16Water BudgetCompares the input (water you get) and output (water you use) of water in a specific region.
17Water Budget Controlled by many different climate factors Air temperatureHumidity (Season Extremes)Rainfall amountSoil Type
18A water budget has 4 parts: usage, recharge, surplus, and deficit Water Budget GraphsA comparison between Moisture supply (precip) and Moisture demand (evap)A water budget has 4 parts: usage, recharge, surplus, and deficit
19Water Budget GraphsUsage – When plants, humans, sun is taking water out of the system.Recharge - When the ground water is being filled back up
20Water Budget GraphsSurplus - Rainfall is greater than the need. Soil is moist.Deficit - Need for moisture is greater than the rainfall coming into the system. Soil is dry
27Water TableGround becomes saturated with water. This is the ground water that we have been talking about.Water Table – The top portion of the “zone of groundwater saturation”
28Water TableZone of Aeration – Water and air mixed with the rocks and soilCapillary fringe – Border between air/water and just water. Right above the water table (pg. 154)Zone of Saturation – Just water in the soil and no air
29Wells and SpringsOrdinary well - A hole dug or drilled down below the water table. ( water must be pumped out)Spring - Place where the water table is at the surface.Artesian well - A well that is pressurized. (water will not have to be pumped out)