mehri raoofi; Mahmoud Habibnejad Roshan; Kaka Shahedi; Fatemeh Kardel
Abstract
Rivers are the main arteries of watersheds that play an important role in providing water for agriculture, drinking and industry. On the other hand, the reduction of river water quality has been one of the biggest human concerns in the last century. In order to evaluate the quality of running water, ...
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Rivers are the main arteries of watersheds that play an important role in providing water for agriculture, drinking and industry. On the other hand, the reduction of river water quality has been one of the biggest human concerns in the last century. In order to evaluate the quality of running water, biological indicators and the study of benthic invertebrates can be used. The aim of this study was to investigate the water quality of the main rivers of Babolrood watershed using the Hilsenhof Biological Index (HFBI). For this purpose, sampling of benthic invertebrates in 5 main river stations was performed using a net frame (sorber) with a cover area of 40 cm2 and transferred to the laboratory for identification. Then, using Pennak (1953) and Mellenby (1963) identification keys, the samples were identified by family and sex and counted and weighed. Also, at the same time as sampling of benthic organisms to study the physicochemical properties of water, samples were taken from river water. Pearson correlation coefficient was used to investigate the relationship between biological samples and physicochemical properties of water. The results showed that Babolk station with the lowest FBI and Babolrood-Babol station with the highest FBI were in the category of non-organic pollution and some organic pollution, respectively. The results of correlation of biological samples with physicochemical parameters in most cases were not significant at 95% confidence level. The highest correlation coefficient between Oligochaeta species was with Diversity biodiversity.Keywords: Benthic invertebrates, water quality, HFBI, Babolrood watershed, Mazandaran province
Tayebeh Irani; Mir Hassan Miryaghoubzadeh
Abstract
Land use is referred to the use of land in existing condition that includes all uses in different parts. Land use change is affected by several factors. In this research, land use Changes in the Zarrinehroud watershed and its effect on water quality were investigated in three periods (1987, 2004 and ...
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Land use is referred to the use of land in existing condition that includes all uses in different parts. Land use change is affected by several factors. In this research, land use Changes in the Zarrinehroud watershed and its effect on water quality were investigated in three periods (1987, 2004 and 2013) using Landsat satellite TM and OLI sensors. The results indicate that land use changes in the watershed is going to reduce of pasture and increasing of agriculture. Wilcox and Schuler diagrams were used to evaluate the chemical quality of agricultural water, and drinking water, respectively. Based on the Wilcox diagram, only year 2004 (dry period) was on the C3-S1 class and the remaining years were on the C2-S1 class. Based on the Schuler diagram, the year 2004 (dry period) is considered acceptable in the drinking category and the remaining years are in good drinking category and have no restrictions on drinking. Water quality assessment of the Zarrinehroud watershed shows a decrease in water quality, as a result of increasing the EC, TDS and SAR characteristics in year 2004 that indicates a decrease in river water quality due to land use change and accordance with the occurrence of droughts in the year 2003-2004.
Ali Ramezani; Mehdi Ahmadimoghadam; Amir Hessam Hassani; Mohamad Reaz Jafari
Abstract
From the past, the rivers were the agent of engender of municipal, industrial and agricultural centers beside the rivers. By increasing the population, growing the technology, increasing the use of water resources and abnormal occupation, the quality condition of rivers are changed. In this respect, ...
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From the past, the rivers were the agent of engender of municipal, industrial and agricultural centers beside the rivers. By increasing the population, growing the technology, increasing the use of water resources and abnormal occupation, the quality condition of rivers are changed. In this respect, the analysis of the qualitative data and the investigation of local information could help us in affecting the quality of rivers for zonation and management control to the accepted level of standard for various usages. Godarkhosh, one of the country's border rivers in Iran-Iraq border, is located in Ilam Province, with its basin of about 1202.68 km2. The research area is Godarkhosh river basin which starts from its entrance to the province to its outlet to Iraq. Required parameters such as monthly Biological Oxygen Demand, Total Phosphate, Nitrate, Focal Coliform, Total Suspended Solids, Dissolved Oxygen, Turbidity, pH, and Temperature were measured in 10 sampling stations of Sheshdar, Tanghamam, Tasfiehkhaneh, MehdiAbad, Banvizeh, Chamab, Gardaneh Ghala, Ghebleh, Pole Felezi, and Pole Shekasteh, from autumn to winter 2010. Several studies have been performed regarding surface water quality mainly investigating the effect of unnatural water pollutants. In this research, the reciprocal effects of natural and unnatural factors on river water quality were investigated. Compilation of laboratory results with quality index information layers within the GIS environment demonstrated that Mehdi Abad sampling station with 47.33 NSFWQI quality index is in a bad and the rest of the sampling stations with 50 to 70 NSFWQI quality index are in the average situation.
Mohammad Shabani
Abstract
Selection and accuracy of the appropriate methods for zonation and preparing the map of groundwater quality parameters depend on regional condition and availability of data which is an important stage for groundwater management of the region. The purpose of this research is determining the most suitable ...
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Selection and accuracy of the appropriate methods for zonation and preparing the map of groundwater quality parameters depend on regional condition and availability of data which is an important stage for groundwater management of the region. The purpose of this research is determining the most suitable interpolation method for determining salinity (EC), nitrate (NO3), pH and total dissolved salts (TDS) parameters of groundwater and mapping of them by using of geographic information systems in Neyriz plain located in southeast of Fars province. For this aim, different methods of geostatistics including ordinary kriging (OK) and simple kriging (SK) as well as deterministic methods such as inverse distance weights (IDW), radial basis function (RBF), local polynomial interpolation (LPI) and global polynomial interpolation(GPI) were used. The result based on the lowest root mean squared error (RMSe) and mean absolute error (MAE) showed that simple kriging (SK) method is the most appropriate method for salinity (EC) mapping (RMSe=3907.53 and MAE=2911.05), TDS mapping (RMSe=2587.19 and MAE=1936.48), pH mapping (RMSe=0.196 and MAE=0.143) and NO3 mapping (RMSe=4.868 and MAE=3.839) among all the methods in the study area. Finally, the results of this research indicated that geostatistical methods have higher priority than deterministic methods and thus are selected as suitable methods in Neyriz plain.
