Sensitive coastal areas are one of the most valuable habitats in the world. The purpose of this study is to zoning of wastewater pollution in Boujagh International Wetland. This research has been done by field method. At first, in order to facilitate the research work, using the networking technique, the whole study area was divided into 33 cells or 500 hectare assessment units (2.2 × 2.2 km networks). Then each criterion was quantified through scoring method (weighing). Quantifying the criteria was done by numeral weighing with restricted domains. Scoring criterion was done in six-step domains from at least 0 to at least 5. The ArcView software was used to draw maps. The research findings indicate that the study area is ecologically sensitive. Of course, the degree of ecological sensitivities varies in different places. The results show that only 3 parameters of nitrite (1.2 mg/l), Potassium (8.1 mg/l) and Co (0.8 μg/l) are in the standard range and the rest of the measured parameters are higher than the allowable limit. Also, the amount of TDS (450 mg/l) and nitrate (0.9 mg/l) was evaluated as average compared to the standard. In order to control the entry of sewage pollution into the wetland and its surrounding votes, it is necessary to take legal and administrative measures immediately. تفاصيل المقالة

The aim of this study was to evaluate the physicochemical properties of downstream water of Aras river dams. Sampling was performed from early 2018-2019 in selected stations. Heavy metals were measured by atomic absorption spectrometry. Nitrate, nitrite and total dissolved solids concentrations were also measured by spectrophotometer. Concentrations of Ca, Na and K were measured with a Flame Photometer and the rest were measured with specialized devices. The results showed that the lowest electrical conductivity in the measured samples was 0.789 and the highest was 4.346 µs/cm, which basically indicates the high limit of soil and water for irrigation of plants. On the other hand, total solids with 1211 ppm indicate a moderate limit for salinity. Also; regarding pH, the average recorded for the study area is 8.17, which is within the national permissible and standard range of the world health organization. Nitrate and nitrite are both above the permissible and standard range. Potassium is within the permitted and standard range. Calcium, according to the average obtained in the study area (64 ppm) can be said that this parameter is within the allowable and standard range. In the case of lead (0.09 ppb), it can be said that this parameter is within the allowable and standard range. In the case of cadmium (0.8 ppb), it can be said that this parameter is within the allowable and standard range, 3 parameters nitrate, nitrite and TDS have an average higher than the national standard. تفاصيل المقالة