石垣島・水田地帯からの浮遊土砂流出量の長期観測およびL-Q式の適用
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概要
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Suspended sediment runoff from paddy fields is neglected compared with sediment runoff from sugarcane and pineapple fields in the Ishigaki Island, Okinawa. We observed suspended sediment runoff from the double-cropping paddy fields of the island and examined the applicability of L-Q equation for the observations. Firstly, the annual suspended sediment load was 7,130 kg per ha. The runoff load during no-rainfall periods accounted for 54 percentages of the total runoff load, and the runoff load in puddling and transplanting periods accounted for 76 percentages of the total. Secondly, the different specific L-Q equations in puddling and transplanting periods and the other period improved the estimation of the annual suspended sediment runoff load.
- Japan Society of Civil Engineersの論文
Japan Society of Civil Engineers | 論文
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