However, a dam built for hydroelectric power has considerably reduced its flow.

The dams and other works reduce the intensity of spring run-off.

The dam has reduced the river's natural ability to purify itself and tends to concentrate contaminants.

It has been claimed that the dam reduced ice-jam floods, but the recent studies are not able to verify this claim.

The dams prevent or reduce the frequency of these flooding events.

The dam reduces energy dependence on Chinese sources.

The dam reduced the amount of silt and water coming down from the waterfall into the gorge by 90 percent.

Jordan has little water, and dams in Syria have reduced its available water sources over the years.

If constructed this dam would further reduce the intensity of the annual flood.

In addition to hindering their migration, dams reduce flow.