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California Water Science Center - Santa Ana Basin, National Water Quality Assessment Program

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Santa Ana River below Prado Dam (11074000), BFS, BST, ECO

This former NASQAN station (1974-1994) is below the Prado Flood Control Reservoir, and therefore is an integrator in space and time for the Inland Santa Ana Basin. Water quality at the site is affected by a number of factors including the import of relatively high-salinity water into the Basin, discharge of treated wastewater into the Santa Ana and its tributaries, and runoff from urban and agricultural land uses (including dairies). Water quality at the site is also affected by the impoundment and wetlands above the dam.

The drainage area is 1,490 square miles at an elevation of 450 feet above sea level. The USGS has operated the site as a continuous record gaging station since April 1930, for operation during irrigation seasons; and since January 1940, for operation all year. Probes for continuous monitoring of specific conductance and water temperature are installed. A cellular telephone is present and connected to the data logger via a modem in order to provide remote access for all parameters.

This site is also a trend site sampled 8 times per year. Aquatic ecology is collected yearly.

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Santa Ana River below Prado Dam at the USGS gage.
Santa Ana River below Prado Dam at the USGS gage.
picture
Santa Ana River downstream from the USGS gage below Prado Dam.
Santa Ana River downstream from
the USGS gage below Prado Dam.
Santa Ana River looking downstream from the USGS gage.
Santa Ana River looking downstream from
the USGS gage.
(Photos by Carmen Burton, USGS)

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URL: http://ca.water.usgs.gov /projects/sana_nawqa/sw_sar_prado.html
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Page Last Modified: Friday, 23-Dec-2016 13:44:49 EST