Resistance to sheet flow
| dc.contributor.author | Saghafian, Bahram, author | |
| dc.contributor.author | Julien, Pierre Y., author | |
| dc.contributor.author | Colorado State University Center for Geosciences, Hydrologic Modeling Group, publisher | |
| dc.date.accessioned | 2016-07-07T15:42:49Z | |
| dc.date.available | 2016-07-07T15:42:49Z | |
| dc.date.issued | 1989-01 | |
| dc.description | CER88-89BS-PYJ13. | |
| dc.description | Includes bibliographical references (pages 58-62). | |
| dc.description | January 1989. | |
| dc.description.abstract | The results of a literature review on resistance to sheet flow are presented. The effects of surface roughness, rainfall, and vegetation are considered. At least in the case of laminar flow, it is found that the total flow resistance is the sum of the contributions of individual effects. The friction factor for the surface roughness effect in laminar flow is directly proportional to the relative roughness and varies inversely with the Reynolds number. A power function of rainfall intensity in laminar flow can represent the effect of rainfall on the product of friction factor and Reynolds number. For turbulent flow, however, the friction factor depends on the surface conditions which are partitioned into smooth, transition, and fully rough. The analysis of flow through vegetation is more complex and calls for further studies. For densely vegetated surfaces, the Darcy-Weisbach friction factor is shown to decrease significantly at Reynolds number well beyond the critical value of Re = 2000 for smooth surfaces. In some cases, the flow behaved as laminar flow at Re = 100,000. | |
| dc.description.sponsorship | Funded by the U.S. Army Research Office Grant No. ARO/DAAL 03-86-K-0175. | |
| dc.format.medium | reports | |
| dc.identifier.uri | http://hdl.handle.net/10217/173160 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation | Catalog record number (MMS ID): 991012092219703361 | |
| dc.relation | TA7.C6 CER 88/89-13 | |
| dc.relation.ispartof | Civil Engineering Reports | |
| dc.relation.ispartof | CER, 88/89-13 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject.lcsh | Laminar flow | |
| dc.subject.lcsh | Runoff | |
| dc.subject.lcsh | Hydrodynamics | |
| dc.subject.lcsh | Channels (Hydraulic engineering) | |
| dc.title | Resistance to sheet flow | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- CERF_Saghafian_Julien.pdf
- Size:
- 19.17 MB
- Format:
- Adobe Portable Document Format
- Description:
- Resistance to sheet flow