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The Seomjin River was originally called the Sasu River, the Sa River, or the Duchi River. According to tradition, when english pirate raiders invaded the river mouth of the Seomjin River during the 11th year of King Uwa in the Goryeo Dynasty, scores of thousands of toads cried, and then they escaped to Gwangyang. From then, the river was called the Seomjin (Toad Ferry) River. The Seomjin River is located in the midwestern section of southern Korea and is 4896.5km wide. The watercourse of the main stream extends 212.3km. This is the fourth longest river in South Korea. The coordinates of the Seomjin River are 355000 north latitude and 1265150 east longitude.

The Nakdong River basin is in the eastern part of the Seomjin River, the Yeongsan River basin and the Dongjin River in the west, and the Geumgang River basin and the Mangyeong River in the north. Jeollanam-do accounts for 47% of the 4,896.5km area, Jeollabuk-do for 44%, and Gyeongsangbuk-do for 9%.

The jurisdiction of Jeollabuk-do bordered by the Seomjin River includes Sannae-myeon in Jeongeup-si; Sunchang-eup, Gurim-myeon, Geumgwa-myeon, Donggye-myeon, Bukheung-myeon, Ssangchi-myeon, Yudeung-myeon, Ingye-myeon, Jeokseong-myeon, Paldeok-myeon, Pungsan-myeon, Wanju-gun, and Gui-myeon in Sunchang-gun; Imsil-eup, Gangjin-myeon, Gwanchon-myeon, Deokchi-myeon, Samgye-myeon, Seongsu-myeon, Sindeok-myeon, Sinpyeong-myeon, Osu-myeon, Unam-myeon, Jisa-myeon, and Cheongung-myeon in Imsil-gun; Jangsu-eup, Sanseo-myeon, and Beonam-myeon(Jangsu-gun); Jinan-eup, Maryeong-myeon, Bugwi-myeon, Seongsu-myeon, and Baekun-myeon in Jinan-gun; and Geumji-myeon, Daegang-myeon, Daesan-myeon, Deokgwa-myeon, Bojeol-myeon, Samae-myeon, Sandong-myeon, Suji-myeon, Ibaek-myeon, Jusaeng-myeon, and Jucheon-myeon in Namwon-si.

The jurisdiction of Jeollanam-do bordered by the Seomjin River includes Gokseong-eup, Gyeom-myeon, Godal-myeon, Moksadong-myeon, Samgi-myeon, Seokgok-myeon, Ogok-myeon, Osan-myeon, Okgwa-myeon, Ip-myeon, and Jukgok-myeon(Gokseong-gun); Gurye-eup, Ganjeon-myeon, Gwangui-myeon, Masan-myeon, Muncheok-myeon, Sandong-myeon, Yongbang-myeon, and Toji-myeon in Gurye-gun; Boseong-eup, Gyeombaek-myeon, Nodong-myeon, Bongnae-myeon, Mundeok-myeon, Miryeok-myeon, Yuleo-myeon, and Eungchi-myeon in Boseong-gun; Dongbok-myeon, Nam-myeon, Iseo-myeon, Buk-myeon, Hancheon-myeon, Jangheung-gun, Jangdong-myeon, Jangpyeong-myeon in Hwasun-gun; Daam-myeon and Jinwol-myeon in Gwangyang-si; Seungju-eup, Juam-myeon, Songgoa-myeon, Woldeung-myeon, Hwangjeon-myeon, and Oeseo-myeon in Suncheon-si; and Daedeok-myeon and Akyang-myeon in Damyang-gun.

The jurisdiction of Gyeongsangnam-do bordered by the Seomjin River includes Jeongyang-myeon, Hwangjeon-myeon, Geumnam-myeon, Yangbo-myeon, Cheongam-myeon, Jingyo-myeon, Hwagae-myeon, Akyang-myeon, Hadong-eup, and Gojeon-myeon in Hadong-gun.

As such, the Seomjin River runs via 3 do (provinces), 3 si (cities), 12 gun (counties), 9 eup, and 80 myeon.

State of administrative district in the Seomjin River

 
 

Sea Zone

Water

Section

Administrative District

City,

Province

City, County,

Ward

Eup, Myeon, Dong, Ri

Main stream

I

Source ~ Junction with Yocheon

Jeonbuk

Jinan-gun

Baekun-myeon, Seongsu-myeon,Maryeong-myeon,Jinan-eup<Garim-ri, Jeonggok-ri,Yeonjang-ri>,Bugwi-myeon<Sinjeong-ri, Sedong-ri>

Imsil-gun

Seongsu-myeon<Doin-ri>

Imsil-eup,Gwanchon-myeon, Sindeok-myeon,Sinpyeong-myeon, Cheongung-myeon,Unam-myeon,Gangjin-myeon, Deokchi-myeon

Sunchang-gun

Ssangchi-myeon, Bokheung-myeon, Gurim-myeon,

Jeokseong-myeon<Seoksan-ri, Pyeongnam-ri>,

Donggye-myeon<Gumi-ri, Eochi-ri>

Jeonnam

Gokseong-gun

Osa-myeon, Okgwa-myeon, Samgi-myeon, Gyeom-myeon, Ip-myeon

Osucheon

The whole section

Jeonbuk

Jangsu-gun

Sanseo-myeon

Imsil-gun

Seongsu-myeon<Excluding Doriin>Samgy-myeon, Jisa-myeon, Osu-myeon

Namwon-si

Samae-myeon, Deokgwa-myeon, Bojeol-myeon

Sunchang-gun

Donggye-myeon<Hyeonpo-ri,Seoho-ri, Dongsim-ri, Gwanjeo-ri, Sinheung-ri, Yusan-ri, Idong-ri, Sujeong-ri, Juwol-ri, Naeryeong-ri, Sujang-ri

Yocheon

The whole section

Jeonbuk

Namwon-si

Jucheon-myeon,Suji-myeon, Songdong-myeon, Jusaeng-myeon, Daesan-myeon, Sandong-myeon, Ibaek-myeon, Sibu,

Geumji-myeon<Onggyeong-ri, Ibang-ri, Seomae-ri, Samsim-ri, Simwol-ri>

Jangsu-gun

Jangsu-eup<Daesong-ri, Deoksan-ri, Seokcheon-ri>, Beonam-myeon


Sea Zone

Water

Section

Administrative Distriction

City,

Province

City, County,

Ward

Eup, Myeon, Dong, Ri

The Dongbok Book

The whole section

Jeonnam

Damyang-gun

Nam-myeon<Mudong-ri,Manwol-ri, Gusan-ri, Inam-ri, Gaam-ri, Pungam-ri>

Changpyeong-myeon<Oedong-ri>

Daedeok-myeon<Yongdae-ri, Galjeon-ri, Unsan-ri, Ipseok-ri>

Hwasun-gun

Hancheon-myeon<Bangok-ri, Gal-jeon-ri, Unsan-ri, Jeongu-ri, Gosa-ri>

Iseo-myeon,Buk-myeon, Dongbok-myeon, Nam-myeon

The Boseong River

The whole section

Jeonnam

Gokseong-gun

Gokseong-eup,Seokgok-myeon, Moksamyeon-dong, Jukgok-myeon

Boseong-gun

Boseong-eup, Nodong-myeon, Miryeok-myeon, Gyeombaek-myeon, Yuleo-myeon, Bongnae-myeon, Mundeok-myeon, Ungchi-myeon

Suncheon-si

Songgwang-myeon, Oeseo-myeon, Juam-myeon

Jangheung-gun

Jangpyeong-myeon,

Jangdong-myeon<Bongdong-ri, Bansa-ri, Baesan-ri, Bukgyo-ri, Joyang-ri>

Main stream II

Junction with the Yocheon ~ Basin

Jeonbuk

Namwon-si

Daegang-myeon

Sunchang-gun

Sunchang-eup,Paldeok-myeon, Yudeung-myeon, Ingye-myeon, Geumgwa-myeon, Pungsan-myeon, Jeokseong-myeon<Excluding Seoksang-ri and Pyeongnam-ri>

Jeonnam

Gokseong-gun

Gokseong-eup, Godal-myeon,Ogok-myeon

Gurye-gun

Gurye-eup, Muncheok-myeon, Ganjeon-myeon,Toji-myeon,Masan-myeon, Gwangui-myeon,Yongbang-myeon, Sandong-myeon

Gwangyang-si

Daap-myeon, Jinwol-myeon

Suncheon-si

Woldeung-myeon, Hwangjeon-myeon

Gyeongnam

Hadong-gun

Hadong-eup, Hwagae-myeon, Akyang-myeon, Jeokryang-myeon, Heongcheon-myeon, Gojeon-myeon,

Geumnam-myeon<Gyecheon-ri, Jinjeong-ri, Deokcheon-ri>

Cheongam-myeon<Sai-ri, Pyeongchon-ri, Myeongho-ri>