Lec12 - University of California, Berkeley Civil...

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University of California, Berkeley Professor Ken Johnson Civil Engineering 70 Engineering Geology Civil Engineering 70 Lecture 12 10/4/07 Ground Water o Water Flux o Rain Shadow o Water Table o Perched, confined, unconfined o Hydrothermal GW o Well Hydraulics Basics o Karst Terrain/Sinkholes Slope Stability o Cut and Fill Used to build houses on hills IT’s great because you reuse everything you dig up to fill up o Trees Provide stability for a hill Absorb water Roots give the hill tensional strength Correlation of fires and landslides When fires kill at the trees, the roots die in a year or so Landslides occur within a year of major fires o Terracing hills mitigate landslides by creating flat places for the rock to fall to rather than all the way down in which case a small slide can become huge Water o 95.96% of water is salt water o Freshwater – 4.04% 2.97% in Glaciers and Polar Ice 1.05% in Underground Waters 0.009% lakes and rivers
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Lec12 - University of California, Berkeley Civil...

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