نشریه زمین شناسی محیط زیست
پیاپی 51 (تابستان 1399)

Waste disposal site selection is a critical issue in the urban planning process because of its enormous impact on the economy, ecology, and the environmental health of the region. Waste disposal site selection process aims to locate the areas that will minimize hazards to the environment and public health. The purpose of this study was to determine suitable waste disposal site selection by using the geographical information system and the analytic hierarchy process (AHP) in the study area. In this study first, with using related equations was calculated adequate area to burial chghabale solid waste for 20 years then by using of many data layers such as lithology, land use, soil, road, groundwater and … by using GIS and AHP model was attempted to choice the best location for burial waste of chghabale. According to the results obtained from the map for the site selection of landfill, 15.36%, 20.34%, 27.56%, 29.08% and 7.62% of the site area are located in the very unsuitable, unsuitable, moderate, suitable and the best suitable area, respectively.

Water quality assessment is an important step for optimal and proper use of water resources for drinking and selection of suitable and consistent water quality patterns. Therefore, the necessity of studying water qualitycharacteristics in water resource management programs has been highly considered. in this study, the water quality dada of Sirjan Plain, were gathered water quality data from 2002 to 2015, were analyzed by AqQA and SPSS software, and then evaluated using Schuler,Wilcox, and Stiff charts,in the next step by the data 2015 from(GIS) system,Interpolation method(IDW)was used to provide water quality zoning maps. The analysis results showed that the water quality, The groundwater piper diagram of the study area has the dominant Na-Cl facies and is grouped to saline waters. According to the Wilcox chart, agricultural water is predominantly saline and highly saline (C3 ,C4), According to the Schuler diagram, drinking water is of medium to completely unpleasant quality, And in terms of stiff diagrams, groundwater is in the type of sodium chloride and chlorinated water. The concentration of arsenic in many areas of this plain is above the standard .The data of the present study show One of the problems of water resources in Sirjan plain is the high amount of salt and soluble substances, Which shows the great influence of geological formations (evaporation) on groundwater resources and reducing the quality of water resources.

Estimation of suspended sediment load is one of the most important factors in the hydraulic, morphological and hydraulic behavior of river sediments  and the basis of proper management of water and soil resources in Drainage basin. Estimation of the total suspended load of the river is often possible with the data measured in hydrometric stations from establishing the relationships of sediment measurement curves using conventional methods. In this paper, the amount of sediment estimation in Damavand Drainage basin has been estimated through statistics recorded in Mamlu hydrometric station. The main rivers of Damavand Drainage basin are Damavand and Siahroud rivers. Damavand river which flows from east to west of the basin and while passing through Damavand city, Tarroud, Arab chenarha, Gilavand, Hesare paeen, Mara, Kajan, Tamisan, Zareh Dar and Siah Sang, after 48 km, finally in Yurd Shah It joins Jajroud river. For this purpose, these statistics (related to Damavand Drainage basin) were received from Tamab Company. According to the study, the average annual bed load in Damavand Drainage basin is 46395.332 tons, the total discharge of sedimentary materials is 2783.2192 tons and the specific sediment production of the basin is on average 3665.12 tons per square kilometer. The results of this study show that Karaj Formation, due to its area in Damavand Drainage basin, has the largest share in sediment production.

Mines extraction through contaminants that enter water, soil and air can cause huge environmental disasters and even endanger human health. Environmental impacts assessment is a viable solution to overcoming environmental challenges to achieve sustainable development. The aim of this study was to evaluate the environmental effects of Forumad chromite mine in Sabzevar. This research was a survey and the research method is descriptive-analytical mathematical model type which has been done in two quantitative and qualitative stages. For this purpose, all factors and components affecting the environment, including atmosphere, contains air quality and sound comfort; Biosphere contains ecology; The hydrosphere, including surface and groundwater and lithosphere, which contains land use, surface facilities, underground facilities, landscape of region and the soil of the region, was examined and scored by experts. Mineral environmental effects were evaluated and finally, by using the mathematical model of Phillips, the indicators of sustainable development of the mine in environmental components were quantified and analyzed. As respect that the value obtained for environmental components is greater than zero, the project has been evaluated as environmentally sustainable. However, the results of the environmental components indicate that the mine will damage the air quality, groundwater and soil of the region.

Hashtrood region is located in the southwest of East Azerbaijan province. The main source of drinking water through underground water supply residents there. In order to evaluate groundwater quality, water resources, including 9 throat of deep wells to a depth of 70 to 90 meters in two periods (wet and dry) in compliance with the required standards were sampled for chemical analysis were transferred to specialized laboratories. Data obtained from this evaluation for the purpose of processing and interpretation of the sign were to Rock Works and Geochemistry software’s. In this research, piper diagrams have been used to determine the type and geochemical facies of groundwater. To study and evaluate water for industrial use, the Langelier index has been used in which the criterion of water scaled and corrosive is considered. According to Schuler diagram, the water samples of this area are in the acceptable water range, which indicates that the water quality of the area is desirable for drinking purposes.The water quality of the area for industrial use is in the corrosive category in most samples .Samples of groundwater from Hashtrood city has high hardness ,which is usually influenced by the deceleration of Ca and Mg that there is often bicarbonate ion and chloride sulfate in the water.The corrosive nature of the water in the area leads to the pert of water in the urban supply system, which will cause health problems and material damage.

The most important river in the city of pardis at the east of Tehran , is Jajrood . In this research 16 samples of sediment of this river were studied that collected in early July (2018). These samples were analyzed to determine the concentration of Fe , Cr , Cd , Zn , Pb , Cu , Co , Hg , As and Mn elements with TCP method for heavy metals. The Jajrood River sediments are contaminated with Zinc, lead and at some stations to copper and manganese and Cadmium. The possible source of copper and lead elements is the discharge of construction waste and road construction, agricultural and horticultural activities, residential areas and industry activity near the river. The increase in manganese concentration at Sanjrian station is due to human activities, including agriculture, horticulture and residential areas near the river. Conclusion the principal component is consistent with the results of cluster analysis. Based on statistical analysis, it can be said that iron, cobalt, chromium and zinc have the same source (Lithogenic). This article also discusses cadmium and arsenic as a common source (Anthropogenic) and also provides a separate source (Anthropogenic) for lead.