Sayama Hills

Japanese: 狭山丘陵 - さやまきゅうりょう

This hill lies on the border between Tokyo and Saitama Prefecture. It is spindle-shaped on the Musashino Plateau, with the highest point being 194 meters in the west and 80 meters in the east, and its relative elevation from the plateau is 20 to 55 meters. The geology of the hill is an old diluvial deposit called the Sayama Formation, and on top of it is the Tama Loam Formation, which is up to 30 meters thick. In the eastern part of the hill, there are two eroded valleys, one north and one south, carved by the Yanase River, but today these have been dammed up to form reservoirs for Tokyo's water supply, called Lake Tama and Lake Sayama. The entire area is a scenic spot surrounded by red pine forests and mixed forests, and is designated as a natural park run by the Tokyo Metropolitan Government and Saitama Prefecture. Seibu Railway built the Tama Lake Line and Sayama Line here, and tourist facilities such as the Lily Garden and Seibu Garden have been built.

[Masatami Nakayama]

Lake Tama
Its official name is Murayama Reservoir. It is an artificial lake consisting of two reservoirs, Murayama Kami Reservoir, completed in 1924 (Taisho 13) and Murayama Shimo Reservoir, completed in 1927 (Showa 2), and is one of the important water sources for Tokyo. The photo shows Murayama Shimo Reservoir, with the first intake tower, which is a symbol of the lake, in the foreground and the second intake tower in the background. Higashiyamato City, Tokyo © Tokyo Metropolitan Waterworks Bureau ">

Lake Tama

Lake Sayama
This artificial lake was created by damming the Yanase River. It is also called the Yamaguchi Reservoir. It was completed in 1934 (Showa 9). It was built following the Murayama Reservoir (Lake Tama) to secure drinking water for Tokyo. It is located in the center of Saitama Prefectural Sayama Nature Park, and the lakeside is also a famous cherry blossom viewing spot. The photo shows the first water intake tower, which is also the symbol of Lake Sayama. Tokorozawa City, Saitama Prefecture © Tokyo Metropolitan Waterworks Bureau ">

Lake Sayama

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

東京都と埼玉県の境にある丘陵。武蔵野台地(むさしのだいち)上に紡錘形をなして存在し、最高点は西部で194メートル、東部で80メートルで、台地面との比高は20～55メートルとなっている。丘陵の地質は狭山層とよばれる古い洪積層で、上部には厚さ30メートルにも及ぶ多摩ローム層がのっている。丘陵の東部には、柳瀬(やなせ)川によって刻まれた南北二つの侵食谷があるが、今日ではこれらをせき止めて多摩湖、狭山湖とよぶ東京都の上水道の貯水池となっている。一帯はアカマツ林や雑木林に囲まれた景勝地で、都立および埼玉県立の自然公園に指定されている。西武鉄道はこの地に多摩湖線と狭山線を引き、ゆり園や西武園などの観光施設がつくられている。

［中山正民］

多摩湖
正式名称は村山貯水池。1924年（大正13）完成の村山上貯水池と1927年（昭和2）完成の村山下貯水池の二つからなる人造湖で、東京都の重要な水源の一つである。写真は村山下貯水池で、手前に湖のシンボルともなっている第一取水塔、奥側に第二取水塔が見える。東京都東大和市©東京都水道局">

多摩湖

狭山湖
柳瀬川をせき止めてつくった人造湖。山口貯水池ともいう。1934年（昭和9）完成。東京都の上水を確保するため、村山貯水池（多摩湖）に続いてつくられた。埼玉県立狭山自然公園の中心にあり、湖畔はサクラの名所でもある。写真は狭山湖のシンボルでもある第1取水塔。埼玉県所沢市©東京都水道局">

狭山湖

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