Hiroshima Plain - Hiroshima Heiya

An alluvial plain that unfolds in the lower reaches of the Ota River in western Hiroshima Prefecture. The Ota River joins the Misasa River in Kabe, in the north of Hiroshima City, and this narrow area stretches from the confluence to Hiroshima Bay, measuring 20 kilometers north to south and 5 kilometers wide at its widest point. The northern part is a floodplain, while the lower reaches are divided into six parts by the Ota River, forming a delta called the Hiroshima Delta. The central city area of ​​Hiroshima is located here, but the area south of the Peace Memorial Park was reclaimed during the Hiroshima Domain era, and was filled in after World War II. Hijiyama and Ebayama are former islands that have been closed off. Asakita Ward and Minami Ward, which occupy the northern floodplain, were once suburban farming villages where vegetables were grown, but have become increasingly urbanized and turned into residential and industrial areas.

[Kitagawa Kenji]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

広島県西部、太田(おおた)川の下流に展開する沖積平野。太田川は広島市北部の可部(かべ)で三篠(みささ)川と合流するが、この合流点から広島湾までの南北約20キロメートル、最大幅約5キロメートルの細長い地域をいい、北部は氾濫原(はんらんげん)、下流域は太田川が六分流し、広島デルタとよばれる三角州を形成している。広島市の中心市街地がのるが、平和記念公園以南は広島藩政期に干拓化、第二次世界大戦後は埋立てが進んだ地。比治(ひじ)山、江波(えば)山などはかつての島が陸封されたものである。北部の氾濫原を占める安佐北区、同南区は、かつては近郊農村で蔬菜(そさい)栽培地であったが、都市化が進み、住宅地、工場地となっている。

［北川建次］

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