Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Analog Computers for Forest Hydrology Research.
Author Wooldridg, David W. ; Fox, J, John D. ;
CORP Author Washington Univ., Seattle. Inst. of Forest Products.
Year Published 1970
Report Number DI-14-31-0001-3048; OWRR-A-037-WASH; 01411,; A-037-WASH(1)
Stock Number PB-195 783
Additional Subjects ( Hydrology ; Analog simulation) ; ( Forest land ; Hydrology) ; Mathematical models ; Flood routing ; Data processing ; Water supply ; Earth hydrosphere ; Computerized simulation ; Forestry ; Forest hydrology
Library Call Number Additional Info Location Last
NTIS  PB-195 783 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 42p
The report concentrates on (1) describing mathematically soil-plant-atmosphere systems in terms of water balance and continuity of mass equations and (2) working with analog computer theory and programming techniques for modeling above relations. The investigation suggests many possible applications in forest hydrology as well as applied and basic hydrology. General principles and methods of analog computer simulation are discussed. Examples of hydrologic models are presented, including surface flood runoff, a model for vertical transport processes from the forest cover to the soil system and a program for modeling one-dimensional soil-water flow with time. The models illustrate the capability and potential of analog simulation in forest hydrology. Verification was not attempted due to insufficient input data and the difficulty of converting discrete digital input data into analog input signals. Limitations and advantages of digital and analog simulations are discussed. (Wooldridge-Wash)