Score Four Crossword

A region draining into another body of water (river)
a large natural stream of fresh water flowing into the sea
a flow of water in a channel or bed ( brook, small river)
physical materials such as grass, asphalt, trees, bare ground, water, etc
incapable of being penetrated (water)
good water quality supporting aquatic organisms
GIS (geographic information system) data and/or imagery that form the background setting for a map.
able to penetrate (water)
pollution created from many sources
pollution created by a single source
surface water in abnormal quantity resulting from heavy falls of rain or snow
the draining away of water (or substances carried in it) from the surface of an area of land, a building or structure, etc.
a vertical pipe for carrying rainwater down from a roof gutter
garbage from households, schools, offices, market places, restaurants and other public places
the number and variety of species found within a specified geographic region