sw4 - Overall Flow of Water in Soil 1. Water moves in...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Overall Flow of Water in Soil
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.Water moves in response to differences in total potential between two points. 2. Water always moves from high to low potential Total Potential Point A Point B 100 cm 1000 cm Movement of Water
Background image of page 2
Total potential energy at a point is the sum of gravitational, matric and submergence potentials Total Potential Point A Point B -45 cm -15 cm Ψm = -95 cm Ψg = 50 cm Ψm = -25 cm Ψg = 10 cm Movement of Water
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Differences in Total Energy Determine The Direction of Water Flow in Soil The overall driving force for water movement also depends on the distance between the points The Gradient accounts for both the difference in potential and the distance between the points
Background image of page 4
The Gradient Gradient = difference in total potential distance between points
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Point A Point B Ψ T = 50 cm Ψ T = 10 cm Distance between points = 10 cm Gradient = 40 cm = 4 10 cm Point A Point B Ψ T = 50 cm Ψ T = 10 cm Distance between points = 20 cm Gradient = 40 cm = 2 20 cm
Background image of page 6
The gradient indicates the direction and overall driving force for water movement The rate of water movement is indicated by The Hydraulic Conductivity
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The Hydraulic Conductivity The ease with which water moves through soils Determines the rate of water movement Texture Density Structure Water content
Background image of page 8
Texture Density Structure Water content Texture – small particles = small pores = poor conductivity Density – high density suggests low porosity and small pores Structure – inter-aggregate macropores improve conductivity
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/04/2011 for the course SWS 3022 taught by Professor Bonczek during the Spring '11 term at University of Florida.

Page1 / 36

sw4 - Overall Flow of Water in Soil 1. Water moves in...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online