Received March 6, 2013/ revised May 7, 2013/ accepted July 3, 2013
Copyright ⵑ 2013 by the Korean Society of Civil Engineers
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0)
ǣǣȀȀǤǤȀͳͲǤͳʹͷʹȀ ǤʹͲͳ͵Ǥ͵͵ǤͷǤͳͺʹͻ Ǥ ǤǤ
ᙗᦗᇓ#⟖ኂ#⺾⛢#⇍#⟖Ὢ⢚⛢#Ⱳ⮿⮎#ἶ#㴎ὂ㡷⛯#⮮ጪ
ੲ୨ࢢ ȵࠑਏ
Ahn, Jung Min*, Lyu, Siwan**
A Study on the Effect of Dredging and Operation of Weirs on Hydraulic Characteristics in Nakdong River
ABSTRACT
It is essential to understand the hydraulic characteristics in accordance with the changes in the river environment and operating hydraulic structures for increasing flood-control capacity. The objective of this study is to analysis the effect of dredging and operation of weirs on hydraulic characteristics in Nakdong River(SeongjuImhaejin). HEC-RAS model has been used to examine the hydraulic characteristics with considering the flow transition through the unsteady flow analysis and the information about the specifications of multi-functional weirs. The relationship between Manning n and roughness height k, the effect of weir installation and operation on the flow and stage, and the bed change resulted from the river treatment project have been examined by steady and unsteady flow analysis. It is expected that the result from this study can be the basic data for the river treatment and management.
Key words : HEC-RAS, Hydraulic characteristic, Nakdong river, River treatment
Ⅹಾ
ᙹญǍ᳑ྜྷ᮹⬉ŝᱢᬕᩢŝ⪮ᙹʑ⦝⧕ᱡqᮥ᭥⧕ᕽ۵⦹ᙹญ✚ᖒᨱݡ⦽ᱢᱩ⦽ᯕ⧕a⦥ᙹᱢᯕʑভྙᨱᅙᩑǍᨱᕽ۵Ӻ࠺vᙹĥ
ɩ⪙vᮁ᯦ḡᱱ⦹ඹෝݡᔢᮝಽᵡᖅၰᙹญᖅྜྷᬕᩢᨱෙᙹญ✚ᖒᩢ⨆ᮥᇥᕾ⦹ᩡ݅. ᙹญ✚ᖒᇥᕾᮥ᭥⧕HEC-RAS ༉⩶ᮥᯕᬊ
⦹ᩡᮝ໑, ᇡᱶඹ⮱⧕ᕾᮥ☖⧕⮱᮹ᯕෝၹᩢ⦹Łᙹญᖅྜྷᬕᩢᮥ᭥⦽݅ʑ܆ᅕᱽᬱᮥᱢᬊ⦹ᩡ݅. ᳑ࠥĥᙹ᪡᳑Łs᮹šĥ, ᱶඹ᪡ᇡᱶඹ⮱⧕ᕾ, ᔍᨦᱥŝ⬥⦹݉໕əญŁ݅ʑ܆ᅕᬕᩢᨱෙ⦹⮱ᨱݡ⧕݅bࠥಽᩑǍෝ⦹ᩡ݅. Ӻ࠺vᙹĥᵝš ᝍǍeᮥᵲᝍᮝಽɪĊ⦽ḡ⩶ᄡ⪵ၰᙹญǍ᳑ྜྷᬕᩢᨱ᮹⦽⪮ᙹᨱݡእ⦹Łᵝḡᱱᄥᮁపᱥݍᨱ᮹⦽⪮ᙹ❭ᨱݡ⧕ᇥᕾࡽᯱഭ۵⧊
ญᱢᯙ⦹šญෝ᭥⦽ʑⅩᯱഭಽ⪽ᬊࢁᙹᯩᮥäᯕ݅.
áᔪᨕ HEC-RAS, ᙹญ✚ᖒ, Ӻ࠺v, ⦹ᱶእ
1. ᕽು
ᬑญӹ⦹ᮡࠥ⪵᪡ᔑᨦ⪵ෝÑ⊹໕ᕽᯕ⻰⊹ᙹෝᵲᝍᮝಽ}ၽࡹᨕ᪵ᮝ໑↽ɝॅᨕḡǍ᪉ӽ⪵॒᮹ჵḡǍᱢᯙʑ⬥ᄡ⪵ಽ
ᯙ⧕࠭ၽ⪙ᬑၰḲᵲ⪙ᬑaኩჩ⦹íၽᔾࡹŁᯩ݅. ✚⯩, ᬑญӹ۵ᱽႊ⇶᳑᭥ᵝ᮹⊹ᙹݡ₦ᮝಽᯙ⦹ᩍ⊹ᙹ᭥⨹ࠥa᷾a⦹Ł
ᯩʑভྙᨱᯕᨱݡ⦽ݡ᮲₦ᮝಽᵡᖅᨱ᮹⦽⪮ᙹႊᨕ܆ಆ᷾ݡෝᱽᦩ⦹ᩡ݅(ǎ☁⧕᧲ᇡ, 2009a). 4ݡvᔕญʑᔍᨦᮡᵡᖅᮥ☖⦽
⪮ᙹႊᨕ܆ಆ᷾ݡᔍᨦ᮹ݡ⢽ᱢᔍಡಽɪĊ⦽⦹᮹ྜྷญᱢ⪹Ğᄡ⪵ၰᔩಽᬕ⦹ᖅ᯦ࠥᮝಽ⪮ᙹၽᔾ᳑Õ᮹ᄡ⪵ෝʑ⦹ᩡ݅.
սėॡ
⪮ᙹᰍ⧕šญႊᦩᨱݡ⦽Ǎ᳑ᱢݡ₦ᮡʑ᳕⦹ࠥ᮹℉ࢱ⪮ᙹప
ᮥᇥݕ⦹ᩍᵝᄡḡᩎ᮹⪮ᙹ⦝⧕᮹ᰁᰍᖒᮥ᪥⪵┅໑, ᖅĥ
ႊჶᨱᙹᄡŖe᮹ၙšၰ⊽ᙹᖒᮥ᷾ḥ┍ᙹᯩ۵ๅᬑ
ᝅᬊᱢᯙႊᦩᯕŁ⧁ᙹᯩ݅. ǎ☁⧕᧲ᇡ(2009a)ᨱᕽ᯦ࠥ⦽
“4ݡv ᔕญʑ ษᜅ░⥭”ᨱᕽ۵ օऽᨱᕽ ᯙvᨱ ݡ⧕
ᱽ⦽“Room for the River"᮹}ֱᮥ᯦ࠥ⦹ᩍ⦹ࠥᵡᖅ, ⪮ᙹ░
ᵡᖅ, ᱽႊ⬥♕॒ᮥʼnᯱಽ⦽⪮ᙹݡ₦ᮥᙹพ⦹ᩡ݅. ə్ӹ
ݡȽ༉⦹Ŗᔍ⧪ŝᇩᨕ⪮ᙹʑ⦹᮹⮱ᮥႊ⧕⧁ᙹ
ᯩ۵ᙹญᖅྜྷ᮹ᖅ⊹۵⪮ᙹᰍ⧕᭥⨹ᖒᮥ᷾a⎑Ł, ᵡᖅᨱ
ෙɪĊ⦽⦹݉໕ᄡ⪵۵ʑ᳕᮹ᙹ᭥-ᮁపšĥłᖁ᮹ᝁ
ࠥෝᱡ⦹⎑݅. ᯕ్⦽ɪĊ⦽ᄡ⪵ᨱෙᩩ⊂ᇩa܆⦽⦝⧕ෝ
↽ᗭ⪵⦹ʑ ᭥⧕ᕽ۵ ⦹ᨱᕽ᮹ ⮱✚ᖒᨱ ݡ⦽ ᱶ⪶⦽ ᳑ᔍ
ၰᇥᕾᯕ⦥ᙹᱢᯕŁ, ၽᔾ⧁ᙹᯩ۵ᰍӽᨱᖁᱽᱢᮝಽݡ᮲⦹ʑ
᭥⦽ ᙹญᖅྜྷ ᬕᩢᨱ ෙ ᙹญ✚ᖒᇥᕾᯕ ⦥⦹݅.
⦹᮹ᙹญ✚ᖒᇥᕾᨱš⦽ᩑǍಽǎ᮹Ğᬑ, ᙹ⊹༉ߙยᮥ
⪽ᬊ⦽⪮ᙹᩩ⊂ၰᅖǍݡ₦ᨱš⦽ᩑǍaᵝෝᯕ໑ݡ⢽ᱢᮝ ಽHicks and Peacock(2005)۵Peace Riverෝݡᔢᮝಽ⪮ᙹᩩ⊂
ᮥ ᭥⦽ HEC-RAS༉⩶᮹ ᇡᱶඹ ༉᮹ ᱢ⧊ᖒᮥ ⠪a⦹ᩡŁ, Pappenberger et al(2005)۵⦹ඹჵ௭ᙹ᭥š⊂ᯱഭෝ⪽ᬊ⦽
HEC-RAS ᇡᱶඹ༉᮹ෝᙹ⧪⦹ᩍๅ}ᄡᙹᇩ⪶ᝅᖒᮥ⠪a⦹
ᩡᮝ໑Prafulkumar et al(2011)ᮡLower Tapi vᮥݡᔢᮝಽ
⪮ᙹᩩ⊂ᮥ ᭥⦽ HEC-RAS ༉⩶ ๅ}ᄡᙹ ᅕᱶᮥ ᙹ⧪⦽ ၵ
ᯩ݅. ǎԕ᮹Ğᬑ, ʡᄲ₍ŝᯕ᳦ᕾ(2009)ᮡ⦹ᅖᬱᮝಽᯙ⧕
ᙹญ⦺ᱢᗭaɪᄡ⦽⦹ᨱᕽ᮹ᱶ⪶⦽᳑ࠥĥᙹෝᔑᱶ⦹ʑ
᭥⦽ႊჶᮥࠥ⇽⦹ʑ᭥⧕HEC-RAS᪡2₉ᬱᙹญ⧕ᕾႊჶᮥ
ᯕᬊ⦹ᩡŁᯕᔢḥ॒(2010)ᮡ1₉ᬱᇡᱶඹ༉⩶ᯙFLDWAV
༉⩶ᮥᯕᬊ⦹ᩍӺ࠺v⦹ඹ᮹⪮ᙹ✚ᖒᮥᇥᕾ⦹ᩡ݅. ʡᵝᩢ
॒(2010)ᮡHEC-RAS ၰFLDWAVෝᯕᬊ⦹ᩍ⦽vᮥݡᔢᮝ ಽĥ⫮⪮ᙹ᭥ෝá☁⦹ᩡᮝ໑v⩶॒(2011)ᮡHEC-RASෝ
ᯕᬊ⦹ᩍɚ⦽⪮ᙹᔍᔢᨱݡ⦽ᱡඹḡ᮹⪮ᙹ᭥ᱡq⬉ŝෝᇥᕾ
⦽ၵᯩ݅. ʡ᧲ᙹ(2010)۵ʑ᳕᮹ᙹྙ⦺ᱢ༉⩶ᮡ⦹Ǎ᳑ྜྷᨱ
᮹⦽ ႑ᙹᩢ⨆ ॒ᮥ Łಅ⦹ḡ ༜⦹ʑ ভྙᨱ ᙹญ⧕ᕾ ༉⩶᮹
ᄲ⧪Ǎ⇶ᯕᇩa⦝⦹݅Ł⦹ᩡᮝ໑, ᯕෝᅕ᪥⦹ʑ᭥⧕1₉ᬱ
ᙹญ⧕ᕾ༉⩶ᯙFLDWAVෝ₥┾⦹ᩍ⪮ᙹᩩᅕᜅ▽Ǎ⇶ᮥ
☖⦽ ⪮ᙹᩩᅕ ⇵ḥ᮹ ⦥ᖒᮥ ᨙɪ⦹ᩡ݅.
4ݡvᔕญʑᔍᨦᮡ⦹ࠥԕᵡᖅŝᙹญᖅྜྷᖅ⊹ಽᯙ⧕ᰁᰍ ᱢ ᭥⨹ᖒᮥ ԕ⡍⦹Ł ᯩ݅. ⦹ᮥ ⬂݉⦹۵ Ǎ᳑ྜྷᮡ ⮱ᮥ
۵ᱽႊၰ⦹ᔢᮥᖙǕ┍ᙹᯩ݅. ᅙᩑǍᨱᕽ۵4ݡvᔕญʑᔍ ᨦᱥŝ⬥⦹݉໕ᮥᯕᬊ⦹ᩍ1₉ᬱᙹญ༉⩶ᮥǍ⇶⦹Łᇡᱶඹ
⮱ ⧕ᕾᮥ ☖⧕ ⮱᮹ ᱥᯕෝ ၹᩢ⦹Ł ᙹญᖅྜྷ ᬕᩢᮥ
☖⦽ᙹญ✚ᖒᮥᇥᕾ⦹ᩡ݅. Ӻ࠺vᙹĥᵝšᝍǍeᮥᵲᝍᮝ
ಽɪĊ⦽ḡ⩶ᄡ⪵ၰᙹญǍ᳑ྜྷᬕᩢᨱ᮹⦽⪮ᙹᨱݡእ⦹Ł
ᵝḡᱱᄥᮁపᱥݍᨱ᮹⦽⪮ᙹ❭ᱥ❭᧲ᔢ⧕ᕾᮥ☖⧕ᇥᕾࡽ
ᯱഭ۵ ⧊ญᱢᯙ ⦹šญෝ ᭥⦽ ʑⅩᯱഭಽ ⪽ᬊࢁ ᙹ ᯩᮥ
äᯕ݅.
2. ᩑǍԕᬊ
2.1 ۩ঃલ
ᩑǍݡᔢǍeᮡӺ࠺vᙹĥ᮹ᖒᵝᙹ᭥⢽ḡᱱᇡ░ᯥ⧕ḥᙹ
᭥⢽ḡᱱᯕ໑ݡᔢḡᩎ⩥⫊ᮡFig. 1ŝz݅. ɩ⪙vᯕ⧊ඹ⦹۵
Ӻ࠺v⦹ඹǍeᮡᩑ⠪Ɂvᙹపၰ⪮ᙹʑvᙹపᯕⓍŁ, ⠪ḡ᮹
እᮉᯕ ׳ᮝ໑, ⦹Ğᔍ۵ ᪥อ⦹݅. ੱ⦽, ⪮ᙹ᮹ ḡᗮeᯕ
ʙŁᯕಽᯙ⧕⪮ᙹӺ࠺vᙹ᭥ᔢᨱ᮹⦽ḡඹ⦹᮹ԕᙹ႑ ᱽᇩపᯕӹ, ❭ᯕ⦲॒⋉⚍ᨱ᮹⦽⪮ᙹ⦝⧕aᵝಽၽᔾ⦽݅(ǎ
☁⧕᧲ᇡ, 2009). ᖒᵝᙹ᭥⢽۵No.384ᯕŁᯥ⧕ḥᙹ᭥⢽۵No.163 ᯕ໑ǍeÑญ۵᧞106.9 kmᯕ݅. ݡᔢǍeԕᨱ۵ǎa⦹ᯙ
ɩ⪙v, ⫊v, ԉvᯕ⧊ඹ⦹Łᯩᮝ໑4ݡvᔕญʑᔍᨦᮥ☖⧕
vᱶŁಚᅕ, ݍᖒᅕ, ⧊ֶᅕ, ֶ⧉ᦩᅕaÕᖅࡹᨩ݅. bḡඹ ᮹ᮁ᯦ŝ݅ʑ܆ᅕaᖅ⊹ࡹᨕᯩ۵⦹ᱶእʑᅙĥ⫮(ǎ☁⧕᧲
ᇡ, 2009b)ᔢ᮹݉໕ჩ⪙۵ɩ⪙vNo.363, ⫊vNo.259, ԉv
No.202, vᱶŁಚᅕNo.364+268, ݍᖒᅕNo.322+295, ⧊ֶ
ᅕNo.263+504, ֶ⧉ᦩᅕNo.174+445 ᯕ݅. ⦹ඹಽᇡ░Ñญ ۵vᱶŁಚᅕḡᱱ97.5 km, ɩ⪙v⧊ඹḡᱱ96.7 km, ݍᖒᅕ
ḡᱱ77.1 km, ⧊ֶᅕḡᱱ48.1 km, ⫊v⧊ඹḡᱱ45.8 km, ԉv⧊ඹḡᱱ17.1 km, ֶ⧉ᦩᅕḡᱱ5.1 kmᯕ݅. ↽ᝍᇡ
ෝᩑđ⦽⦹ࠥᖁ⩶ᮡๅᬑอł⦽⩶┽ෝӹ┡ԕ໑ᅖᰂ⦽ḡ⩶✚
ᖒᮥӹ┡ԕŁᯩ݅. ԕᇡᵝḡᱱᮝಽ۵ɩ⪙v⧊ඹ⬥⪵ᬱᙹ᭥
⢽a᭥⊹⦹ŁᯩŁ, ݍᖒᅕᱥŝ⬥ಽŁಚƱᙹ᭥⢽᪡⩥⣮ᙹ᭥⢽
a᭥⊹⧕ᯩ݅. ੱ⦽, ⫊v⧊ඹ⬥ᱢ⡍Ʊᙹ᭥⢽, ԉv⧊ඹ⬥
ḥ࠺ᙹ᭥⢽a᭥⊹⧕ᯩʑভྙᨱš⊂ᙹ᭥᪡ ĥᔑᙹ᭥እƱෝ
☖⦽ ᙹญ✚ᖒ á☁a a܆⦹݅.
2.2 ۚୀ߹֜ౠࢫլծՍ
ݡ⢽ᱢᯙእᱶᔢ⦹ᙹญ⧕ᕾ༉⩶ᮝಽ۵HEC-RAS(Hydrologic Engineering Center, 2010)᪡FLDWAV(Fread and Lewis, 1998)
༉⩶ᮥॅᙹᯩᮝ໑, ǎԕᨱᕽ⪮ᙹᇥᕾᮥ᭥⦽⦹᮹ᙹญ⧕ᕾᇥ
ᨱๅᬑ⡎մí⪽ᬊࡹᨕ᪵݅. HEC-RAS۵ၙᮂǑŖᄲ݉᮹
HEC(Hydrologic Engineering Center)ᨱᕽ}ၽࡽʑ᳕᮹HEC-2
༉⩶ᮥ ၽᱥ┉ äᮝಽ windowsᔢᨱᕽ GUI⪹Ğᮥ ᱽŖ⦹ᩍ
ᔍᬊ⦹ʑᛍᬕᯙ░⟹ᯕᜅෝw⇵ŁᯩŁ, ݅᧲⦽ᙹญǍ᳑ྜྷ᮹
ᬕᩢᮥၹᩢ⧁ᙹᯩ۵Ğĥ᳑ÕᮥǍᖒ⧁ᙹᯩ݅. FLDWAV
༉⩶ᮡ݅ʑ܆ᅕ᪡zᮡa࠺ᅕᨱݡ⦽⮱⧕ᕾᯕᇩa܆⦹ḡอ,
Fig. 1. Index Map of the Nakdong Basin and River
ǎԕ᮹ĞᬑᱥĞᙹ॒(2007)ᮡᯕෝᙹᱶ⦹ᩍ⦽vᅙඹ᮹⮱⧕
ᕾᨱ ᱢᬊ⦽ ၵ ᯩ݅. ࢱ ༉⩶ᮡ zᮡ Saint-Venant ႊᱶᮥ
ᮁ⦽₉ᇥჶᮥᱢᬊ⦹ᩍ⣡ᯕ⦹ḡอ, ḡ⩶᯦ಆႊᨱᕽ₉ᯕa
ᯩ݅. HEC-RASᨱᕽ۵ᝅ⊂ࡽ݉໕ᯱഭෝ⪽ᬊ⧁ᙹᯩ۵ၹ໕, FLDWAV۵᳭ᬑݡ⋎᮹ᱶ⩶ᱢᯙ⦹ࠥ݉໕ᯕǍࡹᨕᙹᝍ-⦹
⡎ᨱݡ⦽šĥෝᖅᱶ⧕ᵝ۵ᇡaᱢᯙ᯲ᨦᯕ⦥⦹Ñӹ, ༉⩶ᯕ
ၽᔑ⧁Ğᬑ, smoothing ʑჶᮥ☖⧕݉໕ᮥᅕᱶ⧕⦽݅.
ᕽ, FLDWAV۵݅ʑ܆ᅕ᪡zᮡᙹญǍ᳑ྜྷ᮹ᱶ⪶⦽ḡ⩶ᯱഭ
᯦ಆᯕᇩa܆⦹݅. ੱ⦽, ↽ɝၙʑᔢℎᙹྙ}ၽᇡᙹญᇥŝᨱᕽ ۵ᙹญ⠪a❡(Hydraulic Evaluation Team)ᮥǍᖒ⦹ᩍ⪮ᙹᩩ⊂
༉ऩ᮹༉⩶ᇩᦩᱶ, ၽᔑྙᱽ⧕đʑჶၙእ, ᇡᱢ⧊⦽ḡ⋉ᕽ/ᖅ
ᕽ, ݅ᙹ᮹đ⧉, AWIPS ქᱥŝPC ქᱥ᮹ᇩᯝ⊹, Ʊᮂŝᱶ᮹
ၙእ ੱ۵ እ⬉ᮉᖒ ॒ᨱ ݡ⧕ ⠪a⦹ᩡŁ, FLDWAV ༉⩶ᮥ
HEC-RAS ༉⩶ᮝಽݡℕෝ⇵ḥᵲᨱᯩ݅(NWS, 2007; ʡɚᙹ
॒, 2009). HEC-RAS۵ᙹḩ, ᮁᔍᯕᘂᨱݡ⦽༉᮹aa܆⦹ʑ
ভྙᨱ⨆⬥, ༉᮹ჵ᭥⪶ᰆᖒᯕᬊᯕ⦹ʑভྙᨱᅙᩑǍᨱᕽ۵
HEC-RASෝ₥┾⦹ᩡ݅. ༉⩶᮹⦹ᔢ݉໕ᮡᔍᨦᱥŝ⬥ಽǍᇥ
⦹ᩍǍ⇶⦹ᩡ݅(Fig. 2). ᔍᨦᱥ݉໕ᮡǎ☁⧕᧲ᇡ(2009b)ᨱᕽ
ᙹพ⦽⦹ᱶእʑᅙĥ⫮݉໕ᮥᯕᬊ⦹ᩡᮝ໑, ᔍᨦ⬥݉໕ᮡ
bŖǍᄥӺ࠺vᝅᖅĥᅕŁᕽ(ǎ☁⧕᧲ᇡ, 2009c; ǎ☁⧕᧲ᇡ, 2009d; ǎ☁⧕᧲ᇡ, 2009e; ǎ☁⧕᧲ᇡ, 2009f)᮹ĥ⫮݉໕ᮥᯕ ᬊ⦹ᩡ݅. ੱ⦽, ݅ʑ܆ᅕᱽᬱၹᩢᮥ᭥⧕Table 1ŝzᯕᙹญǍ
᳑ྜྷᨱݡ⦽ᱽᬱᮥᙹḲ⦹ᩍFig. 3ŝzᯕǍ⇶⦹ᩡ݅. HEC-RAS ᨱᕽ۵ᙹญǍ᳑ྜྷ᮹ᙹྙᬕᩢᮥŁಅ⦹ʑ᭥⧕ᕽTime Series Gate Openings, Elev Controlled Gates, Navigation Dams, Rules ᮹4aḡႊჶᮝಽǍᖒ⧁ᙹᯩᮝ໑ᅙᩑǍᨱᕽ۵Time Series Gate Openings ᪖ᖹᮥᱢᬊ⦹ᩍ༉⩶ᮥǍᖒ⦹ᩡ݅. a࠺ᅕᬕᩢ
᳑Õᮥᱢᬊ⦹ʑ᭥⧕2}᮹a࠺ᅕa᳕⊹ࡽvᱶŁಚᅕ᮹Ğᬑ, Gate 1ᮡ ᙹྙ׳ᯕ 20 m, ⡎ 45 m, Gate 2۵ ᙹྙ׳ᯕ 3 m,
⡎3 mಽᖅᱶ⦹ᩡŁ, Gate type۵Sluice, Weir ⩶┽۵Ogee, Weir ĥᙹ۵1.82ෝᱢᬊ⦹ᩡ݅. 3}᮹a࠺ᅕa᳕⊹ࡽݍᖒᅕ᮹
Ğᬑ, Gate 1~3᮹ᙹྙ׳ᯕ21 m, ⡎40 mಽᖅᱶ⦹ᩡŁ, Gate type۵Sluice, Weir ⩶┽۵Ogee, Weir ĥᙹ۵1.8ᮥᱢᬊ⦹ᩡ݅.
3}᮹a࠺ᅕa᳕⊹ࡽ⧊ֶᅕ᮹Ğᬑ, Gate 1~3᮹ᙹྙ׳ᯕ
Fig. 2. Profile of Before/After for the Four Major Rivers Restoration Project
Table 1. Specifications of Weir
Weir Changnyong-Haman Habcheon-Changnyong Dalseong Gangjeong-Goryeong Height (m) 10.7(EL.-5.7m~5m) 9(EL.1.5m~10.5m) 9.5(EL.4.5m~14m) 14(EL.5.5m~19.5m) Control
Gate
Length (m) 549.3 138 589.5 953.5
Height (m) 7.08
(EL.-2.08m~EL.5.0m)
Lift(B40×H9×3) (EL.1.5m~EL.10.5m)
9.59 (EL.4.5m~EL.14.09m)
11 (EL.8.5m~EL.19.5m)
Gate type Rising sector
(B40×H7.08×3)
190(uncontrol(110)+
hybrid weir(80))
Rising sector (B40×H8×3)
Rising sector (B45×H11.03×2)
Design flood(100yr) (/s) 16,600 14,600 14,300 13,200
Design flood level
(before/after) (EL.m) 13.98/12.92 19.33/18.38 22.72/21.96 24.66/24.05
Management level
(Upstream/Downstream) (EL.m) 5.0/0.76 10.5/5.0 14.0/10.5 19.5/14.0
29.869 m, ⡎40 mಽᖅᱶ⦹ᩡŁ, Gate type۵Sluice, Weir ⩶┽۵ Broad Crested, Weir ĥᙹ۵1.71ᮥᱢᬊ⦹ᩡ݅. 3}᮹a࠺ᅕa
᳕⊹ࡽֶ⧉ᦩᅕ᮹Ğᬑ, Gate 1~3᮹ᙹྙ׳ᯕ20 m, ⡎40 mಽ ᖅᱶ⦹ᩡŁ, Gate type۵Sluice, Weir ⩶┽۵Ogee, Weir ĥᙹ۵
1.82ෝᱢᬊ⦹ᩡ݅. ᔢඹ݉Ğĥ᳑Õᮝಽ۵ᖒᵝᙹ᭥⢽᮹š⊂ᮁ
ప, ⦹ඹ݉ Ğĥ᳑Õᮡ ᯥ⧕ḥᙹ᭥⢽᮹ š⊂ᙹ᭥, ɩ⪙v, ⫊v
əญŁԉv᮹ᮁ᯦ᮁపᮡᖒᕽᙹ᭥⢽, ᵞŁᙹ᭥⢽əญŁÑൂv ᙹ᭥⢽š⊂ᮁపᮥbb⪽ᬊ⦹ᩡ݅. bᙹ᭥⢽᮹š⊂ᮁపᮡš⊂
ࡽᙹ᭥ᯱഭෝၵ┶ᮝಽ⦽ǎᙹྙ᳑ᔍᩑᅕ(2006, ÕᖅƱ☖ᇡ)ᨱ
ᱽࡹᨕᯩ۵ᙹ᭥-ᮁపłᖁᮥᯕᬊ⦹ᩍᮁపᮝಽ⪹ᔑ⦹ᩍ
ᱢᬊ⦹ᩡ݅(Fig. 4). ⪮ᙹᇥᕾᮥ᭥⦽ᙹ⊹༉᮹۵ᇡᱶඹಽ⧕ᕾ⦹
ᩡᮝ໑2006֥ၽᔾ⦽┽⣮“ᨱ᭥ܩᦥ(EWINIAR)” ᔍᔢᮥᖁᱶ
⦹ᩡ݅. ┽⣮“ᨱ᭥ܩᦥ”۵2006֥7ᬵ10ᯝᇡ░7ᬵ11ᯝʭḡ
⦽ၹࠥᨱᔢය⦹ᩡŁ┽⣮ᔢයᱥၽᔾ⦽Ḳᵲ⪙ᬑ᪡7ᬵ11ᯝᇡ░
7ᬵ13ᯝʭḡၽᔾ⦽Ḳᵲ⪙ᬑa࠺ၹࡹᨕᯕᵲ℉ࢱ⩶┽᮹ᙹྙ
łᖁᯕၽᔾ⦹ᩡ݅. ᨱ᭥ܩᦥ۵ᰍᔑ⦝⧕a18,344ᨖᬱၽᔾ⦹ᩡ
(a) Gangjeong-Goryeong (b) Dalseong
(c) Habcheon-Changnyong (d) Changnyong-Haman
Fig. 3. Cross-Section of Weir
(a) Discharge (b) Stage
Fig. 4. Boundary Condition
ᮝ໑ ᯕ۵ 1904֥ᇡ░ 2009֥ʭḡ ၽᔾ⦽ ┽⣮ᔍᔢ ᵲ 3᭥ᨱ
⧕ݚ⦽݅(ǎa┽⣮ᖝ░, 2011).
2.3 ऀ୨ࠑැজଭෂ૬ন
ᝅᱽᯱᩑᨱᕽ}ᙹಽ⮱ᮡeᨱݡ⧕ᄡ⦹۵ᇡᱶඹᯕ݅.
⦹⮱ᇥᕾ᮹Ğᬑ, ᇡᱶඹ᪡ᱶᔢඹ۵ᙹ⊹༉᮹đŝᨱⓑ
₉ᯕa ၽᔾ⦽݅. ᱶᔢඹ۵ eᨱ ෙ ⮱ ᄡ⪵ෝ Łಅ⦹ḡ
ᦫᦹʑভྙᨱ⮱ᱥᯕaၹᩢࡹḡᦫᦥ, ᇡᱶඹᨱእ⧕ᔢݡᱢᮝ ಽ℉ࢱᮁపᨱᕽⓑsᮥࠥ⇽⦽݅. ᕽ, ⦹ᱽႊᖅĥ᮹ᦩᱥ⊂
ᨱᕽᅙ݅໕ྙᱽaᨧḡอ, ᖅĥእᬊၰ⦹᮹⬉ᮉᱢᬕᩢ⊂໕ᨱ ᕽ۵ྙᱽᱱᯕၽᔾ⧁ᙹᯩ݅. ᬑ⬉ᖎ(2002)ŝASCE(1996)ᨱᕽ ۵⦹ᙹ᭥aeᨱݡ⧕ɪĊ⦹íᄡ⪵⦹Ñӹ, ⦹ᔢĞᔍa
ๅᬑ᪥อ⦹ᩍ႑ᙹ᭥⬉ŝav⦹íӹ┡ԁĞᬑ⦹ԕ⮱ᮥ
ᇡᱶඹಽ⧕ᕾ⧁äᮥǭŁ⦽ၵᯩ݅. 4ݡvᔕญʑᔍᨦᮥ☖⧕
Fig. 5. Relationship of k and n
Fig. 6. Comparison of Results Calculated by HEC-RAS Using Equation 1(Hwaweon Gauging Station)
⦹ࠥԕ݅ʑ܆ᅕaᖅ⊹ࡹᨩʑভྙᨱ, ݅ʑ܆ᅕ᮹a࠺ᅕၰŁᱶ ᅕᨱෙᱡඹ⬉ŝaၽᔾ⦹໑, ᵡᖅᨱෙɪĊ⦽⪹Ğᄡ⪵ಽ
⦹ᙹ᭥aeᨱݡ⧕ɪĊ⦹íᄡ⪵⧁ᙹᯩ݅. ᕽ, ᅙ
ᩑǍᨱᕽ۵HEC-RASෝᯕᬊ⦹ᩍᇡᱶඹ⮱⧕ᕾᮥᙹ⧪⦹ᩡ
݅. ʡᕽᵡ॒(2012)ᮡᇡᱶඹᙹญᝅ⨹ᮥᙹ⧪⦹ᩍHEC-RAS᮹
ᇡᱶඹᙹ⊹༉᮹ᱢᬊᖒᮥá☁⦽đŝ, ᙹ᭥đŝ᮹᪅₉۵ᱡᮁప ᨱᕽ1 mm, Łᮁపᨱᕽ2 mm᮹ᙹ᭥₉(3%)aၽᔾ⦹ᩡŁᮁపᮡ
↽ݡ1%᪅₉aၽᔾ⦹ᩍᱥၹᱢᮝಽHEC-RASaᇡᱶඹ⮱
ᄡ⪵ෝ ᱶ⪶⦹í ༉᮹⦹۵ äᮝಽ ⠪a⦹ᩡ݅.
3. ᙹญ✚ᖒᇥᕾၰŁₑ
3.1 ౖୡ࠻Թ࣡ॺ୨ࢫՑஹ
⮱ᨱݡ⦽⦹ࠥ᮹ᱡ⧎ᱶࠥෝ⢽⦹۵᳑ࠥĥᙹ۵⦹᮹
ᮁపၰᙹ᭥ෝđᱶḴ۵aᰆᵲ⦽ᙹ⊹ᵲ᮹⦹ӹᯕ໑᳑ࠥĥᙹ ᮹sᨱ᮹⧕ᙹ᭥᮹ᔢၰ⦹vᯕđᱶࡽ݅. ᳑ࠥĥᙹ۵ᙹ⊹༉᮹
đŝᨱ ၝq⦹ʑ ভྙᨱ ⦹᮹ ᖅĥ⪮ᙹ᭥ đᱶᨱ ෙ ᱽႊ
ᖅĥᙹ᭥᮹ŝݡੱ۵ŝᗭᔑᱶᮝಽᖅĥእᬊၰᱽႊ᮹ᦩᱥᨱ
ᩢ⨆ᮥ ၙ⋁ ᙹ ᯩ݅. ᳑ࠥĥᙹ۵ ʑᅙᱢᮝಽ۵ ⦹ᔢ᮹ ✚ᖒᨱ
᮹⧕đᱶࡹḡอ⦹⮱ᮥĥᔑ⧁Ğᬑᔾ, Ǎ᳑ྜྷ, ᔍ⧪,
⦹ᔢᄡ⪵, ᮁᔍప, ᙹ᭥, ᮁప॒᮹݅᧲⦽ᯙॅᮥ᳑ࠥĥᙹᨱ
ၹᩢ┍ᙹᯩ݅. ᯕ᪡zᯕ᳑ࠥĥᙹsᨱ۵⮱ᨱݡ⦽ᇩ⪶⦽
ᗭॅᯕᩍ్aḡ༉᧲ᮝಽ}᯦ࡹᨕᯩ݅. ᳑ࠥĥᙹෝᔑᱶ⦹۵
ႊჶᮝಽ۵ᙹ⊹༉⩶ᮥᯕᬊ⦹ᩍ š⊂ᙹ᭥ၰĥᔑᙹ᭥እƱෝ
☖⧕᳑ࠥĥᙹෝᔑᱶ⦹۵ႊჶŝ, Cowan(1956)ŝChow(1959) ᮹ࠥ⢽ෝᯕᬊ⦹۵ႊჶ, ʑ᳕⦹ᖅĥᨱᕽᔍᬊ⧩᳑ࠥĥᙹෝ
ₙŁ⦹ᩍš⧪ᱢᮝಽᱢᬊ⦹۵ႊჶᯕᯩ݅. Manning᮹᳑ࠥĥᙹ ۵ᅕ☖nᮝಽ⢽⦹ᩍᔍᬊ⦹ḡอ⦹}ᙹŖᔍa᪥ഭࡽᅖ݉໕
⦹ࠥ᮹Ğᬑᨱ۵⧊ᖒ᳑ࠥĥᙹ, ᷪᱡᙹಽ᪡⪮ᙹ░ෝ⧊ᖒ⦽᳑ࠥ
ĥᙹෝNᮝಽ⢽⦹ᩍᔍᬊ⦹ʑࠥ⦽݅. ᝅྕᨱᕽ۵☖ᔢᱢᮝಽ
⦹ᱶእʑᅙĥ⫮ᅕŁᕽᨱʑᰍࡹᨕᯩ۵sᮥᯕᬊ⦹Ñӹʑ᳕
⦹ᖅĥᨱᕽᔍᬊ⦹⧊ᖒ᳑ࠥĥᙹෝ⪽ᬊ⦹Łᯩ݅. ᯕ్⦽
ႊჶᮡᖅĥ⪮ᙹ᭥ෝᔑᱶ⦹ʑ᭥⦹ᩍ℉ࢱᮁపᮥᯕᬊ⦹ᩍᔑᱶ
⦹ᩡÑӹ1₉ᬱ༉⩶ᨱǎ⦽ࡹᨕᔑᱶࡽsᯕʑভྙᨱᇡᱶඹ
ྙᱽෝ⧕ᕾ⦹Ñӹ݅₉ᬱᙹ⊹༉ߙยᮥᯕᬊ⦽ᱶၡ⦽ᙹ⊹á☁
ᨱ ݡ⦽ ྙᱽᱱᮥ aḡŁ ᯩ݅.
✚⯩, ᅙ ᩑǍᨱᕽ ḥ⧪⦹Łᯱ ⦹۵, 4ݡvᔕญʑ ᔍᨦ ᱥŝ
⬥ᵡᖅၰᙹญᖅྜྷᬕᩢᨱෙᙹญ✚ᖒá☁ෝ⦹ʑ᭥⧕ᕽ۵
ᔍᨦ⬥᳑ࠥĥᙹsᯕ⦥⦹݅. ⦹ḡอ, ᵡᖅ⬥ᄡ⪵⦹íࡹ۵
᳑ࠥĥᙹsᮥ⇵ᱶ⧁ᙹᨧ݅. ᕽ, ᅙᩑǍᨱᕽ۵Manning᮹
᳑ࠥĥᙹaᦥܭ, ᳑Łs(Roughness height k)ᮥ₥┾⦹ʑಽ⦹ᩡ
݅. Strickler(1923)ᨱ ᮹⧕ ᱽᦩࡽ ᳑Łsᮡ Manning ĥᙹ᪡
ݍญྜྷญᱢᯙ᮹ၙa⪶ᝅ⦹݅. ᯕĥᙹ۵Ğĥ໕᳑ࠥ׳ᯕ᮹
1/6 ᨱ እಡ⦹ʑ ভྙᨱ ᳑ࠥ ׳ᯕ ⇵ᱶᨱᕽ ⓑ ᪅₉ෝ ԕࠥ
əđŝᨱ۵ⓑᩢ⨆ᮥၙ⊹ḡᦫ۵݅(ᬑ⬉ᖎ, 2002). Nassar(2011) ۵ Nile vᮥݡᔢᮝಽManning ᳑ࠥĥᙹ᪡᳑Łsᮥbbᱢᬊ⦹
ᩍ ⦹ࠥ⮱⧕ᕾᨱ ݡ⦽ ๅ}ᄡᙹ ၝqࠥ ᇥᕾᮥ ᙹ⧪⦽ đŝ,
᳑Łsᮥᱢᬊ⧁Ğᬑᮁᗮ⮱ᩩ⊂᮹ᱶ⪶ᖒᯕ⨆ᔢࡽ݅Ł⠪a
⦽ၵᯩ݅. Thoman and Nisbet(2007)ᮡ⪮ᙹ⮱ᨱݡ⦽ᙹ⊹༉
᮹Manning ᳑ࠥĥᙹᨱእ⧕᳑Łsᯕᙹ᭥ᄡ⪵ᨱݡ⦽ᄡ⪵ෝ
ᅕ݅Łಅ⦽݅Ł⠪a⦹ᩡ݅. Manning nᨱݡ⦽Strickler᮹
ႊᱶᮡᯕ⬥ᨱNikuradse(1933)ᨱ᮹⧕ᕽ༉௹᯦ᯱⓍʑෝᯕᬊ
⦽ᝅ⨹ᮥ☖⧕š᮹ษₑĥᙹෝᱶᖒᱢᮝಽŁᯱࠥ⦹ᩡŁ, Williamson(1951)۵ Nikuradse(1933)᮹ ᩑǍđŝෝ ၵ┶ᮝಽ
Eq. (1)ŝ zᮡ nŝ k᮹ šĥᮥ ᱽᦩ⦹ᩡ݅(Fig. 5).
ƌ á ƉÞÎîÓßîÏÓíÑ (k in meters) (1)
ᅙᩑǍᨱᕽ۵Ӻ࠺v⦹ᱶእʑᅙĥ⫮(ǎ☁⧕᧲ᇡ, 2009b)ᨱ
ᙹพࡹᨕᯩ۵᳑ࠥĥᙹnᮥEq. (1)ᮥᯕᬊ⦹ᩍ᳑Łsᮝಽ⪹ᔑ
Table 2. The Set of Simulated Scenarios
Case Bed condition Weir operation condition Analysis condition
1 Before - Unsteady flow
2 After Full open gate Unsteady flow
3 After Closed gate Unsteady flow
4 Before - Steady flow
Fig. 7. Roughness Height k
(a) Hwaweon (b) Goryeonggyo (c) Hyeonpung
(d) Jeokpogyo (e) Jindong
Fig. 8. Results Simulated for the Case 1 Using HEC-RAS ᱢᬊ⦹ᩡᮝ໑, 2006֥┽⣮“ᨱ᭥ܩᦥ” ᔍᔢᮝಽᇡᱶඹ༉᮹ෝ
ᙹ⧪⦹ᩍ⪵ᬱᙹ᭥⢽ḡᱱᨱᕽ᮹ᙹ᭥đŝෝእƱ⦹ᩡ݅(Fig. 6).
Williamson(1951)ᨱ᮹⧕ᱽᦩࡽᄡ⪹ᮡá☁đŝ, Manning nŝ᳑Łsᱢᬊᨱෙᙹ᭥đŝ᮹₉ᯕaၽᔾ⦹ḡᦫᦹʑভྙᨱ
┡ݚ⦽ äᮝಽ ❱݉ࡹᨩ݅.
3.2 ܑஜডࢫۗ׆ۇ࣪ઽݗࠛࠤন
⦹ࠥᵡᖅၰ݅ʑ܆ᅕᬕᩢᨱෙᙹ⊹༉᮹ӹญ᪅ᖅᱶᮡ
Table 2᪡z݅. Case 2۵༉ुᙹྙᯕ}ႊࡹᨕᯩ۵᳑Õᮥᱢᬊ⦹
ʑ᭥⧕Time Series Gate Openings᪖ᖹᨱᕽᙹྙ᮹׳ᯕෝ0mᮝ ಽᖅᱶ⦹ᩡ݅. 1₉ᬱ⦹ࠥ⇵ᱢ, ĥᩕvᬑ, ᙹ᭥, ᮁపŝ
zᮡᔢඹĞĥ᳑Õᮡᙹญ༉⩶᮹ᦩᱶ⪵ෝ᭥⧕ᔢඹᨱᕽᮁ᯦ࡹ
۵↽ᗭᮁపᮥ300 ⽎/secಽᱢᬊ⦹ᩡᮝ໑↽ᗭᮁపᯕ⦹᮹ᮁపᮡ
↽ᗭᮁపᮝಽݡℕ⦹ᩡ݅. ᳑ŁsᮡEq. (1)ᮥᯕᬊ⦹ᩍ⪹ᔑࡽ
sᮥ⦹ࠥ᪡⪮ᙹ░ෝǍᇥ⦹ᩍᱢᬊ⦹ᩡ݅(Fig. 7). ༉᮹ʑeᮡ
2006֥7ᬵ8ᯝᇡ░2006֥7ᬵ25ᯕ໑, ⪹ᔑࡽ᳑Łsᮥᱢᬊ⦹
ᩍĥᔑࡽCase 1᮹ᙹ⊹༉᮹đŝ۵Fig. 8ŝz݅. bᙹ᭥š⊂ᗭ
Table 3. The Review of Reproducibility for Models
Statistics method Hwaweon Goryeonggyo Hyeonpung Jeokpogyo Jindong
RMSE(m) 0.994 1.280 1.186 1.153 0.658
NSEC 0.960 0.920 0.936 0.910 0.964
Table 4. Specifications of Results Simulated for Scenario Using HEC-RAS
Station Max Value Case 1 Case 2 Case 3 Case 4
Hwaweon
Discharge(/sec) 12,921 12,877 13,193 13,340.8
Stage(m) 23 21.6 22.1 23.91
Velocity(m/sec) 2.1 2.3 2.3 1.98
Goryeonggyo
Discharge(/sec) 12,832 12,278 13,165 13,340.8
Stage(m) 21.6 20.2 20.7 22.52
Velocity(m/sec) 2.3 2.5 2.5 2.17
Hyeonpung
Discharge(/sec) 12,808 12,276 12,991 13,340.8
Stage(m) 21 19.5 19.6 21.91
Velocity(m/sec) 2.5 2.6 2.8 2.33
Jeokpogyo
Discharge(/sec) 14,332 14,268 14,273 15,910.3
Stage(m) 17.3 16.6 16.6 18.34
Velocity(m/sec) 2.6 2.5 2.5 2.62
Jindong
Discharge(/sec) 17,109 17,023 17,042 18,726
Stage(m) 13 12.8 12.9 13.72
Velocity(m/sec) 3.5 3 3 3.6
ᄥಽᱶపᱢ☖ĥʑჶᨱɝÑ⦹ᩍš⊂ĥᩕᯱഭ᪡ĥᔑđŝෝ
ᯕᬊ⦹ᩍ ⠪ɁᱽŒɝ᪅₉(Root mean square error, RMSE)᪡
Nash-sutcliffe ⬉ᮉĥᙹ(Nash-sutcliffe efficiency coefficient, NSEC)ಽᇥᕾ⦹ᩡ݅. ⠪ɁᱽŒɝ᪅₉۵⢽ᵡ⠙₉᮹ᯝၹ⪵ࡽ
ᮝಽᝅᱽsŝ⇵ᱶs᮹₉ᯕaษᯙaෝᙹᯩ۵ᙹ⊹ಽ៉
0ᨱɝᱲ⧁ᙹಾᱶ⪶ᖒᯕ׳ᮡäᮥ᮹ၙ⦹໑ᯕ᪡۵ၹݡಽNash- sutcliffe ⬉ᮉĥᙹ۵ ⇵ᱶ⊹᪡ ᝅ⊂⊹a ᯝ⊹⦹໕ 1.0ᯕŁ, ə
sᯕ0ŝ1.0 ᔍᯕᨱᯩᮝ໕⇵ᱶ⊹ෝᔍᬊ⦹۵äᯕᝅ⊂⊹᮹
⠪Ɂᮥᯕᬊ⦹۵äᅕ݅ᳬᮡđŝෝᮥᙹᯩ݅. ੱ⦽, 0ᅕ݅
᯲ᮝ໕༉⩶᮹⇵ᱶđŝaӹᒹÑӹᝅ⊂ᯱഭaᯝšᖒᯕᨧᮭᮥ
᮹ၙ⦽݅. bႊჶᮡš⊂ĥᩕᯱഭ᪡b༉⩶ᄥĥᔑđŝෝ
ᯕᬊ⦹ᩡᮝ໑bႊჶᄥᔑ⇽ᮡ(2)᪡(3)ŝz݅. Table 3ᮡ
HEC-RAS ༉⩶ᮝಽĥᔑࡽđŝෝRMSE᪡NSECಽᇥᕾ⦽
đŝᯕ݅. b ᙹ᭥š⊂ᗭ ᄥಽ ᇥᕾ đŝ, ḥ࠺ᙹ᭥⢽ḡᱱᨱᕽ
aᰆ᯲ᮡ᪅₉aၽᔾ⦹ᩡᮝ໑, ŁಚƱᙹ᭥⢽ḡᱱᨱᕽaᰆⓑ
᪅₉aၽᔾ⦹ᩡ݅. ༉ुᙹ᭥⢽ḡᱱᨱᕽNSECa0.9 ᯕᔢ᮹
đŝaӹ┡ԍʑভྙᨱᙹ⊹༉⩶ᨱ᮹⦽đŝ᮹ᝁࠥa׳݅Ł
⧁ ᙹ ᯩ݅. ᇡᇥᱢᮝಽ ᱡᙹ᭥ᯝ Ğᬑ, š⊂ sŝ ᇩᯝ⊹⦹۵
ᇡᇥᨱݡ⧕ᕽ۵ᩍ్aḡᯙᯕᯩᮥᙹᯩ۵ߑ, əᬱᯙᮝಽ۵
⦹⩶ᔢ᮹ ᇩᯝ⊹᪡ ḡඹ ᮁ᯦ᮁప ᔑ⇽ᨱᕽ ၽᔾ⧁ ᙹ ᯩ۵
᪅₉Ł ❱݉ࡽ݅.
«¦¬ áöćć§ÎāƇ á Îƌ Þ¨Ƈà ±ƇßÏ (2)
§¬ á Î à ć
āƇ á Î
§ Þ¨Ƈà ¨¦ßÏ
āƇ á Î
§ Þ¨Ƈà ±ƇßÏ
(3)
ᩍʑᕽ,¨Ƈ۵š⊂ᙹ᭥,±Ƈ۵ĥᔑᙹ᭥, Nᮡߑᯕ░}ᙹ,¨¦۵
š⊂⠪Ɂsᯕ݅.
Table 4᪡ Fig. 9۵ ӹญ᪅ᨱ ෙ ᙹญ✚ᖒᮥ Caseᄥಽ
ᇥᕾ⦽ đŝෝ ࠥ⦽ äᯕ݅. Case 1~3ᮥ ᇥᕾ⦽ đŝ, ᔍᨦ
ᱥŝ⬥⦹ࠥᵡᖅᨱෙ⦹ᔢᄡ⪵ಽʑࡹ۵ᮁప, ᙹ᭥, ᮁᗮ᮹
ၝqࠥa ⦹ඹ ᅕ݅ ᔢඹ ḡᱱᨱᕽ Ⓧí ӹ┡ԍŁ, ᔍᨦ ⬥
⦹ᔢ݉໕ᨱᕽ᮹a࠺ᅕ}⠱ᨱෙᮁప, ᙹ᭥, ᮁᗮ᮹ၝqࠥ۵
⪵ᬱၰŁಚƱᙹ᭥⢽ḡᱱᨱᕽⓍíӹ┡ԍ݅. ᔍᨦᱥŝᔍᨦ
⬥ᙹ᭥đŝෝእƱ⦹໕, 0.2~1.5 m ჵ᭥ᨱᕽᙹ᭥ᱡ⦹⬉ŝa
ӹ┡ԍᮝ໑݅ʑ܆ᅕ᮹ᙹྙᮥŁᬕᩢ⧁Ğᬑᱡᙹ᭥ᨱᕽšญ
(a) Hwaweon (b) Goryeonggyo (c) Hyeonpung
(d) Jeokpogyo (e) Jindong
Fig. 9. Results of Water Level Simulated for Scenario Using HEC-RAS
ᙹ᭥a⩶ᖒࡹ۵äᮥᙹᯩᨩᮝӹ, Łᙹ᭥ᨱᕽ۵ᙹྙ}⠱ᨱ
ෙᙹ᭥ᩢ⨆ᮡⓍḡᦫᮡäᮝಽӹ┡ԍ݅. ݅ʑ܆ᅕ۵Łᱶᅕ᪡
a࠺ᅕಽ ᖅĥࡹŁ ᯩᮝӹ, Łᱶᅕ᮹ ᔢ݉ᇡa ĥ⫮⦹ᔢŁᅕ݅
׳ᮡĞᬑ۵ၹऽ⦹⡎᮹ᱥ݉໕ᮥa࠺ᅕಽᖅĥ⧕⦹ḡอ, ᯝᇡ⬂݉Ǎeᨱᕽอa࠺ᅕෝᖅ⊹⦹ᩡʑভྙᨱ⪮ᙹa࠺ᅕ ᮹ᬕᩢᯕๅᬑᨕಖŁa࠺ᅕᬕᩢᨱෙ℉ࢱᙹ᭥ᱡ⦹⬉ŝ۵
Ⓧḡᦫᮡäᮝಽӹ┡ԍ݅. ᯕෝ᳦⧊ᱢᮝಽŁಅ⧕ᅝভ, ݅ʑ܆
ᅕᬕᩢᮥ☖⦽⬉ŝ᷾ݡ۵⊹ᙹᅕ݅۵ᯕᙹᨱᵲᱱᮥࢱᨕᩑǍෝ
ḥ⧪⦹۵äᯕၵ௭Ḣ⦹݅Ł❱݉ࡹ໑, ⪮ᙹʑ݅ʑ܆ᅕᬕᩢᮡ
a࠺ᅕෝ༉ࢱ}ႊ⦽ᔢ┽ᨱᕽᬕᩢ⦹۵äᯕ┡ݚ⦹݅Łᔍഭࡽ
݅. ᮁᩎᮁ⇽ᙹྙłᖁ᮹℉ࢱᮁపᯕĥᗮᮁ᯦ࡹ۵äᮝಽaᱶ⦹
ᩍᱶᔢᔢ┽ಽ༉᮹⦽Case 4۵⪮ᙹ❭᮹qᙁ⬉ŝ॒ᯕྕࢉᮝ ಽ៉Case 1ᨱᕽᔑᱶࡽ⪮ᙹ᭥ᅕ݅᧞1 m aపᙹ᭥aŝݡ
⇵ᱶࡹᨩ݅. ᱥĞᙹ॒(2005)ᮡᇡ॒ඹ༉⩶ᨱ᮹⦽⪮ᙹ᭥ĥᔑđ ŝa ᇡᱶඹ ༉⩶᮹ s ᅕ݅ 0.2~1.0 m ᱶࠥ Ⓧí ᔑᱶࡽ݅۵
ᩑǍđŝෝၽ⢽⦽ၵᯩᮝ໑, ᯕ۵⪮ᙹపᯕ50% ᱶࠥ᷾a⦹ᩡᮥ
ভ᪡ ݡ॒⦽ đŝŁ ⦹ᩡ݅.
Fig. 10ᮡCaseᄥvᱶŁಚᅕ, ݍᖒᅕ, ⧊ֶᅕ, ֶ⧉ᦩᅕ ᮹Ḣᔢඹᮁ᯦ᮁᗮᮥࠥ⦽äᯕ݅. ᱡᮁపᯕᮁ᯦ࢁভCase 1ᨱ እ⧕ Case 2᪡ Case 3᮹ Ğᬑ ᮁᗮᯕ ᯲ᦥḡ۵ äᮥ
ᙹ ᯩᨩ݅. Case 2۵ Fig. 9ᨱ ࠥࡽ ၵ᪡ zᯕ ᵡᖅᨱ ᮹⧕
ԏᦥḥ⦹ᔢŁᨱᕽ݅ʑ܆ᅕ᮹a࠺ᅕa}ႊࡹᨕᮁ᯦ࡹ۵ᮁప ᯕᱡඹ⬉ŝᨧᯕ⦹ඹಽᮁ⦹ࡹᨕᙹᝍᯕԏᦥᲭʑভྙᨱᮁᗮࠥ
ᱡ⦹ࡽäᮝಽ❱݉ࡽ݅. ੱ⦽, Case 3᮹Ğᬑ݅ʑ܆ᅕ᮹šญᙹ᭥
ᬕᩢᨱ ᮹⧕ ⮱ᯕ ᱶℕࡹᨕ ᮁᗮᯕ qᗭࡽ äᮝಽ ❱݉ࡹ໑,
ᮁᗮ᮹ᱡ⦹۵⦹ᔢᨱ᯲ᬊ⦹۵ᱥ݉᮲ಆᮥ qᗭ┅ʑভྙᨱ
⠪Ɂ⦹ᔢ᮹ᱥ݉᮲ಆᯕ⦹ᔢǍᖒྜྷḩ᮹⦽ĥᱥ݉᮲ಆᨱ⦥⦽
᮲ಆᅕ݅ ᯲ᮡ Ğᬑ ᮁ᯦ࡽ ᮁᔍa ♕ᱢࢁ äᮝಽ ᩩᔢࡽ݅.
ᅙᩑǍᨱᕽᱢᬊ⦽Case 2᪡Case 3ᮡḡ⩶᳑Õᮥĥ⫮݉໕ᮝ ಽᱢᬊ⦹ᩡʑভྙᨱᝅᱽᔢ⫊ŝ݅ෝᙹᯩ݅. ᕽ, ⦹ࠥ᪡
⪮ᙹ░ᨱݡ⦽⩥⫊⊂పᮥ☖⧕≉ाࡽḡ⩶Ŗeᱶᅕෝᱢᬊ⦹ᩍ
⇵aᱢᯙá☁a⦥⧁äᮝಽ❱݉ࡽ݅. ੱ⦽, ⨆⬥݅᧲⦽a࠺ᅕ
}⠱ӹญ᪅ᨱෙᙹญ✚ᖒᩢ⨆ၰ⦹ᔢÑ࠺ᇥᕾᮥᙹ⧪⦹ᩍ
4ݡvᔕญʑ ᔍᨦᮝಽ ɪᄡ⦽ ⦹⪹Ğᨱ ݡ⦽ ŝ⦺ᱢ ྜྷ⪹Ğ
(a) Gangjeong-Goryeong (b) Dalseong
(c) Habcheon-Changnyong (d) Changnyong-Haman
Fig. 10. Results of Velocity Simulated for Scenario Using HEC-RAS
šญℕĥෝ⪶ᅕ⦹Łʑ⬥ᄡ⪵॒ᔩಽᬕ⪹Ğྙᱽᨱᖁᱽᱢᮝಽ
ݡ᮲⦹ʑ᭥⦽ᔾ┽ᱢᩢ⨆, ݅ʑ܆ᅕԕ┢ᙹ᪡᳑ඹၽᔾ, ᮁᔍ⋉ᱥ
⧕ ⧁ äᮝಽ ᔍഭࡽ݅.
4. đು
ᅙ ᩑǍᨱᕽ۵ 4ݡvᔕญʑᔍᨦᮥ ☖⧕ ᄡ⪵ࡽ ⦹ࠥḡ⩶ ၰ
ᙹญǍ᳑ྜྷᬕᩢᨱ᮹⦽ᩢ⨆ᮥá☁⦹ʑ᭥⧕༉⩶ᮥǍ⇶⦹Ł
2006֥┽⣮“ᨱ᭥ܩᦥ” ᔍᔢᮥݡᔢᮝಽ1₉ᬱᇡᱶඹ⮱⧕ᕾ
ᮥ☖⦽ᙹญ✚ᖒᮥᇥᕾ⦹ᩡ݅. ᱶඹ᪡ᇡᱶඹ⮱⧕ᕾ, ᳑ࠥĥᙹ
᪡᳑Łs᮹šĥ, ᔍᨦᱥŝ⬥⦹݉໕əญŁᙹྙᬕᩢᨱ
ෙ⦹⮱ᨱݡ⧕݅bࠥಽᩑǍෝ⦹ᩡᮝ໑əđುᮡ݅ᮭŝ
z݅.
(1) ᱶᔢඹ᮹Ğᬑeᨱෙ⮱ᄡ⪵aŁಅࡹḡᦫʑভྙᨱ
⮱ᱥᯕaၹᩢࡹḡᦫᦥ, ᇡᱶඹᨱእ⧕ᔢݡᱢᮝಽ℉ࢱ
ᮁపၰᙹ᭥ᨱᕽⓑsᮥࠥ⇽⦹໑ᔍᨦᱥ݉໕ᮝಽ⮱⧕ᕾ
ᮥᙹ⧪⦽đŝ, bᙹ᭥⢽ḡᱱᄥಽᮁపᮡ419.8~1617 ⽎/sec, ᙹ᭥۵ 0.72~1.04 m ŝݡ ᔑᱶ⦹۵ äᮝಽ ӹ┡ԍ݅.
(2) 4ݡvᔕญʑᔍᨦᱥŝ⬥ᵡᖅၰᙹญᖅྜྷᬕᩢᨱෙ
ᙹญ✚ᖒá☁ෝ⦹ʑ᭥⧕ᕽ۵ᔍᨦ⬥᳑ࠥĥᙹsᯕ⦥⦹
ḡอ, ᵡᖅ⬥ᄡ⪵⦹íࡹ۵᳑ࠥĥᙹsᮥ⇵ᱶ⧁ᙹᨧʑ
ভྙᨱᅙᩑǍᨱᕽ۵Williamson(1951)ᨱ᮹⧕ᱽᦩࡽᄡ⪹
ᮥᯕᬊ⦹ᩍManning᮹᳑ࠥĥᙹᨱᕽ᳑Łs(Roughness height k)ᮝಽᄡ⪹ᱢᬊ⦹ᩡŁ2006֥┽⣮“ᨱ᭥ܩᦥ” ᔍᔢ ᮝಽᇡᱶඹ༉᮹ෝᙹ⧪⦹ᩍ⪵ᬱᙹ᭥⢽ḡᱱᨱᕽ᮹ᙹ᭥đŝ
ෝእƱ⦽đŝ, Williamson(1951)ᨱ᮹⧕ᱽᦩࡽᄡ⪹ᮡ
ᱢ⧊⦽ äᮝಽ ❱݉ࡹᨩ݅.
(3) ᔍᨦᱥŝ⬥᮹⦹݉໕⮱⧕ᕾᮥᙹ⧪⦽đŝ, ᔍᨦᱥᅕ݅
ᔍᨦ⬥ᙹ᭥a0.2~1.5 m ჵ᭥ᨱᕽᱡ⦹ࡹ۵äᮝಽӹ┡ԍ݅.
ᙹྙᬕᩢᨱෙᱡᙹ᭥᪡Łᙹ᭥ᨱᕽ᮹ᩢ⨆ᮡCase 2᮹
Ğᬑᱡᙹ᭥ᨱᕽ۵šญᙹ᭥aᮁḡࡹ۵äᮥ⪶ᯙ⦹ᩡŁ, Ł ᙹ᭥ᨱᕽ۵Case 2᪡Case 3᮹ᙹ᭥a0~0.5 m᮹ჵ᭥ᨱᕽ
ᙹ᭥₉a ၽᔾ⦹ᩡ݅. Łᙹ᭥ᨱᕽ᮹ ᙹྙ}⠱ᨱ ෙᙹ᭥
ᩢ⨆ᮡⓍḡᦫᮡäᮝಽӹ┡ԍ݅. ə్ӹ, ᱡᮁపᨱᕽCase 2᪡Case 3ᮡᮁᗮ᮹qᗭಽᮁᔍ♕ᱢᯕၽᔾ⧁äᮝಽᩩᔢࡽ
݅.
(4) ݡȽ༉☁༊Ŗᔍ॒ᮝಽᄡ⪵ࡽ⦹⪹Ğ᮹ᙹญ, ᙹḩ, ᮁᔍ,
⊽ᙹŖeᦩᱶᖒá☁॒ᱶపᱢᇥᕾᮥ᭥⧕ᕽ۵⨆⬥, ĥ⫮݉
໕ᯕᦥܭ, ᔍᨦ⬥⊂పࡽ⦹݉໕ᯱഭෝၹᩢ⧕ࢁäᯕ໑
ḡ⩶ᯱഭᐱอᦥܩ, ⦹ᱥၹᨱÙ⊽⦹ᔢŁ, ⦹ᔢ☁, ᮁᗮ, ᙹ᭥, ᔾᯕ, ᙹḩ, ᮁపᨱݡ⦽š⊂ᯕ࠺ၹࡹᨕ⧁äᯕ
݅. š⊂ࡽᙹญ✚ᖒᯱഭෝၵ┶ᮝಽᖁ݉᭥⦹šญᐱอ
ᦥܩ ໕ᱢᯙ }ֱ᮹ ⦹šญෝ ☖⧕ ǎᇡᱢᮝಽ ၽᔾ⧁
ᙹᯩ۵♕ᱢ, ᖙǕ, ⠙ᙹ᭥, ᔾᯕ॒ᮥŁಅ⦽⦹šญa
⦥⦹໑ᯕ۵ǎaᙹญǍ᳑ྜྷšญᨱᗭࡹ۵สݡ⦽ᯱᬱ
ᮥ ↽ᱢ⪵⦹Ł ᦩᱶᱢ ⦹šญෝ ᭥⦽ ʑⅩᯱഭಽ ⪽ᬊࢁ
ᙹ ᯩᮥ äᯕ݅.
qᔍ᮹ɡ
ᅙᩑǍ۵ǎ☁Ʊ☖ᇡÕᖅʑᚁ⩢ᝁᔍᨦ᮹ᩑǍእḡᬱ(11ʑᚁ
⩢ᝁC06)ᨱ ᮹⧕ ᙹ⧪ࡹᨩܩ݅.
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