The mountains around come up more than 2,416 m over the lake level.

Around 10,000 years ago, the lake level dropped dramatically, probably to levels even lower than today.

The river must rise to lake level in the hills south of here.

Several efforts have been made to control lake levels in the last century.

The fall of the lake level since 1941 created a land bridge to the island.

Irrigation would cause a further drop in the lake level.

The lake level was much higher at the time the rock paintings were made.

An age of about 21,000 years ago has been found for this highest lake level.

The patio itself is about 60 feet above lake level.

This is reflected also by a fall in lake levels.