Abstract
A study on sediment transport and channel change was conducted on Zayante Creek and the lower San Lorenzo River in Santa Cruz County, California. A rainstorm with a recurrence interval locally in excess of 150 years occurred during the study year, 1982 WY. Stream surveys indicated that significant aggradation occurred during and after the peak flood. Upper study reaches were substantially recovered after high flows of early April, but the lower study reaches still had significant filling of pools and burial of riffles by sand. Increases in width-depth ratio were minor and localized in upper reaches, but were significant in lower reaches. Large inputs of sand, primarily from landsliding, altered the sediment transport regime. A higher proportion of the bedload is now transported by lower flows than before the January event. Roads and sand quarries contributed significantly to sediment input to the stream. A proposed dam may alter the sediment transport regime of Zayante Creek. Mitigating the effects of this dam on downstream fish habitat may require occasional bankfull discharges.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 35-48 |
| Number of pages | 14 |
| Journal | Environmental Management |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1985 |
| Externally published | Yes |
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Keywords
- Channel change
- Fish habitat
- Flood effects
- Geomorphic effectiveness
- Sediment transport
ASJC Scopus subject areas
- Environmental Chemistry
- Environmental Science(all)
Cite this
Channel change, sediment transport, and fish habitat in a coastal stream : Effects of an extreme event. / Coats, Robert; Collins, Laurel; Florsheim, Joan; Kaufman, Darrell.
In: Environmental Management, Vol. 9, No. 1, 01.1985, p. 35-48.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Channel change, sediment transport, and fish habitat in a coastal stream
T2 - Effects of an extreme event
AU - Coats, Robert
AU - Collins, Laurel
AU - Florsheim, Joan
AU - Kaufman, Darrell
PY - 1985/1
Y1 - 1985/1
N2 - A study on sediment transport and channel change was conducted on Zayante Creek and the lower San Lorenzo River in Santa Cruz County, California. A rainstorm with a recurrence interval locally in excess of 150 years occurred during the study year, 1982 WY. Stream surveys indicated that significant aggradation occurred during and after the peak flood. Upper study reaches were substantially recovered after high flows of early April, but the lower study reaches still had significant filling of pools and burial of riffles by sand. Increases in width-depth ratio were minor and localized in upper reaches, but were significant in lower reaches. Large inputs of sand, primarily from landsliding, altered the sediment transport regime. A higher proportion of the bedload is now transported by lower flows than before the January event. Roads and sand quarries contributed significantly to sediment input to the stream. A proposed dam may alter the sediment transport regime of Zayante Creek. Mitigating the effects of this dam on downstream fish habitat may require occasional bankfull discharges.
AB - A study on sediment transport and channel change was conducted on Zayante Creek and the lower San Lorenzo River in Santa Cruz County, California. A rainstorm with a recurrence interval locally in excess of 150 years occurred during the study year, 1982 WY. Stream surveys indicated that significant aggradation occurred during and after the peak flood. Upper study reaches were substantially recovered after high flows of early April, but the lower study reaches still had significant filling of pools and burial of riffles by sand. Increases in width-depth ratio were minor and localized in upper reaches, but were significant in lower reaches. Large inputs of sand, primarily from landsliding, altered the sediment transport regime. A higher proportion of the bedload is now transported by lower flows than before the January event. Roads and sand quarries contributed significantly to sediment input to the stream. A proposed dam may alter the sediment transport regime of Zayante Creek. Mitigating the effects of this dam on downstream fish habitat may require occasional bankfull discharges.
KW - Channel change
KW - Fish habitat
KW - Flood effects
KW - Geomorphic effectiveness
KW - Sediment transport
UR - http://www.scopus.com/inward/record.url?scp=0002214541&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0002214541&partnerID=8YFLogxK
U2 - 10.1007/BF01871443
DO - 10.1007/BF01871443
M3 - Article
VL - 9
SP - 35
EP - 48
JO - Environmental Management
JF - Environmental Management
SN - 0364-152X
IS - 1
ER -