The Effects of Protruding Rock Boulders in Regulating Sediment Intrusion within the Hyporheic Zone of Mountain Streams
文献类型：期刊论文
| 作者 | Dimitrios DERMISIS ; A.N. Thanos PAPANICOLAOU |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2014-11 |
| 卷号 | 11期号:6页码:1466-1477 |
| 关键词 | Spawning Gravel Boulders Sand Intrusion Sedimentation |
| 通讯作者 | A.N. Thanos PAPANICOLAOU |
| 英文摘要 | Excessive sedimentation in mountain stream ecosystems is a critical environmental problem due to the clogging of streambeds by sediment particles within the hyporheic zone, with detrimental effects on fish spawning habitat. In this research, the effects of an array of boulders in regulating the intrusion of incoming sand within a gravel substrate were evaluated by performing detailed experiments in a laboratory flume. A unique experimental setup and two different sampling techniques were utilized for measuring the infiltrated sand within the gravel bed under two bed shear stress conditions (moderate vs. high). For comparison purposes, experiments were performed without and with the presence of partially submerged to the flow (protruding) boulders, which is typical for the average flow conditions found in mountain streams. Results indicated that sand infiltrated primarily in the upper part of the gravel bed creating a surface seal which hindered the penetration of sand particles deeper into the bed. An exponential decrease of the amount of the infiltrated sand within the hyporheic zone was observed in all experiments regardless of the presence of boulders. However, the presence of boulders promoted sediment intrusion of sand particles especially for the moderate applied bed shear stress condition, since the total amount of the infiltrated sand was found to be on average 44% greater when boulders were present. The findings from this study can provide additional insight regarding the role of boulders on promoting downwelling of flow and sediment within the gravel substrate with potential effects on fish habitat. |
| 收录类别 | SCI |
| 公开日期 | 2014-11-18 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/7415]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2014_Vol11 No.6 |
| 推荐引用方式 GB/T 7714 | Dimitrios DERMISIS,A.N. Thanos PAPANICOLAOU. The Effects of Protruding Rock Boulders in Regulating Sediment Intrusion within the Hyporheic Zone of Mountain Streams[J]. Journal of Mountain Science,2014,11(6):1466-1477. |
| APA | Dimitrios DERMISIS,&A.N. Thanos PAPANICOLAOU.(2014).The Effects of Protruding Rock Boulders in Regulating Sediment Intrusion within the Hyporheic Zone of Mountain Streams.Journal of Mountain Science,11(6),1466-1477. |
| MLA | Dimitrios DERMISIS,et al."The Effects of Protruding Rock Boulders in Regulating Sediment Intrusion within the Hyporheic Zone of Mountain Streams".Journal of Mountain Science 11.6(2014):1466-1477. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。