

@mastersthesis {6293,
	title = {Seasonal fluctuations in nutrient dynamics and constructed wetlands in {Prado} {Basin}, {California}},
	year = {1996},
	note = {1378540},
	school = {California State University, Fullerton},
	type = {phdM.{S}.},
	address = {Ann Arbor},
	abstract = {The Santa Ana River has a groundwater recharge basin that contributes to the aquifers and supplies 65 percent of the drinking water used in Orange County. The Santa Ana River below Prado Dam, in Riverside County, contains increasing concentration of nitrates. In July 1993, the concentration of NO\${\textbackslash}sb3\$-N in the river was of 9.1 mg/l and it is projected to reach the drinking water quality standard of 10 mg/l in the near future, if no corrective measures are taken. Nitrates originate from historic agricultural overfertilization of crops, the dense dairy and feedlot operations in the area, as well as the treated municipal wastewaters discharged to the watercourses. This investigation evaluated the seasonal changes in dissolved inorganic nutrients at two stations for each of the three tributaries to the Santa Ana River as they enter the Prado Basin. The nutrient load was determined in each stream and was correlated with possible point and non-point nutrient sources. Chino Creek, between February and July 1993, contributed 4.6 percent of the total inorganic nitrogen (TIN) load and 8.1 percent of the total phosphate load leaving Prado Dam. Similarly, Mill Creek contributed 8.4 percent TIN and 15.7 percent PO\${\textbackslash}sb4,\$ and Temescal Wash 12.1 percent TIN and 20.3 percent PO\${\textbackslash}sb4.\$ Prado Basin, a natural sink for nutrients, was found to act as a mild nutrient source during the transitional spring months. Constructed wetlands, when used as a polishing component in the treatment process, can remove most of the dissolved nutrients applied, depending upon the loading and wetland hydraulic retention time. Constructed wetlands located downstream from dairy farms, feedlots, and treatment plant effluents are cost effective means of nutrient removal.},
	keywords = {0554:Sanitation, 0775:Environmental engineering, Applied sciences, Environmental engineering, sanitation},
	url = {http://search.proquest.com/docview/304355167?accountid=14270},
	author = {Vitko, Tadeo Giacomo}
}
