Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Influence of Low Rates of Water Application by Sprinklers on the Microclimate.
Author Wiersm, John L. ;
CORP Author South Dakota State Univ., Brookings. Dept. of Agricultural Engineering.
Year Published 1970
Report Number DI-14-01-0001-711; OWRR-A-006-S.DAK.; 03925,; A-006-S.DAK(1)
Stock Number PB-197 112
Additional Subjects ( Sprinkler irrigation ; Design) ; ( Water loss ; Measurement) ; Evaporation ; Humidity ; Atmospheric physics ; Temperature ; Wind velocity ; Grasses ; Evapotranspiration ; Spraying ; Efficiency ; Maintenance ; Cost analysis ; Microclimatology ; Low rate sprinkler irrigation
Library Call Number Additional Info Location Last
NTIS  PB-197 112 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 102p
An analysis was made of water losses due to evaporation within the wetted area of a low application rate sprinkler system operating during daylight hours under conditions of slight to moderate breezes. The magnitude of evaporation loss from the sprinkled area was determined by measuring the absolute humidity, temperature, and wind speed profiles immediately upwind and downwind from a large bromus grass field where near-horizontal homogeneity existed prior to operation of the sprinkler. Sprinkler discharge rate and operating pressure had minimal effect on water loss. The losses were mainly evaporation from plant surfaces, and were as high as one-half of the sprinkler water discharge. The greatest decrease in evapotranspiration was adjacent to the wetted area. A field 70 meters downwind from the sprinkler line was unaffected. Approximately one-eighth of the water that evaporated within the sprinkled area was offset by a decrease in evapotranspiration in the first 70 meters downwind. (WRSIC abstract)