Water Movement in Soil

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Long Term Acceptance Rate LTAR ‣ The biomat controls the ability of the soil to accept effluent: this is the LTAR ‣ Generally State codes dictate LTARs ‣ CONFUSION • On the relationship of LTAR & Ksat • Hold on we will get there • on the relationships between texture/structure Constance and the Perc rate
LTAR ‣ Texture/ Structure ‣ Other tests- Saturated conductivity Percolation rates Soil Characteristics and Soil Sizing Factor (> 3' separation) Percolation Rate Soil Sizing Factor minutes per inch Soil Texture square feet/ gallon (mpi) per day(sqft/ gpd) faster than 0.1* Coarse sand 0.83 0.1 to 5 Medium sand 0.83 Loamy sand 0.1 to 5** Fine sand 1.67 6 to 15 Sand y loam 1.27 16 to 30 Loam 1.67 31 to 45 Silt loam 2.00 Silt 46 to 60 Clay loam 2.20 Sandy clay Silty clay over 61 to 120*** Clay Sandy clay 4.20 Silty clay slower than 120**** *Use systems for rapidly permeable soils: pressure distribution or serial distribution with no trench >25% of the total system. **Soil having 50% or more fine sand plus very fine sand. ***A m ou n d m u st be u sed . ****An oth er or p erform an ce system m u st be u sed
Page 1 and 2: Water Movement in Soil James L. And
Page 3 and 4: CIDWT/University Disclaimer These m
Page 5 and 6: Water movement ‣ Why is this impo
Page 7 and 8: Hydrologic Cycle Precipitation ET S
Page 9 and 10: RAINFALL (48-54 Inches/Year) POTENT
Page 11 and 12: Precipitation Septic System Well In
Page 13 and 14: Water thru the Soil Treatment Area
Page 15 and 16: - + H-bond + - + - BONDS AND WATER
Page 17 and 18: Flow to the System ‣ Amounts •
Page 19 and 20: System geometry Infiltrative surfac
Page 21 and 22: Drainage Contour Lines Drainfield D
Page 23 and 24: Drainage Contour Lines DRAINFIELD D
Page 25 and 26: Flow pattern in sub-surface surface
Page 27 and 28: Saturated Conditions Pores are fill
Page 29 and 30: HYDROLOGY OF A SEPTIC SYSTEM Infilt
Page 31 and 32: Soil terms ‣ Soil Horizon ‣ Soi
Page 33 and 34: What is unsaturated flow • Matric
Page 35 and 36: Pore size & unsaturated flow ‣ La
Page 37 and 38: Capillary Fringe ‣ Unsaturated zo
Page 39 and 40: Flow pattern in a gravity trench
Page 41 and 42: Flow pattern in a gravity trench
Page 43 and 44: Pressure distribution
Page 45: Soil treatment area sizing ‣ Sewa
Page 49 and 50: Saturated soils contain free Free w
Page 51 and 52: Auger hole in soil is filled with a
Page 53 and 54: Water below water table has pressur
Page 55 and 56: Finding saturation in soils Identif
Page 57 and 58: Darcy’s law Flow (Q)/At = Ksat x
Page 59 and 60: Calculating Ksat ‣ In lab process
Page 61 and 62: Calculation of Q ‣ A = 1 ft 2 ‣
Page 63 and 64: Lateral movement Linear Loading Rat
Page 65: Bouma Study ‣ Biomat = LTAR ‣ B
Page 68 and 69: Putting it together Backfilled Soil
Page 70 and 71: Summary of Influences on System per
Page 72 and 73: Hydrologic cycle Precipitation Sept

Water Movement in Soil

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