| 摘要 |
PROBLEM TO BE SOLVED: To provide a water level control system of a rainwater storage tank, capable of storing rainwater in a management area in a storage tank to prevent flood in a site and perform efficient and effective water utilization.SOLUTION: A rainwater inflow channel, a water discharge pipe, a water supply pipe, and a refill pipe of a management water service are connected to and arranged in a water storage tank, and an on-off valve and a lifting pump are arranged in each pipe. A management water level (which is a "target water level" for balancing inflow/outflow water in the tank) G and an exhaustion limit water level L are set. Then, an actuator for controlling opening/closing of each on-off valve and control means for driving a water feeding pump and a water discharge pump are controlled according to a control program. The control means is performed in a water storage operation mode when the amount of rainfall according to rainfall forecast is equal to or less than a predetermined value (k), and in a draining operation mode when the amount of rainfall according to rainfall forecast exceeds the predetermined value. |
