However, low water levels alone did not cause these blooms.

In summer, low water levels can cause the ferry to bottom out.

Officials said the lower water level only made the spill's effect worse.

At low water levels, the old road and bridge become visible.

During summer, low water levels cut off gene flow between these two.

Other species of native fish have also been affected by the low water levels.

In a further four to five months per year, the load had to be reduced even earlier due to the low water level.

In the winter, lower water levels expose the eggs for five months.

Despite high or low water levels, flocks of people line the lake to fish each summer.

The report says that 40 British rivers are suffering from low water levels as a result of human action.

With lower water levels the generation of electricity is decreasing.

Normally, summer is a time for low water levels.

It is found from low water level to a depth of about forty metres.

Authorities are blaming this on the lowest water levels in 50 years.

Both mill operators were troubled by low water levels, especially in late summer.

At low water levels the old portals of the tunnel can still be seen.

Lower water levels at this time of year mean fewer mosquitos.

During low water levels mudflats get exposed in the lake.

The cause of the incident was attributed to exceptionally low water levels.

For example, lower water levels can contribute to higher concentrations of natural and human pollutants.

At low water levels, this rock is visible in the Elbe.

In the lowered position, the vertical clearance is less than five feet above the low water level.

However, low water levels in drought years have stressed the lake's ecology.

The low water level has also led to a decline in hydroelectric output.

Low water level uncovers the core, allowing it to heat up.