Most of the river runoff (about 70% or 515 km/year) is contributed by the Lena River.

The sea level is maximal in summer, due to the river runoff, and in autumn due to the winds.

Ground water and river runoffs are being negatively impacted as well.

The distribution of river runoff across the Earth's surface is very uneven.

Flooding has been a larger concern today due to rapid development in the river catchment area which increase the river runoff and decreasing the river capacity.

The material, he said, comes from several sources: New York City's sewers; boaters discarding trash, and river runoff.

The major source of salt is river runoff.

The freshwater represents about 10% of all freshwater in the Arctic; it comes mostly from Russian river runoff.

Similar slight overall increase in global river runoff and in average soil moisture has been perceived.

These factors include river runoff, higher cooling and heating rates, continental air masses, near-shore ocean currents, and upwelling effects.