Tone (river)
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Tone 利 根 川 |
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 Kurihashi River Observation Station (June 2005) |
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| Data | ||
| location | Japan . Prefectures Gunma , Saitama , Ibaraki and Chiba | |
| River system | Clays | |
| source | Mount Ōminakami ( 大水 上山 ) 37 ° 3 ′ 0 ″ N , 139 ° 6 ′ 0 ″ E |
|
| Source height | 1600 m | |
| muzzle |
Pacific Ocean Coordinates: 35 ° 44 ′ 41 " N , 140 ° 51 ′ 3" E 35 ° 44 ′ 41 " N , 140 ° 51 ′ 3" E |
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| Mouth height | 0 m | |
| Height difference | 1600 m | |
| Bottom slope | 5 ‰ | |
| length | 322 km | |
| Catchment area | 16,840 km² | |
The Tone ( Japanese 利 根 川 , Tone-gawa ) is the second longest river in Japan after the Shinano with a length of 322 km . With 16,840 km², however, it has the largest catchment area.
Course of the river
The source of the clay is Mount Ōminakami on the border of the Gunma and Niigata prefectures . It flows through the following places in the prefectures of Gunma, Saitama , Ibaraki and Chiba :
| Gunma Prefecture | Saitama Prefecture | Ibaraki prefecture | Chiba prefecture |
|---|---|---|---|
| Numata | Honjō | Koga | Noda |
| Shibukawa | Fukaya | Torids | Abiko |
| Maebashi | Kumagaya | Moriya | Narita |
| Takasaki | Gyōda | Itako | Katori |
| Isesaki | Hanyu | Kamisu | Choshi |
| Ōta | Kazo | ||
| Full |
history
The clay was once known to change course during the flood. It is difficult today to determine its previous course. Originally it flowed into Tokyo Bay . Today the Edo flows into Tokyo Bay, a river that branches off from the Tone ( river bifurcation ).
As a result of the Fukushima nuclear disaster , radioactive concentrations of cesium of 110 becquerels per kilogram were found in silver carp that had been fished in the clay in April 2012 . The river is 180 kilometers from the Fukushima. Six fishermen and 10 towns on the river were banned from fishing in the clay.
Individual evidence
- ↑ JAIF (April 26, 2012) EaRTHQUAKE REPORT 412: Cesium contaminated fish found in Tone river ( Memento of the original from May 22, 2012 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ http://www.spreadnews.de/japan-aktuell-radioaktiv-kontaminierter-fisch-in-fluss-entdeck/1121757/
