Portions of the Central Valley do not flow to the sea. Salt stays in a basin. To note, we were discussing land which emerged from the sea due to post-glacial re

Portions of the Central Valley do not flow to the sea. Salt stays in a basin. To note, we were discussing land which emerged from the sea due to post-glacial rebound, or where the sea was lowered through engineering effect, not basins. Nor is Carthage in a basin. Agricultural water runoff is a thing. The water doesn't all evaporate. Quoting http://www.watereducation.org/post/salinity-central-valley-critical-problem http://www.watereducation.org/post/salinity-central-valley-c... , "Every time a farmer irrigates a crop, salt ends up concentrating in the runoff and groundwater."