reservoir vs flux

% evaporated from ocean returns to ocean

hydrologic cycle

how much evaporated water from land returns to land

how much water on earth is in the ocean

major sources of freshwater

water usage in world

how much irrigation water do NC used per day vs california

which countries use over 75% of their sustainable water

top of groundwater

how is groundwater replenished

how much groundwater extracted in US/person

how is groundwater found in earth

where are streams and lakes replenished in humid areas

climate change impact on groundwater

RCP 6.0 rainfall change

circulation cell diagram

palmer drought severity index

which 2 states had severe or extreme drought for more than 20% of 1895-1995

when was dustbowl palmer index in kansas and nebraska

permafrost

where in us most permafrost

name of 3 layrs of soil containing permafrost

organic soil in permafrost vs world