The Four Major Rivers Restoration P

The Four Major Rivers Restoration Project
Yoon Jung Cha, Myung-Pil Shim, and Seung Kyum Kim, Office of National River Restoration
Type of tool: water planning
Issue: watersheds
Location: South Korea, Asia
Challenges
The project is designed to address the significant environmental challenges faced by the Han,
Nakdong, Geum and Yeongsan rivers in Korea. Repeated flooding and droughts have caused
human casualties, ecosystem loss and habitat degradation, property damage and forced
displacement of riverine residents. Extreme weather events that lead to flooding and droughts are
expected to worsen in frequency and intensity due to climate change impacts. In the case of the
Yeongsan River, toxic contamination from domestic and industrial waste disposal has resulted in
water quality levels unfit even for agriculture and industrial use. These environmental challenges
have dramatic economic consequences.
In Korea, cases of torrential rainfall over 100 mm in a day have increased by 1.7 times during the
last 10 years. In 2002, Typhoon Rusa brought record-breaking rainfall of 870 mm a day in
Korea. Moreover, torrential rainfall is expected to increase by 2.7 times and droughts are
expected to become 3.4 times more frequent in the near future.
The annual average precipitation of Korea is 40% greater than the world average. However, the
amount of water available per capita in a year is only about 12% greater, because two-thirds of
the annual rainfall occurs during the rainy season from June to September, and almost no rain
occurs in the dry season. As a result, disasters caused by repeated floods and droughts used to be
commonplace. In addition, the river reaches in Korea are relatively short and channel slopes are
steep. Therefore, flooding occurs quickly, peak flood discharges are great, and flow variations
are comparatively large.

ผลลัพธ์ (แอฟริกา) 1:

Die vier groot riviere restourasieprojek
Yoon Jung Cha, Myung-Pil Shim en Seung Kyum Kim, Kantoor van die Nasionale River Restoration
Tipe Tool: Water beplanning
Uitgawe: waterskeidings
ligging: Suid-Korea, Asië
Uitdagings
Die projek is ontwerp om die beduidende Omgewing aan te spreek. uitdagings wat die Han,
Nakdong, Geum en Yeongsan riviere in Suid-Korea. Herhaalde droogtes en vloede veroorsaak het
ongevalle Human, Ekosisteem Habitat verlies en agteruitgang, skade aan eiendom en gedwing
verplasing van Riverine Inwoners. Uiterste weersomstandighede wat lei tot vloede en droogtes is
verwag om te vererger in frekwensie en intensiteit Weens die impak van klimaatverandering. In die geval van die
rivier Yeongsan, het giftige besoedeling van huishoudelike en industriële afval tot gevolg gehad dat Beskikking
Waterkwaliteit vlakke selfs ongeskik vir landbou en industriële gebruik. Hierdie omgewingsuitdagings
het dramatiese ekonomiese gevolge.
In Korea, stortreën van meer as 100 mm in gevalle per dag toegeneem met 1,7 keer gedurende die
afgelope 10 jaar. In die 2002, Typhoon Russies record gebring reënval van 870 mm per dag in
Suid-Korea. Daarbenewens is stortreën na verwagting met 2,7 keer en droogtes is
verwag om 3,4 keer meer dikwels in die nabye toekoms.
Die jaarlikse gemiddelde reënval is 40% groter as Korea van die Wêreld gemiddelde. Maar die
hoeveelheid per capita Water beskikbaar in 'n jaar is slegs 12% van 'n groter, omdat twee derdes van
die jaarlikse reënval gedurende die reënseisoen van Junie tot September, en byna geen reën
kom in die droë seisoen. As gevolg hiervan, rampe veroorsaak deur herhaalde vloede en droogtes wat gebruik word om te
alledaags. Daarbenewens het die rivier bereik in Korea is relatief kort en Channel hange is
steil. Daarom, oorstromings plaasvind vinnig, Peak ontlaai is Groot Vloed, en vloei variasies
is betreklike groot.