IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2004  > Vol1 No.3
Channel response to gravel mining activities in mountain rivers
José Luis López S
Corresponding AuthorJosé LLS
2004-12
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6321
Volume1Issue:3Pages:264–269
AbstractThe 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.
KeywordChannel Response Gravel Mining Venezuelan Cases
Language英语
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6183
CollectionJournal of Mountain Science _Journal of Mountain Science-2004_Vol1 No.3
Recommended Citation
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.
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