- Arroyo de la Laguna
Geobox|River
name = Arroyo de la Laguna
native_name =
other_name =
category =stream
etymology = Spanish
nickname =
image_caption =
country = United States
state = California
region = Alameda County
district =
municipality =
parent =
tributary_left = Arroyo del Valle
tributary_right = Sinbad Creek
city = Pleasanton
landmark =
river =
source = confluence
source_location = Pleasanton
source_region = | source_country =
source_elevation_imperial = 315
source_lat_d = 37 | source_lat_m = 40 | source_lat_s = 36 | source_lat_NS = N
source_long_d = 121 | source_long_m = 54 | source_long_s = 44 | source_long_EW = W
source_coordinates_note =gnis|218389|Arroyo de la Laguna]
source1 =
source1_location = | source1_region = | source1_country =
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source1_long_d = | source1_long_m = | source1_long_s = | source1_long_EW =
source_confluence =
source_confluence_location = | source_confluence_region = | source_confluence_country =
source_confluence_elevation_imperial =
source_confluence_lat_d = | source_confluence_lat_m = | source_confluence_lat_s = | source_confluence_lat_NS =
source_confluence_long_d = | source_confluence_long_m = | source_confluence_long_s = | source_confluence_long_EW =
mouth = Alameda Creek
mouth_location = south ofSunol, California
mouth_region = | mouth_country =
mouth_elevation_imperial = 217
mouth_elevation_note =
mouth_lat_d = 37 | mouth_lat_m = 35 | mouth_lat_s = 18 | mouth_lat_NS = N
mouth_long_d = 121 | mouth_long_m = 53 | mouth_long_s = 27 | mouth_long_EW = W
mouth_coordinates_note =
length_imperial =
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width_imperial = | width_orientation =
depth_imperial =
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watershed_imperial =
discharge_imperial =
discharge_max_imperial =
discharge_min_imperial =
free = | free_type =
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website =
footnotes =Arroyo de la Laguna is a southward-flowing
stream inAlameda County, California ,USA which originates at the confluences ofSouth San Ramon Creek andArroyo Mocho . The Arroyo de la Laguna is fed by tributaries in theAmador Valley and certain eastern slope drainages of theDiablo Range ; these tributaries includeArroyo del Valle and Sinbad Creek. Arroyo del la Laguna discharges toAlameda Creek which in turn flows into theSan Francisco Bay .In prehistoric times much of the eastern part of the Amador Valley consisted of a lake known as
Tulare Lake . With development of the valley starting in the 1800s, drainage alterations in this watershed reduced the lake to a watercourse now called the Arroyo de la Laguna [ [http://www.museumca.org/creeks/133B03-OMALaguna.html Arroyo de la Laguna: Watershed Map and Profile] )]Hydrogeology
In the northern portion of the Arroyo de la Laguna catchment basin, the
Tassajara Formation underliesQuaternary valley fill material. [C.Michael Hogan and Marc Papineau, "Phase I Environmental Site Assessment, Vicinity of Deerwood Drive and Bollinger Canyon Road, San Ramon, Calironia", Earth Metrics Inc.File ref 7815, San Mateo, Ca. (1989)] Contacts of these two formations are often indistinguishable due to similarities of physical characteristics. The prism of sediments identified as valley fill materials contains from eight to ten separate zones of sand and gravel separated by zones of silt and clay.ee also
*
List of watercourses in the San Francisco Bay Area
*Mocho Subbasin
*Pleasanton Fault
*Tassajara Formation References
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