Flooding is defined as the accumulation of water within a water body and the overflow of excess water onto adjacent floodplain lands. The flood- plain is the land adjoining the channel of a river stream, ocean, lake, or other watercourse or water body that is susceptible to flooding
Global Positioning System (GPS) GPS is a global positioning system that uses satellites to pinpoint your location anywhere on the planet. How does it do that? Your GPS-enabled device—such as a cell phone, car navigation system, or handheld GPS unit—determines your location by measuring the time delay between when a satellite sends a signal and when your unit receives it. With more than 24 GPS satellites in orbit around the Earth, GPS has become very popular for navigation on land, sea, and air, as well as an important tool for mapmaking and land surveying.