Wednesday, May 4, 2016

Liquid Earth

This is weird grass on a golf course. There are two layers underneath this grass. On the top, there is a layer of topsoil containing sand and slit. Underneath, there is a layer of clay made up of particles 1000 times small than a grain of sand. After a heavy rain, water can get through the top soil layer because of its larger particles and gaps in between them but when it reaches the clay layer it cannot. The clay layer is smaller and more dense so the water gets trapped at that level until it can't fill anymore. The rainwater is unable to penetrate the clay layer which is called waterlogging. This is what creates the liquid effect of the ground.