Point and Nonpoint Pollution
Non point pollution is from land runoff, precipitation, seepage, drainage, and deposition. Non point pollution is when people basically throw toxics and chemicals in the rivers, streams, and lakes next to them and then it goes down to more people downstream and pollutes them with the trash. Point pollution is pollution that comes from a single source, such as factories or wastewater treatments plant. They don't completely pollute the water but sometimes.
Water Shed
A water shed is something that comes in all shapes and sizes.They cross,states,nations boundaries.A watershed is a basin-like landform defined by highpoints and ridgeline's that descend into lower elevations and streams valleys.A watershed carries water "shed from the land after rain falls and snow melts.Drop by drop water is channeled into soils groundwater creeks and streams,making its way to larger rivers and eventually the sea.Water is a universal solvent affected by all that it comes in contact with the land it traverses and the soils through which it travels.The important thing about watershed is what we do on the land affected water quality for all communities living down streams.