| Title |
Estimation of Travel Time in Natural River and Dam Outflow Conditions Considering Rainfall Conditions and Soil Moisture Accounting |
| Authors |
김동필(Kim, Dong Phil) ; 김경호(Kim, Kyoung Ho) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.4.0537 |
| Keywords |
도달시간;토양함수상태;재현기간별 강우조건;댐 방류량 조건 Travel time;Soil moisture accounting;Rainfall conditions by frequency;Dam outflow conditions |
| Abstract |
Determination of the time parameters such as the travel time in the design flood is very important. The travel time is mainly used for flood and river management, and the travel time of non flood season is used for maintenance flow and management of the river. Estimation of travel time for natural rivers is mainly based on the geomorphological factors of the basin. In addition to the topographical factors, the travel time is calculated by considering the factors of the runoff curve, velocity and rainfall intensity. However, there is no study on the estimation of travel time considering both the rainfall condition and the soil moisture accounting by the frequency period. Therefore, the travel time calculation is divided into the case of setting the Hwanggang Dam and the Imjin bridge water level station of Imjin river as the natural river considering rainfall condition by the frequency period and the soil moisture accounting, and the case of traveling the Imjin bridge water level station according to the condition of outflow of the Hwanggang Dam. For the sections set as natural rivers, the results were verified by comparing with the newly developed travel time calculation method. Based on the results, the travel times of the Hwanggang Dam outflow conditions were calculated. The time to travel in this study can be secured flood control of the Imjin river basin and time to prepare for danger when outflowing the the Hwanggang Dam. |