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Main Title Hydrologic Characterization of Forested Watersheds in Arizona.
Author Thoru, David B. ; Ffolliot, Peter F. ;
CORP Author Arizona Univ., Tucson.
Year Published 1971
Report Number DI-14-31-0001-3203; OWRR-A-014-ARIZ; 01702,; A-014-ARIZ(4)
Stock Number PB-204 646
Additional Subjects ( Snowmelt ; Forest lands) ; ( Forest lands ; Water supply) ; ( Watersheds ; Arizona) ; Surface water runoff ; Forest trees ; Density(Number/volume) ; Melting ; Mathematical prediction ; Pine trees ; Wood products ; Hydrology ; Water balance ; Inventories ; Management planning ; Precipitation(Meteorology) ; Pinus ponderosa
Library Call Number Additional Info Location Last
NTIS  PB-204 646 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
Abstract Inventory-prediction equations describing snowpack accumulations as functions of readily available or easily obtained measurements of forest density and land form were developed for use in Arizona ponderosa pine. To obtain data for the equations, measurements of the snowpack water equivalent were made with a Federal snow tube and scale at sample points to characterize (1) a winter accumulation-melt period, and (2) the peak accumulation, prior to spring runoff. Measurements of forest density were made at the same sample points and included basal area, sum of diameters, number of trees, bole area, and wood volume. Although empirical, the developed prediction equations included forest density measurements assumed to index the interception of input precipitation, obstruction of direct beam solar radiation, and radiation emission from trees onto the snowpack. Measurements of land form factors were included in the equations to index the quantity of direct beam solar radiation. These inventory-prediction equations should help land managers design forest management systems that will maximize the snowpack water equivalent at peak accumulation within constraints dictated by other management objectives such as timber production. (Author)
NTIS Title Notes Rept. for Jul 68-Jun 71.
PUB Date Free Form Oct 71,
Category Codes 4B; 8L; 2F; 8H; 64K; 52H; 64H
NTIS Prices PC A02/MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 326523285
Origin NTIS
Type CAT