Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34524
標題: 防砂壩魚道水平迴頭彎段之沖刷及淤積試驗
The Scour and Sedimentation in the U-turn Horizontal Section of the Fishway of the Check Dam
作者: Tsai, Ming-Fong
蔡銘峰
關鍵字: the U-turn horizontal section of fishway
魚道水平迴頭彎段
T-bone structure
type of sedimentation
丁骨構造物
淤砂型態
出版社: 水土保持學系所
引用: 李宛珊 2006 『魚道水平迴頭彎段之淤砂試驗』,國立中興大學水土保持學系碩士論文。 段錦浩 1997『防砂壩魚道防止礫石阻塞之研究』,中華水土保持學報,第28卷,第1期。 段錦浩、薛攀文2000 『水土保持對棲地生態改善之研究(二)』,2-1~2-3頁,行政院農委會補助研究計畫。 段錦浩、楊家豪、蘇國振2002 『台灣防砂壩魚道防堵及束水之研究』,中華水土保持學報,第33卷,第4期。 高泉達 2001 『魚道內開口人工砂丘板密度之試驗』,國立中興大學水土保持學系碩士論文。 陳正昌2003 『丁壩工對魚類棲地面積之影響-以蘭陽溪為應用案例』,國立台灣大學土木工程學系碩士論文。 張世倉、李德旺、李訓煌 1998 『烏石坑溪攔砂壩對河川生態的影響及其魚道效用之評估』,中日溪流生態保育研討會論文集,133~150頁。 張永欣 2004 『魚道水平段設置丁骨構造物效能之研究』,國立中興大學水土保持學系碩士論文。 曾晴賢、李淑珠 1987 『魚道的設計指南及案例』,中國水產(419),21-28頁。 葉昭憲、連惠邦、段錦浩、王晉倫 2002 『大甲溪魚類棲地改善工法之實施與成效評估』,中華水土保持學報。 葉順裕 1998 『改良式魚道鋼板柵特性之研究』,國立中興大學水土保持學系碩士論文。 楊家豪 2003 『魚道架設開口式人工砂丘板之加砂試驗』,國立中興大學水土保持學系碩士論文。 鄭恆志1996 『陡坡彎道丁壩佈置之動床試驗』,國立台灣大學農業工程學系碩士論文。 顏正平、羅煌木 1996 『攔河壩與魚道設置對水資源利用及環境生態保育之影響』,水土保持學報,第28卷,第1期,63~72頁。 蘇國振 2002 『魚道複式人工砂丘板開口寬度與高度之試驗』,國立中興大學水土保持學系碩士論文。
摘要: It is recognized that sedimentation is a main factor influencing a fish way whether it is freely flowing. In this study, two experiments, scour experiment and sedimentation experiment, are utilized on the U-turn horizontal section of fishway to examine causes which lead to sedimentation situation. Through scour experiment,the silt clearance capacity of clear-water discharge revealed on U-turn horizontal section of fish way is explored. On the other hand, while proceeding sedimentation experiment some elements are conducted such as changing slop, discharge, sand added particle and setting T-bone structure, etc. Adding sand following by a period time, we inspect how sand particle affects sedimentation furthering to see whether fish way is blocked accordingly. By analyzing experiment data, it is to know as long as the sand is smaller (19.05mm mixed particle under), the sedimentation could be divided into three types. Under different discharges and slops, all those three types of sedimentation could achieve a balance of sand added and collected. That means although there is sedimentation however the fish way is not unlikely to be blocked. On the contrary, while there is bigger sand(50.80mm mixed particle under) the fish way is blocked owing to upstream sedimentation or sediment deposit in U-turn horizontal section. Once there is sedimentation occurred at the U-T-turn horizontal section of fish way, it is difficult to clean away by clear-water discharge. For the reason, setting T-bone structure along with regular management and maintenance could decrease sedimentation. These findings are expected as reference in fish way design of engineering practice.
砂石進入魚道後的淤砂情形是影響魚道是否暢通的主要原因。本研究主要針對魚道水平迴頭彎段,進行兩種不同起始條件之沖刷試驗與淤砂試驗,利用沖刷試驗了解清水流對魚道水平迴頭彎段淤砂之清除能力;利用淤砂試驗,以改變坡度、流量、加砂粒徑及有無設置丁骨構造物等情況下,對魚道水平迴頭彎段淤積情形之影響,並觀察是否會有阻塞魚道之現象。 經由試驗資料分析,當加砂粒徑較小(19.05mm混合粒徑級配)時,能將其淤砂情形分為三種淤砂型態,其在各種流量與坡度下,均能達到加砂、收砂平衡,雖有淤砂產生但不至於阻塞魚道;當採用較大加砂粒徑(50.80mm混合粒徑級配),魚道發生傾斜段淤積或水平迴頭彎段回淤,使魚道阻塞;魚道水平迴頭彎段一旦發生淤砂現象,難以清水流清除淤砂,可搭配設置丁骨構造物並配合人工管理維護定時清淤,希望此研究能對將來在魚道之內部設計方面有所幫助。
URI: http://hdl.handle.net/11455/34524
其他識別: U0005-2007200715553200
Appears in Collections:水土保持學系

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