effective rainfall

effective rainfall

[ə¦fek·tiv ′rān‚fȯl]
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The effective rainfall was estimated by the methodology of the Soil Conservation Service of the United States (USDA), available in the software Cropwat v.
Only precipitation events larger than 10 mm were considered as effective rainfall events (Moret and Arrue 2007).
Water inputs to the root zone include effective rainfall (the fraction of total rain that infiltrates the soil after losses to leaf interception, surface runoff and depression storage, and evaporation) and irrigation (vineyard only).
The effective rainfall is the portion of total rainfall that is useful for crop production.
Furthermore, it can also be found to what extent irrigation and drainage water is needed as it can be computed from the relation between the available water of effective rainfall and water necessity for the crops [12].
If i(o) is the effective rainfall, the response of a complete input i(o) is the direct runoff Q(t) of the catchment.
The time for the most effective rainfall to occur was just about past when I was there, and while some rain had fallen in the major cities like Sydney and Melbourne, nowhere near enough rainfall has occurred in the water catchments that supply most of the water for people and crops.
We only abstract for public water supply around 3% of effective rainfall in our region compared with, for example, over 50% in the South East of England.
We use just 3% of the effective rainfall in our region, compared with around 20% in the south east of England.
It should be noted that effective rainfall is considered in determining the field irrigation requirement.

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