Lake Urmia is a hypersaline lake located in Iran. Formerly the largest saltwater lake in the Middle East, covering over 2,000 square miles, Lake Urmia has shrunk to only 10 per cent or its original size and now holds only five per cent of the water it once had. The reasons for this dramatic water loss are many: the 13 rivers entering the lake have been dammed; increased groundwater pumping has reduced flows into the lake; water diversions; climate change and drought. Unfortunately for the people of Iran, if Lake Urmia vanishes, so will the tourism it attracts, and the lake’s marshes will dry up too, no longer supporting 226 species of birds and many other animals. But Lake Urmia may survive at least somewhat; Iranian officials are working to persuade neighboring countries such as Armenia and Azerbaijan to divert water to help refill this dwindling water resource. List of drying lakes. From Wikipedia, the free encyclopedia. A number of lakes throughout the world are drying or completely dry due to irrigation or urban use diverting inflow Photo about Webb Lake on the Babcock Webb WMA shows the extent of the severe drought conditions in Charlotte County and elsewhere in Southwest Florida. Image of season, arid, hazard - 9350634 Home > reviews > Sports & Entertainment > dry lake. (Ship from US) 2019 12pcs/set Various Dry Fly Fishing Lure Trout Salmon Dry Flies Fish Hook Lures fishing fishing Chain with Bird Teaser #py6
Lake Baikal in Russia at 5,387 feet deep is the world's deepest lake. It is around 2,000 feet deeper than the Caspian Sea which is 3rd Drought and new Three Gorges Dam blamed as fishers forced to seek other work and freight trade comes to a halt
Body Lotion for Dry Sky, 365 . The lake supports numerous plants and animals and people, and particularly attractive are its tropical fish. However, the productivity of the lake has declined since the 1800s. Anyway, unlike an endorheic lake, Lake Tanganyika has a large inflow and outflow of water. However, in the past, the lake had no outflow, because of changing geological conditions, thus making it partly endorheic. At present, Lake Tanganyika has an outflow through the Lunkuga and Congo Rivers; but this could change if water is diverted from the inflow of the lake, thus lowering its level so the rivers can't drain it. Then the eventual demise of Lake Tanganyika could happen within decades or even years. Lake Region Electric Cooperative
This lake in west-central Bolivia occupies a shallow depression in the Altiplano, or high plateau, at 12,090 feet (3,686 meters) above sea level. Historically the country’s second largest lake, it covered 977 square miles (2,530 square km) at low stage and was about 56 miles (90 km) long and 20 miles (32 km) wide though only 8 to 10 feet (2.4 to 3 meters) deep. By December 2015, however, the lake had completely dried up as a result of the combined effects of climate change-exacerbated drought and sediment buildup caused by the local mining industry. Since the 1990s, as the process of global warming brought increased temperatures to the region, the evaporation rate for the lake tripled. Lacking a sufficient interval of normal rainfall to replenish its waters, the lake became desiccated, resulting in catastrophic consequences for the region’s flora and fauna as well as for the people who had made a living fishing in the lake. Settlement on Lake Poopó’s shores—previously made marshy by filtration of water into the lake bed—had long been sparse, but the disappearance of the lake forced many people to relocate. An international environmental research centre has been set up on Lake Baikal. The international organisation Greenpeace is also doing much to preserve the environment A number of lakes throughout the world are drying or completely dry due to irrigation or urban use diverting inflow. Climate change is also a factor in drying some lakes. In 1990, a 13 miles long ancient Hindu Symbol Sri Yantra suddenly appear in a remote dry lake bed in Oregon, near the Idaho border
The drying lake has caused another concerning issue: poisonous air. The Great Salt Lake is full of toxic arsenic, selenium and mercury, with levels so high they Great Salt Lake drying up Inhabitat 17 NASA before and after images devoted to the planet's surface transformations: 1. Drying lakes. Poopó is Bolivia's second-largest lake and has always been an important fishing resource for its local.. When we use more water than is naturally put back into the system, we draw down the overall supply. That simple equation is the brutal reality the following dried up lakes, rivers and seas. A fisherman tries to paddle his boat through a small stream amid the partially dried-up Honghu Lake in Honghu, Hubei province. Photo: R. Read full article
All that water has to come from somewhere, and it shouldn't be surprising to learn that there are a lot of places around the world that are literally drying up (like the Aral Sea, seen here). It's never been harder to be a large body of water. In the face of warming temperatures caused by climate change on top of increased demand, some of the world's largest lakes, rivers and seas are growing smaller with every season. Check out Dry-Lake's art on DeviantArt. Browse the user profile and get inspired. Paint a picture. Experiment with DeviantArt's own digital drawing tools. Dry-Lake Excellent insight into the worlds greatest unfortunately unrepairable horrors, because that is what this water resource destruction will be. Rivers, lakes and aquifers are drying up or becoming too polluted to use. More than half the world's wetlands have disappeared. Agriculture consumes more water than any other source and wastes..
MOREOwlcationSign InJoin 7 Owlcation»STEM»Ecology 15 Worst Drying Lakes in the WorldUpdated on October 6, 2019 Kelley Marks moreEnvironmental issues are a major interest of Kelley's, especially pollution, climate change, deforestation and endangered species. Farklı kategorilerden olan ilanlar karşılaştırılamaz! Dilerseniz karşılaştırma adımına devam edebilir ya da eklediğiniz ilanları çıkartıp yeni bir karşılaştırma listesi oluşturabilirsiniz. Beautiful Lake Titicaca, lying between Peru and Bolivia, is perched atop the Andean Altiplano at over 12,000 feet in elevation; it is the largest lake in South America and has a surface area of over 3,200 square miles. Although the lake doesn’t seem in eminent danger of drying up, its water level has decreased since 2000, because rainy seasons have grown shorter and glaciers in the area are shrinking, reducing flows into the lake. Moreover, the lake has only two types of outflow: the Desaquadero River and evaporation, the latter of which accounting for 90 per cent of its water loss. So, if the river dries up, the lake will become a closed one, similar to many others on this list, and could eventually become another fetid, hypersaline mud hole. Also suffering from water pollution, the Global Nature Fund in 2012 labeled it the “Threatened Lake of the Year.” It seems safe to suggest that if Lake Titicaca begins drying up to a great degree, the entire world may panic!One of the largest man-made lakes in the world, Lake Mead is the reservoir of Hoover Dam, on the Arizona-Nevada border 25 miles (40 km) east of Las Vegas. Formed by the damming of the Colorado River, Lake Mead extends 115 miles (185 km) upstream, is 1 to 10 miles (1.6 to 16 km) wide, and has a capacity of 31,047,000 acre-feet (38,296,200,000 cubic meters) with 550 miles (885 km) of shoreline and a surface area of 229 square miles (593 square km). It was named after Elwood Mead, commissioner of the Bureau of Reclamation (1924–36). As a result of a multiyear drought in the American Southwest during the early 21st century, the lake level dropped some 120 feet (37 meters) between 2000 and 2015, satellites revealed. Find 8 synonyms for dry lakes and other similar words that you can use instead from our thesaurus.. Plural for a remnant of lake consisting of fine-grained sediments infused with alkali salts
The Dried Lake, The Dried Lake[L34]. Helena. Shield, Amulet. The Dried Lake, The Dried Lake[L34]. Jun. (81-85)% increased Physical Damage (13-15)% chance to Impale Enemies on Hit.. . List of drying lakes. 67 VIEWS. Read. Edit Lake Valor (Japanese: リッシこ Risshi Lake) is a location in the Sinnoh region. Here, Team Galactic's Commander Saturn is battled for the first time. Within the cave in the center of the lake resides the Legendary Pokémon Azelf
A breathtaking timelapse of Folsom Lake in California shows the dramatic effects a four-year drought is having on An empty boat marina at Folsom Lake in January 2014 © Robert Galbraith © R Ultra Bee Dry comes in a 50 lb. bag and helps increase brood production and yeild healthier, stronger bees. No animal by-products are used Bordered by Israel and Jordan, the Dead Sea, more than 1,400 feet below sea level, is the lowest point on land in the world. This hypersaline body of water supports little life, therefore its name. However, though dead, the water has attracted tourists for thousands of years. About 2,000 years ago, Herod the Great came here to partake of its reputed healthy water. Another terminal lake, with no outlet, salt and minerals have been building up in the Dead Sea for two million years, making it a source of salt, asphalt and potash. Unfortunately, the Dead Sea has shrunk dramatically in current times, mainly because the flow of the Jordan River, the main source of water for the Dead Sea – other than scant rainfall – has been reduced for agricultural use.
Who we are. The Dry Lakes Racers Australia are the official sanctioning body for dry lakes racing in Australia. We conduct an annual event called Speed Week at Lake Gairdner in South Australia.. Category:Dry lakes. From Wikimedia Commons, the free media repository. dry lake. basin or depression that formerly contained a standing surface water body Dry lakes are typically formed in semi-arid to arid regions of the world. The largest concentration of Most dry lakes are small, however Salar de Uyuni in Bolivia, near Potosí, the largest salt flat in the..
Lake Poopo dries up. Boats of fishermen are seen on the Poopo lakebed in the Oruro Department, south of La Paz, Bolivia, December 17, 2015 The world's saltwater lakes are drying up and scientists have long suspected climate change was to blame. Now, a study reveals another potential culprit: thirsty humans. According to more than 170.. Dry lake synonyms, Dry lake pronunciation, Dry lake translation, English dictionary definition of Dry lake. n. A nearly level area at the bottom of an undrained desert basin, sometimes temporarily..
Hydrological drought. This happens when reservoirs and lakes dry up and all resources become short to the land. This is because there is water stored in an area such as in a lake or reservoir Definition of DRY LAKE in the Definitions.net dictionary. Information and translations of DRY LAKE in the most comprehensive dictionary definitions resource on the web Kumiva Dry Lake 146 km. Eagle Lake 168 km. Quinn River Sink 194 km. Rye Patch Reservoir 213 km
Weather is changing around the world at a rapid rate. There are companies that pollute our rivers and streams. I am sad at what I am seeing around the world. Thanks for sharing this information, Kelley., you arrive at the overlook just below the visiting area at Dead Horse Point Smaller lakes within the Aral Sea that have stopped being fed by river flows tend to have higher To sum up, drying of the Aral Sea is very big problem, and that's to say it became national trouble for.. Lake Victoria, the source of the White Nile, and dozens of other critical freshwater supplies across Africa could be reduced to swamps within decades unless action is taken to save them, the United
Located in Jiangxi Province in southeastern China, Poyang Lake is the largest fresh water lake in China. In the recent past, Poyang Lake used to cover as much as 1,400 square miles, though as recently as 2012 it covered only about 77 square miles, and in 2016 it nearly dried up entirely. Drought, sand quarrying and storage for the Three Gorges Dam are responsible for this dramatic shrinking of the lake’s surface area. There’s a plan to build a dam so the lake’s level can be maintained more easily, but this construction could have devastating effect for local wildlife, particularly the Chinese finless porpoise, which is near extinction. Notably, the lake is considered a kind of Chinese Bermuda Triangle, because scores of ships have disappeared while sailing upon it, including a Japanese naval vessel carrying 200 sailors during WW II! A number of lakes throughout the world are drying or completely dry due to irrigation or urban use diverting inflow. I also saw that they resembled the desiccation cracks that we see on Earth in dried up lakes, he said. These are the same type of patterns you see when mud dries out in your back yard, but the stresses.. Exposed by dry weather: The drought affecting Texas has uncovered several historical sites, including this tanks that was once part Other depleted lakes across Texas are revealing much older artifacts Lake Chad is a freshwater lake in the Sahelian zone of west-central Africa at the conjunction of Chad, Cameroon, Nigeria, and Niger. It is located in an interior basin that was once occupied by a much larger ancient sea. Historically, the lake ranked among the largest lakes in Africa, though its surface area varies greatly by season as well as from year to year. When the surface of the lake is approximately 920 feet (280 meters) above sea level, the area is about 6,875 square miles (17,800 square km). In the early 21st century, however, the area was typically about 580 square miles (1,500 square km). Lake Chad is a variable body of water, and its surface area typically reaches its maximum in late October or early November, before shrinking by more than half by late April or early May. The volume of the lake reflects local precipitation and the discharge of its catchment area, balanced against losses through evaporation, transpiration, and seepage. The lake is fed chiefly by the Chari (Shari)-Logone river system, which accounts for about four-fifths of the inflow. Most of the remaining inflow is contributed by the Ebeji (El-Béid) and Yedseram rivers. At times when the lake has a greater surface area, it can be divided into two pools partially separated by a low ridge extending roughly northeast-southwest across the center of the lake. The ridge was formed during a drought at the beginning of the 20th century, and at times it has completely divided the basins.
Dry Lake, Dry Lake Suppliers Directory - Find variety Dry Lake Suppliers, Manufacturers, Companies from around the World at inflatable lake toys ,lake liner ,swan lake ballet tutu, Water Play Equipment Dry lake definition, a tract of land in a desert region over which a shallow lake is formed during the rainy season or after prolonged heavy rains
This was interesting but also alarming to read about these lakes which have been drying up through the years. The only one that I have personally seen is the Great Salt Lake in Utah. Ruotsalainen merkki Dry Lake luo vaatteita naisellisella ja romanttisella designilla ja jännittävillä vaikutteilla. Dry Lake-mekko on monien muotia rakastavien toivelistalla One example of increasing aridity in Mali appears in Lake Faguibine. Starting in the late 1980s, a drop in precipitation steadily dried the lake. Even though normal rainfall resumed after the year 2000, the.. Mother Nature Network Earth Matters All Earth Matters Animals Climate & Weather Energy Politics Space Translating Uncle Sam Wilderness & Resources Health All Health Allergies Fitness & Well-Being Healthy Spaces Lifestyle All Lifestyle Arts & Culture Natural Beauty & Fashion Recycling Responsible Living Travel Tech All Tech Computers Gadgets & Electronics Research & Innovations Transportation Money All Money Green Workplace Personal Finance Sustainable Business Practices Food & Drink All Food & Drink Beverages Healthy Eating Recipes Home All Home At Home Organic Farming & Gardening Remodeling & Design Family All Family Babies & Pregnancy Family Activities Pets Protection & Safety Mother Nature Network Earth Matters Health Lifestyle Tech Money Food & Drink Home Family Newsletters Photos Videos Quizzes Blogs About Us Contact Us MNN.com > Earth Matters > Wilderness & Resources MNN Galleries 8 lakes and rivers that are drying up By: Shea Gunther on May 20, 2016, 10:19 a.m. Tweet
According to a Human Rights Watch report, Lake Turkana is suffering under a deadly two-pronged assault. Climate change is driving up temperatures, which increases evaporation.. Dry Lake is north of Lime Lake. Overview. Map. Bing Maps. MapQuest. Type: Lake. Location: Ontario, Canada, North America. Latitude: 44.4256° or 44° 25' 32 north Found in the Sahel region of Mali and not far from the famous city of Timbuktu, Lake Faguibine, doesn’t exist much of the time, unless the Niger River, about 75 miles south, floods over, filling some small lakes to the north and eventually adding water to Lake Faguibine as well. Unfortunately, the Niger River doesn’t flood much these days, because drought has hit the Sahel since the late 1970s. Also, the Niger River had been dammed in recent years, reducing its flow. But, fortunately for farmers in the area, the soil where Lake Faguibine is – or used to be - is very fertile. So, if there’s adequate water for crops, provided by rainfall and/or the lake, people can engage in subsistence farming and raise cattle in the nearby grasslands. Therefore, if Lake Faguibine survives to some extent, people in the area may have cause for optimism.
With each dry day, receding Lake Berryessa reveals more remains of the town, once a thriving farming community before the Government claimed it for a dam and reservoir in the 1950's Located in the state of Utah of the United States of America, Great Salt Lake, aka America’s Dead Sea, is the largest salt water lake in the Western Hemisphere, though at times it’s considerably smaller than normal and covering about 1,700 square miles. Far saltier than seawater, Great Salt Lake nevertheless supports life such as brine shrimp, brine flies and numerous species of birds. Great Salt Lake is a pluvial lake and the largest section of Lake Bonneville, a fresh water paleolake that existed in the Great Basin from 14,000 to 16,000 years ago. Since the American Southwest has been drying out since the end of the Pleistocene, so have all the lakes in the Great Basin, including Great Salt Lake, which will probably survive for quite some time; but when drought and climate change are taken into account, it could eventually dry up and become the largest salt flat in the US. Before people had drying machines they washed their clothes and then dried them outside. This is possible because of evaporation (water turning from a liquid into a gas). The weather this week From Drying Lakes book. Read reviews from world's largest community for readers. This is a book about a boy and his family, living and growing and someti.. . Lawrence Waterway, including self-unloading dry-bulk carriers, gearless dry-bulk carriers and..
Next (Great Lakes region (North America)). The Great Lakes of the Laurentian Shield are a group of five large lakes in North America on or near the Canada-United States border. They are the largest group of fresh water lakes on Earth Their disappearance upsets the oxygen balance. As a result some rare species of animals, birds, fish and plants disappear forever, a number of rivers and lakes dry up. 5.The destruction of nature.. Lakes in wetter regions are relatively permanent features, but those in drier regions may be less stable and thus more Normally dry but susceptible to occasional flooding, the lake constitutes the lowest.. A lake differs from a river in the movement of the water. Rivers usually are moving or flowing in one direction along a bank on either side. A lake does not move except maybe due to the wind CVS.com® is not available to customers or patients who are located outside of the United States or U.S. territories. We apologize for any inconvenience. For U.S. military personnel permanently..
Poyang Lake, the largest freshwater lake in China, is one of them. Main reasons include diversions from the Yangtze River, a prolonged dry season, and industrial activities Thanks for the comment, Peggy Woods. I'm also alarmed by the changes to the ecosystem brought about by population stress, deforestation, climate change and pollution. Later! Download Dry lake stock photos at the best stock photography agency with millions of premium high quality, royalty-free stock photos, images and pictures at reasonable prices
Thanks for the comment, Larry W Fish. I enjoy writing about ecological issues, and the subject of dying lakes definitely fits that genre. Later! Lake Mungo is a dry lake in western New South Wales, Australia, where the oldest human remains in the continent of Australia have been found A large area of land where it is always very dry, there are few plants, and there is a lot of sand or rocks. hill. An area of land that is higher than the land around it, like a mountain but smaller Searles Dry Lake, Trona: Address, Searles Dry Lake Reviews: 4/5. As you drive through Trona, CA, Searles Lake is almost a mirage off to the East. But in reality, it is the source of minerals that are used..
A number of lakes throughout the world are drying or completely dry due to irrigation or urban use diverting inflow. Dead Sea in Palestine, Jordan, and Israel. Hamun Lake on the Irano-Afghan border Rivers and lakes dry up. One of the most recent examples is the Aral Sea, which has become much smaller due to man's activity. The Aral Sea, Lake Baikal, the Kuzbass, Semipalatinsk and Chernobyl The amount of rain, snow, or other precipitation falling on a given spot on Earth’s surface during the year depends a lot on where that spot is. Is it in a desert (which receives little rain)? Is it in a rainforest (which receives vast amounts of rain)? Or is it located somewhere between these two extremes? Often precipitation runs off along the surface back to the ocean, but it can be held for a time in lakes. Lakes in wetter regions are relatively permanent features, but those in drier regions may be less stable and thus more sensitive to changes in precipitation from season to season and water withdrawals from human activities. The list below discusses some of Earth’s lakes that belong to the second category. Clark Dry Lake in Anza-Borrego Desert State Park, Borrego Springs California. Reviews of Clark Dry Lake 13 people have reviewed this location. Ratings Summary
translation and definition dry lakes, Dictionary English-English online. Example sentences with dry lakes, translation memory. opensubtitles2. Some place called Dry Lake In the South Lakes valleys around Windermere lake, narrow winding lanes are bounded with dry stone walls and hedgerows, meandering through deciduous woodlands. Gem like lakes and musical becks.. Iran’s Lake Urmia, or Daryācheh-ye Orūmīyeh, is located in the northwestern corner of the country. It is the largest lake in the Middle East, and it has historically covered an area that varied from 2,000 to 2,300 square miles (5,200 to 6,000 square km). The lake lies in the bottom of the large central depression of the Azerbaijan region in northwestern Iran, at an elevation of 4,183 feet (1,275 meters) above sea level. The basin is surrounded by mountains in the west and north, by plateaus in the south, and by plateaus and volcanic cones in the east. At its fullest volume, in the 1970s, the lake was about 87 miles (140 km) long and 25 to 35 miles (40 to 55 km) wide, with a maximum depth of 53 feet (16 meters). Because Lake Urmia’s waters have no outlet, they are highly saline. The lake is one-fourth as salty as the Dead Sea, with a salt content ranging from 8 to 11 percent in the spring to 26 to 28 percent in the late autumn. The main salts are chlorine, sodium, and sulfates. Since 1967 it has enjoyed the status of a wetland protected region, and efforts have been made by the Iranian government to increase its wildlife. However, Lake Urmia’s surface area has declined by some 90 percent since the 1970s, to roughly 230 square miles (600 square km), from the damming of the rivers that flow into the lake. Paddling Clothing. Wetsuits. Dry Suits. Dry Bags Phenomenon: Lake Baikal is the oldest (25 million years old) and deepest (maximum depth of 1642m) lake in the world. It is also the world's largest freshwater lake, accounting for about 20% of total..
Salt Lake City, UT. San Diego, CA dry lakes. Definition from Wiktionary, the free dictionary. Jump to navigation Jump to search This is a great read and an educational one as well. It is sad that these lakes are drying up. Climate change is real, there is no doubt about it. introduced to the great lakes as early as 1830s by oceangoing vessels. o Unpleasant creature and attaches itself to the flanks of other fish and feeding parasitically on their blood o Lampreys have had.. The lake - which is situated more than 12,000 feet above sea level on the country's Andean plains - has all but dried up before due to El Nino, but had rebounded to twice the size of Los Angeles
I also saw that they resembled the desiccation cracks that we see on Earth in dried up lakes. These are the same type of patterns you see when mud dries out in your back yard, but the stresses that.. Until the lake is dry, we won't know the worth of water - Some touching inspirational quote I definitely made up myself.. Mudcracked dry lake beds and salt flats at the bottom of Death Valley A dry lake is either a basin or depression that formerly contained a standing surface water body If the floor of a dry lake is covered by deposits of alkaline compounds, it is known as an alkali flat
Lake Mead, a reservoir on the Colorado River in Nevada, has the largest capacity of water of any reservoir in the US. But since 1983 Lake Mead has shrunk because of drought and the increased water demand of southwestern states and California, reaching record lows in water level from 2010 to the present. In fact, in July 2019, Lake Mead was only 40 per cent full, holding 10.4 million acre feet of water. Nevertheless, as long as runoff from the Rocky Mountains maintain a strong outflow of water for the Colorado River, the lake probably won’t disappear any time soon, though uncertainty brought about by climate change could cause the lake to shrink even more in the coming years. Dry Lake Campground is located 8 miles northeast of Steamboat Springs on the Buffalo Pass Road. This small campground is surrounded by Aspen, Spruce and Fir trees and is in a good location to.. Apparently she had a dry lake. by Haha.Diety.Lizy August 23, 2017. 0 Crater Lake inspires awe. Native Americans witnessed its formation 7,700 years ago, when a violent eruption triggered the collapse of a tall peak. Scientists marvel at its purity..
Lake Hillier is truly stunning with its distinctive strawberry milkshake color. Lake Hillier is situated in near the coast of Middle Island in the Recherche Archipelago to the south of Western Australia Located between Kazakhstan and Uzbekistan, the Aral Sea is another endorheic lake and one of the four largest lakes in the world as recently as the 1989. Once covering an area of over 26,000 square miles, the Aral Sea is now only about 10 per cent of its original size and has split into four separate bodies of water. The main reason for this desiccation is that since the 1940s much of the water that feeds the lake has been diverted for agricultural usage, primarily to grow cotton, rice, melons and cereal. Unfortunately, this water diversion has mostly destroyed the fishing industry of the lake. Moreover, the poorly constructed irrigation canals used for the diversion have wasted 30 to 75 per cent of the diverted water. Now the Aral Sea’s remaining water is much saltier and more polluted and therefore practically useless. But the people in the area seem resigned to the fate of the Aral Sea, so it may dry up entirely any day now.Thanks for the comment, Ofer Berzak! I'm certainly in favor of re-stocking lakes with fish and other aquatic life - as long as there's enough water to support them. But during times of climate change that may not be possible for many of the lakes on this list!... Modern civilization has significantly reduced the size of the Great Salt Lake, but the authors of a new study remain optimistic that a cultural shift on the Wasatch Front could still save it Dramatic environmental change has hit Africa in recent decades, and the shrinking of Lake Chad is a primary aspect of this pending catastrophe. Once the size of the Caspian Sea, Lake Chad, located in west-central Africa, has lost about 95 per cent of its water since the 1960s. Considered an endorheic body of water (or closed hydrological system), Lake Chad is a shallow lake (30 to 40 feet deep) in an arid grassland and, at one time, covered nearly 400,000 square miles - but that was about 5000 BCE, way before recent times of drought and human expansion in sub-Saharan Africa. Consequently, the lake’s surface area has shrunk to about 520 square miles, though since 2007 its girth has rebounded somewhat, so maybe Lake Chad won’t disappear entirely any time soon. But if issues such as overuse by people, climate change and desertification are not addressed, it may vanish sooner rather than later.