Water budgets lakes, calculation

Little Rock Lake. Net IAG in LRL takes place primarily in or near the sediment. It can be evaluated by measurements of pore-water chemistry, comparison of hypolimnetic and epilimnetic chemistry, and calculation of ion budgets. An example of each approach follows. 

Gas exchange studies of total toxaphene in Lakes Superior, Michigan and Ontario were conducted between 1996-2000 [46,50,67] using concurrently measured water and air concentrations. The air and water data from these studies are discussed in Sects. 2.2, 3.1.1 and 3.1.2, and are summarized in Tables 3, 5, and 6. An earlier mass budget for toxaphene [65] estimated gas exchange from measured water concentrations and historical air data from Hoff et al. [64], All studies based their fugacity and flux calculations on the temperature-dependent Henry s law constant for technical toxaphene [15]. 

---