Quick Answer: What Is An Example Of A Runoff?

What are the 2 types of runoff?

Runoff may be classified according to speed of appearance after rainfall or melting snow as direct runoff or base runoff, and according to source as surface runoff, storm interflow, or groundwater runoff.

2.

The sum of total discharges described in (1), above, during a specified period of time..

What is total runoff?

The total runoff is equal to the total precipitation less the losses caused by evapotranspiration (loss to the atmosphere from soil surfaces and plant leaves), storage (as in temporary ponds), and other such abstractions.

What are the components of runoff?

COMPONENTS OF RUNOFF:Direct rainfall over the stream:-Surface runoff or overland flow: –Subsurface flow or interflow:–Base flow, groundwater flow or Dry weather flow:-

What means annual runoff?

The average amount of water that flows down a particular river, per year, expressed either as a depth (in millimetres) of water spread evenly across the entire drainage basin, or as a volume (in cubic metres) of water flowing past a given point. From: mean annual runoff in A Dictionary of Environment and Conservation »

What are some examples of runoff?

Runoff from nonpoint sources includes lawn fertilizer, car exhaust, and even spilled gasoline from a car. Farms are a huge nonpoint source of runoff, as rainwater and irrigation drain fertilizers and pesticides into bodies of water. Impervious surfaces, or surfaces that can’t absorb water, increase runoff.

How would you describe runoff?

Runoff can be described as the part of the water cycle that flows over land as surface water instead of being absorbed into groundwater or evaporating. Runoff is that part of the precipitation, snow melt, or irrigation water that appears in uncontrolled surface streams, rivers, drains, or sewers.

How do you deal with runoff water?

Consider these affordable, do-able solutions to do just that.Add plants. Incorporate plantings, especially in areas where runoff collects. … Protect trees. Like other plant roots, tree roots help absorb and filter runoff. … Break up slabs. … Go permeable. … Catch runoff. … Dig a trench. … Plant a rain garden. … Cover soil.More items…

How does runoff affect a community?

Runoff from roofs, driveways, sheds, and other impervious surfaces flows to the storm drain and road ditches that flow directly into our anadromous streams and lakes. Runoff from such areas, especially roads, can contain pollutants from cars, fertilizers, and other chemicals found in the developed environment.

How do humans affect runoff?

Human activities can affect runoff In addition to increasing imperviousness, removal of vegetation and soil, grading the land surface, and constructing drainage networks increase runoff volumes and shorten runoff time into streams from rainfall and snowmelt.

Why is runoff a problem?

Runoff picks up fertilizer, oil, pesticides, dirt, bacteria and other pollutants as it makes its way through storm drains and ditches – untreated – to our streams, rivers, lakes and the ocean. … Reduce flooding – When heavy rain falls, the runoff that flows into the street can back up and cause street flooding.

What is another word for runoff?

In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for runoff, like: flow, groundwater, rainfall, surplus water, spring runoff, snowmelt, siltation, aquifer, ground-water, surface-water and streamflow.

What is the difference between runoff and discharge?

Thus, the terms discharge, streamflow, and runoff represent water with the solids dissolved in it and the sediment mixed with it. Of these terms, discharge is the most comprehensive. … The differentiation between runoff as a volume and streamflow as a rate is not accepted.

How do you find direct runoff?

Direct Runoff Formula For a given surface area such as a roof or yard, multiply the area by the inches of rainfall and divide by 231 to obtain the runoff in gallons. The factor 231 comes from the fact that the volume of 1 gallon equals 231 cubic inches.

What is a direct runoff hydrograph?

Direct runoff hydrograph resulting from a unit depth of excess rainfall occurring uniformly on a watershed at a constant rate for a specified duration.

What is an example of surface runoff?

Water will flow along channels as it moves into larger creeks, streams, and rivers. This picture gives a graphic example of how surface runoff (here flowing off a road) enters a small creek. The runoff in this case is flowing over bare soil and is depositing sediment into the river (not good for water quality).

What is direct runoff?

Water that flows over the ground surface directly into streams, rivers, or lakes. Also called storm runoff.

What is surface water?

Surface water is any body of water above ground, including streams, rivers, lakes, wetlands, reservoirs, and creeks. The ocean, despite being saltwater, is also considered surface water.

What is river runoff?

River runoff refers to all water that comes into a river water system from sources such as rainfall, snowmelt and groundwater.