Received September 18 2012, Revised November 12 2012, Accepted March 6 2013
Copyright ⵑ 2013 by the Korean Society of Civil Engineers
ǣǣȀȀǤǤȀͳͲǤͳʹͷʹȀ ǤʹͲͳ͵Ǥ͵͵Ǥ͵ǤͻͶ Ǥ ǤǤ
Ulyhu5GἺ#ⴲⱧ㬚#ᙗᦗᇓ0Ꮖ㯶ᇓ#㬧⌾ⴖ#⚛㚚Ⳟᶇ#♮ⷓ
ছଵ ȵࢮฅ
Seo, Il Won*, Park, Inhwan**
Determination of Ecological Flow at the Confluence of Nakdong River and Gumho River Using River2D
ABSTRACT
In this study, WUA (Weighted Usable Area) was calculated to determine ecological flow at the confluence of Nakdong River and Gumho River by using River2D. To calibrate River2D, simulation results of River2D were compared with calibrated HEC-RAS simulation results and the optimum parameters were determined. After parameter calibration, WUA of Zacco platypus and Zacco temmincki which are dominant species in Nakdong River was calculated with changing upstream flowrate. From the result, WUA is changed according to flowrate and growth stage. In the flowrate-WUA/A graph, ecological flow can be determined as 33.3 m3/s ~ 39.96 m3/s in Nakdong River and 3.6 m3/s ~ 4.32 m3/s in Gumho River. After dredging for Four major rivers restoration project, WUA of Zacco platypus and Zacco temmincki were calculated by using the ecological flow. The results show that WUA after dredging are decreased when compared with undredged condition. WUA of Common carp is 2 ~ 3 times bigger than WUA of Zacco platypus and Zacco temmincki at the dredged condition in Nakdong River.
Key words : River confluence, River dredging, Ecological flow, River2D, WUA
Ⅹಾ
ᅙᩑǍᨱᕽ۵Ӻ࠺v-ɩ⪙v⧊ඹᇡ᮹ᔾ┽ᮁపᮥᔑᱶ⦹ʑ᭥⧕2₉ᬱᙹ⊹༉⩶River2Dෝᯕᬊ⦹ᩍaᵲaᬊ໕ᱢ(WUA, Weighted Usable Area)ᮥĥᔑ⧩݅. River2D ༉⩶᮹á᷾ᮥ᭥⧕HEC-RAS༉᮹đŝ᪡እƱ⦹ᩍ↽ᱢๅ}ᄡᙹෝđᱶ⧩݅. əญŁӺ࠺v᮹ᬑᱱ᳦
ᯙ⦝ၙ᪡iĉܩෝݡᔢᮝಽӺ࠺vŝɩ⪙v᮹ᮁపᮥᄡ⪵┅໑aᵲaᬊ໕ᱢᮥ༉᮹⧩݅. ᮁప-WUA/A᮹ə௹⥥ಽᇡ░ᔾ┽ᮁపᮥ
ᔑᱶ⦽đŝ, Ӻ࠺v᮹Ğᬑ33.3 m3/s ~ 40.0 m3/s, ɩ⪙v᮹Ğᬑ3.60 m3/s ~ 4.32 m3/sෝӺ࠺v-ɩ⪙v⧊ඹᇡ᮹ᔾ┽ᮁపᮝಽđᱶ⦹
ᩡ݅. đᱶࡽᔾ┽ᮁపᮥᱢᬊ⦹ᩍӺ࠺vᅙඹ᮹⦹ᔢᵡᖅᯕ⬥⦝ၙ᪡iĉܩ᮹aᵲaᬊ໕ᱢᮥĥᔑ⦽đŝ, aᵲaᬊ໕ᱢᯕ᧞1/9ಽq ᗭ⧩݅. əญŁᵡᖅᯕ⬥ᨱᯪᨕᨱݡ⦽aᵲaᬊ໕ᱢᮡ⦝ၙ᪡iĉܩᨱݡ⦽äᅕ݅2 ~ 3႑ⓑäᮝಽĥᔑࡱ݅.
áᔪᨕ ḡ⧊ඹᇡ, ⦹ࠥᵡᖅ, ᔾ┽ᮁప, River2D, aᵲaᬊ໕ᱢ
1. ᕽು
ᬑญӹ᮹ ᩑ ⠪Ɂ vᙹపᮡ 1,283 mmಽ ᱥ ᖙĥ ⠪Ɂ, 973 mm᪡ እƱ⧕ ᧞ 1.3 ႑ ׳ᮡ ᙹᵡᯕӹ vᙹప᮹ ݡᇡᇥᯕ ⪮ ᙹʑᨱḲᵲࡹᨕᯩʑভྙᨱ, ⠪ᔢᨱ⦹ᨱ⮱۵ᮁపᯕ᯲ᦥᕽ⦹⪹Ğ᮹šญaᨕಅᬕᝅᱶᯕ݅. ᕽ⦹⪹Ğᮥᅕ᳕⦹໑
ᙹᯱᬱᮥ⬉ᮉᱢᮝಽᯕᬊ⦹ʑ᭥⦽⦹šญᮁపᮥđᱶ⦹۵äᯕᵲ⦽ྙᱽಽݡࢱࡹᨩ݅. ⦹šญᮁపᵲ⦹ᮁḡᮁపᮡ⦹ᙹḩᅕ
սėॡ
ᱥ, ᔾ┽ĥᅕ⪙, ⦹Ğšᅕᱥ॒ᮥ᳦⧊ᱢᮝಽŁಅ⦹ᩍđᱶ⧕
⦽݅. ੱ⦽⦹ᮁḡᮁపᮡᙹᯱᬱšญ⊂໕ᨱᕽᙹญၰᙹྙ⦺ᱢ
⪹ĞᯕⓍíᄡ⪵⦹ḡᦫ۵⦽ᄡ⪵⦹ḡᦫʑভྙᨱᱢᱩ⦽ʑᵡ ᨱ ᮹⧕ᔑᱶ⦹໕ ᯕ⬥ ḡᗮᱢᯙ⦹᮹ ᮁḡšญᨱ ࠥᬡᯕࢁ
ᙹᯩ݅. ⦹ᮁḡᮁపᨱݡ⦽ᩑǍ۵1970֥ᯕ⬥ၙǎŝᮁᨱᕽ
᯲ࡹᨩŁ⦹ᮁḡᮁప᮹đᱶႊჶᨱݡ⦽aᯕऽᯙᯕ}ၽࡹ
ᨕᙹᯱᬱšญෝ᭥⧕ᯕᬊࡹŁᯩ݅. ⦹ᮁḡᮁపᨱݡ⦽ᩑǍಽ ᕽ Bovee(1986)a }ၽ⦽ IFIM(Instream Flow Incremental Methodology)ᮡ⦹ᮁḡᮁపᔑᱶႊჶᮝಽǎԕᨱᕽձญ
ᯕᬊࡹŁᯩ݅. ǎԕᨱᕽ۵Kim ॒(1996)ᯕ⦹ᮁᩎ✚ᖒ, ᙹḩ, ᔾ┽ĥ॒ᮥŁಅ⦽⦹ᮁḡᮁపđᱶႊჶᮥᱽ⦽ᯕ⬥Woo
॒(1998)ᯕᬑญӹ᮹⦹⪹Ğᨱ฿۵ᮁḡᮁపᔑᱶჶᮥ}ၽ
⦹ᩍɩvᨱᱢᬊ⦹ᩡŁLee ॒(2006b)ᮡSWAT ༉⩶ᮥᯕᬊ⦹ᩍ
ᦩ᧲ ᮁᩎᨱᕽ᮹ ⦹ᮁḡᮁపᮥ ᔑᱶ⦽ ၵ ᯩ݅.
↽ɝᨱ۵⦹ᔾ┽ĥᨱݡ⦽šᝍᯕ׳ᦥḱᨱ⦹ᮁḡ
ᮁపᵲᔾ┽ᮁప᮹đᱶᨱݡ⦽ᩑǍa݅ᙹ᮹ᩑǍᯱॅᨱ᮹⧕
ᯕḡŁ ᯩ݅. ᔾ┽ᮁపđᱶᨱ ݡ⦽ ǎԕ ᩑǍ۵ ᵝಽ ḡᨱ ᕽᯕḡŁᯩᮝ໑1₉ᬱ༉⩶ᮥᯕᬊ⧕ᵝᨕ᳦᮹ᕽa܆
໕ᱢᮝಽᇡ░ᔾ┽ᮁపᮥᔑᱶ⦹۵ᩑǍaᵝෝᯕŁᯩ݅. Kang
॒(2004)ᮡᕽᱢ⧊ࠥʑᵡᮥᔑᱶ⦹Ł, 1₉ᬱ༉⩶ྜྷญᱢ
ᕽ༉᮹ᜅ▽ᯙ, PHABSIM(Physical HABitat SIMulation system)ᮥᯕᬊ⦹ᩍԉ⦽v᮹ᔾ┽ᮁపᮥᔑᱶ⦹ᩡŁ, Sung ॒ (2005)ᮡӺ࠺v᮹ᵝᨕ᳦ᮥ᳑ᔍ⦹ᩍᕽᱢ⧊ࠥʑᵡᮥ᯲
ᖒ⦹ŁPHABSIMᮥᯕᬊ⦹ᩍᵝḡ᮹ᔾ┽ᮁపᮥđᱶ⦽
ၵ ᯩ݅. əญŁ Lee ॒(2006a)ᮡ IFIMᨱ PHABSIMᮥ
ᯕᬊ⦹ᩍ⦽vݡ⢽ᨕ᳦᮹ ᨕඹᕽ⪹Ğᨱᱢ⧊⦽⦥ᮁపᮥ
ᔑᱶ⧩Ł, Hur᪡Kim(2009)ᮡɩv᮹ᬊݕݱ⦹ඹḡᩎᨱᕽᔾ┽
༉ܩ░ยᮥ☖⧕⦹Õvᖒᮥ⠪a⦹ŁPHABSIMᮥᯕᬊ⧕
↽ᱢ ᔾ┽ᮁపᮥ ᔑᱶ⧩݅.
ǎᨱᕽ۵2000֥ݡᯕ⬥⦹᮹Ǎ᳑ྜྷ, ḡ᮹ᮁ᯦॒ᨱ
ෙᨕඹ᮹ᕽa܆໕ᱢ᮹༉᮹ෝ᭥⧕2₉ᬱ༉⩶River2Dෝ
ᯕᬊ⦹۵ᩑǍa⪽ၽ⯩ḥ⧪ࡹŁᯩ݅(Scruton ॒, 2002; Diego
᪡Javier, 2007; Yi ॒, 2010). Wu᪡Mao(2007)۵River2D᮹
ᬑᙹᖒᮥ á☁⦹ʑ ᭥⧕ PHABSIMŝ River2D᮹ ༉᮹đŝෝ
እƱ⦹ᩍ ݉Ǎeᨱᕽ۵ River2Da ӹᮡ đŝෝ ࠥ⇽⧁ ᙹ
ᯩᮭᮥᵝᰆ⧩݅. ੱ⦽River2D۵ᙹŖǍ᳑ྜྷᯕᖅ⊹ࡽḡ⩶ᨱᕽ
ᨕඹ᮹ᕽa܆໕ᱢᮥ༉᮹⧁ᙹᯩʑভྙᨱᯕ༉⩶ᮥᯕᬊ⦹ᩍ
ᙹᱽ, ᯙŖᩍᬙ, ᭥ᨕ᪡zᮡ⦹Ǎ᳑ྜྷᯕᔾ┽ᕽᨱၙ⊹۵
ᩢ⨆ᨱݡ⦽ᩑǍaḥ⧪ࡹᨩ݅(Lacey᪡Millar, 2004; Lee ॒, 2010; Chou᪡ Chuang, 2011; Im ॒, 2011).
2000֥ݡ ⬥ၹᨱ۵ ǎԕᨱᕽࠥ 2₉ᬱ ᕽ ༉⩶ᮥ ☖⦽
ᨕඹᕽ༉᮹ᨱݡ⦽ᩑǍaḥ⧪ࡹŁᯩ݅. Oh ॒(2008)ᮡ
PHABSIMŝRiver2Dෝᯕᬊ⧕⦝ၙ᮹ᕽ໕ᱢᮥ༉᮹⦹
ᩍᔾ┽ᮁపᔑᱶđŝෝእƱ⦹ᩡᮝ໑Kang ॒(2011)ᮡݱᬕᩢ
ᔢ⫊ᨱෙᨕඹᕽ໕ᱢ᮹ᄡ⪵ෝRiver2Dෝᯕᬊ⧕༉᮹⦹
ᩍ ↽ᱢ ႊඹపᮥ đᱶ⧩݅. ᯕ᪡ zᯕ ↽ɝ ǎԕᨱᕽࠥ 2₉ᬱ
༉⩶ᮥᯕᬊ⦽ᔾ┽ᕽ༉᮹ᨱݡ⦽ᩑǍaḥ⧪ࡹŁᯩᮝӹ
ᯕෝ ᔾ┽ᮁప᮹ ᔑᱶᨱ ᱢᬊ⦹۵ ᩑǍ۵ ၙ⯂⦽ ᝅᱶᯕ݅.
ᅙᩑǍᨱᕽ۵Ӻ࠺v-ɩ⪙v⧊ඹᇡᨱᕽIFIMᨱᔾ┽ᮁ
పᮥᔑᱶ⦹ʑ᭥⦹ᩍᮁపᄡ⪵ᨱෙ aᵲaᬊ໕ᱢᮥĥᔑ⧩
݅. ༉᮹ᩢᩎᨱᕽ۵ɩ⪙vᯕ⧊ඹ⦹໑≉ᙹᅕၰvᱶŁಚᅕ᮹
Õᖅᨱෙ⮱ᄡ⪵aၽᔾ⦽݅. ᕽ⦹⮱᮹⦹⡎ႊ⨆
ᄡ⪵᪡aᵲaᬊ໕ᱢ᮹Ŗeᱢᄡ⪵ෝၹᩢ⦹ʑ᭥⧕1₉ᬱ༉⩶
PHABSIMᮥݡᝁ⦹ᩍ2₉ᬱᙹ⊹༉⩶River2Dෝᯕᬊ⦹ᩡ݅.
Ӻ࠺v-ɩ⪙v⧊ඹᇡᨱᱢ⧊⦽River2D᮹ๅ}ᄡᙹෝđᱶ⦹ʑ
᭥⧕࠺ᱱᖒĥᙹ(eddy viscosity)᪡ᮁ⬉᳑Ł(effective roughness height)ෝᅕᱶ⦹ᩡ݅. əญŁӺ࠺v᮹ݡ⢽ᨕ᳦ᯙ⦝ၙ᪡iĉ ܩᨱݡ⧕Ӻ࠺vᅙඹ᪡ɩ⪙v᮹ᮁపᄡ⪵ᨱෙaᵲaᬊ໕ᱢ
ᮥ༉᮹⦹ᩍIFIMᨱӺ࠺v-ɩ⪙v⧊ඹᇡᨱᕽ᮹ᔾ┽ᮁపᮥ
ᔑᱶ⧩݅. ᔑᱶࡽᔾ┽ᮁపᮥᵡᖅᯕ⬥᮹Ӻ࠺vᮁᩎᨱᱢᬊ⦹ᩍ,
⦝ၙ, iĉܩ᪡Ӻ࠺vᕽᨕ᳦ᵲᮁᗮᯕԏᮡḡᩎᨱᕽᕽ⦹
۵༉௹ྕḡ, ࠭Łʑ, ᯪᨕᨱݡ⦽aᵲaᬊ໕ᱢᮥእƱ⦹ᩍᵡᖅᨱ
᮹⦽ ᩢ⨆ᮥ á☁⦹ᩡ݅.
2. River2D ༉⩶
River2D۵ ⋱ӹ݅ Alberta ݡ⦺ᨱᕽ }ၽ⦽ 2₉ᬱ ᙹ⊹༉
⩶ᮝಽᕽ2₉ᬱ࠺ᙹᩎ⦺༉ऩŝᔾ┽ᕽ༉ऩᮥwŁᯩ݅.
River2D۵SU/PG(Streamwise Upwind Petrov-Galerkin)ʑჶ
ᮥᯕᬊ⦽ᮁ⦽ᗭ༉⩶ᮝಽᕽእᖁ⩶⧎ᮥ⣡ʑ᭥⦽ၹᅖ⧕ჶ ᮝಽNewton Rhapsonჶᮥᯕᬊ⦹Łᯩ݅. ࠺ᙹᩎ⦺༉ऩ᮹ᩑᗮ
ႊᱶŝᬕ࠺ႊᱶᮡbbEq. (1), Eq. (2)᪡z݅(Steffler᪡
Blackburn, 2002).
0
i i
q H
t x
∂ + =∂
∂ ∂ (1)
( ) 2 2 ( ) 1 ( )
i i j oi fi ij
j i j
q g H
q u gH S S H
t x x x τ
ρ
∂ + ∂ + ∂ = − + ∂
∂ ∂ ∂ ∂
(i, j = 1, 2) (2)
ᩍʑᕽH۵ᙹᝍ, uj۵ᙹᝍ⠪Ɂᮁᗮ, qi= Hui۵݉᭥ᮁప, Soi۵⦹ᔢĞᔍ, Sf i۵ษₑĞᔍ, g۵ᵲಆaᗮࠥ,τ ۵ӽඹᱥ݉᮲ij ಆ, ρ۵ ၡࠥᯕ݅.
Fig. 1. Status of the Nakdong River and Geumho River confluence (Ref.: NAVER satellite map)
River2D᮹ᔾ┽ᕽ༉ऩᮡ1₉ᬱ༉⩶ᯙPHABSIMŝ࠺
ᯝ⦽ aᵲaᬊ໕ᱢ}ֱᮥ ᯕᬊ⦹໑ Eq. (3)ŝ z݅.
1
WUA n i i
i S A
=
=∑ (3)
ᩍʑᕽ Ai۵ ᖡ iᨱ ⧕ݚ⦹۵ ᮁ⦽ᗭ᮹ ໕ᱢᯕŁ, Si۵ ᖡ
iᨱᕽ᮹ ᕽᱢ⧊ࠥḡᙹᯕ݅. Eq. (3)᮹ ᕽ ᱢ⧊ࠥ ḡᙹ, Si۵ྜྷญᱢᕽ✚ᖒŝݡᔢᨕ᳦᮹ᖁ⪙ࠥ᪡᮹ᩑĥᖒᮥᱶప ᱢᮝಽ⢽⩥⦽äᮥ᮹ၙ⦽݅. bྜྷญᱢᕽ✚ᖒᨱݡ⦽ᕽ
ᱢ⧊ࠥḡᙹ᮹sᯕ1ᨱaʭᬙᙹಾݡᔢᨕ᳦ᯕᕽ⦹ʑᨱᱢ⧊⦽
⪹Ğᯕࡽ݅. ᨕඹ᮹ᕽᱢ⧊ࠥḡᙹ۵᳑ᔍᩢᩎᨱᕽ⇽⩥⦽
ᨕ᳦᮹}ℕᙹෝʑᵡᮝಽ᯲ᖒࡹ໑᳑ᔍᩢᩎԕ↽ݡ}ℕᙹෝ
1ಽ⦹Łᯕᨱݡ⦽ᔢݡᱢእᮉಽᱢ⧊ࠥḡᙹෝᔑᱶ⦽݅. ᕽ
ᱢ⧊ࠥḡᙹෝđᱶ⦹ʑ᭥⦽ʑᵡᮝಽ۵ᯕᇥჶ(Binary method),
݉ᯝᄡపłᖁჶ(Univariate curve method), ݅ᄡప᮲ݖ⠪໕ჶ (Multivariate response surface method)ᯕᯩ݅(USGS, 2001).
ᯕॅʑᵡᨱ᮹⧕ᔑᱶࡽᙹᝍᱢ⧊ࠥ(Sd),ᮁᗮᱢ⧊ࠥ(Sv), ⦹ᔢᰍ ഭ᮹᳦ඹၰⓍʑ(Sci)ಽᇡ░Siෝĥᔑ⦹໑Eq. (4)᪡zᯕ݅᧲⦽
Ŗᯕ ᱽࡹᨕ ᯩ݅.
i d v ci
S s s s= × × (4a)
[ ]
1/3i d v ci
S = s s s× × (4b)
[ ]
i Min d v ci
S = s s s× × (4c)
a b c
i d v ci
S s s s= × × (a b c+ + =1) (4d)
Eq. (4a)᮹Œᖩჶᮡbᯙᯱeᱢ⧊ࠥa↽ᔢᯙᔢ⪙᯲ᬊᮥ
᮹ၙ⦹໑↽ᱢᕽ۵༉ुᯙᯱa↽ᱢᯝভ᳕ᰍ⦽݅. Eq. (4b) ۵ʑ⦹⠪Ɂჶᮝಽᕽbᯙᯱeᱢ⧊ࠥෝᅕᱶ⦹۵⬉ŝෝaḡ໑, Eq. (4c)۵ᱢ⧊ࠥa↽ᦦᯙ᳑ÕᮥŁಅ⦹ᩍbᯙᯱᵲᱢ⧊ࠥa
↽ᗭᯙᯙᯱෝၹᩢ⦹۵ႊჶᯕ݅. əญŁEq. (4d)۵aᵲ⊹ჶᮝ ಽ bᯙᯱᨱ ݡ⦽ ᵲࠥෝᇥᕾ⦹ᩍ ᱢ⧊ࠥ ḡᙹᨱaᵲ⊹ෝ
ᇡᩍ⦹۵ႊჶᯕ݅. River2Dᨱᕽ۵ᕽᱢ⧊ࠥḡᙹĥᔑႊჶ ᮝಽŒᖩჶ, ʑ⦹⠪Ɂჶ, ↽ᗭ⊹ჶᵲ⦹ӹෝᖁ┾⦹ᩍĥᔑ⧁
ᙹᯩᮝ໑ᅙᩑǍᨱᕽ۵ʑ᳕ᩑǍᨱᕽฯᯕᔍᬊࡹŁᯩ۵Œᖩჶ
ᮥ ᱢᬊ⦹ᩡ݅.
3. ༉⩶᮹ๅ}ᄡᙹᅕᱶ
3.1 ࡦଭઽલࢫছਐళୡܑ
ᔾ┽ᮁపᮥᔑᱶ⦹ʑ᭥⦽ݡᔢᩢᩎᮡӺ࠺v-ɩ⪙v⧊ඹᇡ ᯕ݅. ɩ⪙vᮡ Ӻ࠺v᮹ ᱽ 1ḡඹಽᕽ ⅾ ʙᯕ 114.6 kmᯕŁ
ᮁᩎ໕ᱢᮡ2,088 km2ಽӺ࠺vᱥℕᮁᩎ໕ᱢ᮹9%ᨱݍ⦹۵
ᵝḡᵲ⦹ӹᯕ݅. ɩ⪙v᮹ᮁᩎ⩶ᔢᮡݡℕಽᙹḡᔢᯕ໑
ᔢඹᨱᕽԉᕽᮝಽ⩶ᖒࡹᨕᯩ݅. ⦹ᔢྜྷḩᮡᮁಽᩑᰆᯕᔢݚ
⯩ʕ⦹ᯕအಽᔢඹǍeᮡ⪙ၶ࠭, ᯱi, ǖᮡ༉௹ಽǍᖒࡹᨕ
ᯩŁᵲඹᇡ۵ᯱiၰ༉௹, ⦹ඹᇡ۵༉௹ၰᝅ✙ಽ⩶ᖒࡹᨕ
ᯩ݅(Ministry of construction and transportation, 1997). Ӻ࠺v- ɩ⪙v⧊ඹᇡ۵♕ᱢᇡᨱ᮹⦽ݡȽ༉ᔍᵝaၽݍ⦹Łᔾᩎ ᯕ᪶ᖒ⦹íၽݍࡹᨕᯩᨕᕽ⪮ᙹᗭ☖ᮥᱡ⧕⦹۵ྙᱽᱱᮥᦩŁ
ᯩ݅. ੱ⦽ ⦹᮹ ᮁప, ᮁᗮ, ᮁᔍప ॒᮹ ᄡ࠺ᨱ ᮹⧕ ⦹
ḡ⩶ᯕᄡ⪵⦹۵⩥ᔢᯕၽᔾ⦹۵॒⦹ᔾ┽ĥᨱᄡ⪵ෝᵝ۵
ᯙॅᯕฯʑভྙᨱᱢ⧊⦽ᔾ┽ᮁపᮥᔑᱶ⦹ᩍᯕෝ⦹⪹Ğ šญᨱ ⪽ᬊ⦹۵ äᯕ ⦥⦹݅.
༉᮹ݡᔢǍeᮡFig. 1ŝzᯕvᱶŁಚᅕa᭥⊹⦽Ӻ࠺v-ɩ
⪙v⧊ඹᇡᯕ݅. Ӻ࠺vᔢඹᨱ۵ᖒᵝᙹ᭥š⊂ᗭ, ⦹ඹᨱ۵⪵ᬱ ᙹ᭥š⊂ᗭaᯩŁɩ⪙v᮹ᔢඹᨱ۵ᖒᕽᙹ᭥š⊂ᗭa᭥⊹⧕
ᯩ݅. ༉᮹ᩢᩎ᮹ḡ⩶Ł۵Fig. 2᪡z݅. əญŁ⧊ඹᇡ⦹ඹǍe ᨱᕽ۵ᩍᬙŝᗭaၹᅖ⦹ᩍၽᔾ⦹Łᯩ݅. Ӻ࠺v-ɩ⪙v⧊ඹᇡ ᮹ᙹ᭥š⊂ᗭಽᇡ░᳑ᔍࡽᮁ⫊ŝᙹ᭥☖ĥᯱഭ۵Table 1ŝ
z݅.
Ӻ࠺v-ɩ⪙v⧊ඹᇡᨱᕽᔾ┽ᮁపᮥᔑᱶ⦹ʑ᭥⧕ᕽ۵ᯕ
ḡᩎ᮹ᵝᨕ᳦᮹ᖁᱶŝᕽᱢ⧊ࠥḡᙹ᮹ᔑᱶᯕᵲ⦹݅.
Fig. 2. Bed elevation of the Nakdong River and Geumho River confluence
Table 1. Flow regime and water elevation of the Nakdong and Geumho Rivers (Ministry of land, transport and mari- time affairs, 2010)
Flow regime
Seongju gauging station
Q (m3/s)
Seongseo gauging station
Q (m3/s)
Hwawon gauging station
h (El. m)
Drought flow 33.3 3.60 9.31
Low flow 53.61 11.33 10.57
Median flow 92.38 15.59 10.89
High flow 145.45 26.27 11.11
Table 2. Comparison results of measured water level and HEC-RAS simulation results
Gauging station Measured water level h (El. m)
HEC-RAS simulation results h (El. m)
Error (m)
Waegwan 17.58 17.69 0.11
Seongju 14.72 14.77 0.05
Hwawon 10.06 10.02 0.04
Ӻ࠺vᨱ۵ʕ༑}, ქॅ⊹, iĉܩ, ⦝ၙ॒9᳦᮹ᨕඹaᵝ᳦ᮥ
ᯕŁᯩ݅ŁಅᲙᯩ݅. Sung ॒(2005)ᮡ2003֥ᇡ░2004֥
ʭḡᩢv, ᭥, ℎ॒ࠥӺ࠺v᮹ḡᨱᕽᵝᕽᨕ᳦ᮥ
᳑ᔍ⧩Łᯕॅᵲ⦝ၙ᪡iĉܩෝݡ⢽ᨕ᳦ᮝಽᖁᱶ⦹ᩡ݅.
⦝ၙ᪡iĉܩ۵ĥඹᖒ ᩍᬙŝᮁᙹᩎᨱᕽ⦹໑iĉܩa
⦝ၙᨱእ⧕2 cm aపⓑᨕ᳦ᮝಽ᳑ᔍࡹᨩ݅. WUA᮹
ĥᔑᨱᔍᬊࡹ۵⦝ၙ᪡iĉܩ᮹ᕽᱢ⧊ࠥḡᙹ۵Sung
॒(2005)᮹ᩑǍđŝෝᯕᬊ⧩݅. ᖒᨕʑ⦝ၙ᮹ᕽa܆↽
ᱢᮁᗮᮡ0.25 ~ 0.55 m/s, ᔑʑ۵0.30 ~ 0.55 m/sᯕ݅. əญŁ
1.2 m ᯕ⦹᮹ ᙹᝍᨱᕽ ᕽa܆⦹໑ ᖒᨕʑ ⦝ၙ᮹ ᕽᨱ
⦥⦽↽ᱢᙹᝍᮡ0.25 ~ 0.55 m, ᔑʑᨱ۵0.3 ~ 0.55 m᮹
ᙹᝍᯕᱢ⧊⦹݅. iĉܩ᮹Ğᬑ, ᕽ᳑Õᯕ⦝ၙ᪡ᮁᔍ⦹໑
ᖒᨕʑᨱ۵0.35 ~ 0.7 m/s᮹ᮁᗮᨱᕽ↽ᱢᕽᱢ⧊ࠥෝᅕᯕ
໑ᔑʑᨱ۵0.3 ~ 0.55 m/s᮹ᮁᗮᯕaᰆᱢ⧊⦹݅. əญŁ
ᖒᨕʑiĉܩ۵0.36 ~ 0.55 mᙹᝍ᮹⦹ᨱᕽᵝಽᕽ⦹໑
ᔑʑᨱ۵0.3 ~ 0.55 m᮹ᙹᝍᯕᕽᨱaᰆᱢ⧊⦽äᮝಽ
᳑ᔍࡹᨩ݅.
3.2 River2D ࡦ෴ଭ࠻Թ࣡࣪୨
ᝁᖒᯩ۵ᙹ⊹༉᮹đŝෝʑ᭥⧕ᕽ۵River2D᮹ๅ}ᄡ ᙹၝqࠥᇥᕾŝ⧉̹ๅ}ᄡᙹ᮹ᅕᱶᯕ⦥⦹݅. River2D᮹
ᵝ ๅ}ᄡᙹ۵ ᮁ⬉᳑Ł(ks)᪡ ࠺ᱱᖒĥᙹ(ν )ᯕ݅. kt s۵ Eq.
(5)ᨱ ᮹⧕ Manning᮹ ᳑ࠥĥᙹಽ ⢽⩥⧁ ᙹ ᯩ݅.
1/6
12 exp 2.5
s
k H
H n g
= ⎛ ⎞
⎜ ⎟
⎜ ⎟
⎝ ⎠
(5)
ᩍʑᕽnᮡManning᮹᳑ࠥĥᙹᯕ݅. ᕽᅙᩑǍᨱᕽ۵
Manning᮹᳑ࠥĥᙹෝᄡ⪵┅໑ᮁ⬉᳑Ł᮹ᄡ⪵ᨱෙᮁᗮ
ၰᙹᝍ༉᮹đŝෝᇥᕾ⦹ᩡ݅. əญŁEq. (6)᮹࠺ᱱᖒĥᙹෝ
ᄡ⪵┅໑ ↽ᱢsᮥ đᱶ⧩݅.
2
2 2
1 2 k k 3 2 k i j
t
s k j i
u
H u u u u
v H
C x x x
ε ε ε ∂ ⎛∂ ∂ ⎞
= + + ∂ +⎜⎜⎝∂ +∂ ⎟⎟⎠
(i, j, k = 1, 2) (6)
ᩍʑᕽε1,ε2,ε3۵ๅ}ᄡᙹᯕ݅. ᯱᩑ⦹ᨱᕽ۵Eq. (6)᮹
ࢱჩṙ⧎ᯕᙹ⊹༉᮹đŝᨱᵲ⦽ᩢ⨆ᮥၙ⊹ʑভྙᨱε2ෝ
ᄡ⪵┅໑ ๅ}ᄡᙹෝ ᅕᱶ⧩݅.
River2D᮹ ๅ}ᄡᙹ ᅕᱶᮥ ᭥⧕ ༉᮹Ǎeᮥ ⡍⧉⦹۵ ᪽ š, ᖒᵝ, ⪵ᬱᙹ᭥⢽ᨱᕽHEC-RAS᮹ᙹ᭥༉᮹đŝෝáᱶ⦽
⬥, Fig. 1᮹⊂ᖁNo.361 ~ No.365ᨱᕽHEC-RAS᪡River2D᮹
↽ݡᙹᝍŝ ݉໕⠪Ɂᮁᗮᮥ እƱ⧩݅. River2D᪡ HEC-RAS ۵ Ӻ࠺vᙹĥ ⦹ʑᅙĥ⫮(Ministry of land, transport and maritime affairs, 2009)ᨱෙӺ࠺vḡ⩶ᮥᯕᬊ⧩ŁӺ࠺v᮹
ᮁపᯕ41.2 m3/sᯙiᙹʑ᳑Õᨱᕽᙹ⊹༉᮹ෝᙹ⧪⧩݅. iᙹʑ
Fig. 3. Comparison results of HEC-RAS and River2D simulation results with changing parameters
(a) Velocity vectors and contour
(b) Contour of depth
Fig. 4. Simulation results of velocity and water depth in drought
ᮁపᯕ ၽᔾ⦽2009֥ 2ᬵ 20ᯝ᮹ ᙹ᭥š⊂đŝ᪡ HEC-RAS
༉᮹đŝෝTable 2ᨱእƱ⧩݅. HEC-RAS᮹᳑ࠥĥᙹෝǍe ᄥಽᄡ⪵⍽ᙹ᭥ෝ༉᮹⦽đŝ, ᪅₉a᧞0.1 m ᯕ⦹ಽӹ┡
ӹiᙹʑᙹ᭥ᄡ⪵ෝÑ᮹ᱶ⪶⯩༉᮹⦹Łᯩᨩ݅. áᱶࡽHEC- RAS༉᮹đŝෝ⊂ᖁNo.361 ~ No.365ᨱᕽRiver2D ༉᮹đŝ᪡
እƱ⧩݅. Fig. 3ᮡ ๅ}ᄡᙹ᮹ ᄡ⪵ᨱ ෙ River2D᪡ HEC- RAS ᮁᗮ, ᙹᝍ༉᮹đŝ᮹RMSE(Root Mean Square Error)
ෝࠥ⦽ə௹⥥ᯕ݅. əđŝn = 0.021,ε2= 0.25ᯝভᮁᗮ᮹
RMSEa0.04 m/s, ᙹᝍ᮹RMSEa0.26 mಽRMSE᮹⧊ᯕ
aᰆԏíӹ┡ԍ݅. ᕽᅙᩑǍᨱᕽ۵Ӻ࠺v-ɩ⪙v⧊ඹᇡ ᨱݡ⦽River2D ༉⩶᮹ๅ}ᄡᙹsᮝಽn = 0.021(ks= 0.027 m)
᪡ε = 0.25ෝ ᯦ಆ⦹ᩍ ݡᔢᩢᩎ᮹ ᔾ┽ᮁపᮥ ᔑᱶ⦹ᩡ݅.2
4. Ӻ࠺v-ɩ⪙v⧊ඹᇡ᮹ᕽ༉᮹
4.1 4۩Գॷડଲୢଭକ߆ॺ୨
ๅ}ᄡᙹ᮹ᅕᱶᮥ☖⧕đᱶ⦽ε2᪡nsᮥᯕᬊ⦹ᩍӺ࠺v- ɩ⪙v ⧊ඹᇡᨱ ݡ⦽ ᔾ┽ᮁపᮥ ᔑᱶ⧩݅. Fig. 4۵ Table 1 ᮹iᙹʑᙹ᭥, ᮁపĞĥ᳑Õᮥᯕᬊ⧕⮱༉᮹ෝᙹ⧪⦽đŝᯕ
݅. ᵡᖅᯕᱥᨱӺ࠺vᅙඹᨱ۵≉ᙹᅕa᭥⊹⧕ᯩŁiᙹʑ༉᮹
᳑Õ⦹ᨱᕽ۵ྜྷ᮹⮱ᯕ≉ᙹᅕෝᬵඹ⦹ḡ༜⦹ᩍᬑᦩᮝಽ
ෙ⮱ᯕၽᔾ⦹Łᯩ݅. ᯕಽᯙ⧕≉ᙹᅕ᮹⦹ඹ᳭ᦩᨱᕽ۵
ᔍᙹᩎ(recirculation zone)ᯕ ⩶ᖒࡹŁ ᯩ݅.
ᮁᗮၰᙹᝍ༉᮹đŝෝၵ┶ᮝಽӺ࠺v᮹ᵝᨕ᳦ᯙ⦝
ၙ᪡iĉܩ᮹aᵲaᬊ໕ᱢᮥ༉᮹⧩݅. ⦝ၙ᪡iĉܩ۵ᔾᰆ
݉ĥᨱᖒᨕʑ᪡ᔑʑಽӹ٭ᙹᯩᮝ໑݉ĥᨱᕽ
ᱢ⧊ࠥaᄡ⪵⦹ʑভྙᨱࢱʑಽӹ٥ᨕaᵲaᬊ໕ᱢᮥĥᔑ
⧩Łəđŝ۵Fig. 5, 6ŝz݅. ༉᮹Ǎeᨱᕽ⮱ᩢᩎ᮹໕ᱢᮡ
᧞2,039,873 m2ᯕ໑ᯕᵲᖒᨕʑ⦝ၙaᕽa܆⦽໕ᱢᮡ
(a) Adult stage (WUA = 63,643 m2)
(b) Spawning stage (WUA = 44,529 m2)
Fig. 5. WUA calculation results of Zacco platypus in drought flow before dredging
(a) Adult stage (WUA = 49,728 m2)
(b) Spawning stage (WUA = 44,293 m2)
Fig. 6. WUA calculation results of Zacco temmincki in drought flow before dredging
63,643 m2(ᱥℕ໕ᱢݡእ3.12%) ᔑʑ⦝ၙaᕽa܆⦽
໕ᱢᮡ44,529 m2(ᱥℕ໕ᱢݡእ2.18%)ᯕ݅. ༉᮹đŝಽᇡ░
⦝ၙ۵ᮁᗮᯕŁᙹᝍᯕԏᮡ≉ᙹᅕᵝᄡŝɩ⪙v⧊ඹ ᱱᇡɝᨱᕽᵝಽᕽa܆⦽äᮝಽӹ┡ԍ݅. əญŁiĉܩ᮹
aᵲaᬊ໕ᱢĥᔑđŝᖒᨕʑiĉܩ۵49,728 m2, ᔑʑiĉܩ ۵44,529 m2ಽĥᔑࡹᨩ݅. iĉܩ᮹Ğᬑᨱࠥᮁᗮᯕ᷾a⦹
Ł ᙹᝍᯕqᗭ⦹۵ ḡᩎᨱᕽ ᵝಽᕽ a܆⦹໑ ≉ᙹᅕᵝᄡ ŝɩ⪙vŝ᮹⧊ඹᱱ ᇡɝᨱᕽaᵲaᬊ໕ᱢᯕ׳íĥᔑࡹᨩ
݅. əญŁᔾᰆ݉ĥᄥಽᅝভ⦝ၙ᪡iĉܩ༉ࢱᔑʑᅕ
݅ᖒᨕʑᨱᕽմᮡᕽa܆໕ᱢᮥw۵äᮝಽĥᔑࡹᨩ݅.
aᵲaᬊ໕ᱢĥᔑđŝᨱɝÑ⦹ᩍᔾ┽ᮁపᮥđᱶ⦹ʑ᭥⧕
Ӻ࠺v, ɩ⪙v᮹ᮁపŝ⦹ඹ݉ᙹ᭥Ğĥ᳑Õᮥ᷾q┅໑⦝
ၙ᪡iĉܩ᮹aᵲaᬊ໕ᱢᮥ༉᮹⧩݅. Ӻ࠺vŝɩ⪙v᮹ᮁప ᄡ⪵ᨱෙ⦹ඹĞĥ݉᮹ᙹ᭥ᄡ⪵ෝĥᔑ⦹ʑ᭥⧕Eq. (7)ŝ
zᯕ ⪵ᬱ ᙹ᭥š⊂ᗭ᮹ ᙹ᭥-ᮁపłᖁᮥ ᯕᬊ⧩݅.
( )5.6863
0.0034 6.2286
Q= h+ (7)
Ӻ࠺v᮹ᮁపᮥ27.25 m3/s ~ 74.93 m3/s, ɩ⪙v᮹ᮁపᮥ
2.95 m3/s ~ 8.10 m3/sಽᄡ⪵┅໑⦝ၙ᪡iĉܩ᮹aᵲaᬊ ໕ᱢᮥ༉᮹⧩݅. Fig. 7ᮡᮁపᄡ⪵ᨱෙ⦝ၙ᪡iĉܩ᮹
Fig. 7. WUA of Zacco platypus and Zacco temmincki with flowrate change before dredging
Table 3. WUA calculation results of Zacco platypus and Zacco temmincki before dredging
Fish Nakdong River Q (m3/s)
Geumho River Q (m3/s)
WUA (m2) WUA/A
Adult Spawning Adult Spawning
Zacco Platypus
27.25 2.95 62,959 42,505 0.0309 0.0211
29.97 3.24 63,072 43,486 0.0310 0.0214
33.30 3.60 63,643 44,529 0.0312 0.0218
36.63 3.96 64,151 46,088 0.0312 0.0224
39.96 4.32 64,258 46,656 0.0311 0.0226
47.95 5.18 63,729 46,902 0.0307 0.0226
57.54 6.22 61,312 45,454 0.0290 0.0215
74.93 8.10 55,830 42,144 0.0258 0.0195
Zacco temmincki
27.25 2.95 49,041 42,448 0.0241 0.0210
29.97 3.24 49,339 43,153 0.0242 0.0212
33.30 3.60 49,728 44,293 0.0244 0.0217
36.63 3.96 50,516 45,618 0.0246 0.0222
39.96 4.32 50,670 46,421 0.0245 0.0225
47.95 5.18 50,488 44,091 0.0243 0.0212
57.54 6.22 49,045 40,631 0.0232 0.0192
ᱥℕ໕ᱢݡእaᵲaᬊ໕ᱢእ᮹ᄡ⪵ෝࠥ⦽đŝᯕ݅. ᮁపᄡ
⪵ᨱ᮹⧕⮱ᩢᩎ᮹໕ᱢᯕᄡ⪵⦹ʑভྙᨱaᵲaᬊ໕ᱢ༉᮹
đŝෝ ྜྷ᮹⮱ᯕၽᔾ⦽ᱥℕ⦹ࠥ໕ᱢ(A)ᮝಽӹ٥ᨕⅾ໕ᱢᨱ
ݡ⦽ aᵲaᬊ໕ᱢ᮹ እᮉᮥ ə௹⥥᮹ y⇶ᨱ, Ӻ࠺v᮹ ᮁపᮥ
ə௹⥥᮹x⇶ᨱӹ┡ԩ݅. əđŝᖒᨕʑ⦝ၙ᮹ĞᬑWUA/A ᮹ ↽ݡsᯕ ᔑʑᅕ݅ ׳í ӹ┡ԍᮝ໑, Ӻ࠺v᮹ ᮁపᯕ
33.3 m3/s, ɩ⪙v᮹ᮁపᯕ3.60 m3/sᯙĞᬑWUA/A᮹↽ݡsᯕ
ӹ┡ԍᮝ໑əsᮡ0.0312ಽĥᔑࡱ݅. ᔑʑ⦝ၙ᮹Ğᬑᨱ ۵ Ӻ࠺v᮹ ᮁపᯕ 40.0 m3/s, ɩ⪙v᮹ ᮁపᯕ 4.32 m3/sᯝ
ভWUA/A᮹↽ݡsᯕ0.0226ᮝಽӹ┡ԍ݅. iĉܩࠥ⦝ၙ
᪡zᯕᖒᨕʑ᮹WUA/Aa׳íӹ┡ԍᮝ໑ᖒᨕʑᨱ۵Ӻ
࠺v᮹ᮁపᯕ36.6 m3/s, ɩ⪙v᮹ᮁపᯕ3.96 m3/sᯝভWUA/A ᮹↽ݡsᯕ0.0246ᮝಽĥᔑࡱ݅. əญŁᔑʑiĉܩ᮹↽ݡ
WUA/A۵Ӻ࠺vᮁపᯕ40.0 m3/s, ɩ⪙v᮹ᮁపᯕ4.32 m3/sᯝ
ভ 0.0225ಽ ĥᔑࡱ݅.
Table 3ᮡə௹⥥᮹đŝෝᱶญ⦽⢽ᯕ݅. ᮁప᷾aᨱ
ⅾ⮱໕ᱢᮡ᷾a⦹໑⦝ၙ᪡iĉܩ᮹ aᵲaᬊ໕ᱢᮡᯝ ᱶᮁపʭḡ᷾a⦹݅a݅qᗭ⦹۵đŝෝᅕᩍᵡ݅. əญŁ
ᔾᰆ݉ĥᄥಽ↽ݡWUA/Aaӹ┡ӹ۵ᮁపᯕᄡ⪵⦹ʑভྙᨱ
b݉ĥᄥಽ݅ෙᔾ┽ᮁపᮥᔑᱶ⧁⦥aᯩ݅. ᕽᖒᨕʑ
⦝ၙ᮹ᔾ┽ᮁపᮡӺ࠺vᮁప33.3 m3/s, ɩ⪙vᮁప3.60 m3/s ᮝಽ, ᔑʑᨱ۵Ӻ࠺vᮁప40.0 m3/s,ɩ⪙vᮁప4.32 m3/sᮝಽ
đᱶ⧁ᙹᯩ݅. əญŁiĉܩ᮹ᔾ┽ᮁపᮡᖒᨕʑ᮹Ğᬑᨱ۵
Ӻ࠺vᮁప36.6 m3/s, ɩ⪙vᮁప3.96 m3/sᮝಽ, ᔑʑ۵Ӻ࠺v
ᮁప 40.0 m3/s, ɩ⪙vᮁప 4.32 m3/sᮝಽ đᱶ⧁ ᙹ ᯩ݅.
(a) Velocity vectors and contour
(b) Contour of water depth
Fig. 8. Simulation results of velocity and water depth after dredging
Table 4. WUA calculation results of adult stage fish in Nakdong River after dredging
Fish Nakdong River Q (m3/s)
Geumho River Q (m3/s)
WUA
(m2) WUA/A Zacco
platypus
33.30 3.60 9,968 0.00357
36.63 3.96 10,029 0.00359 39.96 4.32 10,095 0.00361
Zacco temmincki
33.30 3.60 7,671 0.00275
36.63 3.96 7,682 0.00275
39.96 4.32 7,694 0.00275
Pseudogobio esocinus
33.30 3.60 5,774 0.00207
36.63 3.96 6,299 0.00225
39.96 4.32 6,877 0.00246
Pungtungia herzi
33.30 3.60 2,734 0.00098
36.63 3.96 2,986 0.00107
39.96 4.32 3,264 0.00117
Common carp
33.30 3.60 22,263 0.00797 36.63 3.96 22,307 0.00798 39.96 4.32 22,372 0.00801
4.2 ஜডଲบًܛԳ-ׁԳࠑऀଭઘࠑঃ࣡ฃ 4ݡvᔕญʑᔍᨦᯕ⬥⦹ᔢᵡᖅŝa࠺ᅕᖅ⊹ᨱӺ࠺v
ᅙඹᨱᕽɪĊ⦽ᙹญ⦺ᱢᄡ⪵aၽᔾࡹŁᯩ݅. ༉᮹ݡᔢǍeᯙ
Ӻ࠺v-ɩ⪙v⧊ඹḡᱱ᮹ᔢඹᨱ۵vᱶŁಚᅕaÕᖅࡹᨩŁ⦹
ඹᨱ۵ݍᖒᅕaÕᖅࡹᨕᬕᩢࡹŁᯩ݅. ⠪ᨱvᱶŁಚᅕ⦹ඹ ᇡ░ ݍᖒᅕ Ǎeᮡ ᯝᱶ⦽ šญᙹ᭥ಽ ᮁḡࢉᨱ ᙹᝍᮡ
6 m ᯕᔢᮝಽ, ᙹ᭥۵14 El. mಽᮁḡࡹᨕᵡᖅᱥᅕ݅ᙹᝍᯕ
᷾a⦹Łᮁᗮᮡqᗭࡹᨩ݅. ᯕ్⦽ᔢ⫊ᨱᕽӺ࠺vᅙඹᨱᕽ
ᙹᝍᯕԏŁෙᮁᗮᨱᕽᕽ⦹۵⦝ၙ, iĉܩ᪡zᮡᨕඹ᮹
ᕽ۵qᗭ⧁äᯕᩩᔢࡽ݅. ᕽᅙᩑǍᨱᕽ۵River2D
ෝᯕᬊ⦹ᩍᵡᖅᱥ, ⬥᮹ᮁᗮ, ᙹᝍ༉᮹đŝෝእƱ⦹Łᵡᖅ
ᱥḡ⩶ᨱᕽđᱶ⦽ᔾ┽ᮁప᳑Õᨱᕽ⦝ၙ᪡iĉܩ᮹ᵡᖅ
ᱥ, ⬥aᵲaᬊ໕ᱢ᮹ᄡ⪵ෝ⠪a⦹ᩡ݅. əญŁӺ࠺vᕽ
ᨕ᳦ ᵲ ᮁᗮᯕ ԏᮡ Ŕᨱᕽ ᵝಽ ᕽ⦹۵ ༉௹ྕḡ, ࠭Łʑ,
ᯪᨕ᮹aᵲaᬊ໕ᱢᮥĥᔑ⦹ᩍᵡᖅᯕ⬥ ⦝ၙ᪡iĉܩ᮹
aᵲaᬊ໕ᱢŝ እƱ⦹ᩍ ᵡᖅ᮹ ᩢ⨆ᮥ ᇥᕾ⦹ᩡ݅.
Fig. 8ᮡ Ӻ࠺v ᅙඹ᮹ ᵡᖅ ᯕ⬥, Ӻ࠺v ᮁప 33.3 m3/s, ɩ⪙vᮁపᯕ3.60 m3/sᯙiᙹʑᮁప᳑Õᨱᕽ⦹ඹᙹ᭥a14 El. mᯙĞᬑᮁᗮŝᙹᝍᮥ༉᮹⦽đŝᯕ݅. vᱶŁಚᅕ᮹a࠺ᅕ a༉ࢱ}ႊࡱᮥĞᬑ, a࠺ᅕ⦹ඹᨱᕽᔍᙹᩎᯕၽᔾ⦹Łᅙඹ᮹
ᮁᗮᯕᵡᖅᱥŝእƱ⦹ᩍ1/2 ᯕ⦹ಽqᗭࡹᨩ݅. vᱶŁಚᅕ
⦹ඹ0.5 km᪡1.0 km ⦹ඹᨱᕽᵡᖅᱥ, ⬥᮹ᙹᝍŝᮁᗮ༉᮹đ ŝෝእƱ⦽đŝ, ᵡᖅᯕ⬥ᨱᙹᝍᯕ6.0 m ᱶࠥಽᔢ, ⦹ඹᨱ
Łíᇥ⡍⦹Łᯩᮝ໑ᵡᖅᱥŝእƱ⦹ᩍᙹᝍᯕ2 ~ 3႑᷾a⧩
݅. ၹ໕⦹⡎ႊ⨆ᮥၽᔾࡹ۵↽ݡᮁᗮᮡ0.03 m/s ~ 0.04 m/sᯕ໑ᵡᖅᱥᨱእ⧕1/4 ~ 1/2 ᱶࠥಽqᗭ⧩݅. ᕽᵡᖅ
ᯕ⬥ᨱ۵ᙹᝍᯕʫŁᮁᗮᯕ۱ฑŔᨱᕽᕽ⧁ᙹᯩ۵ᨕඹa
Ӻ࠺v ᅙඹ᮹ ᬑᱱ᳦ᯕ ࢁ äᯕ ᩩᔢࡽ݅.
Ӻ࠺vᨱᕽ⦹໑᪥อ⦽ᮁᗮᨱᕽၽčࡹ۵༉௹ྕḡ(Pse- udogobio esocinus), ࠭Łʑ(Pungtungia herzi), ᯪᨕ(Common carp)᮹ᕽᱢ⧊ࠥḡᙹ۵Kang ॒(2011), Conklin ॒(1996) ᮹ᩑǍđŝෝᯕᬊ⧩݅. ⦝ၙ, iĉܩ᮹ᮁᗮ, ᙹᝍᱢ⧊ࠥ᪡
እƱ⦹ᩍ༉௹ྕḡ, ࠭Łʑ, ᯪᨕ۵ԏᮡᮁᗮŝʫᮡᙹᝍᨱᱢ⧊
⦽äᮝಽ᳑ᔍࡹᨩ݅. ᵡᖅᱥḡ⩶ᨱᕽđᱶ⦽Ӻ࠺v᮹ᔾ┽ᮁ
Fig. 9. Comparison of WUA/Abeforedredgingandafterdredging
ప 33.3 m3/s ~ 40.0 m3/s ŝ ɩ⪙v᮹ ᔾ┽ᮁప 3.96 m3/s ~ 4.32 m3/sᮥᔢඹ݉Ğĥ᳑Õᮝಽ⦹ᩍ⦝ၙ, iĉܩ, ༉௹ྕḡ,
࠭Łʑ, əญŁᯪᨕ᮹ aᵲaᬊ໕ᱢᮥĥᔑ⦽đŝTable 4᪡
z݅. ᵡᖅ⬥ᨱ۵Ӻ࠺v᮹ᬑᱱ᳦ᯕᨩ⦝ၙ᪡iĉܩ᮹a ᵲaᬊ໕ᱢᯕᵡᖅᱥᨱእ⧕Ⓧíqᗭ⧩݅. əญŁᮁᗮᯕ᪥อ
⦽Ŕᨱᕽᕽa܆⦹ḡอ⦝ၙ, iĉܩ᪡zᯕⓍʑa᯲ᮡ
༉௹ྕḡ᪡࠭Łʑ᮹Ğᬑaᵲaᬊ໕ᱢᯕԏíĥᔑࡱ݅. ᯕᨱ
እ⧕እƱᱢⓍʑaⓍŁⓑvŝ⪙ᙹᨱᕽᵝಽᕽ⦹۵ᯪᨕ᮹
Ğᬑ, aᵲaᬊ໕ᱢᯕ⦝ၙ, iĉܩᅕ݅2 ~ 3 ႑ⓑäᮝಽ
ӹ┡ԍ݅. Fig. 9۵ᮁపᄥಽ⦝ၙ᪡iĉܩ᮹WUA/AෝእƱ
⦽ə௹⥥ᯕ݅. əđŝ, ⦝ၙ᪡iĉܩ༉ࢱᵡᖅᯕ⬥ᨱ݉᭥
໕ᱢݚaᵲaᬊ໕ᱢ᮹እᮉᯕ᧞1/9ಽqᗭ⧩݅. ᕽᵡᖅ
ᯕ⬥ᨱ۵ ᙹᝍᯕʫŁ ᮁᗮᯕ ԏᮡŔᨱ ᵝಽ ᕽ⦹۵ᯪᨕ᪡
zᮡᨕ᳦ᮝಽӺ࠺vᅙඹ᮹ᬑᱱ᳦ᯕᄡ⪵⧁äᯕᩩᔢࡽ݅.
5. đು
Ӻ࠺v-ɩ⪙v ⧊ඹᇡ᮹ ᔾ┽ᮁపᮥ ᔑᱶ⦹ʑ ᭥⧕ IFIMᨱ
ᮁపᮥᄡ⪵┅໑aᵲaᬊ໕ᱢᮥĥᔑ⧩݅. ḡඹ᮹⧊ඹ᪡
ᙹŖǍ᳑ྜྷᮥ⡍⧉⦹۵ḡ⩶ᨱᕽᔾ┽ᮁపᮥᔑᱶ⦹Łᕽ᮹
Ŗeᱢᇥ⡍ෝᦥᅕʑ᭥⧕2₉ᬱᙹ⊹༉⩶River2Dෝᯕᬊ⧩݅.
ຝᱡRiver2Dෝᯕᬊ⦽ᙹ⊹༉᮹đŝ᮹┡ݚᖒᮥá᷾⦹ʑ᭥⧕
ᙹ᭥š⊂đŝෝ ☖⧕ á᷾ࡽ HEC-RAS ༉᮹đŝෝ River2D ᮹ᮁᗮ, ᙹᝍ༉᮹đŝ᪡እƱ⦹ᩍ࠺ᱱᖒĥᙹ᪡ᮁ⬉᳑Łෝᅕ ᱶ⧩݅. əđŝ, ks= 0.027 m,ε2= 0.1ᯝভRiver2D᮹ᮁᗮŝ
ᙹᝍ༉᮹ đŝᨱᕽ aᰆ ᯲ᮡ ᪅₉a ၽᔾ⧩݅.
đᱶࡽๅ}ᄡᙹෝᯕᬊ⦹ᩍᵡᖅᱥӺ࠺v-ɩ⪙v⧊ඹᇡᨱ
ݡ⦽ᔾ┽ᮁపᮥᔑᱶ⧩݅. ᮁపᄡ⪵ᨱⅾ⮱໕ᱢᯕᄡ⪵
⦹ʑভྙᨱ⮱໕ᱢݡእaᵲaᬊ໕ᱢ᮹እᮉᮥᯕᬊ⧕ᕽ
໕ᱢᮥእƱ⧩݅. əđŝ, ⦝ၙ᪡iĉܩ᮹ᔾ┽ᮁపᮡӺ࠺v
ᮁప33.3 m3/s ~ 40.0 m3/s,ɩ⪙vᮁప3.6 m3/s ~ 4.32 m3/sಽ
đᱶ⧁ ᙹ ᯩᨩ݅. 4ݡv ᔍᨦ ᯕ⬥ Ӻ࠺v ᅙඹᨱ ⦹ᔢᵡᖅŝ
a࠺ᅕ᮹ᖅ⊹ᨱᙹᝍᯕʫᨕḡŁᮁᗮᯕԏᦥḡ۵ᙹญ⦺ᱢ
ᄡ⪵aၽᔾ⦹Łᯩ݅. ᕽӺ࠺v-ɩ⪙v⧊ඹᇡᨱᕽđᱶ⦽
ᔾ┽ᮁపᮥᯕᬊ⦹ᩍᮁᗮᯕԏᮡŔᨱᕽᕽ⦹۵ᨕඹᯙᯪᨕ॒
ŝ⦝ၙ, iĉܩ᮹aᵲaᬊ໕ᱢᮥĥᔑ⦹ᩍእƱ⧩݅. əđŝ
ᵡᖅᯕ⬥⦝ၙ, iĉܩ᮹aᵲaᬊ໕ᱢᯕ᧞1/9ಽqᗭ⧩Ł
ⓑvᨱᵝಽᕽ⦹۵ᯪᨕ᮹aᵲaᬊ໕ᱢᯕӺ࠺v᮹ᬑᱱ᳦ᮝ ಽಅḥ⦝ၙ, iĉܩᨱእ⧕2 ~ 3 ႑ⓑäᮝಽӹ┡ԍ݅.
ᯕ్⦽đŝᨱ ᮹Ñ⦹ᩍ ᵡᖅᯕ⬥ Ӻ࠺v ᅙඹᨱᕽ a܆⦽
ᨕ᳦ᯕ ᄡ⪵⧁ äᯕ ᩩᔢ⧁ ᙹ ᯩ݅.
qᔍ᮹ɡ
ᅙᩑǍ۵POSCO Õᖅ᮹ᩑǍእḡᬱ(⦹ᵡᖅᨱෙᙹญ
⦺ၰᔾ┽⦺ᱢᩢ⨆á☁)ŝǎ☁Ʊ☖ᇡྜྷšญᩑǍᔍᨦᩑǍእ ḡᬱ(11ʑᚁ⩢ᝁC06), ᕽᬙݡ⦺ƱŖ⦺ᩑǍᗭၰÕᖅ⪹Ğ᳦⧊
ᩑǍᗭ᮹ ḡᬱᮝಽ ᙹ⧪ࡹᨩܩ݅.
References
Bovee, K. D. (1986). Development and evaluation of habitat suitability criteria for use in the instream flow incremental methodology, Washington, DC: USDI Fish and Wildlife Service Instream Flow Information Paper No. 21. FWS/OBS-86/7.
Chou, W. C. and Chuang, M. D. (2011). “Habitat evaluation using suitability index and habitat type diversity : A Case Study Involving A Shallow Forest Stream in Central Taiwan.” Environmental Monitoring and Assessment, Vol. 172, pp. 689-704.
Conklin, D. J., Canton, S. P., Chadwick, J. W., and Miller, W. J.
(1996). “Habitat suitability curves for selected fish species in the Central Platte River, Nebraska.” Rivers, Vol. 5, No. 4, pp. 250-266.
Diego, G. J. and Javier, G. (2007). “Evaluation of instream habitat enhancement options using fish habitat simulation : Case-Studies in the River Pas (Spain).” Aquatic Ecology, Vol. 41, pp.461-474.
Hur, J. W. and Kim, J. (2009). “Assessment of riverine health con-
dition and estimation of optimal ecological flowrate considering fish habitat in downstream of Yongdam dam.” Journal of Korea water resources association, Vol. 42, No. 6, pp. 481-491 (in Korean).
Im, D., Kang, H., Kim, K. H. and Choi, S. U. (2011). “Changes of river morphology and physical fish habitat following weir removal.” Ecological Engineering, Vol. 37, pp. 883-892.
Kang, H., Im, D., Hur, J. W. and Kim, K. (2011). “Estimation of habitat suitability index of fish species in the Geum River water- shed.” Journal of Korea society of civil engineers, Vol. 31, No.
2B, pp. 193-203 (in Korean).
Kang, J. H., Lee, E. T., Lee, J. H., and Lee, D. H. (2004). “Estimation of river instream flow considering fish habitat conditions.” Journal of Korea Water Resources Association, Vol. 37, No. 11, pp. 915- 927 (in Korean).
Kim, K., Lee, J., Hong, I., and Woo, H. (1996). “Development of a method for determining the instream flow and its application: I.
Estimation method.” Journal of Korea Water Resources Associa- tion, Vol. 29, No. 4, pp. 161-176 (in Korean).
Lacey, R. W. J. and Millar, R. G. (2004). “Reach scale hydraulic assessment of instream salmonid habitat restoration.” Journal of the American Water Resources Association, Vol. 40, No. 6, pp.
1631-1644.
Lee, J. H., Jeong, S. M., Lee, M. H., and Lee, Y. S. (2006a).
“Estimation of instream flow for fish habitat using instream flow incremental methodology (IFIM) for major tributaries in Han River basin.” Journal of Korea society of civil engineers, Vol. 18, No. II-1, pp. 1-11 (in Korean).
Lee, J. H., Kil, J. T., and Jeong, S. (2010). “Evaluation of physical fish habitat quality enhancement designs in urban streams using a 2D hydrodynamic model.” Ecological Engineering, Vol. 36, pp.
1251-1259.
Lee, K. S., Chung, E., Shin, M., and Kim, Y. (2006b). “Determina- tion of instreamflow requirement for upstream urban watershed using SWAT model.” Journal of Korea Water Resources Asso- ciation, Vo. 39, No. 8, pp. 703-716 (in Korean).
Ministry of construction and transportation (1997). Basic plan for
river maintenance of Geumho River (in Korean).
Ministry of land, transport and maritime affairs (2009). Basic plan for river maintenance of Nakdong River (in Korean).
Ministry of land, transport and maritime affairs (2010). Hydrological annual report in Korea (in Korean).
Oh, K., Jeong, S., Lee, J., Choi, G., and Kim, D. (2008). “Estimation of optimum flow needed for fish habitat by application of one and Zacco platypus.” Journal of Korean Society of Hazard Mitigation, Vol. 8, No. 1, pp. 117-123 (in Korean).
Scruton, D. A., Clarke, K. D., Ollerhead, L. M. N., Perry, D., and Mckinley, R. S. (2002). “Use of telemetry in the development and application of biological criteria for habitat hydraulic modeling.”
Hydrobiologia, Vol. 483, pp.71-82.
Steffler, P. and Blackburn, J. (2002). “River 2D, two-dimensional depth averaged model of river hydrodynamics and fish habitat:
Introduction to Depth Averaged Modeling and User’s Manual,”
University of Alberta, Edmonton, Alberta, Canada.
Sung, Y. D., Park, B. J., Joo, G. J., and Jung, K. S. (2005). “The esti- mation of ecological flow recommendations for fish habitat.”
Journal of Korea Water Resources Association, Vol. 38, No. 7, pp. 545-554 (in Korean).
Midcontinent Ecological Science Center.
Woo, H., Lee, J. W., and Kim, K. H. (1998). “Development of a method for determination of instream flow needs required for fish habitat conservation.” Journal of Korea Society of Civil Engineers, Vol. 18, No. II-4, pp. 339-350 (in Korean).
Wu, R. S. and Mao, C. T. (2007). “The assessment of river ecology and habitat using a two-dimensional hydrodynamic and habitat model.” Journal of Marine Science and Technology, Vol. 15, No.
4, pp. 322-330.
Yi, Y., Wang, Z., and Yang, Z. (2010). “Two-dimensional habitat modeling of Chinese sturgeon spawning sites.” Ecological Mod- eling, Vol. 221, pp. 864-875.
