Geographically Geographically, Riau Province lies on 445' North Altitude up to 115' South Longitude or 10003' up to 10919' Greenwich and 650' up to 145' West Longitude Jakarta, with natural borders as follows: North side: North Sumatra Province, Malacca Straits South side: Jambi Province West Side: West Sumatra Province East side: Riau Archipelago Administratively Riau Province is administratively divided into 9 Regencies (Bengkalis, Indragiri Hilir, Kampar, Kuantan Singingi, Pelalawan, Rokan Hilir, Rokan Hulu, Siak) and 2 cities (Pekanbaru, Dumai), with Pekanbaru as the capital city. Climate This region is dominantly characterized by the sea climate with average temperature of 30°C at day and 23°C at night throughout the year. Rainy season falls on November (sometimes October) up to April while dry season begins in July. Riau has tropical climate and in general is classified into climate type "A" with relatively high rainfall, ranging from 2,000 to 3,000 mm per year in average. Topography Most areas in Riau are lowland plain, including alluvial islands scattered along coastal line with average elevation less than 200 m above sea level. In mainland region, there are four big rivers, i.e. Rokan River, Siak River, Kampar River and Indragiri River. These rivers spring from Bukit Barisan mountain range stretching along the border Riau Province and West Sumatra Province, and flow down to Malacca Straits. The rivers play an important role as the means of transportation, sources of irrigation, energy, and clean water as well as fishery resources. Archipelagic region of Riau, on the other hand, is formed of volcanic formation in the form of islands, big and small. The soil is in general of Organosol type (Histosol), containing much organic substance. Wide Area The territorial size of Riau Province is 329,867.16 km consisting of land area 94,561,61 Km2 and water area 235,306,00 Km2. Riau population is 4,948,000 (2000 census). |
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