نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی آب، دانشگاه ارومیه
2 دانشجو دکتری علوم و مهندسی آب
3 دانشجوی دکتری دانشگاه ارومیه
چکیده
حصول روش‌های مناسب و دقیق در پیش‌بینی بار رسوبی رودخانه‌ها به دلیل اثرات منفی آن بر روی شاخص‌های کیفی آب، تقلیل گنجایش مخازن و تغییر در مورفولوژی رودخانه‌ها از اهمیت ویژه‌ای برخوردار است. همچنین بار رسوبی معلق در رودخانه‌ها معمولاً با استفاده از روش‌های هیدرولوژیک تعیین می‌گردد. هدف تحقیق حاضر ارتباط بار معلق رسوب به پارامترهای هیدرولیکی، هیدرولوژیکی و مورفولوژی رودخانه می‌باشد. برای رسیدن به این هدف از روش تحلیل ابعادی استفاده گردید. داده‌های اندازه‌گیری شده از دو ایستگاه هیدرومتری بر روی رودخانه باراندوز در حوضه آبریز مرکزی دریاچه ارومیه جهت استخراج روابط غیرخطی برای پیش‌بینی بار رسوبی معلق مورد استفاده قرار گرفت. ارزیابی مقادیر برآوردی رابطه جدید در مقایسه با داده‌های اندازه‌گیری شده نشان داد که میزان خطای متوسط معادله نهایی در برآورد بار رسوبی معلق در حدود 25 درصد می‌باشد که نشان‌دهنده دقت مناسب رابطه حاصله در برآورد بار رسوبی در رودخانه‌ها است.
کلیدواژه‌ها
عنوان مقاله [English]
Development of an Empirical Formula in Predicting the Suspended Sediment Load by Dimensional Analysis Method (Case Study: Barandoz River)
نویسندگان [English]
- Mohammad Hemmati 1
- Rahim Hamzepouri 2
- iman akbari 3
1 Water eng. dep. Urmia university
2 Doctoral student of Water Sciences and Engineering
3 phd student of Urmia University
چکیده [English]
Obtaining appropriate and accurate methods in predicting the sediment load of rivers is of particular importance due to its negative effects on water quality indicators, reducing the capacity of reservoirs and changing the morphology of rivers. Also, the suspended sediment load in rivers is usually determined by hydrological methods. The aim of the present research is to link the suspended sediment load to the hydraulic-hydrological-morphological parameters of the river. To achieve this goal, dimensional analysis method was used. The measured data from two hydrometric stations on the Barandoz River-Urmia Lake basin were used to extract non-linear relationships in predicting the suspended sediment load. The evaluation of the estimated values of the new relationship revealed that the final presented equation has a 25% error in estimating the suspended sediment load compared to measured data, which indicates the appropriate accuracy in estimating the sediment load in rivers.
کلیدواژه‌ها [English]
- Suspended load
- Dimensional analysis
- Morphology
- River engineering
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