Evaporation from the lake removes pure water molecules off the lake's surface and relatively
impure water is left behind.
It only makes sense to reduce accumulated salts of potassium, sodium, aluminum and nitrogen by pumping from the lake. To draw well water from acquifers, their relatively pure status is compromised, if not run dry. (!)
Being heavier than water molecules, why doesn't Lakeport draw contaminated lakewater from the nearest/deepest parts of the lake rather than drain off relatively pure water off the surface?
"Contaminated", i.e., salts from soft-water treatment installations, lawn fertilizers, construction sites, razed woodlands, humans, wildlife, and roadway salt.
What is the status of the spillway at Lakeport, anyway?