نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد, گروه مهندسی عمران, دانشکده عمران و محیط‌زیست, دانشگاه شهید بهشتی, تهران, ایران
2 دانشکده مهندسی عمران، آب و محیط زیست، دانشگاه شهید بهشتی
3 دانشجوی دکتری، گروه مهندسی عمران، دانشکده عمران و محیط زیست ، دانشگاه شهید بهشتی تهران،ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In recent years, the unprincipled increase in agricultural activities along rivers and the discharge of domestic sewage, agricultural and industrial effluents has caused a sharp decrease in the quality of surface water. Contaminated or exposed water sources can have a negative effect on the entire life cycle. In this research, the trend of water quality changes in Neka River from its source to the junction with the Caspian Sea has been investigated. Sampling was done and analyzed in different seasons of 1400 and at three stations along the river, and the values were checked with IRWQIsc and NSFWQI standards. The results showed that according to the IRWQIsc index, the river is in the relatively good quality category and according to the NSFWQI index, it is in the quality category, but in station 3, according to both indicators, the river is in the relatively bad to bad quality category. The overall quality of water from the source to the outlet follows a decreasing trend and its reduction is greater in the warmer seasons than in the colder seasons, the highest reduction in quality occurs in the spring season, which is due to the increase in agricultural activities in the river basin, and the lowest amount in the seasons It is cold especially in winter.
کلیدواژه‌ها [English]
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