Accession Number : AD0433026

Title :   SURFACE ENERGY BALANCE IN ARID LANDS AGRICULTURE, 1960-61,

Corporate Author : AGRICULTURAL RESEARCH SERVICE TEMPE ARIZ WATER CONSERVATION LAB

Personal Author(s) : VAN Bavel,C. H. M. ; Fritschen,L. J. ; Reginato,R. J.

Report Date : DEC 1963

Pagination or Media Count : 50

Abstract : This report discusses methods and preliminary results of a study of the disposition of radiant energy over bare land that is wetted or ponded in an arid, hot climate. Evaporative flux at the surface is evaluated from a triplicate precision weighing lysimeter installation. Other methods are conventional: (1) comparison of small with large evaporating surfaces show relatively small advective effects at the surface; (2) over large, wet areas, daily balances show, as a rule, no net extraction of heat from the air; and (3) heat flow into the air is extremely variable during the day, depending on the nature of surface and wind conditions. More detailed analysis of the data are planned as well as continued studies involving surfaces with a vegetative cover. (Author)

Descriptors :   (*SOILS), (*AGRICULTURE, TERRAIN), (*EVAPORATION), SURFACE PROPERTIES, ECOLOGY, EXPERIMENTAL DATA, TEST METHODS, SURFACE TEMPERATURE, TABLES(DATA), AIR, WATER

Distribution Statement : APPROVED FOR PUBLIC RELEASE