Research Article
Jan 1981
Surface Hydrology: II—Distribution of Raindrops
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VIEW THE REPLYAuthors: Dan Zaslavsky and Gideon SinaiAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 107, Issue 1
Abstract
Nonuniformity of rainwater distribution over a given soil area is due to two mechanisms. Raindrop splashes produce a net horizontal flow that is proportional to the slope and to the rate of the rainfall. A change in slope causes excess concentration of rain splashes in concave spots and reduces the rain over convex points. The concavity can be measured geodetically. The size of the horizontal discharge was deduced theoretically and measured on a sloping plane in a rain simulator. Both indicated the same order of magnitude. The horizontal discharge over short and steep slopes can reach a tenth of the total rain. The local excess rain can be up to half of the average rain. The other mechanism responsible for localized excess rain is the slanting of rain over slope facing it, as distinct from a soil slope in the rain shadow. This mechanism can lead to local doubling of the rain intensity.
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Published In
Journal of the Hydraulics Division
Volume 107 • Issue 1 • January 1981
Pages: 17 - 35
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Jan 1981
Published online: Feb 3, 2021
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Authors
Affiliations
Dan Zaslavsky
Prof. of Soil and Water Engrg., Faculty of Agricultural Engrg., Soils and Fertilizers Div., Technion-Israel Inst. of Tech., Technion City, Haifa, 32000, Israel
Gideon Sinai
Lect., Faculty of Agricultural Engrg., Soils and Fertilizers Div., Technion-Israel Inst. of Tech., Technion City, Haifa,32000, Israel
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