【學術亮點】Evaluating stream power distribution along river longitudinal profiles using Log S - log A plots
Ecological Agriculture: Nature-based Solutions for Restoring Ecological Landscapes on Degraded Hillslopes due to Extreme Climate Events【Department of Soil Water Conservation / Chen, Su-Chin / Distinguished Professor】
生態農業：自然解方修復極端氣候退化坡地之生態地景【水土保持學系/陳樹群特聘教授】
| 論文篇名 | 英文：Evaluating stream power distribution along river longitudinal profiles using Log S - log A plots 中文：利用Log S – Log A圖評估河川縱剖面上的溪流功率分布 |
| 期刊名稱 | Journal of Hydrology: Regional Studies |
| 發表年份,卷數,起迄頁數 | 2025, 22, 551-565 |
| 作者 | Tsai, Jui-Tien; Chiu, Yen-Yu; Chen, Su-Chin(陳樹群)* |
| DOI | 10.1016/j.ejrh.2025.102305 |
| 中文摘要 | 本研究聚焦於河川縱剖面上的總溪流功率(TSP)與單位溪流功率（SSP）分析，這兩者是河川動力的重要指標，並以此二指標提出一個新的雙參數迴歸模型，解決傳統模型中的不準確性，並能更精確地描述河川縱剖面。模型結合了凹度、集水面積分布、逕流量與河寬關係，以辨識 TSP 與 SSP 的峰值位置。並利用對數化的河坡度（S）與集水面積（A）關係圖，評估在多樣地貌與水文條件下，這些指標的空間變異性。 透過模型，將台灣的十八條河川依據河源高程與「集水面積－河長指數」分為三類。主要研究結果顯示，較低的河源高程的河川具有集水面積分布偏向上游以及更高的縱剖面凹度。這凸顯了集水區內在特性與外部水文作用力之間的交互作用並進而塑造 TSP 與 SSP 的分布。研究結果可作為河川治理、輸砂預測與保育工作提供了重要依據。 |
| 英文摘要 | Study region: Eighteen main rivers in Taiwan. Study focus: This study focused on the analysis of total stream power (TSP) and specific stream power (SSP) along river longitudinal profiles, which are critical indicators of river dynamics. A new two-parameter regression model is proposed, addressing inaccuracies in traditional models and providing a more-precise representation of river profiles. By incorporating concavity, drainage area distribution, discharge, and river width relationships, the model identifies the locations of the TSP and SSP peaks. The study employs log (river slope, S) - log (drainage area, A) plots to evaluate the spatial variability of these metrics under diverse geomorphological and hydrological conditions. New hydrological insights for the region: The model was used to categorize 18 rivers in Taiwan into three groups based on river source elevation and drainage area-flow length exponents. Key findings indicate that lower source elevations correspond to increased upstream drainage-area distribution and greater concavity. This highlights the interplay between intrinsic watershed characteristics and external hydrological forces in shaping TSP and SSP distributions. These insights provide a basis for improved river management, sediment transport predictions, and conservation efforts. |
| 發表成果與本中心研究主題相關性 | 解釋溪流流量、坡度、河寬變化的趨勢 |
