ESTIMATION OF TOTAL NITROGEN CONTAINED IN THE PRECIPITATION BY THE WASH-OUT AND THE RAIN-OUT

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  • ウオッシュアウトおよびレインアウトによる降雨中全窒素含有量の推定

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The annual amount of the supplied total nitrogen (TN) from the atmosphere into the land surface through the rainwater was estimated from the field observations and the numerical model of theTN balance of the atmosphere. Especially, the TN contained in the precipitation was separately measured in the single precipitation event to evaluate the amount of the TN contained by the rain-out. As the result, the annual amounts of the TN by the rain-out and the wash-out were respectively estimated as 0.86 and 0.13 t/km2/y in the forested mountain areas, and the annual amounts of the TN by the wash-out were respectively estimated as 0.97 and 0.18 t/km2/y in the urban area.

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