Posts

Mapping Lake Topography.

Image
Lake topography , or bathymetry , refers to the underwater contour and physical shape of a lake bed. The Key Features of Lake Topography are Contour Lines: Lines on a map that connect points of equal depth. Close lines mean a steep drop-off; wide lines mean a flat bottom. Points: Tongues of land or underwater ridges extending from the shore into the lake. Humps: Raised areas or underwater islands rising from the lake floor. Saddles: Lower, depressed pathways or troughs situated between two separate humps or high spots. Channels: Original river or creek beds submerged when a reservoir or lake formed, usually marking the deepest path. Flats: Broad, shallow, and level areas where depth changes very slowly Some Tools for Mapping Lake Topography include: Navionics Chart Viewer: A popular digital mapping tool providing detailed depth contours and underwater terrain data. i-Boating Navigation App: Offers electronic navigational and fishing charts with bathymetric details. US Topo Maps : Pro...
Post a Comment
Read more

A view of the Lake Titicaca, the world's highest navigable lake, Bolivia.

Image
  The highest commercially navigable lake in the world. In the central part of the Andes, on the borders of Peru and Bolivia, there Ües at an altitude near 3800 m an inland drainage plateau known as the Altiplano. The Lake Titicaca constitutes a freshwater resource for approximately 2.5-3.0 million persons residing in. Peru and Bolivia. The Lake Titicaca is the highest commercially navigable lake in the world, sitting at an altitude of approximately 3,810 meters (12,500 feet) in the Andes on the border of Peru and Bolivia. Surface Area: About 8,400 square kilometers (3,240 square miles). Depth: Reaches a maximum depth of 288 meters (945 feet) with a mean depth of around 135 to 139 meters. Volume: Approximately 930 cubic kilometers. Divisions: Split into two main sub-basins, Lago Mayor (the larger northern body) and Lago Menor (the smaller southern body), connected by the Tiquina Strait.
Post a Comment
Location: Lake Titicaca
Read more

A view of the Lake Tanganyika, the world's longest freshwater lake, Tanzania.

Image
  The world's longest freshwater lake. East African Lake Tanganyika is probably best known among biologists for its speciose and highly diverse flock of cichlid fishes.  The Lake Tanganyika is an ancient African Great Lake and the longest freshwater lake in the world , stretching approximately 673 kilometers (418 miles) north-to-south. Located in the Western Rift Valley of East Africa, it holds roughly 17% of the world’s unfrozen surface fresh water and is shared by four countries: Tanzania (46%), the Democratic Republic of the Congo (40%), Burundi, and Zambia. Massive Biodiversity: It is a global hub for evolution. The lake houses over 2,000 species of plants and animals, including more than 250 species of colorful cichlid fish, 98% of which are completely endemic (found nowhere else on Earth). Anoxic Depths: Because of its extreme depth and lack of seasonal temperature mixing (a trait known as being a meromictic lake), there is no oxygen below roughly 200 meters. This creat...
Post a Comment
Location: Tanzania
Read more

A view of the Dead Sea, the world's lowest-elevation point, Israel.

Image
  The Dead Sea is a landlocked salt lake bordered by Israel and the West Bank to the west and Jordan to the east, sitting at the lowest elevation on Earth at over 430 meters (1,400 feet) below sea level. Lowest Point: The shoreline is the lowest dry land on Earth. High Salinity: It is nearly 10 times saltier than the ocean, which makes it impossible to sink and allows people to easily float. Name Origin: High salt levels prevent fish, plants, and other life from growing, hence the name "Dead" Sea.
Post a Comment
Location: Israel
Read more

A glimpse of the Caspian Sea, the world's largest saltwater lake, Kazakhstan.

Image
  About the world's largest saltwater lake . The Caspian Sea is the world's largest saltwater lake (and largest inland body of water), and it is bordered by Kazakhstan along its northeastern and eastern shore The Caspian Sea is the largest saltwater lake in the world by both surface area and volume. Surface Area: About 371,000 square kilometers (143,200 square miles). Maximum Depth: 1,025 meters (3,360 feet). Bordering Countries: Russia, Kazakhstan, Turkmenistan, Iran, and Azerbaijan. Salinity: It is brackish in the north near river inflows and saltier in the south.
Post a Comment
Location: Kazakhstan
Read more

A view of the Lake Eyre, the largest lake in Australia.

Image
Covering roughly 9,500 square kilometers (3,668 square miles) when full. The lake is Located in South Australia, about 700 kilometers north of Adelaide. The Kati Thanda-Lake Eyre is the largest lake in Australia in its dry state and a vast shallow inland sea when it fills with water after significant rainfall. When full it attracts millions of waterbirds within weeks as a vast ecological event unfolds across the remote outback. Scenic flights over Lake Eyre from William Creek or Marree provide the finest view of the extraordinary lake. Type: Ephemeral salt lake (usually a dry salt crust). The lake Sits 15 meters below sea level, making it the lowest natural point in Australia. The lake eyre Fills completely only a few times a century after heavy outback rains .
Post a Comment
Location: Lake Eyre, South Australia 5733, Australia
Read more

The Lake Baikal Holds about 20% of the world's unfrozen surface freshwater.

Image
The largest lake in Russia by volume and depth is Lake Baikal in Siberia, while the Caspian Sea is the largest by surface area. The Lake Baikal. Located in Southern Siberia, between Irkutsk Oblast and the Republic of Buryatia, its Depth Reaches a maximum depth of 1,642 meters (5,387 feet), making it the deepest lake on Earth . The Lake Baikal Holds about 20% of the world's unfrozen surface freshwater , more than all the North American Great Lakes combined. The Age of the lake is estimated at 25 to 30 million years, making it the oldest major lake in geological history .
Post a Comment
Location: Lake Baikal, Russia
Read more