Lake Võrtsjärv

Lake Võrtsjärv is the second-largest lake in Estonia, after Lake Peipus, and is located in the Tartu County and Viljandi County regions. The lake is an important part of the Emajõgi river system, which flows into Lake Peipus and eventually into the Gulf of Finland via the Narva River. The lake's water level is regulated by the Tartu hydroelectric power plant and the Emajõgi river. The lake is also close to the Soomaa National Park and the Tartu County capital, Tartu.

Introduction

The lake has been an important part of the regional ecosystem and has been influenced by various geological and climatic factors, including the Baltic Ice Lake and the Eemian interglacial period. The lake's shoreline is approximately 100 kilometers long and features several bays and peninsulas, including the Valma Peninsula and the Rõika Bay. The lake is also home to several islands, including the Tondisaar Island and the Piirissaar Island, which are both part of the Piirissaare municipality. The lake's water quality is monitored by the Estonian Environment Agency and the Tartu University.

Geography

The lake is situated in the Estonian lowland region, which is characterized by a flat to gently sloping topography. The lake's shoreline is generally low-lying and features several wetlands and floodplains, including the Soomaa National Park and the Emajõgi river delta. The lake is also close to the Otepää upland region, which features several hills and valleys. The lake's geology is characterized by glacial deposits, including till and sand, which were formed during the Pleistocene ice age. The lake is also influenced by the Tartu fault zone, which runs through the Tartu County region.

Hydrology

The lake's hydrology is characterized by a complex system of inflows and outflows, including the Väike-Emajõgi and Tanassilma River inflows and the Emajõgi river outflow. The lake's water level is regulated by the Tartu hydroelectric power plant and the Emajõgi river. The lake's water balance is also influenced by precipitation and evaporation, which are monitored by the Estonian Meteorological and Hydrological Institute. The lake is also connected to the Lake Peipus via the Emajõgi river, which flows into the Gulf of Finland via the Narva River. The lake's hydrology is also influenced by the Tartu water treatment plant and the Estonian drainage system.

Ecology

The lake's ecology is characterized by a diverse range of aquatic and terrestrial species, including fish, birds, and plants. The lake is an important habitat for several endangered species, including the Eurasian otter and the white-tailed eagle. The lake's water quality is monitored by the Estonian Environment Agency and the Tartu University, which conduct regular water sampling and ecological surveys. The lake is also home to several wetlands and floodplains, including the Soomaa National Park and the Emajõgi river delta, which provide important habitat for several species. The lake's ecology is also influenced by the Tartu botanical garden and the Estonian nature conservation efforts.

Human Impact

The lake has been influenced by various human activities, including agriculture, urbanization, and industrialization. The lake's water quality has been affected by pollution from agricultural runoff and industrial waste, which are monitored by the Estonian Environment Agency and the Tartu University. The lake is also used for recreation and tourism, including fishing, boating, and birdwatching. The lake's shoreline is also home to several settlements and cities, including Tartu and Viljandi, which have developed infrastructure and economy around the lake. The lake's human impact is also influenced by the Estonian environmental policy and the European Union environmental regulations. The lake is also close to the Tartu Airport and the Estonian transportation network.

Category:Lakes of Estonia