A water catchment area is land that is bounded by natural features such as hills or mountains, from which all surface water, run-off water and groundwater...
A water catchment is an area of land and the water that collects and moves through it. A catchment is often bordered by hills or mountains....
In science, a model is a representation of an idea, an object, a process or a system. Models are often used when it is difficult to...
See our newsletters here.
