The Aavoja is a 22.1 km (13.7 mi) long river in Anija Parish, Harju County, Estonia that flows into Jägala river near Kehra.
| Aavoja Kehra oja, Pillapalu peakraav | |
|---|---|
| Location | |
| Country | Estonia |
| County | Harju |
| Parish | Anija |
| Physical characteristics | |
| Source | near Koitjärve Bog in Pillapalu |
| • coordinates | 59°21′22″N 25°38′7″E |
| • elevation | 67.5 m (221 ft) |
| Mouth | Jägala River near Kehra |
• coordinates | 59°20′15″N 25°20′48″E |
• elevation | 44.5 m (146 ft) |
| Length | 22.1 km (13.7 mi) |
| Basin size | 69.1 km2 (26.7 sq mi) |
| Discharge | |
| • location | before Aavoja Reservoir |
| • average | 1 m3/s (35 cu ft/s) |
| Basin features | |
| Progression | Jägala River → Gulf of Finland |
| Tributaries | |
| • left | Verioja |
| • right | Aruoja, Raudoja-Aavoja Canal |
The current source is located in Pillapalu village, just south of Koitjärve Bog. The upstream part of the river was dug in the 1930s to drain Aguparra Bog.[1]
Väike-Aavoja and Aavoja reservoirs are located on the river. The river is part of Tallinn water supply system. The basin area of the river is 69.1 km2 (26.7 sq mi).[2]
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