View of the lake from the lake's Isla del Sol
|Primary inflows||27 rivers|
|Primary outflows||Desaguadero River
|Catchment area||58,000 km2 (22,400 sq mi)|
|Max. length||190 km (118 mi)|
|Max. width||80 km (50 mi)|
|Surface area||8,372 km2 (3,232 sq mi)|
|Average depth||107 m (351 ft)|
|Max. depth||281 m (922 ft)|
|Water volume||893 km3 (214 cu mi)|
|Residence time||1343 years|
|Shore length1||1,125 km (699 mi)|
|Surface elevation||3,812 m (12,507 ft)|
|Islands||42+ (see article)|
|Designated||26 August 1998|
|1 Shore length is not a well-defined measure.|
Lake Titicaca (Spanish: Lago Titicaca, Quechua: Titiqaqa Qucha) is a large, deep lake in the Andes on the border of Bolivia and Peru. By volume of water and by surface area, it is the largest lake in South America. Lake Maracaibo has a larger surface area, but it is a tidal bay, not a lake.
It is often called the "highest navigable lake" in the world, with a surface elevation of 3,812 metres (12,507 ft). Although this refers to navigation by large boats, it is generally considered to mean commercial craft. For many years the largest vessel afloat on the lake was the 2,200-ton, 79-metre (259 ft) SS Ollanta. Today the largest vessel is most likely the similarly sized, but broader, train barge/float Manco Capac, operated by PeruRail (berthed, as of 17 June 2013, at , across the pier from the Ollanta). Numerous smaller bodies of water around the world are at higher elevations.
The lake is located at the northern end of the endorheic Altiplano basin high in the Andes on the border of Peru and Bolivia. The western part of the lake lies within the Puno Region of Peru, and the eastern side is located in the Bolivian La Paz Department.
The lake is composed of two nearly separate sub-basins connected by the Strait of Tiquina, which is 800 m (2,620 ft) across at the narrowest point. The larger sub-basin, Lago Grande (also called Lago Chucuito), has a mean depth of 135 m (443 ft) and a maximum depth of 284 m (932 ft). The smaller sub-basin, Wiñaymarka (also called Lago Pequeño, "little lake"), has a mean depth of 9 m (30 ft) and a maximum depth of 40 m (131 ft). The overall average depth of the lake is 107 m (351 ft).
Five major river systems feed into Lake Titicaca. In order of their relative flow volumes these are Ramis, Coata, Ilave, Huancané, and Suchez. More than twenty other smaller streams empty into Titicaca. The lake has 41 islands, some of which are densely populated.
Having only a single season of free circulation, the lake is monomictic, and water passes through Lago Huiñaimarca and flows out the single outlet at the Río Desaguadero, which then flows south through Bolivia to Lake Poopó. This only accounts for about 10% of the lake's water balance. Evapotranspiration, caused by strong winds and intense sunlight at high altitude, balances the remaining 90% of the water loss. It is nearly a closed lake.
Since 2000 Lake Titicaca has experienced constantly receding water levels. Between April and November 2009 alone the water level dropped by 81 cm (32 in), reaching the lowest level since 1949. This drop is caused by shortened rainy seasons and the melting of glaciers feeding the tributaries of the lake. Water pollution is also an increasing concern because cities in the Titicaca watershed grow, sometimes outpacing solid waste and sewage treatment infrastructure. According to the Global Nature Fund (GNF), Titicaca's biodiversity is threatened by water pollution and the introduction of new species by humans. Already in 2012, the GNF nominated the lake "Threatened Lake of the Year".
The cold sources and winds over the lake give it an average surface temperature of 10 to 14 °C (50 to 57 °F). In the winter (June – September), mixing occurs with the deeper waters, which are always between 10 to 11 °C (50 to 52 °F).
Neither the protohistoric nor prehistoric name for Lake Titicaca is currently known. Given the various Native American groups that occupied the Lake Titicaca region, it is likely that it lacked a single, commonly accepted name in prehistoric times and at the time the Spaniards arrived.
The terms titi and caca can be translated in multiple ways. In Aymara, titi can be translated as either puma, lead, or a heavy metal. The word caca (kaka) can be translated as white or gray hairs of the head and the term k’ak’a can be translated as either crack or fissure or, alternatively, comb of a bird. According to Weston La Barre, the Aymara considered in 1948 that the proper name of the lake is titiq’aq’a, which means gray discolored, lead-colored puma. This phrase refers to the sacred carved rock found on the Island of the Sun. In addition to names including the term titi and/or caca, Lake Titicaca was also known as Chuquivitu in the sixteenth century. This name can be loosely translated as lance point. This name survives in modern usage in which the large lake is occasionally referred to as Lago Chucuito.
Stanish argues that the logical explanation for the origin of the name Titicaca is a corruption of the term thakhsi cala, which is the fifteenth- to sixteenth-century name of the sacred rock on the Island of the Sun. Given the lack of a common name for Lake Titicaca in the sixteenth century, it is argued that the Spaniards used the name of the site of the most important indigenous shrine in the region, thakhsi cala on the Island of the Sun, as the name for the lake. In time and with usage, this name developed into Titicaca.
Locally, the lake goes by several names. The small lake to the south is called Huiñamarca. The large lake also is occasionally referred to as Lago Mayor, and the small lake as Lago Menor. In addition, the southeast quarter of the lake is separate from the main body (connected only by the Strait of Tiquina), and the Bolivians call it Lago Huiñaymarca (also Wiñay Marka, which in Aymara means The Eternal City) and the larger part Lago Chucuito. In Peru, these smaller and larger parts are referred to as Lago Pequeño and Lago Grande, respectively.
Lake Titicaca is home to more than 530 aquatic species.
The lake holds large populations of water birds and was designated as a Ramsar Site on August 26, 1998. Several threatened species such as the huge Titicaca water frog and the flightless Titicaca grebe are largely or entirely restricted to the lake, and the Titicaca orestias has likely become extinct (last seen in 1938) due to competition and predation by the introduced rainbow trout and the silverside Odontesthes bonariensis. In addition to the Titicaca orestias, native fish species in the lake's basin are other species of Orestias, and the catfish Trichomycterus dispar, T. rivulatus and Astroblepus stuebeli (the last species not in the lake itself, but in associated ecosystems). The many Orestias species in Lake Titicaca differ significantly in both habitat preference and feeding behavior. About 90% of the fish species in the basin are endemic, including 23 species of Orestias that only are found in the lake. In addition to the threatened Titicaca grebe, some of the birds associated with water at Titicaca are the white-tufted grebe, Puna ibis, Chilean flamingo, Andean gull, Andean lapwing, white-backed stilt, greater yellowlegs, snowy egret, black-crowned night-heron, Andean coot, common gallinule, plumbeous rail, various ducks, wren-like rushbird, many-colored rush-tyrant and yellow-winged blackbird.
Titicaca is home to 24 described species of freshwater snails (15 endemics, including several tiny Heleobia) and less than half a dozen bivalves (all in family Sphaeriidae), but in general these are very poorly known and their taxonomy is in need of a review. The lake also has an endemic species flock of amphipods consisting of 11 Hyalella (an additional Titicaca Hyalella species is non-endemic).
Reeds and other aquatic vegetation is widespread in Lake Titicaca. Totora reeds grow in water shallower than 3 m (9.8 ft), less frequently to 5.5 m (18 ft), but macrophytes, notably Chara and Potamogeton, occur down to 10 m (33 ft). In sheltered shallow waters, such as the harbour of Puno, Azolla, Elodea, Lemna and Myriophyllum are common.
The Tinajani Basin, in which Lake Titicaca lies, is an intermontane basin. This basin is a pull-apart basin created by strike-slip movement along regional faults starting in the late Oligocene and ending in the late Miocene. The initial development of the Tinajani Basin is indicated by volcanic rocks, which accumulated between 27 and 20 million years ago within this basin. They lie upon an angular unconformity which cuts across pre-basin strata. Lacustrine sediments of the Lower Tinajani Formation, which are exposed within the Tinajani Basin, demonstrate the presence of a pre-Quaternary, ancestral Lake Titicaca within it between 18 and 14 million years ago. Little is known about the prehistory of Lake Titicaca between 14 million years ago and 370,000 BP because the lake sediments dating to this period lie buried beneath the bottom of Lake Titicaca and have not yet been sampled by continuous coring.
The Lake Titicaca drilling project recovered a 136-m-long drill core of sediments from the bottom of Lake Titicaca at a depth of 235 m and at a location just east of Isla del Sol. This core contains a continuous record of lake sedimentation and paleoenvironmental conditions for Lake Titicaca back to about 370,000 BP. For this period of time, Lake Titicaca was typically fresher and had higher lake levels during periods of expanded regional glaciation that corresponded to global glacial periods. During periods of reduced regional glaciation that corresponded to global interglacial periods, Lake Titicaca had typically low lake levels.
Lacustrine sediments and associated terraces provide evidence for the past existence of five major prehistoric lakes that occupied the Tinajani Basin during the Pliocene and Pleistocene. Within the northern Altiplano (Tinajani Basin), these prehistoric lakes were Lake Mataro at an elevation of 3,950 m, Lake Cabana at an elevation of 3,900 m, Lake Ballivián at an elevation of 3,860 m, Lake (North) Minchin at an elevation of 3,825 m, and Lake (North) Tauca at an elevation 3,815 m. The age of Lake Mataro is uncertain—it may date back to the Late Pliocene. Lake Cabana possibly dates to the Middle Pleistocene. Lake Ballivián existed between 120,000 and 98,000 BP. Two high lake stands, between 72,000 – 68,000 BP and 44,000 – 34,000 BP, have been discerned for Lake Minchin within the Altiplano. Another ancient lake in the area is Ouki. The high lake levels of Lake Tauca have been dated as having occurred between 18,100 and 14,100 BP.
Lake Titicaca has a borderline Subtropical highland/Alpine climate with cool to cold temperatures for most of the year. The average annual precipitation is 610 mm (24 in.) mostly falling in summer thunderstorms. Winters are dry with very cold nights and mornings and warm afternoons. Below are the average temperatures of the town Juliaca in the northern part of the lake.
|Climate data for Puno, Peru (1961–1990)|
|Average high °C (°F)||16.7
|Average low °C (°F)||3.6
|Average precipitation mm (inches)||133.3
|Source: Hong Kong Observatory,|
The "Floating Islands" are small manmade islands constructed by the Uros (or Uru) people from layers of cut totora, a thick buoyant reed that grows abundantly in the shallows of Lake Titicaca. The Uros harvest the reeds that naturally grow on the lake's banks to make the islands by continuously adding reeds to the surface.
According to legend, the Uru people originated in the Amazon and migrated to the area of Lake Titicaca in the pre-Columbian era, where they were oppressed by the local population and were unable to secure land of their own. They built the reed islands, which could be moved into deep water or to different parts of the lake as necessary, for greater safety from their hostile neighbors on land.
Golden in color, many of the islands measure about 15 by 15 metres (50 by 50 ft), and the largest are approximately half the size of a football field. Each island contains several thatched houses, typically belonging to members of a single extended family. Some of the islands have watchtowers and other buildings, also constructed of reeds.
Historically, most of the Uros islands were located near the middle of the lake, about 14 km (9 mi) from the shore; however, in 1986, after a major storm devastated the islands, many Uros rebuilt closer to shore. As of 2011[update], about 1,200 Uros lived on an archipelago of 60 artificial islands, clustering in the western corner of the lake near Puno, Titicaca's major Peruvian port town. The islands have become one of Peru's tourist attractions, allowing the Uros to supplement their hunting and fishing by conveying visitors to the islands by motorboat and selling handicrafts.
Amantani is another small island on Lake Titicaca populated by Quechua speakers. About 4,000 people live in ten communities on the roughly circular 15 square kilometers (6 sq mi) island. There are two mountain peaks, called Pachatata (Father Earth) and Pachamama (Mother Earth), and ancient ruins on the top of both peaks. The hillsides that rise up from the lake are terraced and planted with wheat, potatoes, and vegetables. Most of the small fields are worked by hand. Long stone fences divide the fields, and cattle and sheep graze on the hillsides.
There are no cars on the island and no hotels. Since machines are not allowed on the island, all agriculture is done by hand. A few small stores sell basic goods, and there is a health clinic and 6 schools. Electricity was produced by a generator and provided limited power a couple of hours each day, but with the rising price of the petroleum, they no longer use the generator. Most families use candles or flashlights powered by batteries or hand-cranks. Small solar panels have recently been installed on some homes.
Some of the families on Amantani open their homes to tourists for overnight stays and provide cooked meals, arranged through tour guides. The families who do so are required to have a special room set aside for the tourists and must fit a code by the tourist companies that help them. Guests typically take food staples (cooking oil, rice, etc. but no sugar products, as they have no dental facilities) as a gift or school supplies for the children on the island. They hold nightly traditional dance shows for the tourists where they offer to dress them up in their traditional clothes and participate.
Taquile is a hilly island located 45 kilometers east of Puno. It is narrow and long and was used as a prison during the Spanish Colony and into the 20th century. In 1970 it became property of the Taquile people, who have inhabited the island since then (current population around 2,200). The taquiean Island is 5.5 by 1.6 km in size (maximum measurements), with an area of 5.72 km². The highest point of the island is 4,050 meters above sea level and the main village is at 3,950 m. Pre-Inca ruins are found on the highest part of the island, and agricultural terraces on hillsides. From the hillsides of Taquile you have a view over the white snow tops of the Bolivian mountains. The inhabitants, known as Taquileños, are southern Quechua speakers.
Life on Taquile is still largely unchanged by mainland modernities. There are no cars on the island and no hotels and a few small stores sell basic goods. Most families use candles or flashlights powered by batteries or hand-cranks. Small solar panels have recently been installed on some homes. On clear nights, Taquile is a perfect place for star gazing and you furthermore experience much lightning in the horizon due to electric activity in the area.
Culture is very much alive on Taquile, which can be seen in the traditional clothes everyone wears. Taquile is especially known for its handicraft tradition which is regarded as among the highest quality handicrafts not only in Peru but in the world. "Taquile and Its Textile Art" were honored by being proclaimed "Masterpieces of the Oral and Intangible Heritage of Humanity" by UNESCO. Knitting is exclusively performed by males, starting at age eight. The women exclusively make yarn and weave.
Taquileans are also known for having created an innovative, community-controlled tourism model, offering home stays, transportation, and restaurants to tourists. Ever since tourism started coming to Taquile in the seventies the taquleans have slowly lost control over the mass day-tourism operated by non-Taquileans. The Taquileans have thus developed alternative tourism models, including lodging for groups, cultural activities and local guides, who have recently completed a 2-year training program. Furthermore, the local Travel Agency Munay Taquile has been established to regain control over tourism.
The people in Taquile run their society based on community collectivism and on the Inca moral code ama sua, ama llulla, ama qhilla, (do not steal, do not lie, do not be lazy). The island is divided into six sectors or suyus for crop rotation purposes. The economy is based on fishing, terraced farming horticulture based on potato cultivation, and tourist-generated income from the approximately 40,000 tourists who visit each year.
Isla del Sol
Situated on the Bolivian side of the lake with regular boat links to the Bolivian town of Copacabana, Isla del Sol ("Island of the sun") is one of the largest islands of the lake. Geographically, the terrain is harsh; it is a rocky, hilly island. There are no motor vehicles or paved roads on the island. The main economic activity of the approximately 800 families on the island is farming, with fishing and tourism augmenting the subsistence economy.
There are over 180 ruins on the island. Most of these date to the Inca period circa the 15th century AD. Many hills on the island contain agricultural terraces, which adapt steep and rocky terrain to agriculture. Among the ruins on the island are the Sacred Rock, a labyrinth-like building called Chicana, Kasa Pata, and Pilco Kaima. In the religion of the Incas, it was believed that the sun god was born here.
During 1987-92 Johan Reinhard directed underwater archaeological investigations off of the Island of the Sun, recovering Inca and Tiahuanaco offerings. These artifacts are currently on display in the site museum of the village of Challapampa.
Isla de la Luna
Isla de la Luna is situated east from the bigger Isla del Sol. Both islands belong to the La Paz Department of Bolivia. According to legends that refer to Inca mythology Isla de la Luna (Spanish for "island of the moon") is where Viracocha commanded the rising of the moon. Ruins of a supposed Inca nunnery (Mamakuna) occupy the oriental shore.
Archaeological excavations indicate that the Tiwanaku peoples (ca. AD 650-1000) built a major temple on the Island of the Moon. Pottery vessels of local dignitaries dating from this period have been excavated on islands in Lake Titicaca. Two of them were found in the nineteenth century and are now in the British Museum in London. The structures seen on the island today were built by the Inca (ca. 1450–1532) directly over the earlier Tiwanaku ones.
Suriki lies in the Bolivian part of lake Titicaca (in the southeastern part also known as lake Wiñaymarka).
Suriki is thought to be the last place where the art of reed boat construction survives, at least as late as 1998. Craftsmen from Suriqui helped Thor Heyerdahl in the construction of several of his projects, such as the reed boats Ra II and Tigris, and a balloon gondola.
The lake has had a number of steamships, each of which was built in the United Kingdom in "knock down" form with bolts and nuts, disassembled into many hundreds of pieces, transported to the lake, and then riveted together and launched.
In 1862 Thames Ironworks on the River Thames built the iron-hulled sister ships SS Yavari and SS Yapura under contract to the James Watt Foundry of Birmingham. The ships were designed as combined cargo, passenger and gunboats for the Peruvian Navy. After several years' delay in delivery from the Pacific coast to the lake, Yavari was launched in 1870 and Yapura in 1873. Yavari was 30 metres (100 ft) long but in 1914 her hull was lengthened for extra cargo capacity and she was re-engined as a motor vessel. During the last days of the War of the Pacific Chile was sending a warship on railroad to Titicaca Lake in order to disrupt trade.
In 1905 Earle's Shipbuilding at Kingston upon Hull on the Humber built SS Inca. By now a railway served the lake so the ship was delivered in kit form by rail. At 67 metres (220 ft) long and 1,809 tons Inca was the lake's largest ship thus far. In the 1920s Earle's supplied a new bottom for the ship, which also was delivered in kit form.
Trade continued to grow, so in 1930 Earle's built SS Ollanta. Her parts were landed at the Pacific Ocean port of Mollendo and brought by rail to the lake port of Puno. At 79 metres (260 ft) long and 2,200 tons she was considerably larger than the Inca, so first a new slipway had to be built to build her. She was launched in November 1931.
In 1975 Yavari and Yapura were returned to the Peruvian Navy, who converted Yapura into a hospital ship and renamed her BAP Puno. The Navy discarded Yavari but in 1987 charitable interests bought her and started restoring her. She is now moored at Puno Bay and provides static tourist accommodation while her restoration continues. Coya was beached in 1984 but restored as a floating restaurant in 2001. Inca survived until 1994 when she was broken up. Ollanta is no longer in scheduled service but PeruRail has been leasing her for tourist charter operations.
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