沖縄国頭マージの造成農地における浮遊土砂流出について

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タイトル別名
  • Suspended Soil from Reclaimed Farmland of Kunigami-Maji Area in Okinawa
  • オキナワ クニガミ マージ ノ ゾウセイ ノウチ ニ オケル フユウ ドシャ

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In order to elucidate the relationship between the amount of suspended soil and the discharge of runoff within a certain period of time, an observation of the amount transported from reclaimed farmland was made. The peak of the density of suspended soil and that of discharge occur at almost the same time when the source of suspended soil is distributed throughout the basin. Their relationship is expressed in a parabolic curve. Newly reclaimed farmland is likely to be unstable because the differential settlement and the slope failure are common, and at the same time, there is a strong probability of large-scale erosion. The result has revealed that the erosion of land surfaces in pineapple fields is constantly underway. And the source of suspended soil is the place where unlined canals or branch roads are laid.

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