GEOL 106 Lecture Notes - Lecture 30: Leachate, Pumice, Porosity

• School: Queen's University
• Department: Geological Sciences and Geological Engineering
• Course: GEOL 106
• Professor: John Hanes

Document Summary

Water can move underground and carry toxic chemicals (add diagram) You need to be able to determine where the potentially toxic leachate is going to go. The material must have empty spaces that are connected. Example: cracked rock: these materials are acting like a sponge. Pumice: has many empty spaces but they are not connected. Okay, let"s look at a simple situation: permeable sand sitting on impermeable rock. Water table: the boundary between the saturated and unsaturated zones. In our example, we find the water table by drilling a well. If water table is flat (i. e. horizontal), there is no lateral flow. If water table is not flat, water will flow laterally: moves from where water table is higher to where it is lower. Push up on one side of a table. Drill a bunch of wells and measure height of water table for each. Then, on a map draw lines of equal water-table height (you contour them)