PROBLEM TO BE SOLVED: To provide a rain gauge water filter and a tipping-bucket rain gauge having it for normally observing a rainfall amount even in the case of an overflow. ;SOLUTION: In this rain gauge constructed of a funnel 11 having a water receiving port 13 in the upper edge and a pipe insertion port in the lower end part and a pipe 12 inserted from the pipe insertion port so as to be mounted in the funnel 11, dust such as sand contained in rainwater is deposited in the lower end part of the funnel 11, while rainwater is introduced from the water receiving port 13 in the upper edge of the pipe 12 to a drain port 12a in the lower end part of the pipe 12 so as to be led to a tipping bucket to be put down for measuring a rainfall amount every time when a rainwater amount reaches a fixed amount. In this rain gauge, between the water level of the edge side of the water receiving port 13 of the funnel 11 and the water level of a water inlet of the pipe 12, a flowing water port for a water flow-down area 20 for letting overflowing rainwater to flow down along the outside wall of the 1 funnel 11 toward the lower part of the pipe 12 is arranged.;COPYRIGHT: (C)2000,JPO
展开▼
