Record Display for the EPA National Library Catalog

RECORD NUMBER: 43 OF 156

OLS Field Name OLS Field Data
Main Title Evaluation and Functional Operation of Irrigation Systems.
Author Bros, Delvin D. ; Wiersm, John L. ;
CORP Author South Dakota State Univ., Brookings.
Year Published 1971
Report Number DI-14-01-001-1862; OWRR-A-017-SDAK; 03532,; A-017-SDAK(1)
Stock Number PB-206 124
Additional Subjects ( Surface irrigation ; Evaluation) ; Evapotranspiration ; Water consumption ; Soil water ; Maintenance ; Corn ; Grasses ; Design ; Hydrology ; South Dakota ; Irrigation scheduling ; Cut-back furrow irrigation
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-206 124 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 41p
Abstract
A procedure was developed whereby irrigators could use weekly mean values of daily evapotranspiration to schedule irrigations and to determine the quantity of water to apply. The weekly mean values of daily evapotranspiration were calculated for corn and alfalfa crops in South Dakota on an area basis using the Jensen and Haise potential evapotranspiration equation. Daily soil moisture balance was estimated, using the calculated values, for irrigated fields on several farms by a water balance technique. The soil moisture balance estimates were compared against actual soil moisture balance measurements. The comparisons indicate that the calculated weekly mean values of daily evapotranspiration are reliable and reasonably accurate for soil moisture level estimation. (Author)