小流域盆地의 洪水特性과 地形變數와의 關係 = The Effect of the Geomorphological Paramenters affected by Urbanization on the Flood Characteristics of Small Drainage Basin

다국어 초록 (Multilingual Abstract)

In this study, it is intended to extract the geomorphological parameters to explain the flood characteristics of small drainage basin, and to predict the changes of the flood characteristics when urbanization proceeds at small drainage basin. The parameters of the flood characteristics consist of lagtime, relative lagtime, and specific discharge. And the geomorphological parameters are divided into the parameters affected by urbanization and the parameters unaffected by urbanization.
The relationships between the Hood characteristics from unit hydrograph and various geomorphological parameters are analyzed by means of multiple regression analysis, and the results are as follows.
(1) The parameters such as relative lagtime and specific discharge are irrelevant to the size of drainage basin, so those parameters from regression equations may be good index to explain the food potential of the ungauged small drainage basin.
(2) Lagtime, relative lagtime, and specific discharge from unit hydrograph are significantly responsible to λ-index, which is affected by urbanization.
(3) λ-index does not change constantly according to the addition of artificial channel, but the change of λ-index is dependent upon the characteristics of network and the position where the artificial channels are added, So, the lagtime does not always decrease and specific discharge does not always increase due to the addition of the artificial channel.
(4) Except λ-index, the geomorphological parameters explaining the Hood characteristics are concerned with the changes of interior link's length and drainage area.
(5) The parameters used in the regression equations are dimensionless ones, or the values per unit drainage area, or the mean value of the size of drainage basin. Therefore, it is possible not only to predict the effect of urbanization at the same drainage basin but also to compare the flood potential and the effect of urbanization of different drainage basins.

목차 (Table of Contents)

• 1. 序論
• (1) 硏究目的
• (2) 硏域盆地의 槪觀
• 2. 單位流量姻와 洪水特性 變數
• (1) 單位流量圖
• (2) 洪水特性 變數의 채댁
• 3. 地形變數
• (1) 都市化에 영향을 받지 않는 地形變數
• (2) 都市化에 영향을 받는 地形變數
• 4. 資料의 分析
• (1) 遲滯時間과 地形變數
• (2) 相對約 遲滯時間과 地形變數
• (3) 洪水尖度와 地形變數
• (4) λ-index
• 5. 要約 및 結論