کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
708106 1461089 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of 1-D and 2-D models for discharge prediction in straight compound channels with smooth and rough floodplain
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Evaluation of 1-D and 2-D models for discharge prediction in straight compound channels with smooth and rough floodplain
چکیده انگلیسی


• Nine discharge-predicting methods in vegetated waterways are evaluated.
• The SKM and DCM-ID models are found to be more accurate and less accurate, respectively, than other models under the evaluated conditions.
• The accuracy of the SKM increases with the relative depth in the range of Dr studied in this study.
• The subdividing lines must be excluded in the DCM's wetted perimeter calculation.

Accurate estimation of discharge capacity of flooding rivers is extremely important in flood control projects. Floodplains are often covered with vegetation which generally increases the flow resistance, and affects the conveyance capacity. Several numerical methods have been proposed by researchers for predicting the stage-discharge relationship in compound channels. The hydraulic behavior of compound channel flow with vegetated floodplains is very complex. Hence, the accuracy of numerical discharge prediction methods must be investigated in compound channels with vegetated floodplain. In this paper, experimental results are presented for flow capacity of an asymmetric compound channel with vegetated and non-vegetated floodplain. An attempt has been made to compute the discharge with different 1-D and 2-D methods, including Single Channel Method (SCM), Divided Channel Methods (DCMs), Coherence Method (COHM) and Shiono and Knight Method (SKM). The results are then compared with experimental data. The results show that the SKM model is more accurate in discharge prediction than other models studied in the present study. Also, the DCM-ID model is found to be less accurate in discharge prediction in compound channels with smooth or rough floodplain.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flow Measurement and Instrumentation - Volume 49, June 2016, Pages 63–69
نویسندگان
, , ,