Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Irrigation management affecting quality and quantity of return flow /
Author Willardson, Lyman S.
Other Authors
Author Title of a Work
Hanks, R. John.
CORP Author Utah State Univ., Logan.;Robert S. Kerr Environmental Research Lab., Ada, Okla. Source Management Branch.
Publisher Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Enivironmental Protection Agency ; available through the National Technical Information Service,
Year Published 1976
Report Number EPA-600/2-76-226; EPA-R-802864
Stock Number PB-265 591
OCLC Number 02944541
Subjects Irrigation--Management. ; Irrigation water.
Additional Subjects Irrigation ; Salinity ; Water quality management ; Leaching ; Soil properties ; Plants(Botany) ; Mathematical models ; Predictions ; Inorganic salts ; Subsurface drainage ; Evapotranspiration ; Field tests ; Computerized simulation ; Utah ; Return flow
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-76-226 Headquarters Library/Washington,DC 01/11/2011
EJBD  EPA 600-2-76-226 c.1 Headquarters Library/Washington,DC 12/27/2013
EKAM  TC812.W54 Region 4 Library/Atlanta,GA 08/27/1999
EMBD  EPA/600/2-76/226 NRMRL/GWERD Library/Ada,OK 02/03/1995
ESAD  EPA 600-2-76-226 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-265 591 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation xvi, 191 p. : ill. ; 28 cm.
Management practices for control of quality and quantity of return subsurface flow were studied theoretically, in the laboratory, and full scale in the field. Field water management studies using waters of different qualities and different leaching fractions showed that the soil in the project area has a high salt buffering capacity. The soil acted either as a source or a sink for salt depending on the leaching fraction and the quality of water used for irrigation. Minimum average leaching fractions attainable on a field scale were found to be controlled by the uniformity of irrigation water application. Digital computer models were developed that consider properties of the soil, plant, water and environment. One model allows prediction of salt buildup and the yield response over several years. Salt buildup in the soil eventually caused a yield decrease. It was necessary to include a source-sink term in a salt flow model to accurately simulate field data. Source-sink phenomema observed in the field were confirmed by leaching tests conducted in the laboratory. Both models are potentially useful for salt management in the field.
"Grant no. R-802864." Bibliography: p. 146-147.