| Lake Sagami | |
|---|---|
 |
|
| Location | Kanagawa |
| Coordinates | 35°36′N 139°11′E / 35.6°N 139.183°ECoordinates: 35°36′N 139°11′E / 35.6°N 139.183°E |
| Lake type | reservoir |
| Primary inflows | Sagami River[1] |
| Primary outflows | Sagami River |
| Catchment area | 1.064 km2 (0.411 sq mi)[1] |
| Basin countries | Japan |
| Surface area | 3 km2 (1.2 sq mi) |
| Average depth | 19 m (62 ft)[2] |
| Max. depth | 32 m (100 ft)[2] |
| Water volume | 63,200,000 m3 (1.67×1010 US gal)[2] |
| Residence time | 0.05 year[2] |
| Shore length1 | 34.4 km (21.4 mi)[2] |
| Surface elevation | 167 m (550 ft) |
| Frozen | never |
| Settlements | Sagamihara[3] |
| References | [1][2][3] |
| 1 Shore length is not a well-defined measure. | |
Lake Sagami (相模湖 Sagami-ko) is an artificial lake located in Sagamihara, Kanagawa in Japan's Kantō region. Created in 1947 after the Sagami River was dammed, it serves as use for recreational and hydroelectric purposes.[1][3] The lake also served as venue for canoeing and rowing events at the 1964 Summer Olympics held in Tokyo, located 60 kilometres (37 mi) from the lake.[3][4][5][6][7]
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Water and land usage surrounding the lake
Typical lake flows (in m3/s) are 85 hydroelectric, 10.34 domestic, 4.16 irrigation, and 2.15 industrial.[2] Land usage is 87.5% natural, 4.6% agricultrual, and 7.9% other.[2] Eutrophication issues have been a serious issue of the lake that was first observed in 1967.[1] The main issue was microcystis algae bloom and reached its highest cell count of 2,500,000 cells/mL in July-October 1979 (data from 1985).[1] Most vegetation grown around the lake are grassland and weeds while most crops grown are rice and vegetables.[1] Fertilizer application for crops near the lake is moderate.[1]
Recreational uses
Because of the lake's creation in 1947, it displaced the careers of many local fishermen in the area.[8] In return for their livelihood being taken away, many of these families were offered rental boats in the new lake.[8] No private boats are allowed on the lake as a result.[8] To compensate for the loss of the smelt, black bass from the United States was imported to the lake as was Prussian carp.[8] Because of the bass, the lake is a popular recreational fishing area.[8] The lake is also used for couples dating for boat rides and families. Row boat standard daily rental rates are ¥3000 for one person, ¥4500 for two people, and ¥6000 for three people with hourly rates being more expensive.[8]
Water treatment
In 1984, there were 170 industrial and four municipal sewage treatment plants surrounding the lake.[1]
References
- ^ a b c d e f g h i International Lake Environment Committee (ILEC) of Japan detail information on Lake Sagami. - accessed September 9, 2008.
- ^ a b c d e f g h ILEC basic information on Lake Sagami. - accessed September 9, 2008.
- ^ a b c d JNTO information on Lake Sagami. - accessed September 9, 2008.
- ^ 1964 Summer Olympics official report Volume 1, Part 1. (English) & (French) - accessed September 11, 2008.
- ^ 1964 Summer Olympics official report Volume 1, Part 2. (English) & (French) - accessed September 11, 2008.
- ^ 1964 Summer Olympics official report Volume 2, Part 1. (English) & (French) - accessed September 11, 2008.
- ^ 1964 Summer Olympics official report Volume 2, Part 2. (English) & (French) - accessed September 11, 2008.
- ^ a b c d e f Green Gables information on Lake Sagami. - accessed September 9, 2008.
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| Preceded by Lake Albano  Rome, Italy1960 |
Olympic Regatta Venue  1964 |
Succeeded by Lake Xochimilco  Mexico City, Mexico1968 |
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