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vol. 5, nr. 1 (2005)
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Modelling water erosion in the monsoonal climate of the most extreme rainfalls in the world (Umiew catchment, Meghalaya Hills, India)
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Paweł Prokop
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Department of Geomorphology and Hydrology of Mountains and Uplands Institute of Geography and Spatial Organization, Polish Academy of Sciences ul. św. Jana 22, 31-018 Kraków |
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vol. 5 (2005), nr. 1,
pp. 121-128
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abstract:
The study area is the Umiew catchment covering 500 km2 in the area with the highest rainfalls in the world, reaching 12000 mm annually. The RMMF (Revised Morgan-Morgan-Finney) model is used in a GIS environment to assess soil loss. Annual soil erosion predicted by the model is moderate and ranges from 0 to 145 Mg ha-1 yr-1. The results show that soil loss rates are the lowest in the valley bottoms under rice cultivation – below 1 Mg ha-1 yr-1. The highest erosion rates are under potato cultivation on short and steep slopes with inclination up to 40o. The erosion rate of 5 Mg ha-1 yr-1 was estimated as upper limit of average annual soil loss under dense subtropical forest in the area of the highest rainfalls.
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keywords:
soil erosion, erosion models, India
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original in:
Polish
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