A PRELIMINARY STUDY OF EFFECTIVE RAINFALL

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  • 1 Weather Bureau, Knoxville, Tenn
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Abstract

SYNOPSIS

Since the water content of the soil does not change appreciably from year to year, each year's rainfall must escape in some manner.

In winter it escapes by evaporation and run-off in streams.

In summer it escapes by evaporation, by run-off, and by transpiration.

Transpiration may be increased at the expense of run-off by increasing the number and vigor of plants.

It appears that the possible effective rainfall for this region will average from 6 to 8 inches per year, which is enough to double the present average yield.

Abstract

SYNOPSIS

Since the water content of the soil does not change appreciably from year to year, each year's rainfall must escape in some manner.

In winter it escapes by evaporation and run-off in streams.

In summer it escapes by evaporation, by run-off, and by transpiration.

Transpiration may be increased at the expense of run-off by increasing the number and vigor of plants.

It appears that the possible effective rainfall for this region will average from 6 to 8 inches per year, which is enough to double the present average yield.

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