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STABLE ISOTOPES OF OXYGEN AND HYDROGEN IN THE TRUCKEE RIVER PYRAMID LAKE SURFACE-WATER SYSTEM .2. A PREDICTIVE MODEL OF DELTA-O-18 AND DELTA-H-2 IN PYRAMID LAKE

Publication Type:

Journal Article

Source:

LIMNOLOGY AND OCEANOGRAPHY, Volume 39, Issue 2, p.356-364 (1994)

Abstract:

A physically based model of variations in deltaO-18 and deltaH-2 in Pyramid Lake is presented. For inputs, the model uses measurements of liquid water inflows and outflows and their associated isotopic compositions and a set of meteorological data (radiative fluxes, air temperature, relative humidity, and windspeed). The model simulates change of lake volume, thermal and isotopic stratification, evaporation, and the isotopic composition of evaporation. A validation of the model for 1987-1989 and 1991 indicates that it can reproduce measured intra- and interannual variations of deltaO-18 and deltaH-2. Three applications of the model demonstrate its ability to simulate longer term responses of deltaO-18 to change in the hydrologic balance and hydrologic characteristics (opening and closing) of the lake.