| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for an L-shaped block with a pot and a construction method for it capable of conserving an ecosystem and a landscape in a natural environment, purifying water, restoring a lake and a river for cultivation of a large-size carp or crucian. SOLUTION: Willows naturally growing along a natural riverbank spread their roots deep in the ground and extend the roots in the water for forming a shelf, and fish lives in an excavated hole for breeding. In an ordinary L-shaped block, a pot 15 having a plurality of horizontally long through holes 13 formed for planting the willows is installed in imitation of a ledge according to a water depth, a water quantity and a mean water level, and though the through holes, the roots spread in the water. In the back face part of the L-shaped block, the roots spread in the river ground through a cutout formed according to the dimension of the pot. In preparation for a just planted condition or a dry season, a duct 18 with a proper thickness is installed in a proper position in the ground inside the pot in parallel to the L-shaped block with the pot, and underground water is introduced from the upstream side by means of a pump. Consequently, the willows are rooted to grow for forming the fishing bank, and protection of the ecosystem, purification of water, and conservation of the landscape can be accomplished.
|
