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|Basin countries||Sri Lanka|
|Max. depth||9–12 m (30–39 ft)|
|Surface elevation||1,074 m (3,524 ft)|
Sembuwatta Lake ( sinhala: සෙම්ඹුවත්ත ) is a tourist attraction situated at Elkaduwa in the Matale District of Sri Lanka, adjacent to the Campbell's Lane Forest Reserve. Sembuwatta Lake is a man-made lake created from natural spring water. Alongside the lake is a natural swimming pool.
Sembuwatta Lake is believed to be 9 m (30 ft) to 12 m (39 ft) deep. Currently the lake belongs to the Elkaduwa Plantations and produces electricity for the nearby villagers.
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Lake Eyre, officially known as Kati Thanda–Lake Eyre, is an endorheic lake in east-central Far North South Australia, some 700 km (435 mi) north of Adelaide. The shallow lake is the depocentre of the vast endorheic Lake Eyre basin, and contains the lowest natural point in Australia at approximately 15 m (49 ft) below sea level (AHD), and on the rare occasions that it fills completely, is the largest lake in Australia covering an area up to 9,500 km2 (3,668 sq mi). When the lake is full, it has the same salinity level as seawater, but becomes hypersaline as the lake dries up and the water evaporates.
Lake Baikal is a rift lake located in southern Siberia, Russia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast.
Subsidence is the sudden sinking or gradual downward settling of the ground's surface with little or no horizontal motion. The definition of subsidence is not restricted by the rate, magnitude, or area involved in the downward movement. It may be caused by natural processes or by human activities. The former include various karst phenomena, thawing of permafrost, consolidation, oxidation of organic soils, slow crustal warping, normal faulting, caldera subsidence, or withdrawal of fluid lava from beneath a solid crust. The human activities include sub-surface mining or extraction of underground fluids, e. g. petroleum, natural gas, or groundwater. Ground subsidence is of global concern to geologists, geotechnical engineers, surveyors, engineers, urban planners, landowners, and the public in general.
A sinkhole, also known as a cenote, sink, sink-hole, swallet, swallow hole, or doline, is a depression or hole in the ground caused by some form of collapse of the surface layer. Most are caused by karst processes – the chemical dissolution of carbonate rocks or suffosion processes. Sinkholes vary in size from 1 to 600 m both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide.
The Great Bear Lake is a lake in the Canadian boreal forest. It is the largest lake entirely in Canada, the fourth-largest in North America, and the eighth-largest in the world. The lake is in the Northwest Territories, on the Arctic Circle between 65 and 67 degrees of northern latitude and between 118 and 123 degrees western longitude, 156 m (512 ft) above sea level.
Mount Nyiragongo is an active stratovolcano with an elevation of 3,470 m (11,380 ft) in the Virunga Mountains associated with the Albertine Rift. It is located inside Virunga National Park, in the Democratic Republic of the Congo, about 20 km (12 mi) north of the town of Goma and Lake Kivu and just west of the border with Rwanda. The main crater is about two kilometres (1 mi) wide and usually contains a lava lake. The crater presently has two distinct cooled lava benches within the crater walls – one at about 3,175 m (10,417 ft) and a lower one at about 2,975 m (9,760 ft). Nyiragongo's lava lake has at times been the most voluminous known lava lake in recent history. The depth of the lava lake varies considerably. A maximum elevation of the lava lake was recorded at about 3,250 m (10,660 ft) prior to the January 1977 eruption – a lake depth of about 600 m (2,000 ft). Following the January 2002 eruption the lava lake was recorded at a low of about 2,600 m (8,500 ft), i.e., 900 meters below the rim. The level has gradually risen since then. Nyiragongo and nearby Nyamuragira are together responsible for 40% of Africa's historical volcanic eruptions.
The natural environment encompasses all living and non-living things occurring naturally, meaning in this case not artificial. The term is most often applied to the Earth or some parts of Earth. This environment encompasses the interaction of all living species, climate, weather and natural resources that affect human survival and economic activity. The concept of the natural environment can be distinguished as components:
The Blue Lake is a large, monomictic, crater lake located in a dormant volcanic maar associated with the Mount Gambier maar complex. The lake is situated near Mount Gambier in the Limestone Coast region of South Australia, and is one of four crater lakes on Mount Gambier maar. Of the four lakes, only two remain, as the other two have dried up over the past 30 to 40 years as the water table has dropped.
Durmitor is a massif located in northwestern Montenegro. It is part of the Dinaric Alps. Its highest peak, Bobotov Kuk, reaches a height of 2,523 meters (8,278 ft).
Matale District is a district in Central Province, Sri Lanka. It is one of 25 districts of Sri Lanka, the second level administrative division of the country. The district is administered by a District Secretariat headed by a District Secretary appointed by the central government of Sri Lanka. The administrative capital and largest city of the district is Matale.
Schoen Lake Provincial Park is a provincial park in northeastern Vancouver Island, British Columbia, Canada, located east of the community of Woss Lake and southwest of Sayward. The park lies inside the Nimpkish Valley watershed. On October 28, 1977, the "Class A" park was officially created to protect, exhibit and interpret an example of the natural features and processes of the Insular Mountains Natural Region. The park covers a total area of 8,775 hectares. Within those hectares of park land is a number of lakes, creeks and mountain ranges.
Willow River State Park is a 2,891-acre (1,170 ha) Wisconsin state park located five miles (8 km) north of Hudson. The centerpiece of the park is Willow Falls, a powerful cascade in a 200-foot (61 m) deep gorge. Another popular feature is Little Falls Lake, a shallow reservoir on the Willow River. Because of its proximity to Minneapolis-St. Paul it is one of the most visited state parks in Wisconsin. Trilobite fossils found in the lower layers of the gorge indicate the rock is around 600 million years old.
The Muskwa Ranges are a group of mountain ranges in northern British Columbia, Canada. They are part of the Northern Rockies section of the Rocky Mountains and are bounded on their west by the Rocky Mountain Trench and on their east by the Rocky Mountain Foothills. They are delimited on the north by the Liard River and on the south by the Peace Reach of the Lake Williston reservoir, south of which the next major grouping of the Rockies is the Hart Ranges.
Azufral is a stratovolcano located in the department of Nariño in southern Colombia, 12 km (7 mi) west of the town of Túquerres. It is the only volcano of the Western Ranges of the Colombian Andes. Its name derives from the Spanish word for sulfur, azufre. The volcano is considered semi-dormant but there are numerous fumaroles in the summit crater. The summit of the volcano has an altitude of 4,070 metres (13,350 ft), and the north-western side of the crater contains a crescent-shaped lake named Laguna Verde at 3,970 m (13,025 ft). The lake is 1,100 m (0.68 mi) long and 600 metres (2,000 ft) wide. and its bright green color is a result of the sulfur and iron-based deposits in the crater. There are also two other much smaller lakes in the crater, Laguna Negra and Laguna Cristal.
A landslide dam or barrier lake is a natural damming of a river by some kind of landslides, such as debris flows and rock avalanches, or by volcanic eruptions. If the damming landslides are caused by an earthquake, it may also be called a quake lake. Some landslide dams are as high as the largest existing artificial dam.
Elkaduwa is a village in Sri Lanka. It is located within Matale District, Central Province.There are two roads to reach Elkaduwa. One is from Ukuwela (Matale), the other one is from Wattegama (Kandy).
Hunnas waterfall, also known as Hunnasgiriya falls, is located about 22 kilometres (14 mi) from Kandy, Sri Lanka. It is located in Matale District near the village of Elkaduwa. There are two roads to reach Hunnas waterfall, one is coming from Matale to Elkaduwa, the other is Wattegama (Kandy) to Elkaduwa.
Lake Meke is a volcanic crater lake composed of two nested lakes located in Konya Province, central Turkey. It is a registered natural monument of the country and a Ramsar site.
A volcanic crater lake is a lake in a crater that was formed from explosive activity or collapse during a volcanic eruption.
Little Lake is a lake located in Door County, Wisconsin. The lake is found on Washington Island in Green Bay of Lake Michigan. Little Lake has a surface area of 41 acres (0.17 km2) and a max depth of 6 ft (1.8 m). Most of the lake is shallow and has a bottom that is muck. Although the northwest corner of the lake is only 250 ft (76 m) from Lake Michigan, the lake is spring fed. It is a recursive lake, due to it being a lake on an island. The shore around the lake is partially owned by the Door County Land Trust. This area is designated as a Wisconsin State Natural Area by the Wisconsin Department of Natural Resources.