مجله آب و فاضلاب

مجله آب و فاضلاب

خصوصیات اندازه ذرات رسوبات معلق انتقالی در جریان پایه و سیلابی رودخانه

نوع مقاله : یاداشت‌ فنی

نویسندگان
1 دانش‌آموخته کارشناسی ارشد گروه مهندسی آبخیزداری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور
2 دانشیار گروه مهندسی آبخیزداری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور
چکیده
مطالعه حاضر با هدف بررسی خصوصیات اندازه ذرات رسوبات معلق انتقالی در جریان پایه و سیلابی رودخانه کجور واقع در حوزه آبخیز جنگلی کجور با مساحت حدود 50000 هکتار انجام پذیرفت. به‌منظور تعیین و آنالیز توزیع اندازه ذرات، پس از نمونه‌برداری رسوبات معلق از جریان طی مقاطع مختلف زمانی، از قانون استوکس و روش پیپت اصلاح شده و نیز نرم‌افزار GRADISTAT استفاده شد. نتایج حاصل از تحقیق نشانگر اختصاص به‌ترتیب 81/1، 3/4 و 15/3 درصد در جریان پایه و 56/5، 17/0 و 26/5 درصد در شرایط سیلابی برای ذرات ماسه، لای و رس بود.
 
 
 
کلیدواژه‌ها

عنوان مقاله English

Particle Size Characteristics of Suspended Sediment Transported in River Base and Flood-Flows

نویسندگان English

Mahbobeh Kiani Harchegani 1
Seyed Hamid Reza Sadeghi 2
1 Graduated Student of Watershed Management, Dept. of Natural Resources and Marine Sciences, Tarbiat Modarres Universicy, Noor
2 Assoc. Prof. of Watershed Management, Dept. of Natural Resources and Marine Sciences, Tarbiat Modarres University, Noor
چکیده English

This present study was conducted to determine particle size characteristics of suspended sediments transported by base and flood-flows in theKojurRiverin Kojur forest watershed with an area of 50000 ha. Sediment samples were analyzed based on Stokes’ law using a modified pipette and applying the GRADISTAT software. Results showed 81.1, 3.4 and 15.3% for sand, silt, and clay, respectively, in base flow conditions while under flood conditions, the same values were 56.5, 17.0 and 26.5%.
 
 

کلیدواژه‌ها English

Particle size distribution
Suspended sediment concentration
Base flow
Kojur Watershed
Mazandaran
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