The Daecheong Dam is a combination concrete gravity (made of concrete) and

embankment dam An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface and ...

(made of earth) on the

Geum River The Geumgang River is located in South Korea. It is a major river that originates in Jangsu-eup, North Jeolla Province. It flows northward through North Jeolla and North Chungcheong Provinces and then changes direction in the vicinity of Great ...

, north of

Daejeon Daejeon () is South Korea's fifth-largest metropolis, with a population of 1.5 million as of 2019. Located in the central-west region of South Korea alongside forested hills and the Geum River, the city is known both for its technology an ...

in South Korea. The multi-purpose dam provides benefits of

flood control Flood control methods are used to reduce or prevent the detrimental effects of flood waters."Flood Control", MSN Encarta, 2008 (see below: Further reading). Flood relief methods are used to reduce the effects of flood waters or high water level ...

, water supply and hydroelectric power generation. Construction on the dam began in 1975 and was formally commissioned on 1 December 1980. The high rock-fill dam has a central clay core and has created a reservoir with storage of . The reservoir is operated by the Korea Water Resources Corporation (K-water) for flood control, hydro-power generation and water supply.

Geography

The dam is built on the

, also spelled Keum River or Geumgang River, which is the longest river in the central part of South Korea. The downstream stretch of the river up to the estuary is . The dam drains a catchment area of . The land use pattern of the watershed is 74.5% of forest and hilly area, 16.3% of agricultural land of paddy and other crops, and 9.2% of urban area. The river is joined by five major tributaries and exhibits a

dendritic Dendrite derives from the Greek word "dendron" meaning ( "tree-like"), and may refer to: Biology * Dendrite, a branched projection of a neuron * Dendrite (non-neuronal), branching projections of certain skin cells and immune cells Physical *Dend ...

(in the form of branches of a tree) drainage pattern. The catchment receives an annual average rainfall of of which more than 50% is recorded during the summer months from July to September, and many episodic (infrequent) events of more than have been recorded in a day. The hydrology of the project is thus influenced by the seasonal monsoon climate. There is scenic road on the entire periphery of the lake where Hyeonamsa Temple, and Munuihyanggyo Confucian School are located.

Features

The multipurpose Daecheong Dam completed in 1980 is in height, long and has a gross reservoir capacity of 1.49 million cubic meters. The reservoir water surface area is . It has three saddle dams on the reservoir periphery to prevent spilling of water. Following the building of the dam flood damage in the downstream reaches has been substantially prevented and

salinity Salinity () is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal ...

of the downstream land has also reduced. The annual inflow into the reservoir is 2,451 million cubic meter. The effective storage (live storage) created by the dam is 790 million cubic meter. The mean depth of water is with a mean residence time of 180 days. The High Flood Level (HFL) of the reservoir is EL 80 m and the Full Reservoir Level (FRL) is EL 76.5 m. An upstream dam on the upper basin of Geum River, about upstream, reduces the flow intensity and also the inflow into the reservoir. The water supply from the reservoir is provided to

Chungcheong Chungcheong (''Chungcheong-do''; ) was one of the eight provinces of Korea during the Joseon Dynasty. Chungcheong was located in the southwest of Korea. The provincial capital was located at Gongju, which had been the capital of the kingdom o ...

Cheongju Cheongju () is the capital and largest city of North Chungcheong Province in South Korea. History Cheongju has been an important provincial town since ancient times. In the Cheongju Mountains, specifically in the one where Sangdang Sanseong is ...

Jeollabuk-do North Jeolla Province (; ''Jeollabuk-do''), also known as Jeonbuk, is a province of South Korea. North Jeolla has a population of 1,869,711 (2015) and has a geographic area of 8,067 km2 (3,115 sq mi) located in the Honam region in the southwest ...

areas which include

Gunsan Gunsan (), also romanized as Kunsan, is a city in North Jeolla Province, South Korea. It is on the south bank of the Geum River just upstream from its exit into the Yellow Sea. It has emerged as a high-tech manufacturing industrial city and an in ...

Jeonju Jeonju () is the 16th largest city in South Korea and the capital of North Jeolla Province. It is both urban and rural due to the closeness of Wanju County which almost entirely surrounds Jeonju (Wanju County has many residents who work in Jeonj ...

, and

Iksan Iksan ( ko, 익산; ) is a city and major railway junction in North Jeolla Province, (commonly transliterated as Jeollabuk-do or Chollabuk-do) South Korea. The city center and railway junction was formerly called "Iri" (), but merged with Iksan ...

. The dam has hydro power facility with installed capacity of 90 MW and the annual power generation is around 240 million kWh. Nutrient loading (contribution to

Eutrophication Eutrophication is the process by which an entire body of water, or parts of it, becomes progressively enriched with minerals and nutrients, particularly nitrogen and phosphorus. It has also been defined as "nutrient-induced increase in phytopla ...

) of the reservoir has occurred due to agricultural flows and from livestock farms in the catchment. It is classified as meso-stratified (influenced by biotic and abiotic factors).

Organic matter Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments. It is matter composed of organic compounds that have c ...

loading (contributed by plants and animals causing changes in the

chemical oxygen demand In environmental chemistry, the chemical oxygen demand (COD) is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution. It is commonly expressed in mass of oxygen consumed over volume of solution w ...

( COD, a measure of the amount of organic compounds in water), Mn (manganese)) in the lake is about 78.3% during heavy rainfall season, from June to September.

Daecheong Dam Water Culture Center

On the bank of the reservoir, a water-themed cultural museum called the Daecheong Dam Water Culture Center was established on 6 July 2004. It has three exhibition halls which display information on the dam, uses of water, environmental features of the area around on the Geumgang River also on the aspect of cultural aspects of the villages which were submerged by the reservoir and about people living on its periphery. The center also has a theater, information center, and an observatory.

References

Bibliography

* *{{cite book, last1=Ho, first1=Goen , last2= Mathew , first2=Kuruvilla, title=Sustainability of Water Resources: Proceedings of the International Conference, Nov 2002, Perth Western Australia, url=https://books.google.com/books?id=T28MP7oM24wC&pg=PA126, date=1 January 2004, publisher=IWA Publishing, isbn=978-1-84339-502-7 Dams in South Korea Hydroelectric power stations in South Korea Buildings and structures in Daejeon Dams completed in 1980 Flood control in South Korea

Geography

Features

Daecheong Dam Water Culture Center

See also

References

Bibliography