Lake Maninjau
Encyclopedia
Lake Maninjau is a caldera lake
in West Sumatra
, Indonesia
. It is located 36 km to the west of Bukittinggi
, at 0°19′S 100°12′E.
was formed by a volcanic eruption estimated to have occurred around 52,000 years ago. Deposits from the eruption have been found in a radial distribution around Maninjau extending up to 50 km to the east, 75 km to the southeast, and west to the present coastline. The deposits are estimated to be distributed over 8500 km² and have a volume of 220–250 km³. The caldera has a length of 20 km and a width of 8 km.
which has a natural outlet to the west coast. Since 1983 this water has been used to generate hydroelectric power for West Sumatra, generated around 68 MW at maximum load.
Most of the people who live around Lake Maninjau are ethnically Minangkabau. Villages on the shores of the lake include Maninjau and Bayur.
Maninjau is a notable tourist destination in the region due to its scenic beauty and mild climate. It is also used as a site for paragliding
.
The lake is used for aquaculture
, using karamba floating net cages. The technique was introduced in 1992, and by 1997 there were over 2,000 cage units with over 600 households engaged. Each cage may have 3-4 production cycles each year. There is evidence of pollution around some karamba area.
On the edge of the lake, the landuse includes rice fields in the swamps and the lower slopes. The villages are bordered uphill by a large belt of forestlike tree gardens, which dissolves into the upper montane
forest on the steepest parts of the slopes up to the ridge of the caldera.
The tree gardens include three typical components:
The first President of Indonesia, Soekarno, visited the area in early June 1948. A pantun
he wrote about the lake reads:
Crater lake
A crater lake is a lake that forms in a volcanic crater or caldera, such as a maar; less commonly and with lower association to the term a lake may form in an impact crater caused by a meteorite. Sometimes lakes which form inside calderas are called caldera lakes, but often this distinction is not...
in West Sumatra
West Sumatra
West Sumatra is a province of Indonesia. It lies on the west coast of the island Sumatra. It borders the provinces of North Sumatra to the north, Riau and Jambi to the east, and Bengkulu to the southeast. It includes the Mentawai Islands off the coast...
, Indonesia
Indonesia
Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...
. It is located 36 km to the west of Bukittinggi
Bukittinggi
Bukittinggi is one of the larger cities in West Sumatra, Indonesia, with a population of over 91,000 people and an area of 25.24 km². It is situated in the Minangkabau highlands, 90 km by road from the West Sumatran capital city of Padang. It is located at , near the volcanoes Mount...
, at 0°19′S 100°12′E.
Formation
The Maninjau calderaCaldera
A caldera is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption, such as the one at Yellowstone National Park in the US. They are sometimes confused with volcanic craters...
was formed by a volcanic eruption estimated to have occurred around 52,000 years ago. Deposits from the eruption have been found in a radial distribution around Maninjau extending up to 50 km to the east, 75 km to the southeast, and west to the present coastline. The deposits are estimated to be distributed over 8500 km² and have a volume of 220–250 km³. The caldera has a length of 20 km and a width of 8 km.
The lake
Lake Maninjau has an area of 99.5 km², being approximately 16 km long and 7 km wide. The average depth is 105 m, with a maximum depth of 165 m. The natural outlet for excess water is the Antokan river, located on the west side of the lake. It is the only lake in SumatraSumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...
which has a natural outlet to the west coast. Since 1983 this water has been used to generate hydroelectric power for West Sumatra, generated around 68 MW at maximum load.
Most of the people who live around Lake Maninjau are ethnically Minangkabau. Villages on the shores of the lake include Maninjau and Bayur.
Maninjau is a notable tourist destination in the region due to its scenic beauty and mild climate. It is also used as a site for paragliding
Paragliding
Paragliding is the recreational and competitive adventure sport of flying paragliders: lightweight, free-flying, foot-launched glider aircraft with no rigid primary structure...
.
Local fishing and agriculture
Two endemic species collected from the lake for local consumption and for export to markets outside the crater are pensi, a species of small mussel, and palai rinuak, a type of small fish. One method of preparing palai rinuak is to grill a mixture of the fish along with coconut and spices, wrapped in a banana leaf.The lake is used for aquaculture
Aquaculture
Aquaculture, also known as aquafarming, is the farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants. Aquaculture involves cultivating freshwater and saltwater populations under controlled conditions, and can be contrasted with commercial fishing, which is the...
, using karamba floating net cages. The technique was introduced in 1992, and by 1997 there were over 2,000 cage units with over 600 households engaged. Each cage may have 3-4 production cycles each year. There is evidence of pollution around some karamba area.
On the edge of the lake, the landuse includes rice fields in the swamps and the lower slopes. The villages are bordered uphill by a large belt of forestlike tree gardens, which dissolves into the upper montane
Montane
In biogeography, montane is the highland area located below the subalpine zone. Montane regions generally have cooler temperatures and often have higher rainfall than the adjacent lowland regions, and are frequently home to distinct communities of plants and animals.The term "montane" means "of the...
forest on the steepest parts of the slopes up to the ridge of the caldera.
The tree gardens include three typical components:
- Fruit trees including durianDurianThe durian is the fruit of several tree species belonging to the genus Durio and the Malvaceae family . Widely known and revered in southeast Asia as the "king of fruits", the durian is distinctive for its large size, unique odour, and formidable thorn-covered husk...
, jack fruit, cempedakCempedakArtocarpus integer, known as Chempedak, chempedek or cempedak , is a species of tree and its fruit in the family Moraceae. It is native to southeast Asia, occurring from Indonesia, Malaya Peninsula to the island of New Guinea/Papua. It has been introduced to Queensland...
, rambutanRambutanThe rambutan is a medium-sized tropical tree in the family Sapindaceae, and the fruit of this tree. It is native to Vietnam, Indonesia, the Philippines, Sri Lanka, Malaysia, and elsewhere in Southeast Asia, although its precise natural distribution is unknown. It is closely related to several...
, langsat, golden berriesBaccaureaBaccaurea is a genus of flowering plant belonging to the family Phyllanthaceae. The genus comprises over 100 species, distributed from Indomalesia to the West Pacific.- Selected species :...
and water applesSyzygium samarangenseSyzygium samarangense is a plant species in the Myrtaceae, native to India, Indonesia, Malaysia, Philippines, Samoa, Sri Lanka and Thailand, and widely cultivated in the tropics...
. - Timber species including Toona sinensisToonaToona is a genus of five species of trees in the mahogany family, Meliaceae, native from Afghanistan south to India, and east to North Korea, Papua New Guinea and eastern Australia...
and Pterospermum javanicumPterospermumPterospermum is a flowering plant genus. Traditionally included in the family Sterculiaceae, it is included in the expanded Malvaceae in the APG and most subsequent systematics. Pterospermum is based on two Greek words, "Pteron" and "Sperma," meaning "winged seed."Some species are grown...
. - Spice trees including cinnamonCinnamonCinnamon is a spice obtained from the inner bark of several trees from the genus Cinnamomum that is used in both sweet and savoury foods...
, coffeeCoffeeCoffee is a brewed beverage with a dark,init brooo acidic flavor prepared from the roasted seeds of the coffee plant, colloquially called coffee beans. The beans are found in coffee cherries, which grow on trees cultivated in over 70 countries, primarily in equatorial Latin America, Southeast Asia,...
, nutmegNutmegThe nutmeg tree is any of several species of trees in genus Myristica. The most important commercial species is Myristica fragrans, an evergreen tree indigenous to the Banda Islands in the Moluccas of Indonesia...
and cardamum.
Soekarno's pantun
Pantun
The pantun is a Malay poetic form. The pantun originated as a traditional oral form of expression. The first examples to be recorded appear in the 15th century in the Malay Annals and the Hikayat Hang Tuah. The most common theme is love....
he wrote about the lake reads: