Lake Idro

Lake Idro (Italian: Lago d'Idro, also Eridio from Latin: Eridius lacus, Lombard: Lac d'Ider, German: Idrosee) is an Italian prealpine lake of glacial origin situated largely within the Province of Brescia (Lombardy) and in part in Trentino.

Lake Idro
Lago d'Idro
Lake Idro Italy 2005-08-16.jpg
LocationProvince of Brescia and Trentino, Northern Italy
Coordinates45°46′48″N 10°30′36″E / 45.78000°N 10.51000°E / 45.78000; 10.51000Coordinates: 45°46′48″N 10°30′36″E / 45.78000°N 10.51000°E / 45.78000; 10.51000
Primary inflowsChiese, Caffaro, Re di Anfo
Primary outflowsChiese
Catchment area617 km2 (238 sq mi)
Basin countriesItaly
Max. length11 km (6.8 mi)
Max. width1.9 km (1.2 mi)
Surface area11.4 km2 (4.4 sq mi)
Max. depth122 m (400 ft)
Water volume335 hm3 (272,000 acre⋅ft)
Shore length124 km (15 mi)
Surface elevation368 m (1,207 ft)
SettlementsBondone, Idro, Anfo, Bagolino
1 Shore length is not a well-defined measure.

At 368 m above sea level it is the highest of the Lombard prealpine lakes. The lake is fed principally by the waters of the river Chiese; that river is also its only emissary. It has a surface area of 11.4 km² and a maximum depth of 122 m.

The lake is surrounded by wooded mountains. The shoreline of some 24 km is shared between four communes: Idro (the frazioni Crone and Belprato), from which the lake takes its name, Anfo, Bagolino (fraz. Ponte Caffaro) and Bondone (fraz. Baitoni).

Lake Idro currently faces severe problems of eutrophication resulting from the absence of adequate sewerage systems and the use of its feed-waters for irrigation and the generation of hydropower: it has become a site of conflict between environmental, agricultural and electricity industry interests.

The name derives from a legendary monster ( Idra ) who supposedly lived there

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