As part of Indonesian archipelago, Bali is one of the 33 Indonesian provinces that consisted of Bali as mainland, Nusa Penida Island & other small isles that has extend of 5,636,66 km2. Bali is situated between Java & Lombok Island, with the Java sea to the north, the Indonesian Ocean to the south, the Bali Strait & the province of East Java to the west, and Lombok strait & Lombok Island to the east. Bali is classified as a small island which is surrounded by smaller islands such as Nusa Penida, Nusa Lembongan & Nusa Ceningan in Klungkung regency, Serangan Island in Denpasar,and Menjangan Island in Buleleng regency. Administratively, the province of Bali is divided into 8 regencies (Badung, Gianyar, Bangli, Klungkung, Karangasem, Buleleng, Negara, and Tabanan), 1 minicipality (Denpasar), 55 of district or “Kecamatan”, 701 of administrative villages or “Kelurahan”, 1,430 of Traditional Villages or “Desa Pekraman” and 3,945 of sub unit local community called” Banjar Adat”.
Bali has a tropical climate, which is influenced by seasonal wind that changing every sixth month. Bali has two main season, dry season (April – October) and rainy season (October- April) with a transition period in between. The temperature are between 270 C and 300 C. The rainfall is vary, between the lowest 893,4mm to the highest 2,702.6mm within last five year averages, while the average humidity was about 60% in dry season and 90% during rainy season.
Mountain in Bali are lies stretching from west to east, splitting the island. Some of the mountains are volcanic & some are not. The volcanoes include Mount Batur (1,717m) and Mount Agung (3,142m). The non-volcanic mountains like: Mount Merbuk (1,356m), Mount Patas (1,414m), Mount Seraya (1,058m), Mount Prapat Agung (310m), Mt. Klatakan (698m), Mt. Sanghyang (1,004m), Mt. Tapak, Mt. Adeng (1,807m), Mt. Mesehe (1,334m), Mt. Musi (1,224m), Mt. Lesung (1,860m), Mt. Penggilingan (2,098m), Mt. Catur (2,096m), Mt. Penulisan (1,745m) and Mt. Abang (2,153m).
This mountain chain divides Bali into two distinct areas. In the north of the island, the mountain slopes are very steep, leaving just narrow lowland area along North Bali’s seashores. In the south, however, the mountain slopes are slight, forming a fertile plain which is always open to external influences. That is the main reason why the Balinese dwell in this area, and why South Bali also become the main centre of Balinese culture. The south is also home to many white sandy beaches – the most famous ones are include Kuta Beach & Sanur Beach.
There are 4 main lakes in Bali, Lake Buyan (367hectare) and Lake Tamblingan (115 hectare) both are in Buleleng regency. Lake Beratan (376 hectare) in Tabanan regency and Lake Batur (1,605 hectare) nestled between mount Batur and mount Abang in Bangli regency. The river getting their sources from springs, forest and lake and mostly flow to the south, such as: Unda river, Petanu river, Ayung river, Melangit river and others.
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