Lake evaporate average isotopic composition

In this expression, all of the terms except the isotopic composition of the lake evaporate (8 ) are directly measurable. The average isotopic composition... [Pg.84]

The monthly isotopic composition (8lsO) of lake evaporate from Sparkling Lake was estimated by use of eq 12. Monthly evaporation rate estimates were then used to calculate the weighted average annual 8lsO of lake evaporate, — 16.9%,. [Pg.86]

As discussed previously, the isotopic composition of evaporating water bodies on plots of 8lsO versus 8D lie on evaporation lines. The intersection of any evaporation line with the LMWL corresponds to the average composition of water entering the lake. Geographically clustered lakes that meet the requirement of being at isotopic steady state should plot along the same... [Pg.87]

In the simplest case, groundwater-flow rates for lakes at isotopic steady state (or those with relatively long hydraulic-residence times) can be estimated from data on average annual precipitation rates average annual evaporation rates the isotopic compositions of precipitation, lake water, and inflowing ground-water and relative humidity and lake temperature. [Pg.94]