Arroyo de la Laguna

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 =
source1_elevation_imperial =
source1_lat_d = | source1_lat_m = | source1_lat_s = | source1_lat_NS =
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 of Sunol, 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 =
length_orientation =
width_imperial = | width_orientation =
depth_imperial =
volume_imperial =
watershed_imperial =
discharge_imperial =
discharge_max_imperial =
discharge_min_imperial =
free = | free_type =


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Arroyo de la Laguna is a southward-flowing stream in Alameda County, California, USA which originates at the confluences of South San Ramon Creek and Arroyo Mocho. The Arroyo de la Laguna is fed by tributaries in the Amador Valley and certain eastern slope drainages of the Diablo Range; these tributaries include Arroyo del Valle and Sinbad Creek. Arroyo del la Laguna discharges to Alameda Creek which in turn flows into the San 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 underlies Quaternary 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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