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Effluent Nitrogen Management for Agricultural Re-Use Applications


 

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ITRC Report No.

P 07-003

 
 

Length

12 pages

 
 

Authors

Daniel Howes, Franklin Gaudi, and Donald Ton

 
 

Presented 

Irrigation Association 28th Annual International Irrigation Show.  San Diego, CA.  December 9, 2007.

 

 

 

Summary

 

Utilizing treated domestic wastewater to grow forage crops is becoming commonplace in regions that cannot release effluent into oceans or rivers.  A key concern when using disinfected secondary treated water is nitrogen percolating below the root zone and reaching the groundwater. A 2,000-acre wastewater reuse site with 27 center pivots in Palmdale, California is being utilized by the County Sanitation Districts of Los Angeles County to reuse approximately 8 to 9 million gallons per day of treated wastewater from the city of Palmdale. Through the development of a daily soil water/nitrogen balance model, combined with an overall cropping and monitoring strategy, the nitrogen deep percolation has been minimized throughout the reuse area to levels that are below Regional Board requirements.

 


 

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