A. Geographic Profiles
Riau Provincial divides by land and water area. At water, area found 3,214 big and little islands. Some of 743 islands were have a name and majority little islands which widely spread at South China Sea are not inhabit. With estimate wide 329,867.61 km2, some of 71.33% are water area. Island zone of Riau Provincial that side of another country approximating with ZEE (Zone of Exclusive Economic) is 379.000 km2. The geographic of Riau Provincial spread out from Bukit Barisan until South China Sea. Laying between 1°15´ South Latitude until 4°45´ North Latitude or laying between100°03´-109°19´ East Longitude of Greenwich and 6°50´-1°45´ West Longitude of Jakarta. Fourth rivers come from Bukit Barisan upland and empty into Malaca Strait and South China Sea those influence by ebb. Those rivers are part of 15 rivers that have important influence for transportation like:
a) Siak River (300 km) and the depth between 8-12 m
b) Rokan River (400 km) and the depth between 6-8 m
c) Kampar River (400 km) and the depth between 6 m
d) Indragiri River (500 km) and the depth between 6-8 m
The borders of Riau Province are as follow:
a) North Side: Singapura Strait and Malaka Strait
b) South Side: Jambi Provincial and Berhala Strait
c) East Side: South China Sea
d) West Side: West Sumatera Provincial and North Sumatera Provincial
B. Climate and Rainfall
Riau region climate is wet tropical with rainfall average between 2000-3000 mm/year, which influence of dry season and rainy season. Average rain day per year approximating 160 days. Base of Metrology Station of Simpang Tiga, average temperature in Pekanbaru City optimize at 27,6 ° Celsius between 23,4-33,4° Celsius. The fog event was recorded at 39 times and the most frequency was on August is 6 times.
Resource : Riau.go.id
