Gm. Kondolf et Ml. Swanson, CHANNEL ADJUSTMENTS TO RESERVOIR CONSTRUCTION AND GRAVEL EXTRACTION ALONG STONY-CREEK, CALIFORNIA, Environmental geology, 21(4), 1993, pp. 256-269
Citations number
19
Categorie Soggetti
Water Resources","Environmental Sciences","Geosciences, Interdisciplinary
Stony Creek (drainage area 1920 km2), a tributary to the Sacramento Ri
ver 200 km north of San Francisco, has experienced channel adjustments
to both dam construction and instream gravel extraction. Black Butte
Dam, constructed in 1963, reduced flood peaks and trapped the annual 1
00,000 m3 of bedload sediment formerly delivered from the upper waters
hed. The reach below the dam changed from an active braided channel to
an incised, single-thread channel shortly after dam construction. Abo
ut 25 km downstream of the dam, large instream gravel mines annually e
xtract 230,000-580,000 m3 and have induced channel incision of over 5
m, necessitating bridge repairs costing US$1.4 million.