| 摘要 |
The riparian improvement structure unit for use in construction work for water control and protection is composed of the first tubular member and a plurality of stick-and-twig members tied in a bundle with a bundling member, the first tubular member being formed with a plurality of holes through which to allow fresh water with dissolved oxygen present in water flowing through the first tubular member to pass into spaces and gaps formed within the plurality of the stick-and-twig members. The riparian improvement structure unit may have the second tubular member disposed along and in parallel to the first tubular member and tied together with the first tubular member and the plural stick-and-twig members in a bundle with the bundling member. The riparian improvement structure units are laid on a riverbed or a bottom of a riparian area along or in parallel to a flow of water so as to allow water to flow and pass through and within the riparian improvement structure units.
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