Rondonia (English spelling)

In 1757, the western half of the state was separated to become São José da Barra do Rio Negro, then Rio Negro, and after the establishment of the Republic (1889), it became the state of Amazonas. Many of its borders are in the area, and in 1943, for defense reasons, Rio Branco (now Roraima) and Guaporé (now Rondônia) were incorporated into the Amazonas territory. However, the state still shares borders with Venezuela, Colombia, and Peru, and these countries have administrative districts of the same name. Near the border with Venezuela, it borders the Guiana Highlands and contains Mount Neblina (3,014m), the highest point in Brazil, but most of the state is the so-called Upper Amazonia, or Amazon Basin, and is a tropical rainforest with major rivers such as the Amazon River, its tributaries the Rio Negro and the Madeira River flowing down it. In the state capital, Manaus, the average annual temperature is 26.7°C, the maximum temperature is around 32°C, the annual precipitation is 2,243mm, and there is a short dry season from July to September.

*Some of the terminology that mentions "Rondônia" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…1757年その西半分が分離し，サン･ジョゼ･ダ･バラ･ド･リオ･ネグロSão José da Barra do Rio Negroとなり，その後リオ･ネグロとなり，共和制実施(1889)後アマゾナス州となる。国境と接する所が多く，1943年国防上の理由からリオ･ブランコ(現在のロライマRoraima)，グアポレ(現在のロンドニアRondônia)が準州に編入されたが，いまでも，ベネズエラ，コロンビア，ペルーと国境を接し，これらの国には，同名の行政区がある。ベネズエラ国境付近ではギアナ高地に接し，ブラジルの最高点ネブリーナ山(3014m)があるが，大部分はいわゆる上アマゾニア，またはアマゾン盆地をその領域とし，アマゾン川本流，その支流ネグロ川，マデイラ川等の大河が流下する熱帯雨林で，州都マナウスで年平均気温26.7℃，最高気温は32℃くらい，年降水量は2243mm，7～9月に短い乾季がある。…

※「Rondônia」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報