Grd 12 - Important concepts - drainage systems! Crossword

Area drained by a river system or stream network (2)
The area over which rain falls and is caught by a drainage basin (2)
A main river with all its tributaries (2)
An area of high ground separating two drainage basins.
A river that joins another larger river
Sea or lake where the river ends (2)
Where the river begins
The place where two rivers join
The upper level of underground saturated rock (2)
The surface flow of water (2)
Water found under the ground
High-lying area or spurs between two river valleys
Movement of water through soil into the ground