A drain tile system creates a perfect pathway ... shovel in a bottom layer of 1-1/2-in. to 2-in. washed river rock (a layer of smaller rock can become clogged with minerals and sediments).

Para leer esta historia en español, haga clic aquí. For thousands of years, the glaciers that crown the Cordillera Blanca ...

See it →Desert creature covered in ‘large’ spikes found hiding under rock. It’s a new species ... in the Brahmaputra River drainage, researchers said. People in the region have “long ...

A new study in Chile shows how small differences in rock type can drive large differences in erosion, vegetation, and river networks, illuminating the role of mineralogy in shaping landscapes.

Percolation - The downward movement of water from the soil into the rock beneath. Drainage basin - the area of land drained by a river. Channel - the bed and banks that form the route of the river.