Phreatic Surface Overview
A Phreatic Surface can be used to define Joint Water Pressure. Hydrostatic forces are applied to all block joint surfaces below the water table.
- The Groundwater Method must be set to Water Surface to consider a Phreatic Surface in the analysis computation. To learn more about the available Groundwater Methods, see the Joint Water Pressure topic.
- The water table should be defined across the entire horizontal extent of the slope. If the first or last coordinates do not correspond to the left and right edge of the model, the water table will be automatically extended horizontally as indicated by a dashed blue line on the left and/or right.
- For Toppling Analysis, the phreatic surface should be defined within the region of the toppling blocks. If you draw the phreatic surface above the slope, the maximum water level within the toppling joints will be assumed. RocSlope2 does not model submerged slopes and will not apply additional ponded water loading if the water table is drawn above the slope. Therefore, it is best to define the phreatic surface within the region of the toppling blocks.
- Only one phreatic surface can be defined for all three Analysis Methods.
- Various editing options are available after a surface has been added, see Edit Phreatic Surface for details.