In a broad sense, it refers to the entire plains of Toyama Prefecture. It is bounded to the east by the Tateyama mountain range of the Northern Alps, to the south by the northern Hida mountain range, and to the west by the Tonami hills, and faces Toyama Bay to the north. It is divided into the Goto Heiya and Gosei Heiya plains by the Kureha Hills in the center. The East Kure Plain consists of a composite plain of old and new alluvial fans, such as the Jinzu, Joganji, Kamiichi, Hayatsuki, and Katakai rivers, as well as the independent Kurobe River alluvial fan.The West Kure Plain consists of the low-lying deltaic Imizu Plain, the Tonami Plain, which is mostly made up of the Sho River alluvial fan, and the low-lying Himi Plain, which is separated by Mt. Futakami. The Toyama Plain in the narrow sense is part of the Kureto Plain, an alluvial plain facing Toyama Bay. It is an alluvial fan formed by the Jinzu River and the Jōganji River. The Jōganji River, which originates in Mt. Tateyama, is a rapid river with a large caldera collapse upstream that caused flooding in the plain by discharging large amounts of soil and sand. The center of the plain is Toyama City. [Saburo Fukai] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
広義には富山県の平野の全部をさす。東は北アルプスの立山(たてやま)連峰、南は飛騨(ひだ)の北部山地、西は礪波(となみ)の丘陵性山地に囲まれ、北は富山湾に面する地域で、中央部の呉羽(くれは)丘陵によって呉東平野(ごとうへいや)と呉西平野(ごせいへいや)に二分される。呉東平野は、神通(じんづう)川、常願寺(じょうがんじ)川、上市(かみいち)川、早月(はやつき)川、片貝(かたかい)川などの新旧扇状地の複合平野と独立的な黒部川扇状地からなり、呉西平野は、低平なデルタ性の射水(いみず)平野と庄(しょう)川扇状地が大部分を占める礪波平野、二上(ふたかみ)山で分離しているが低平な氷見(ひみ)平野からなる。 狭義の富山平野は呉東平野の一部で、富山湾に臨む沖積平野である。神通川と常願寺川により形成された扇状地で、立山に源流をもつ常願寺川は急流で、上流部にカルデラの大崩壊地があり、大量の土砂を流出し平野部に水害をもたらした。平野の中心は富山市である。 [深井三郎] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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