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Suspended Solids Export by the Outflowing Water from Irrigation Paddy Field during Rice Growing Season of Korea
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 Title & Authors
Suspended Solids Export by the Outflowing Water from Irrigation Paddy Field during Rice Growing Season of Korea
Zhang, Yongseon; Jung, Kangho; Cho, Hye-Rae; Han, Kyeong-Hwa; Kim, Min-Kyeong; Sonn, Yeon-Kyu;
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This experiment was conducted in Suwon and Iksan city from 2012 to 2014 to evaluate soil erosion and nutrient loss from irrigated paddy fields during cropping period. Rainfall amount and rainfall erosivity of were, on average, 1,026 mm and for the cropping period, respectively, and the rainfall event with maximum occurred in July. Annual average of runoff was in Suwon and in Iksan, accounting for 36% of rainfall of the cropping period. Nutrient loss by runoff, on average, was , , and ; N, P, and K loss were 5.0, 0.6, and , respectively, in Suwon and 8.9, 1.9, and in Iksan. Soil loss in Korean paddy rice was evaluated as ranging from to . Amount of soil loss, however, depended on areas and year influenced by variation of rainfall amount and intensity. Interestingly, soil erosion in Iksan in 2012 was remarkably greater than those in other periods due to heavy rainfall between late May and June with soil flake dispersion right after the rice-planting season.
Soil loss;Runoff;Irrigation Paddy Field;Rice;
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