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Friday, July 12, 2013

Mount Fuji (2)

I live in Yokohama, Kanagawa Prefecture. About 90% of the water in the prefecture is from the Sagami and Sakawa rivers. Lake Yamanaka(山中湖, Yamanakako) is the headwaters lake of the Sagami River, and the water from Oshino Hakkai(忍野八海, eight springs in Oshino Village)  empties into the river. The source of the Sakawa River is in Gotenba City located at the east foot of Mount Fuji, and the water from Tanzawa mountains empties into the river.

Lake Yamanakako,  one of Fuji Five Lakes
Mt. Myojin (明神山)
Mt. Myojin (明神山) by stanchow /flickr

Lake Yamanakako
yamanakako-roadrace by mas_to /flickr

Oshino Village
photo by 高画質壁紙写真集無料壁紙

Wakuike Pond(湧池), one of the eight springs in Oshino Village
忍野八海 涌池 Oshino Hakkai Waku Pond
忍野八海 涌池 Oshino Hakkai Waku Pond by ume-y /flickr

Okamaike Pond(お釜池), one of the eight springs in Oshino Village
忍野八海 御釜池 Oshino Hakkai Okama Pond
忍野八海 御釜池 Oshino Hakkai Okama Pond by ume-y /flickr

Kagamikke Pond(鏡池), one of the eight springs in Oshino Village
忍野八海 鏡池 Oshino Hakkai Kagami Pond
忍野八海 鏡池 Oshino Hakkai Kagami Pond by ume-y /flickr

Nigoriike Pond(濁池), one of the eight springs in Oshino Village
photo by 高画質壁紙写真集無料壁紙

Oshino River
Oshino River by yendo0206 /flickr

Mount Fuji is the source of many rivers including these rivers, springs, the Fuji five lakes. Fuji has an annual rainfall of about 2.5 billion tons, and three quarters of the rainfall seep underground. However, no river flows over the surface of the mountain.

Lake Motosuko(本栖湖)
本栖湖からの富士山 - Mt.Fuji and Lake Motosuko
本栖湖からの富士山 - Mt.Fuji and Lake Motosuko by hogeasdf /flickr

Lake Kawaguchiko(河口湖)
photo by 高画質壁紙写真集無料壁紙

Lake Saiko(西湖)
photo by 高画質壁紙写真集無料壁紙

Lake Syojinko(精進湖)
精進湖からの富士山 - Mt.Fuji and Lake Shojiko
精進湖からの富士山 - Mt.Fuji and Lake Shojiko by hogeasdf /flickr

Fuji looks like a gently-sloping mountain with wide-flowing skirts. Because Fuji is a plate-boundary volcano and the low-viscosity basaltic lava flowed from it. Mount Fuji has erupted many times in the past. Lava (and sand gravel) layered like mille-feuille. Lava is impervious to water, so rain and melted snow flow on lava after seeping into the ground. Water gushes out at the end of the lava layer. Shiraito waterfalls(Shiraito-no-taki, 白糸の滝) gush out from between lava beds.

Shiraito waterfalls
Waterfall / 白糸の滝(しらいとのたき)
Waterfall / 白糸の滝(しらいとのたき) by TANAKA Juuyoh (田中十洋) /flickr

Shiraito waterfalls
白糸の滝 by fujitariuji /flickr
Along with Shizuoka and Yamanashi prefectures, Kanagawa have received much benefit from the mountain. Most of the water in other six prefectures in the Kanto Region is from the Tone and Arakawa rivers. In summer, the water intake from the Tone River is often restricted due to the extremely hot weather or lack of rainfall. However, the residents of Kanagawa seldom or never face a water shortage.

The eruptions of the Mt. Fuji produced many lava tubes, the Yoshida lava tree molds in 864 and the Funatsu lava tree molds in 932. Tree molds were formed when a lava flow swept through a forested area and surrounded trees.

Aokigahara Jukai(青木ヶ原樹海, Aokigahara Sea of Trees) is a primeval forest that lies at the northwest base of Mount Fuji. The forest was formed on lava that flowed from the mountain in 864. The forest containing many lava tubes(rocky and icy caverns) is a popular tourist spot with the walking trail. In the caverns, it' cold even in summer.
On the other hand, the forest is a popular place for suicides because of a famous mystery novel.

20080517 Aokigahara Woodlands
20080517 Aokigahara Woodlands by BONGURI /flickr

樹海の下-Under the sea of trees
樹海の下-Under the sea of trees by gomafringo /flickr

Sea of forest
Sea of forest by elminium /flickr

 Narusawa Ice Cave in Aokigahara
Ice by Raelene G /flickr

 Narusawa Ice Cave
Ice everywhere
Ice everywhere by Raelene G /flickr

Narusawa Ice Cave
Narusawa Ice Cave / 鳴沢氷穴
Narusawa Ice Cave / 鳴沢氷穴 by kawanet /flickr

Fugaku Wind Cave in Aokigahara
Fugaku Wind Cave / 富岳風穴
Fugaku Wind Cave / 富岳風穴 by kawanet /flickr

Mt Fuji Caves
Mt Fuji Caves by Danny Choo /flickr

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