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  2. Rankine theory - Wikipedia

    en.wikipedia.org/wiki/Rankine_theory

    Rankine's theory (maximum-normal stress theory), developed in 1857 by William John Macquorn Rankine, [1] is a stress field solution that predicts active and passive earth pressure. It assumes that the soil is cohesionless, the wall is frictionless, the soil-wall interface is vertical, the failure surface on which the soil moves is planar , and ...

  3. Principal aquifers of California - Wikipedia

    en.wikipedia.org/wiki/Principal_aquifers_of...

    California aquifers, excerpted from map in Ground Water Atlas of the United States (USGS, 2000): Lavender is "other" for "rocks that generally yield less than 10 gal/min to wells"; dark green-blue (3) are the California coastal basin aquifers, bright-turquoise blue (7) is the Central Valley aquifer system, flat cobalt-blue (1) down south is Basin and Range aquifers

  4. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    The pH is measured in soil-water (1:1) and soil-salt (1:2 ) solutions. For convenience, the pH is initially measured in water and then measured in CaCl 2 {\displaystyle {\ce {CaCl2}}} . With the addition of an equal volume of 0.02 M CaCl 2 {\displaystyle {\ce {CaCl2}}} to the soil suspension that was prepared for the water pH, the final soil ...

  5. List of largest reservoirs of California - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_reservoirs...

    This is a list of the largest reservoirs, or man-made lakes, in the U.S. state of California. All fifty-three reservoirs that contain over 100,000 acre-feet (0.12 km 3) of water at maximum capacity are listed. This includes those formed by raising the level of natural lakes, such as at Lake Tahoe.

  6. Water in California - Wikipedia

    en.wikipedia.org/wiki/Water_in_California

    Other common crop water use, if using all irrigated water: fruits and nuts with 34% of water use and 45% of revenue, field crops with 14% of water and 4% of revenue, pasture forage with 11% of water use and 1% of revenue, rice with 8% of water use and 2% of revenue (despite its lack of water, California grows nearly 5 billion pounds (2.3 ...

  7. Central Valley Project - Wikipedia

    en.wikipedia.org/wiki/Central_Valley_Project

    The California Water Plan is the state's official water policy with the latest version completed in 2013; Water in California Summarizes the history and details of the state's water policy issues. California's Irrigation district's 92 public self-governing subdivisions [613] of the State that purchase water from the CVP; Central Valley Ag - CVA

  8. Southern California Coastal water resource subregion

    en.wikipedia.org/wiki/Southern_California...

    The Southern California coastal subregion, sometimes called the South Coast Hydrologic Subregion, is a second-level subdivision [1] covering is approximately 11,000 sq mi (28,000 km 2; 7,000,000-acre) and extends from Rincon Creek on the north to the international border with Mexico on the south. [2]

  9. San Joaquin (soil) - Wikipedia

    en.wikipedia.org/wiki/San_Joaquin_(soil)

    San Joaquin soil profile San Joaquin soil landscape. San Joaquin is an officially designated state insignia, the state soil of the U.S. state of California.. The California Central Valley has more than 500,000 acres (2,000 km 2) of San Joaquin soils, named for the south end of that valley.

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