Central Java - Geography

Geography

Located in the middle of the island of Java, the Central Java province is bordered by West Java and East Java provinces. A small portion of its south region is the Yogyakarta Special Region province, fully enclosed on the landward side by the Central Java province. Yogyakarta is historically and culturally part of the Central Java region, although it is currently a separate political entity. To the north and the south, the Central Java province faces the Java Sea and the Indian Ocean. Central Java also includes offshore islands such as Karimun Jawa Islands in the north, and Nusakambangan in the southwest.

The average temperature in Central Java is between 18–28 degrees Celsius and the relative humidity varies between 73–94 percent. While a high level of humidity exists in most low lying parts of the province, it drops significantly in the upper mountains. The highest average annual rainfall of 3,990 mm with 195 rainy days was recorded in Salatiga.

The geography of Central Java is regular with small strips of lowlands near the northern and southern coast with mountain ranges in the centre of the region. To the west lies an active stratovolcano Mount Slamet, then a bit further to the east is the Dieng Volcanic Complex on the Dieng Plateau. At southeast of the Dieng plateau lies the high plateau of Kedu Plain, bordered on the east side by the twin volcanoes of Mount Merapi (the most active volcanoes in Indonesia) and Mount Merbabu. At the south of Semarang, lies Mount Ungaran, and to the north-east of the city lies Mount Muria on the most northern tip of Java. To the east near the border with East Java lies Mount Lawu, where its eastern slopes are in the East Java province.

Due to active volcanics history and therefore volcanic ash, Central Java is a very fertile region for agriculture. Sight of extensive paddy fields is common, except in the southeastern — Gunung Kidul region — partly due to the high concentration of limestone and its location in a rain shadow from the prevailing weather.

Two major rivers run through Central Java; the Serayu River in the west, which empties into the Indian Ocean, and the Solo River (Javanese: Bengawan Solo), which flows to the East Java province.