To provide measures against turbid water, appropriate for a flood control dam.
The quantity of water not disturbing a sedimentation area 13 even if the water flows into the sedimentation area 13 is called a small quantity of water. In this case, the water flows into the sedimentation area 13 as shown in Fig. (a). The quantity of water disturbing the sedimentation area 13 when the water flow into the sedimentation area 13 and larger than the small quantity of water flows is called an intermediate amount of water. In this case, a tilting weir 14 is raised as shown in Fig (b). Thus, the water flows through a roundabout channel 15 without reaching the sedimentation area 13, and reaches a water discharge outlet 11. This makes clear water discharged from the water discharge outlet 11. In the case of the small quantity of water, the tilting weir is tilted. The turbid water is not produced by virtue of the small quantity of water, though the water flows over the tilting weir, flows in the sedimentation area, and reaches the water discharge outlet. In the case of the intermediate quantity of water, the tilting weir is raised. The water is dammed up by the tilting weir, and does not reach the sedimentation area. Since the water reaches the water discharge outlet via the roundabout channel, the turbid water is not produced. Consequently, the risk of the production of the turbid water is eliminated in both the cases of the small quantity of water and the intermediate quantity of water.
TAKASU SHUJI
HIGUCHI ATSUMI
| JPS6238929U | 1987-03-07 | |||
| JP2005194785A | 2005-07-21 | |||
| JPH09143961A | 1997-06-03 |