BIO-ENGINEERING ASPECTS OF AGRICULTURAL DRAINAGE 

 SAN JOAQUIN VALLEY, CALIFORNIA 



The Bio-Engineering Aspects of Agricultural Drainage 

 reports describe the results of a unique interagency study 

 of the occurrence of nitrogen and nitrogen removal treat- 

 ment of subsurface agriciiltural wastewaters of the San 

 Joaquin Valley, California. 



The three principal agencies involved in the study are 

 the Water Quality Office of the Environmental Protection 

 Agency, the United States Bureau of Reclamation, and the 

 California Department of Water Resources. 



Inquiries pertaining to the Bio-Engineering Aspects of 

 Agricultural Drainage reports should be directed to the 

 author agency, but may be directed to any one of the three 

 principal agencies. 



THE REPORTS 



It is planned that a series of twelve reports will be 

 issued describing the results of the interagency study. 



There will be a summary report covering all phases of 

 the stiidy. 



A group of four reports will be prepared on the phase of 

 the study related to predictions of subsurface agricul- 

 tural wastewater quality — one report by each of the 

 three agencies, and a summary of the three reports. 



Another group of fovar reports will be prepared on the 

 treatment methods studied and on the biostimulatory 

 testing of the treatment plant effluent. There will be 

 three basic reports and a summary of the three reports. 

 This report, "NUTRIENTS FROM TILE DRAIN SYSTEMS", is one 

 of the three basic reports of this gro\ip. 



The other three planned reports will cover (1) techniques 

 to reduce nitrogen dxiring transport or storage, (2) possi- 

 bilities for reducing nitrogen on the farm, and 

 (3) desalination of subsurface agricultural wastewaters. 



