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Quantifying Soil Erosion and Resulting Nutrient Movements Under Natural Field Conditions: An Update

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Abstract:

Quality soil erosion data from natural field conditions are few but necessary for many modeling studies. We developed a simple field method that quantifies soil erosion and the resulting nutrient movements based on the principle of a mesh-bag (MB) method that samples the spatial redistribution of the remaining eroded soil on a slope after a runoff event. We evaluate the effectiveness of the MB method and the factors that control the effectiveness. Results of this study show that the amounts of soil erosion estimated by the MB method and the runoff plot (RP) method are positively correlated, although the former is more efficient under milder runoff conditions while the latter is more efficient under severe runoff conditions. The effectiveness of the MB method increased as the plot size increased or the slope decreased. The upper limits of MB method to quantify soil erosion are 6 t/ha and 11 t/ha for 35 m2 -size plots and 11 t/ha for 50 m2-size plots, respectively, in a range of slope from 5 to 25 %. The MB method causes little disturbance to the natural runoff pattern and provides a sensitive and convenient means to quantify soil erosion from plot to landscape scales. The additional spatial and temporal patterns of eroded soil distribution revealed by the MB method could be valuable to the understanding and prediction of soil erosion and resulting nutrient movement in watersheds.
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Association:
Name: SOIL AND WATER CONSERVATION SOCIETY
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http://www.swcs.org


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URL: http://citation.allacademic.com/meta/p235567_index.html
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MLA Citation:

Hsieh, Y. Ping., Grant, Kennard. and Bugna, Glynnis. "Quantifying Soil Erosion and Resulting Nutrient Movements Under Natural Field Conditions: An Update" Paper presented at the annual meeting of the SOIL AND WATER CONSERVATION SOCIETY, TBA, Tucson, Arizona, Jul 26, 2008 <Not Available>. 2013-12-14 <http://citation.allacademic.com/meta/p235567_index.html>

APA Citation:

Hsieh, Y. , Grant, K. and Bugna, G. , 2008-07-26 "Quantifying Soil Erosion and Resulting Nutrient Movements Under Natural Field Conditions: An Update" Paper presented at the annual meeting of the SOIL AND WATER CONSERVATION SOCIETY, TBA, Tucson, Arizona <Not Available>. 2013-12-14 from http://citation.allacademic.com/meta/p235567_index.html

Publication Type: Oral Presentation
Abstract: Quality soil erosion data from natural field conditions are few but necessary for many modeling studies. We developed a simple field method that quantifies soil erosion and the resulting nutrient movements based on the principle of a mesh-bag (MB) method that samples the spatial redistribution of the remaining eroded soil on a slope after a runoff event. We evaluate the effectiveness of the MB method and the factors that control the effectiveness. Results of this study show that the amounts of soil erosion estimated by the MB method and the runoff plot (RP) method are positively correlated, although the former is more efficient under milder runoff conditions while the latter is more efficient under severe runoff conditions. The effectiveness of the MB method increased as the plot size increased or the slope decreased. The upper limits of MB method to quantify soil erosion are 6 t/ha and 11 t/ha for 35 m2 -size plots and 11 t/ha for 50 m2-size plots, respectively, in a range of slope from 5 to 25 %. The MB method causes little disturbance to the natural runoff pattern and provides a sensitive and convenient means to quantify soil erosion from plot to landscape scales. The additional spatial and temporal patterns of eroded soil distribution revealed by the MB method could be valuable to the understanding and prediction of soil erosion and resulting nutrient movement in watersheds.

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