| Title |
Flood Stage Evaluation for Vegetated Models in River Scales |
| Keywords |
flood stage evaluation;vegetated models;clearance space rate(CSR);river scales;numerical models;홍수위 검토;식생모델;제방고 여유율;하천규모;수치모형 |
| Abstract |
This study aims to evaluate for flood stage on vegetated patterns by clearance space rate (CSR) using the numerical models divided into large, medium and small river in river scales with watershed area or design flood discharge. Using the HEC-RAS(1D) and RMA-2(2D) numerical models, evaluated results of the design flood stages before vegetated modeling of these rivers which CSR in the 1D are obtained over 100% at all points in large river and medium river of except upper part 2 sections, but small river is showed about average 46.0%. It is judge that evaluated results in the 20 are obtained average 101.5% in large river, 96.7% in medium river, 71.1% in small, respectively and because of 10 mainly used to formulate of the river’s master plan. However, after vegetated modeling, CSR in case of 10 showed with 91.8% in large river, 74.2% and 38.3% in medium and small rivers, respectively and 20 showed with 95.5% in large river, 86.72 and 37.0% in medium and small rivers, respectively. It is estimate that evaluated results using the 2 numerical models by the vegetated modeling are less affected the CSR for large river in a large area more than the cross section area in medium and small rivers. |