What does constant level lake mean?

Related questions

1. What does Lake LBJ stand for?
2. What is the highest Lake Travis has been?
3. Is Lake Travis a man made lake?
4. Is Inks Lake constant level?
5. Why does Texas have a Colorado River?
6. Is Lake Travis full of water?
7. Is there 1 or 2 Colorado rivers?
8. Is Lake Travis full?
9. Where does the Llano River end up?
10. What rivers flow into Lake LBJ?

Tags

1. #levels
2. #lakes
3. #which
4. #conditions
5. #drought
6. #their
7. #fluctuate
8. #water
9. #times
10. #texas
11. #remains
12. #relatively
13. #significantly
14. #means
15. #constant
16. #level
17. #defined