About bogs
• Around 7000 bogs in Estonia• Up to 10 000 years old• Peat layer mostly 3 – 6 m. thick
• Bog walking• Exotic bog – shoeing hikes all year round
Development of a bog
• Swamp– Less water– More water on a
surface
• Transitional marsh– Terrestrialization
• Inosculation of a water body
– Paludification• Ground over
saturated
• Bog– Final stage– Huge water supplies– Water can be hidden
underground
Pihla bog
• Biggest bog in Hiiumaa– About 3050 ha
• Almost unhabited– Rare plants– Different animals
• Beginnings of important watercourses
• Thickest peat layer in Hiiumaa– About 4 m
• Peat is also quarried
Water analysis of Pihla bog
• pH 6– EU minimum value of swimming – pool water
• Ammonium level 0,05 mg/l– Recommended level– EU drinking water– Swimming – pool water– Fish – bowl water
• Phosphates level 0 mg/l
Water analysis of Pihla bog• Nitrites level 0,02 mg/l
–EU/USA drinking water–Fish – bowl water–Mineralwater
• Nitrate level 10 mg/l–Maximum level of food making water–EU/USA drinking water–Fish – bowl water–Mineral water