Topic 4) Soil Water Flashcards
Three forces of Capillary
Adhension EN Surfaces
Cohesion of water molecules
Gravitional
Soil Water Energy
High to Low
Kenetic
Potential Energy
Adhesion
Attraction of Water to soil surfaces
Provides a Matric Force
Hydration
Attraction to ions and other solutes
Provides an osmotic force
Gravity
Pulls water downward
provides a gravationtoal force
Componets of water Potential
Gravitional
Hydrostatic
Matric
Osmotic
Hydrostatic
the pressure is generated by the amount of water above
Matric Potential
The satuateed the less negative it becomes. The less water the more negative
Osmotic Potential
The more compounds found in that area the less likey it is move
Hystersis
Drying and Rewetting occur at different rates
Drying is faster then rewetting due to capillary attraction
Saturated Flows of water
When all pores are completley filled with water, water movement id dominated by gravational potential
Unsaturated Flows
Due to Matric potential of the soil
Infiltration Rate of soil
The rate of which soil enters the soil
Loamy sand > Silt loam > Expansive Clay
How do roots get access to water
Capillary movement of the soil water to the roots
Water Balence Equation
Prcipitation= (soil storage + Evapotranspriation + Discharge)
