原文传递
Preliminary Study of Scour in Bottomless Culverts.
| 题名： | Preliminary Study of Scour in Bottomless Culverts. |
| 作者： | crookston, b. m. tullis, b. p. |
| 关键词： | stream flow, design, channels(waterways), substrates, fishes, fish barriers, fish migration, fish passage facilities, sediments, hydraulic structures |
| 摘要： | Many traditional culvert designs develop into fish barriers due to excessive channel degradation. Increased concern for and interest in better facilitating fish migration or passage through culverts have fostered alternative culvert designs. Such culvert designs include buried-invert and bottomless culverts. The goal of buried-invert and bottomless culvert designs is to minimize discontinuity between the adjacent natural channel reaches by, in most cases, installing a culvert of sufficient size as to span the entire channel width. The large culverts minimize the discontinuities in channel width and flow velocities between the culvert and the adjacent channel reaches. The buried-invert or bottomless culvert geometries also help natural sediment transport processes. Bottomless culvert research, to date, has primarily focused on fish passage; there is a limited understanding of the hydraulic characteristics of bottomless and buried-invert culverts. / Supplementary Notes: Sponsored by Alaska Dept. of Transportation and Public Facilities, Juneau. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0710；127p |
| 报告类型： | 科技报告 |
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