What is runoff in geography?

Surface runoff (also known as overland flow) is the flow of water that occurs when excess stormwater, meltwater, or other sources flows over the earth’s surface.

What are examples of runoff?

Runoff is defined as excess water draining away from land or buildings. The overflow of water that drains off of your driveway is an example of runoff. Dissolved chemicals, etc, included in such water. The runoff of nitrates is poisoning the lake.

What do you mean by runoff?

Runoff occurs when there is more water than land can absorb. The excess liquid flows across the surface of the land and into nearby creeks, streams, or ponds. Runoff also occurs naturally as soil is eroded and carried to various bodies of water.

What causes a runoff?

Runoff: Surface and Overland Water Runoff When rain falls onto the earth, it just doesn’t sit there, it starts moving according to the laws of gravity. A portion of the precipitation seeps into the ground to replenish Earth’s groundwater. Most of it flows downhill as runoff.

How is runoff calculated?

To calculate the runoff from any given rainfall:

  1. Take the dimensions of the footprint of your roof and convert them to inches. (So, a 50′ x 20′ roof is 600″ x 240″.)
  2. Multiply the roof dimensions by the number of inches of rainfall. (In this example, 600″ x 240″ x 1″ = 144,000 cubic inches of water.)

Is a Waterfall runoff?

Many people probably have an overly-simplified idea that precipitation falls on the land, flows overland (runoff), and runs into rivers, which then empty into the oceans. Water will flow along channels as it moves into larger creeks, streams, and rivers.

What is the effect of runoff?

Runoff is that part of the precipitation, snow melt, or irrigation water that appears in uncontrolled surface streams, rivers, drains, or sewers. Two of the main effects of runoff are erosion and pollution, both of which can have disastrous environmental consequences.

What is a polluted runoff?

Polluted Runoff, Nonpoint Source Pollution, U.S. EPA. Nonpoint source pollution is caused by rainfall or snowmelt moving over and through the ground. As the runoff moves, it picks up and carries pollutants into lakes, rivers, wetlands, coastal and ground waters.

Why is it important to reduce runoff?

Reducing runoff can help prevent water pollution, reduce flooding, and protect our precious drinking water resources.

What happens during a runoff?

Runoff voting can refer to: Two-round system, a voting system used to elect a single winner, whereby only two candidates from the first round continue to the second round, where one candidate will win. Instant-runoff voting, an electoral system whereby voters rank the candidates in order of preference.

How do you calculate runoff reduction?

In simple terms, runoff reduction or onsite retention is the total amount of water captured divided by the total potential runoff from the site. For example, a one-acre rooftop in a location with 45 inches of rainfall could generate up to 1.2 million gallons of runoff.

Are there any geography games you can play?

Put your geography knowledge to the test in these map-based games. Can you name all of the U.S. States, or solve a giant European jigsaw puzzle? Good luck guessing the names of all the countries in Asia!

What is the meaning of the word run?

Run ( s) or RUN may refer to: Run, in textiles, a progressive unravelling of pantyhose or tights. This disambiguation page lists articles associated with the title Run.

How to create a geography structure for a country?

Firstly, you need to create a geography structure for each country to define which geography types are part of the country structure, and how the geography types are hierarchically related within the country structure. For example, you can create geography types called State, City, and Postal Code.

Is the study of geography something you know?

Geography is something you do, not just something you know. Those who study geography identify relationships between these varied subjects, graft those relationships onto a geographic space, and explain why certain systems are where they are.