Scientific Investigations Report 2007–5005
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5005
A pond discharge calculator (PONDCALC) for the Alviso salt ponds (A2W, A3W, A7, A14, and A16) is presented in this report. Flap gates designed to allow only flow out of a pond complicate the hydraulics of flow through the discharge culverts. The conventional culvert flow equation contains an energy loss coefficient. Equations for this coefficient were determined empirically using measured water discharge and head at the pond A3W discharge structure. The resulting equations and several assumptions were used to develop PONDCALC, which is applicable only to the five Alviso salt ponds that discharged to South San Francisco Bay or to its connecting sloughs in 2005. The minimum error is estimated to be less than 20 percent for heads greater than 0.25 ft. During the period May through November, U.S. Fish and Wildlife Service must report discharges to the Regional Water- Quality Control Board: therefore, calculations are limited to this period. PONDCALC is available as a Microsoft Excel™ file.
U.S.
Department of the Interior | U.S. Geological Survey
Persistent URL: https://pubs.water.usgs.gov/sir20075005/
Page Contact Information: Publications Team
Page Last Modified: Thursday, 01-Dec-2016 19:46:05 EST
