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Soil infiltration, runoff and sediment yield from a shallow soilwith varied stone cover and intensity of rain

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Title Soil infiltration, runoff and sediment yield from a shallow soilwith varied stone cover and intensity of rain
Soil infiltration, runoff and sediment yield from a shallow soilwith varied stone cover and intensity of rain
 
Creator ICAR_CRIDA
 
Subject Soil infiltration, runoff and sediment, yield, shallow soilwith , stone cover intensity of rain
 
Description Not Available
Stones on the surface of the soil enhance infiltration and protect the soil against erosion. They are often
removed in modern mechanized agriculture, with unfortunate side-effects. We evaluated experimentally
the influence of surface stones on infiltration, runoff and erosion under field conditions using a portable
rainfall simulator on bare natural soil in semi-arid tropical India, because modernization and mechanization
often lead to removal of these stones in this region. Four fields with varied cover of stones from 3
to 65% were exposed to three rainfall intensities (48.5, 89.2 and 136.8mmhour 1). Surface stones
retarded surface runoff, increased final infiltration rates, and diminished sediment concentration and
soil loss. The final infiltration ranged from 26 to 83% of rainfall when the rainfall intensity was 136.8mm
hour 1. The reduction in runoff and soil erosion and increase in infiltration were more pronounced where
stones rested on the soil surface than where they were buried in the surface layer. The sediment yield
increased from 2 g l 1 for 64.7% stone cover with rainfall of 48.5mm hour 1 to 70 g l 1 for 3.5% stone
cover with rain falling at 136.8mm hour 1. The soil loss rate was less than 2 t ha 1 hour 1 for the field
with stone cover of 64.7% even when the rainfall intensity was increased to 136.8mm hour 1. The effects
of stones on soil loss under the varied rainfall intensities were expressed mathematically. The particles in
the sediment that ran off were mostly of silt size.
Not Available
 
Date 2020-02-25T05:45:30Z
2020-02-25T05:45:30Z
2005-08
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32492
 
Language English
 
Relation Not Available;
 
Publisher K. V. RAO, P. K. MISHRA, K. L. SHARMA