The Rock Physics Template to Estimate Clay Content, Porosity, and Vulnerability of River Levees

We propose to use the rock physics template to estimate clay content and porosity, and also introduce a new quantity that can be calculated from estimated clay content and porosity to represent vulnerability for the seepage failure of river levees. The rock physics template can be generated for a certain range of porosity and clay content by selecting appropriate rock physics models. This methodology provides clay content section, porosity section, and vulnerability sections from the integrated geophysical survey. We demonstrate the methodology to detect the most vulnerable location from the integrated geophysical investigations. The location identified as the most vulnerable point is verified by drilling and SPT. The location consists of very loose sand; therefore we concluded that the vulnerability section is beneficial to judge a priority of a treatment to stabilize the river levee.