Document Type : Case Report

Authors

• Nazli Moghadam Yekta ¹
• Maryam Rafati ²
• Abdolreza Karimi ³
• Nooshin Sadjadi ⁴

¹ PhD Scholar, Department of Environment, Faculty of Technical and Engineering, Islamic Azad University, Tehran North Branch, Tehran, Iran

² Assist. Professor, Department of Environment, Faculty of Marine Science and Technology, North Tehran Branch, Islamic Azad University, Tehran, Iran

³ Assist. Professor, Department of Civil Engineering, Faculty of Engineering, Qom University of Technology (QUT), Qom, Iran

⁴ Assist. Professor, Department of Environment, Faculty of Technical and Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran

Abstract

The Kan River is the largest and most important river that enters the Tehran plain. The river water quality (in Tehran city), is affected by agricultural and industrial activities and population spots. The aim of this study was to investigate the quality of the Kan River using Iran Water Quality Index for Surface Water to protect the environment. For selecting sampling stations, the study area was divided into eight longitudinal ranges, and sampling was done in two periods of minimum and maximum flow. Kan River is of poor to relatively bad quality. The pH was at standard level but some parameters such as BOD in 2 stations (minimum flow‌‌ rate) and 9 stations (maximum flow rate), TSS in 4 stations (minimum flow rate) and 5 stations (maximum flow rate), DO in all samples except station S1(minimum flow rate) and coliform in all samples were more than permissible level of the national standard for river water quality. Entering industrial, municipal, and agricultural wastewater is the most important reason for the decrease in water quality. In terms of the standard classification base of the Iran Department of Environment for Protection of aquatic life, class 2 (suitable for Cyprinid (is recommended.

Keywords

• Protection
• Urban Rivers
• Water Quality Index
• Water Quality Standards

Main Subjects

• water resource management