| Description |
xii, 113 leaves : illustrations ; 29 cm |
| Summary |
"The moisture characteristic and unsaturated hydraulic conductivity of a Missouri plastic clay were investigated. The physical properties of the clay were determined by traditional soil mechanics tests. Test specimens were statically compacted at low water content. Thermocouple psychrometers were used to measure soil water potential (soil suction). Hysteresis in the moisture characteristic was investigated. A measurable distinction was observed between the primary wetting and primary drying curves. The unsaturated hydraulic conductivity was determined using a variation of the instantaneous profile method. Only imbibition was studied. The hydraulic conductivity at degrees of saturation from 45 percent to 83 percent was from three to four orders of magnitude lower than the hydraulic conductivity measured at full saturation. Parameters from the moisture characteristic of the clay were used in a published computer model (SOHYP) to predict the hydraulic conductivity-water content function. Values predicted by the model agreed with measured values within the middle portion of the range of water contents for which the hydraulic conductivity was determined. The model tended to underpredict at lower water contents and overpredicted at higher water contents"--Abstract, leaf iii. |
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