جستجوی مقالات مرتبط با کلیدواژه "river water quality" در نشریات گروه "محیط زیست"

The research aimed to evaluate the water quality of the Cangkring River in Tuban Regency, East Java Province, Indonesia, at the segment near the oil and gas fields (Mudi Pad A, B, and C). Water samples were collected from January to September 2021 at seven locations along the river segment and tested ex-situ using six parameters, including physical, chemical, and microbiological. The pollution index formula was used to calculate, determine, and analyze the river water quality status. Samples at three locations were further tested with 13 additional chemical parameters due to potential contamination by other substances as they were located the closest to the production site and office area. Sample analysis with six parameters showed a pollution index value of 0.558 or within the predefined standard at one location (SW6) and 1.080–2.721 at the other six locations, indicating slight pollution. Another test at three selected locations (i.e., SW1, SW2, and SW7) with 13 additional parameters increased the pollution index to 5.556–6.170 (moderate pollution). This status change was due to the high presence of nitrite and ammonia in the water samples. The oil and gas industry near the Cangkring River has strictly complied with the regulations in treating their produced water. However, it still contains a high amount of nitrite and ammonia, moderately polluting the river water. Therefore, it is necessary to regularly test the river water near oil and gas fields to ensure its quality and safety.

Evaluation of surface water quality is a complex process undertaking multiple parameters. Converting great amount of parameters into a simpler expression and enabling easy interpretation of data are the main purposes of water quality indices. The main aim of this study is to plan effective water resources management system for Karun River by combination of CCMEWQI and Geographic Information System (GIS). The investigation was carried out to set a management plan through exploratory and spatial analysis of physicochemical water parameters of collected samples from 10 stations over one year period. Since all indices were obtained from index, river zoning was conducted by GIS. Moreover, trace metals concentrations (As, Cr, Cd, Fe, Zn, Mn, and Al) ranged in safer limit. The highest values of F1 belonged to aquatic life and the lowest ones belonged to irrigation. Aquatic life and drinking uses received the maximum values of F2. The lowest values were devoted to livestock and then recreation uses. It was inferred from index that the quality of the Karun River is principally impacted by high turbidity, TDS, NO3, SO4, and PO4 due to high suspended sediment loads. The main cause is incremental agricultural, industrial, and residential effluents. Amongst stations, station one only received the priority for drinking water supply and recreation.