Channel response to gravel mining activities in mountain rivers
文献类型：期刊论文
| 作者 | José Luis López S |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2004-12 |
| 卷号 | 1期号:3页码:264–269 |
| 关键词 | Channel response gravel mining Venezuelan cases |
| ISSN号 | 1672-6321 |
| 通讯作者 | José LLS |
| 英文摘要 | The removal of bed material from active river channels usually affects the bed profile of the streambed, causing progressive degradation upstream and downstream of the extraction site. These effects can extend for kilometers affecting hydraulic structures located in the vicinity of the river reach. In this paper, the geomorphic effects of gravel mining are reviewed and summarized. Some cases in Venezuelan streams are presented to illustrate the problem. To describe the processes of erosion and sedimentation in a gravel extraction pit, a recent developed mathematical model for the simulation of flow and sediment transport in gravel-cobble bed streams is applied to a hypothetical case of gravel mining in a river channel. A simple rectangular dredge pit is imposed as initial condition in the channel bed, and changes in bed elevations and grain size distribution of bed material are calculated by using the numerical model. The process of deposition within the pit, and the downstream and upstream migration of the erosion wave are well simulated by the model and closely resemble the phenomena observed in laboratory experiments. The response of the friction coefficient to the changes in flow and bed elevations shows the importance in modeling adequately flow resistance and sediment transport in gravel-cobble bed streams. |
| 语种 | 英语 |
| 公开日期 | 2013-08-15 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6183]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2004_Vol1 No.3 |
| 推荐引用方式 GB/T 7714 | José Luis López S. Channel response to gravel mining activities in mountain rivers[J]. JOURNAL OF MOUNTAIN SCIENCE,2004,1(3):264–269. |
| APA | José Luis López S.(2004).Channel response to gravel mining activities in mountain rivers.JOURNAL OF MOUNTAIN SCIENCE,1(3),264–269. |
| MLA | José Luis López S."Channel response to gravel mining activities in mountain rivers".JOURNAL OF MOUNTAIN SCIENCE 1.3(2004):264–269. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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