The Surface at the Bottom of a Stream Etc

This page is the CodyCross answer for the clue below from World of Books, Group 285, Puzzle 3 (Interlibrary Loans).

Question is: The Surface at the Bottom of a Stream Etc

and the answer is: RIVERBED

Word Meaning:

RIVERBED — (hydrology) The path where a river runs, or where a river once ran; the bottom earthen part of a river, not including the riverbanks.

Definitions from Wiktionary.

The surface at the bottom of a stream etc — CodyCross Answer | CodyCross Solutions