Laserfiche WebLink
<br />002798 <br /> <br />urbanized, even major features may not be visible. Furthermore, landslide <br />features change over time on an active slide. Field reconnaissance is <br />necessary to verify or detect many landslide features. <br /> <br />Geophysical Studies <br /> <br />Geophysics can be used to determine <br />to bedrock and zones of saturation. <br />of dri 11 ing. <br /> <br />some subsurface features such as the depth <br />In some instances it can be used in lieu <br /> <br />Drilling <br /> <br />In most cases, drilling is necessary to determine the depth to the slip plane, <br />and thus the thickness of the slide mass; the water table level; the amount of <br />disruption of the slide materials; and sample for age-dating and engineering <br />properties of slide materials. <br /> <br />Computerized Landslide Terrain Analysis <br /> <br />In recent years computer modeling of landslide masses has been used to <br />determine the slide mass volume and the change in topographic expression and <br />cross section over time. This information is useful in calculating potential <br />stream blockage, cost of slide removal; and type and mechanism of movement. <br /> <br />Landslide Hazard Prediction <br /> <br />(In Preparation) <br /> <br />- 12 - <br />