Modeling Vegetation (and other) Effects using VOLFLO Software

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To model special non-climate controlled conditions you have to determine: 1. Shape of suction profile for non-climate controlled co t o ed co conditions d t o s 2. Which suction profile (initial or final) will b be affected ff t d 38
4.5 pF is considered the wilting point of most vegetation. For the root zone, it is assumed that the t tree will ill dry d out t the th soil il to t a suction of 4.5 pF. The depth of soil affected by trees is commonly assumed to be 2 feet deeper than the deepest root root. Below the depth influenced by the tree, the suction profile will trend back to the equilibrium suction value. 39
Page 1: June 10, 2009 - Houston, TX
Page 4 and 5: Percent Volume Change Per Element S
Page 6 and 7: Suction Compression Index corrected
Page 8 and 9: A suction change from dry (higher s
Page 11: Consolidation Theory Shrink / Swell
Page 14 and 15: PTI adopted adopted the principles
Page 17 and 18: PTI PTI’s s Differential Soil Mov
Page 19 and 20: y m is (and always has been) develo
Page 21 and 22: ym, in very simple l terms, is a fu
Page 23 and 24: Initial Suction Profile Measured Su
Page 27 and 28: Post-Equilibrium Suction Envelope -
Page 29 and 30: Shrink Case - Both envelopes start
Page 31 and 32: When to use Post-Equilibrium Envelo
Page 33 and 34: The magnitude of shrink and swell i
Page 35 and 36: 1.1 pF + 0.4 pF = 1.5 pF (Total Suc
Page 40 and 41: Since the tree is removed JUST BEFO
Page 43 and 44: After the tree has been removed the
Page 45 and 46: The magnitude of swell is a functio
Page 47 and 48: 3 large trees reportedly removed wi
Page 49 and 50: Reduuction of Suction S Chaange 100
Page 51 and 52: Time = 0 Time = 1 Year 51
Page 53: Time between tree removal and found
Page 56 and 57: Due to climate influences alone aft
Page 58: Shrinking Swelling 58
Page 61 and 62: …. it would be the final suction
Page 63 and 64: Note: This is used primarily for an
Page 66 and 67: Excessive watering of a flowerbed c
Page 68 and 69: For post-equilibrium post equilibri
Page 71 and 72: A vertical moisture barrier will li
Page 73 and 74: Suction profile for climate control

Modeling Vegetation (and other) Effects using VOLFLO Software

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