Santa Ynez River

Santa Ynez River
Río Grande de San Vernardo
Aerial view of the mouth of the river
Map of the Santa Ynez River watershed
Location
CountryUnited States
StateCalifornia
CountySanta Barbara
CitiesSolvang, Lompoc
Physical characteristics
Source 
 • locationTransverse Ranges
 • coordinates34°28′40″N 119°26′51″W / 34.47778°N 119.44750°W / 34.47778; -119.44750[1]
 • elevation4,140 ft (1,260 m)[2]
MouthPacific Ocean
 • coordinates
34°41′31″N 120°36′7″W / 34.69194°N 120.60194°W / 34.69194; -120.60194[1]
 • elevation
0 ft (0 m)
Length92 mi (148 km)[3]
Basin size896 sq mi (2,320 km2)[4]
Discharge 
 • locationNarrows, near Lompoc
 • average127 cu ft/s (3.6 m3/s)
 • minimum0 cu ft/s (0 m3/s)
 • maximum120,000 cu ft/s (3,400 m3/s)
Basin features
Tributaries 
 • leftAlder Creek, Alisal Creek, Salsipuedes Creek, Miguelito Creek
 • rightSanta Cruz Creek, Cachuma Creek, Santa Agueda Creek, Zanja de Cota Creek, Alamo Pintado Creek, Zaca Creek

The Santa Ynez River is one of the largest rivers on the Central Coast of California. It is 92 miles (148 km) long,[3] flowing from east to west through the Santa Ynez Valley, reaching the Pacific Ocean at Surf, near Vandenberg Space Force Base and the city of Lompoc.

The river drains the north slope of the Santa Ynez Mountains, the south slope of the San Rafael Mountains, as well as much of the southern half of Santa Barbara County. Its drainage basin is 896 square miles (2,320 km2) in area.[4] The river's flow is highly variable. It usually dries up almost completely in the summer, but can become a raging torrent in the winter. The river has three dams which can impound a total of 210,000 acre-feet (260,000,000 m3) of water in wet years.

  1. ^ a b U.S. Geological Survey Geographic Names Information System: Santa Ynez River, USGS, GNIS
  2. ^ Google Earth elevation for source coordinates
  3. ^ a b "National Hydrography Dataset". United States Geological Survey. Retrieved December 23, 2010. ArcExplorer GIS data viewer.
  4. ^ a b "Watershed Boundary Dataset". USDA, NRCS, National Cartography and Geospatial Center. Retrieved December 23, 2010. ArcExplorer GIS data viewer.

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