms the result of this index.

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مجله علمی پژوهشی اکوبیولوژی تالاب Journal of Wetland Ecobiology
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