Masuda River Dam - Masuda

usually

Next time is the autumn leaves season.

The toilet is at the entrance office!

You don't need anything. There was a toilet mark on the information sign of the parking lot of the dam, but there was no toilet.

12/12/2020 Although it is in the same Shimane prefecture, unlike Hamada Dam and No. 2 Hamada Dam, this Masudagawa Dam is one of my favorite dams. The Hamada Dam has two regular flood discharges installed at the same height above the river surface, so there is always a small amount of water stored. Therefore, it is a dam that stores only a small amount of water upstream of the dam and collects garbage on the surface of the water to keep it clean. The No. 2 Hamada Dam has two regular flood discharges installed, but the heights of the installations are different. It seems that the amount of water discharged is being changed step by step depending on the amount of flowing water. This Masudagawa dam's regular flood discharge has no water storage because the bottom of the river is the same height as the regular flood discharge. This Masudagawa dam is a flood control dam. Hamada Dam and No. 2 Hamada Dam are crazy mons I hate that dam Also, there are people who say that there is no toilet even though there is a toilet notation, but ... The toilet is on the left side of the wife when you look at the entrance of the administration building in front of you. Blind walls are also installed so that the entrance cannot be seen directly. I don't know ————————- Masudagawa Dam is the first dam in Japan that does not store water in a reservoir during normal times. Only one letter F is written on the dumb card. The conventional dam has a regular flood discharge at the top of the dam. The water of the dam collects in the reservoir and a dam lake is created. And when the water level rises to the regular flood discharge, water will flow downstream from that water level for the first time. In other words, water is always stored in the reservoir. However, this Masudagawa dam has regular flood discharges (two without gates) at the bottom of the dam. Normally, the flowing water, sand, and earth and sand are also flowing downstream. And it means that water does not accumulate in the dam lake and water always flows on the bottom of the river like a river. It also means that fish and other creatures that live in the river can run upstream without creating a fishway. And there are three concrete tsuitates standing like a monolith in the river from the upstream that flows into the dam. This is called a driftwood capture work, and it is for damming the sediment water and driftwood that flowed from the upstream at the time of flood so as not to block the regular flood discharge. And in addition to that, there is an iron grill on the inflow side of the regular flood discharge. This is called a driftwood stop facility, which literally prevents driftwood from flowing into the regular flood discharge and clogging the drain. Why was such a dam built on this Masuda River? The headwaters of the Masuda River are in Kasugayama The length of the channel is 29.8 km, which is a second-class river, but the tributaries that flow into the main river are the Hata side river, the Mitani river, the Hon overflow river, etc. The basin area is 126.7 km square meters, most of which is mountainous Moreover, since the upstream area is deep in the Chugoku Mountains, the Masuda River becomes a rapid stream that flows through steep valleys. It has a terrain that tends to rise at once when it rains. For that reason, the Masuda River basin has been flooded many times. And the heavy rain in 1983 caused damage to 39 dead and more than 1,700 half-destroyed houses. And we built this Masuda River dam to protect the Masuda River basin from floods. Redeveloped the Sasakura Dam on the Hata River, a tributary of the Masuda River March 2006 Completion of Masudagawa Dam March 2007 Completed Sasakura Dam Dams with no water in the reservoir are really rare. Why don't you come visit us once? This dam also has a dam card I'd love to!