نشریه زمین شناسی محیط زیست
پیاپی 55 (تابستان 1400)

The Ghezel Ozan River, the longest river system in the country, has responded to tectonic deformation thoroughly. In this paper the role of lineaments in making of active deformations via detection and characterization of geomorphic anomalies in the Ghezel Ozan River and correlation with magnetic lineaments is specified. In this study, the first fluvial anomalies have been identified on the satellite images and approved through DEM and field observations. Then these anomalies have been correlated with magnetic lineaments extracted from aeromagnetic maps and so the sub-surface active folds and faults have been recognized. Most ofthemagnetic lineaments in the Ghezel Ozan River basin have caused the geomorphic anomalies in the length of the river. The lineaments with trend of NW - SE have created various anomalies such as variations of channel pattern of the river, deflection of the river course and knick points in longitudinal profile of the river. The lineaments with trend of NE - SW have only straightened the course of the river.

Due to increasing urbanization and industrial development, environmental pollution has increased and heavy metals are one of the most groups of pollutant. Sediments act as indicators of heavy metal in coastal environment, they are the main reservoir of heavy metals. Inorder study about environmental pollution and the andemic species, sediments and T. mutabilis samples were collected from 5 transects (South Golshahr, Khaje Ata, Posht-e- shahr, Jahanbar rahe Se, Soro) of the Bandar Abbas (NE Persian Gulf) in cold and warm season, and the metal concentrations were determined for them. Metals contents were analyzed by using ICP-MS. Statistical analysis was performed with SPSS 18.0 software. The highest amount of metals belongs to Fe, Al, Mn in warm and cold season. Sediment quality was measured by Contamination Factor. Cd, As, Hg, Zn, Cu & Pb levels in sediments from all transects higher than the recommended values of standard (USEPA ,1996; ROPME, 2003).

The main aim of this paper is the hydrochemical evaluation of groundwater and Its impact on the quality of groundwater resources in order to check its suitability for drinking and irrigation In Alut area located in northwestern Iran. Geologically, metamorphism rocks are present in most parts of the Alut area for example Gneiss, Green schist, sericite schist, slate and metaryholite. In order to evaluation of groundwater quality and hydrochemical assesment, samples were taken from 50 wells and springs in the study area and the amount of heavy metals as well as its various parameters were measured. In the studied area, the groundwater facies belong to the calcic bicarbonate type and generally hard water due to the total hardness. In terms of EC and sodium adsorption ratio (SAR), Na% and residual sodium carbonate (RSC), the groundwater is totally suitable for irrigation. Moreover, dissolved heavy elements concentrations in the groundwater of the Alut area have the safe limits which recommended by the WHO. Based on the ionic ratios, Gibbs diagram, saturation index and multivariate analysis indicate that silicate sources had a relatively large impact on water chemistry in the Alut area. These calculations also showed that the groundwater source in the Alut area generally originated from weathering and interactions between silicate water and rock. Based on these studies, ground waters in Alut area are suitable for drinking, irrigation and agriculture and are chemically of a calcium bicarbonate type, and hard. Statistical studies show similar results between factor analysis and cluster analysis.

Mighan Lagoon is located in the Central Province, 15 km northeast of Arak and southwest of Dawoodabad. In order to determine the sampling stations of this seasonal wetland, first, it was done in the field, then in the parts where it seems that natural and artificial changes in water quality can be seen, 12 samples were taken and quality points in these samples. became. Using NSFWQI and IRWQISC indicators, the quality status of the lagoon was checked. Also, using the geographic information system, a map of zoning and indicators was prepared. The results of the comparisons measured in summer and autumn showed the errors of biological desirability factors, chemical desirability properties, solution, electrical conductivity, fecal coliform, nitrate, phosphate, hardness, and acidity were more in summer than in autumn. The results of the water surface quality index show that the situation in summer and autumn is in bad and very bad condition. NSFWQI results show that in general the situation in summer and autumn is in bad and moderate condition. NSFWQI index zoning map in the summer and autumn seasons showed that the wetland was recorded in poor quality only in a small area near the entrance of the house.