| Title |
Analyzing the Reduction of Runoff and Flood by Arrangements of Stormwater Storage Facilities |
| Authors |
박청열 ( Changyeol Park ) ; 신상영 ( Sang Young Shin ) ; 손은정 ( Eun Jung Son ) |
| Keywords |
Flood damage; Runoff reduction; Storm water storage facilities; XP-SWMM |
| Abstract |
This study analyzes the reduction effects of runoff and flood damage through different arrangements of stormwater storage facilities. Three scenarios based on the spatial allocation of storage capacity are used: concentrated decentralized and combinative. The characteristics of runoff and flood damage by scenario are compared. The XP-SWMM model is used for runoff simulation by the probable rainfall of return period. The result shows that the concentrated arrangement of storage facilities is most effective to reduce the amount of peak flow and to delay the time of peak flow. Yet while the concentrated arrangement is most effective to reduce the inundation damage it is not effective to reduce runoff volume. The decentralized arrangement is most effective to reduce runoff volume. The combinative arrangement is effective not only the runoff reduction but also the reduction of flood damage. The result indicates that the flood mitigation strategies against heavy rainfall need to consider decentralized on -site arrangement for the reduction of runoff volume along with concentrated off-site arrangement of storage facilities. |