Diegos San Watershed and and Examination of Land Cover in Relation to Pollution
Tamera Ashcraft 30 November 2000
Outline
Background on the San Diego River, Mission Bay and San Diego Bay Contamination and Habitat Destruction in the Bays The San Diego Watershed Urbanization of San Diego Summary
San Diego River History
The San Diego River originally flowed into San Diego Bay Attempt to divert it in 1853 by the Army Corps of Engineers failed Another attempt in 1875 successful SD river drains 440 sq. miles
San Diego History
1870s - San Diego population was 2300 Population in 1900 was 18,000 The population doubled from 250,000 in 1940 to 500,000 in 1948 Sea World built In 1940 plan to fill in the marshes on the south side of Mission Bay to make an airport
Mission Bay
Mission Bay drains approx 53 sq. miles Mission Bay water quality problems from bacterial contamination and from urban runoff High nutrient load High heavy metal content Implementing plans to limit non-point source pollution
San Diego Bay
415 sq. miles watershed drainage SD Bay has been contaminated by the power plant cooling, dammed tributaries, urban runoff, heavy metals from ships, and from a salt production plant
Area of Study
An area of Southern California An area of increasing population growth An area where rare habitats Salt Marsh and Torrey Pines - are being threatened by urbanization and dredging
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Sa n D i e
San go Diego River
This is the San Diego area Highlighted is the San Diego River It flows through a reservoir, a dam, and finally into Mission Bay
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San Diego
San Diego Watershed
of the San Diego River watershed is used for urban or agricultural purposes The San Diego River deposits bacteria- and nutrient-rich water into the Bay
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San Diego
Urban San Diego County
This is the portion of San Diego County that is Urban The salt marsh habitats have been nearly eliminated Salt marsh is important for cleansing the water and as habitat for marine invertebrates and juvenile fish San Diego Bay and Mission Bay have been damaged by dredging and habitat destruction
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San Diego
Land Use/Land Cover
This is Land Use/ Land Cover Data for the San Diego Bay and Mission Bay areas The Urban area is highlighted in blue (all of the area is...