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Rainfall erosivity and erosivity density in Eastern Ghats Highland of east India

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Title Rainfall erosivity and erosivity density in Eastern Ghats Highland of east India
Not Available
 
Creator Ch. Jyotiprava Dash · N. K. Das · Partha Pratim Adhikary
 
Subject Erosivity · Erosivity density · Spatiotemporal variation · Soil erosion · Eastern Ghats
 
Description Journal article
The rainfall erosivity (R-factor in USLE) is the long-term average of the sum of the product
of rainfall kinetic energy and its maximum 30-min intensity. Therefore, at most 30-min
time intervals pluviograph records are required to calculate R-factor. But, such high-resolution
data are scarce in many parts of the world and require lengthy processing period. In
this study, R-factor was correlated with daily, monthly and annual rainfall, and its spatial
variability in Eastern Ghats Highland of east India was mapped. The result showed that
power regression models predicted satisfactorily the daily, monthly and annual R-factor,
of which annual R-factor model performed best (model efficiency 0.93). Mean monsoon
season R-factor was 15.6 and 10.0 times higher than the pre- and post-monsoon season
R-factor, and thus remained highly critical with respect to erosion. Annual R-factor
values ranged from 3040 to 10,127 MJ mm ha−1 h−1 year−1, with standard deviation of
1981 MJ mm ha−1 h−1 year−1. Rainfall intensity was positively correlated with erosivity
density, and numerical value of rainfall intensity was almost double of the erosivity density
value. The combination of rainfall and erosivity density was used to identify flood, erosion
and landslide-prone areas. The developed iso-erosivity, erosivity density and risk maps can
be opted as a tool for policy makers to take suitable measures against natural hazards in
Eastern Ghats Highland of east India and elsewhere with similar rainfall characteristics
Not Available
 
Date 2021-07-19T05:13:44Z
2021-07-19T05:13:44Z
2019-07-23
 
Type Article
 
Identifier Not Available
15730840, 0921030X
http://krishi.icar.gov.in/jspui/handle/123456789/48681
 
Language English
 
Relation Not Available;
 
Publisher Springer Netherlands