^^Ha '2"u^^di^ hnrng. Kv ihiidl cdng trinh. Van lai vd Cdng nghc Bu
TINH TOAN CAC THAM SO SONG TRONG BAO PHUC VU XAY DUNG CONG TRINH BIEN VEN BO
Nguyen Manh Iliing, Duong Cong Dien, Nguyen Vu Thiing Vien Co hpc. Vien Khoa hpc va Cong nghc Vict Nam.
264 Doi Can. Ba Dinh, 1 la Npi nmhungfa'imcch.ac.vn Tom tat:
Trong ndi dung bdo cdo, cdc tdc gia dd trinh bdy cdc kit qud tinh todn cdc tham sd -idng phuc vu xdy dung cdng irinh bien ven hd cho 3 khu vuc. lir Quang Ninh den Quang Nam. Tir Quang Nam din Vung Tdu vd tir Vung Tdu den Kien Giang. Cdc budc linh lodn bao gdnr 1 'Thung ke cdc con bdo dd bd vd dnh hudng true liep vdo khu vuc hd hien I 'iel Nam tir nhung ndm 50 cua thi ky trudc cho den nay. .\u dung phirrmg phdp .Monte Carlo de tgo bd sd lieu bdo md phdng. 2. Tinh lodn tnrdng sdng cue dai vdi cdc chu ky lap khdc nhau cho cdc viing nude sdu doc ddi ven bien sir dung cdc md hinh tinh .sdng hien dgi.
tao hd .so lieu trudng sdng vimg nude sdu vdi cdc chu ky lap khdc nhau cho cdc vimg bd bien dgc bd hien Viet Nam: 3 Tinh todn lan iruyHn sdng tir viing nude sdu vdo bd theo nid hinh lan truyen sdng 2D vd ID. 4 Tinh lodn tnrdng sdng vdi cdc elm ky lap khdc nhau cho cdc vimg vinh, cira sdng dugc che chdn khdng chiu anh huong cua truang sdng vimg mrdc sdu theo cdc yiu Id tau sdng. Cdc ket qud ndy dd dugc sir dung lam cdc tham sd ddu vdo de ihiil ki de hien cho 3 khu vuc neu tren vd phuc vu cho viec sogn thao hudng ddn: Thiel ke vd thi cdng de bidn do Bd NN&PTNTphdi hdnh.
COMPUTATION OF STORM WAVE PARAMETERS FOR COASTAL CONSTRUCTION DESIGNED
Abstract:
In this paper results of wave computations for the construction of marine structures in the coastal zone for 3 zones along coast line of Vietnam as: from Quang Ninh lo Quang Nam, from Quang Nam lo Vung Tau and from Vung Tau to Kien Giang are presented The paper consists of 3 parts as follows: 1. To establish of the dala set of historical storm affected to the coast zone of Vietnam from the year of fifteen of the last century and to simulate the storm data set hy Monte Carlo method; 2. To compute maximum depth sea wave parameters with different returning period for 3 zones using modern global wm'e model: 3 To compute wave propagation from deep sea boundary to the sea dyke foot by 2D and ID method; 4. To compute local wave parameters by wind speed, duration and fetch for the inland zones not affected hy the deep sea wave. The obtained results have been used for drawing up the Instruction for .sea dyke design, construction and building
•i iifihl Khoa hoc vd CdiK nghe Bien lodn ilinc,i±_ ""'X \
Mrt BAU
Mac dii trong nhCrng nam gin day he thdng dc bi6n. dac biet la dc bicn khu vyc chau lh6 song'llflng da duoc nanu cip va hoan thien nho cdc dir an trong nuoc va quoc te nluing qua sir kicn con bao s6 7 niim 2005 (DAMREY) gay vo dc tai 3 khu virc thuoc he thong dc j biin huyen I lai I lau. linh Nam Dinh cho thay vice nang cap he thong de bicn la het sue cap I thiet nhim tang cirong kha nang chSng choi voi thien tai, bao vc bo bien dac biet lit imng bii canh muc nitoc dang toan ciu do biin dii khi hau. Nam 2007 Chirong trinh nang cap de biin doc bo biin nuoc ta da duoc Bo Nong nghiep va Phat tricn Nong thon cho liicn khai nhim thirc hien nhiem vu nay. Chuong trinh dugc thuc hicn trong 3 giai doan «Vi 3 khu vuc: Tir Quang Ninh din Quang Nam; tir Quang Narn din Vung Tau va tit Vung lau din Kicn Giang. Nhom cac can bp nghien cuu vi song bicn ciia Vien Co hoc da tham gia trong Chuong trinh nay voi nhiem vu nghien ctru tinh loan cac tham so song voi cac chu ky lap khac nhau lam diu viio cho viec thiit ki vii thi cong dc bicn noi rieng va phuc vu xiiy dirng cong trinh biin \ en bo noi chung. Bao cao duge trinh bay trong 4 phiin: I. TliiJng , kc cac con bao di bo va anh hirgng true tiip vao khu vite bo bicn Vict Nam; 2. Tinh toan trircrng song cue dai viing nuoc sau voi cae chu ky lap khac nhau; 3. Tinh Iruycn song tir viing niroc siiu vao bcj; 4. Tinh song theo cac yiu ti tao song cho cac viing khong chiu anh huong ciia irudng song viing khoi
I. Thong kc biio
Vice thing kc cac con bao tir tnroc toi nay do bo vao khu virc nghien euu lii khong thi;
thiiu dugc di tir do co dirge cae tham so trirgng song phuc vu tinh toan thiet ke de bicn.
Thoi gian thing kc phai dii dai sao cho co the dira ra cac tham s6 che do ciia trucrng song cue dai trong bao cho cac vung bo bien khac nhau. Doi vgi khu virc bicn Dong co thi; thu thap cac s6 lieu bao tai cac trung tiim khi titgng thuy van the gioi va khu vuc nhu: My, Nhat. Phillipins. Trung Quoc, Dai Loan...Cae so lieu ve cae con bao do bp vao khu vuc nghiiin ciru eung eo the thu thap tir bp tu lieu bao ciia Trung tam Du bao Khi tugng Thiiy van Quoc gia. Noi chung thong ke ke lich sir cac con bao cua cac trung tam n6i tren tuong doi phii hgp voi nhau, cac so lieu ve cac con bao trong qua khir, dac biet la thgi ky truoc nhung nam 1980 khi chua phat trien manh phirgng tien quan trac vien tham deu dua vao cac trung tam nghien ciru co lich sir lau dgi nhu cua My hoac Nhat. Sau khi tham khiio so sanh cac so lieu thong ke eac con bao chiing tot da dua tren hai nguon so lieu chinh do la Nguon thong ke cac so lieu bao tir Trung tam tu lieu UNISYS (http://weather.unisys.com/hurrieane/) va So Khi tugng, Nhat JMA (http://ogora.ex.nii.ac.jp/digital-typhoon/index.html.en). Trong do cac s6 lieu bao tir cac nam truoc nam 1980 dugc thing ke tir nguin so lieu ciia Trung tam Tu lieu UNISYS. Cac so lieu bao trong nhimg nam gan day dugc thong ke tir nguon so lieu ciia So Khi tugng Nhat JMA.
Da lien hanh thong kc cae eon bao manh do bo hoac anh huong true tiip din khu vuc ven bo bien nugc ta cho 3 viing. Tong cong da thong ke duge khoang 190 con bao manh do bp hoac anh huong true licp din ca 3 khu vuc nghien cim tron^ Ihdi gian lir 1951 den 2007. Cac cgn bao thong ke dugc, dugc lap thanh eg sg dir lieu di phuc vu cac tinh loan trucmg ap va truong song trong bao. Trudng gio trong khu vuc tam bag la mpt trong cac
Tieu ban Ndng lugng. Ky thuat cdng trinh. Van lai vd Cdng nghe Bien
ylu td bet sue quan trpng d^ tinh toan trudng song trong bao. Do dp phan giai ciia trudng gio nen la kha thd {1,25 dp kinh vT) nen khdng the su dung cac so lieu nay de ndi suy ra trudng gio trong tam bao vi vdi ludi tho nhu vay se bd qua cac tdc dp gid cue dai tai lam bao. Chiing tdi da sir dung phuong phap tinh gid theo mo hinh phan tich gio trong tam bao cua G. J. Holland [1] d§ tinh gio chi tiet Irong tam bao vdi dien lich la mpt hinh Iron cd ban kinh la 6 dp tinh lir tam bao. Mo hinh phan tich nay da dupe chap nhan trong hudng d^nbao vebd[5].
2. Tinh toan trudng song cue dai vung nifdc sau vol cac chu ky lap khac nhau Cac budc tinh toan trudng song cue dai vung nude sau vdi cac chu ky lap khac nhau bao gdm xay dung ludi tinh sdng vung nude sau, hieu chinh va ki^m djnh mo hinh tinh song viing nude sau, xay dung ludi tinh lan truyen song tir vimg nude sau vao vung ven bd va tinh toan cac tham sd sdng vdi cac chu ky lap khac nhau cho cac ludi tinh lan truyen song.
2.1 Xay diptg lir&i tinh cho todn vdng bien Dong, thiet lap cdc tham s6 vat ly ciia mo hinh SWAN, hieu chinh vd. kiem dinh mo hinh
2.1.1 Xdy dung ludi tinh sdng viing nude sdu cho todn viing Men Ddng:
Da xay dung ludi tinh sdng cho toan bp vimg bien Dong tir -1°N den 23°N va 99''E den 119°E dupe l4y vdi budc 0,25" x 0,25". 40 tSn sd song duoc tinh tii' 0,0459Hz d^n 1,0 Hz lang theo quy luat logarit vdi budc Af/f^O,l. Cae hudng song dupe chia thanh 72 dai hudng vdi budc la 5°. Sd lan lap cue dai dupe lay la 15 vdi budc tinh 3 gid cho trudng sdng dang phat trien. Tren hinh 1 dua ra ludi tinh sdng vung nude sau cho loan khu vuc Bien Dong.
Hinh 1. Ludi tinh song viing nude sdu cho todn khu vyrc biin Dong (Cdc diem dgc ba biin Id cdc diem chiet xudt ket qud tinh sdng)
liin iifihi Khoa liiii vd ( dug iiiilie Ilien lodn tiui'ic Idu " J^
1 I 2 iiiii'l Idp cdl ddc diem cna md hinh linh .ydn.i^. bleu chinh vd kiem cluing mo "- '•>
linh .sdng Irong hao vd gid miia.
] Chuii so lieu sdng diing trong hieu chmh \;i kii-m chimg md hinh
Dc CO chuoi s i lieu sdim tin ea\ chimg tdi dd su dung sd lieu tai cac tram phao tu gl tram tu ghi tren giiiii khoan vii s i lieu quan trie sdng bang vc linh (lopex/poseidon) l:..r thdi gian CO cac con bao \ a trong gid miia. Trong bang 1 lii'l ke cac con bao \'a cac n g u s i lii-u sir dmm Ironu hicu chmh vii kiim chimg md hinh trong biio. Budc hicu ch.nh la n sire can thiit dd\ vdi^noi md hinh ndi chung va md hinh tinh sdng ndi ricng. Ciic so lieu ghi sdng tai gian khoan Bach Hd trong con biio Muila da d u g c sir dung de hieu chmh n hinh. Bang 2"licl ke cac chuoi sd lieu sir dung Irong kii-m chirng md hinh trong gid miia • trong ciic dieu kien thdi tiin khiic.
/i(ni.i; /. S(i lieu .sdng .sir dun,i; Irong hieu chmh vo kiUm chirng md hinh song Irong hdi Ten biio
[•"rankie
Wukong
Thdi gian 7/1996
1T/T997'
9/2000
Tram do (vi tri. do siiu) Tram phao VNOIA (18.60N106.25i;. 27m)
Irani Phao llua-llin (11 60N 100.301;. 30m)
Tram phao 4001 (17.I6N 107.381;. 30m)
C g quan I T KTI'V Bicn
(IIMC) G I S I D A - Thai
land IIMC
Mue lieu ' du Kii'm chirng i
hinh Kiem chimg
hinh Kii;m chirng
hinh Muila 11/2004 Gkin Khoan. tram MSP-1
(I0.42N I08.39E. 45m)
VictsovPetro Hieu chinh r hinh l.ingl.ing
Kctsana
11/2001 TOPIiX/poseidon N A S A Kiem chimg
hinh 09/2009 TOPEX/poscidon N A S A Kiem chimg
hinh Iking 2- Sd lieu .sdng su dung Irong kiem chung md hinh sdng Irong gid miia vd Irong
cdc dieu kiHn Ihdi liei khdc Thdi gian
01-03/2002 07-09/2002 01/2002 07/2002 01/2003
Tram do Gian Khoan, tram MSP-I Giiin Khoan, tram MSP-I
TOPEX/poscidon TOPEX/poseidon TOPEX/poscidon
Co quan VictsovPetro VictsovPetro NASA NASA NASA 2. Hicu chinh md hinh
Trong md hinh SWAN cd nhicu tham sd vat ly cd t h i d u g c dicu chinh sao cho tao ra cac kiit qua ti'nh song phii hgp vdi thuc l i . Cac tham s i quan trpng nhit lii tham sd dii'U chinh sdng dd Iheo hicu img bac diiu (DEL TA) va tham s i truyin nang lugng eiia gid cho sdng theo Jansscn ( C D S I ) va tham so Iruycn niing lugng ciia gid cho sdng theo Komcn (CDS2) vii he sd xac djnh dp doc ciia sdng theo Piersoil-Moskowitz (STPM) (j). Da sit
'unibanj^iif; Immg. Kv thudl cdng trhili. Van Idi vd Cdng nglie Bien
dung ciic tham si bao trong biio MUII-'A va cac Iham sd sdng do dac tai gian khoan Bach Ho di- hicu chinh md hinh linh sdng. Tir eac ket qua so sanh giua dp cao sdng tinh toan va Ihire do eho Ihay md hinh linh song vdi he so CDS2 la 0.00001 (bing mpl nira so vdi gia trj mac dinh - 0.0000236) cho cac kcl qua gan vdi Ihirc do nhit.
3. Kiem chirng md hinh
Dii sir dung cac si lieu tin cay dc kiem chung md hinh tinh sdng trong cac cmi bao va gid miia (bang 1,2). Cac kel qua kiem chimg cd thi tham khao lai cac lai lieu [4). Tren bang 3 dua ra Ihdng ki; sai sd tinh loan cua dp cao sdng trong cac con bao neu Ircn.
Bang 3. Sai .so linh lodn ciia dp cao .sdng (m) Irong cdc can bdo len Biio
Frankic Linda Wukong Trung binh
Sai Sd BIAS
-0.144 -0.030 -0.078 -0.080
RMS 0.353 0.216 0.393 0.320
Kcl qua lir ba trudng hpp nay cho th4y irung binh gia tri BIAS la am. di6u nay co nghTa la chieu cao song tinh toan nho hon chiSu cao song do dac. Trung binh gia Irj RMS la 0.320m CO the chap nhan dupe so vdi chieu cao song Irong bao [4].
2.1.3 Xdy dung lu&i vd mat cat tinh lan truyen sdng tir vitng nude sdu vdo bd a. Lirdi tinh lan truyen .sdng theo md hinh STWA VE: Ludi linh lan iruydn song lii' viing nude sau vao bd duoc xay dung theo cac tieu ehi sau:
- Bicn ngoai khoi - vimg nude sau ciia ludi tinh phai dam bao sao eho cac song khdi diem lan iruycn vao trong bd dupe coi la song viing nude sau (dp sau phai Idn han 1/2 budc sdng.
- Bien dpng ve dp sau dpc theo bien ngoai khoi cua ludi linh phai khong ldn de co the coi nhu cac sdng dgc theo bien ngoai khoi la dong nhat - chi co mot sdng truyen tir ngoai khoi vao viing ven bd. De dat dupe yeu cau nay, thudng ludi linh song dupe lay sao cho song song vdi dudng bd hoac dudng dang sau ngoai ciing. Ludi tinh song co true song song vdi dudng bd cung tiet kiem dupe bp nhd, sao cho co it diem mit ludi nam tren dat lien nhat.
- Budc ludi tinh sdng lan truyen vao viing ven bd phai thoa man muc tieu nghien ciiu ve trudng song viing ven bd. Vdi bai toan cu the la nghien cuu trudng sdng cue dai phuc vu thiet ke eong trinh bien ven bd budc ludi can phai du nho de cd the linh toan dupe bien ddi trudng song tai cae vimg phirc tap nh4t nhu cae dao, lu6ng lach, cira song. D6i vdi khu vuc nghien cuu dpc bd bien Viel Nam tren ca sd dp bien dpng kha phiic tap ciia dudng bd (vdi su hien dien ciia cac cira sdng, miii da, dao vv...) chiing toi da chpn budc ludi tinh chi tiet la 200m x 200m cho cac viing linh song lan truyen tir viing nude sau vao viing ven bd.
- Ludi tinh sdng chi tiet viing ven bd ciing can phai phii hap vdi ludi tinh sdng viing nude sau. Tot nhal la hai ludi tren phai eo cac true ciing iheo mpt hudng tir dd co the chiet
lldi nghi Khoa hoc vd ( dug nghc Bicu lodn cpioc far
xuiil duac chinh xac eiic .so lieu diiu vi\ cua mo hinh linh .stSng vimg nmrc s;Ut lam ^c icu diiu vao cua nio hinh linh sting \ img \cn bd Dicu nay nhieu khi sc khiing phii hop \ a i scu CL\U lii}l kicni ho nhd -- ludi tinh song phai song song \ d i duiyng bd. Trong irudng huu t:ii ihC' cLia tirntz vimg lu\ ludi linh song viing nude sau theo eac true kinh \T nhung ehiiny i6i da \:i> dung cac ludi linh sdng chi liei \iing \-en bd theo song song \ d i dudng bd de ;hoa man di(}u kien ciic sting \ ung mrdc siiu dpc ihco bien bien kh(.ri d u a c cui lii dimg nh;ii vii liti'l kicm bp nhd.
Vii diiC'u cu6i cimg can ihoa miin lii \'di ht) nhd may tinh cti han ludi linh sting lan lru\ en lir \ iing nirtVc sau \ iio bd khting dut.rc qua Idn.
DC' ihoa man ciic \t:u cau neu tren da ihiCt liip long cong 14 krdi linh lan iruyen Ming gom: \iing Quanu Ninh - Quang Nam: 5 ludi; Viing Quang Nam - Vung Tiiu: 5 lmii va xiing Viing I iiu - Kien (iiang: 4 lutVi.
h Mat cdl linh lan Inn On sdng theo md hinh SU'.W-I D: Tren timg ludi linh .sting 2!) da liip ciic tnal cfll linh sting lii bicn ngoiii bicn khtri ciui lutii linh song viio bd Ngu\cn ly chung de lap ctic mill cm niiy lii khoiing ciieh giua ciic nial cat khtiang 20 km. Tong cong da
\ii\ tkrng duac 191 mai ciil irong dtS co 50 miit cai cho khu \ u c lir Quang Ninh den Quan-;
Nam: 82 miii ciil cho khu \ uc lir Quiing Nam dC-n Vung Tau vii 59 mat ciil cho khu vuc lir Vung I'iiu den Kicn Ciiiing.
2.2 Tinh cdc tham so sdng vdng nude vdi cdc chu ky lap khdc nhau
Su dung chutM sd lieu biio ihiing ke duac dii lien hiinh linh loan ciie tliam so sting LUC dai cho ciic ctTii bao ihco nui hinh SWAN \ a Iheo phuong phap tinh sting Irong biio ihuc nghiem Brelchneider \S\. Dira vao cac ket qua tinh loan sir dung quy luai phiin bo che do song \iing bien siiu dii nhiin duac cac iham so song \ d i ciic chu ky lap khac nhau cho Uil ca cac ludi tinh tai 3 viing (xem bang 4)
Bang 4. Cdc tham sd sdng viing nude sdu vdi cdc chu ky- igi) khdc nhau Viing
E
ang N
a
I
z
Quan
Ludi tinh
1
2
3
4 5
Yiu li Ilsig [ml T[sl Ilsig [ml T[sl Ilsia [ml r [si Hsig
[ml T[sl Hsig
Chu ky liip [niiml 10
9.65 11.8 8.43 10.9 10.72
12.5 9.73 11.8 10.51
20 10.09
12.1 8.81 11.2 11.20
12.9 10.18
12.1 11.04
50 10.67
12.5 9.31 11.5 11.84
13.3 10.76 12.6 11.75
100 11.11
12.8 9.69 11.8 12.33
13.6 11.20 12.9 12.28
125 11.25
12.9 9.82 11.9 12.49 13.7 11.34 12.9 12.45
150 11.36
13.0 9.92 12.0 12.61 13.8 11.46 13.0 12.59
200 11.54
13.1 10.08 12.1 12.82 13.9 11.64
13.1 12.81
t -l-jeuhiin Ndng In,nig. Kv thudl edng Irinh. Van lai vd ('ong iiglK Bien
I—
i
c
>
CD
o
c
5
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Cfl
>
6
7
8
9
10
11
12
13
14
[ [ml T [si Hsig [ml Tlsl r Hsig
Im]
T (si Hsig [m]
T [si Hsig [ml T[s]
Hsig [ml T[sl Hsig 1ml Tlsl Hsig [m]
T[s]
Ilsig [ml T [ s | Hsig [m]
T[s]
_V2A, 11.79
13.3 11.79
13 3 11.79 13.3 9.40 11.6 9.40 11.6 8.22 10.7 5.32 8.4 4 70
7.9 4.35
7.6 12.7 12.39 136 12.39 13.6 12.39 13.6 9.88 11.9 9.88 11.9 8.64 11.0 5.59 8.7 4.94
8.1 4.57
7.8 13.2 13.19
14.2 13.19
14.2 13.19
14.2 10.51 12,4 10.51 12.4 9.19 11.4 5.95 9.0 5.25 8.4 4.86
8.0 13.6 13.79
14.6 13.79 14.6 13.79
14.6 10.99 12.7 10.99 12.7 9.61 11.7 6.22 9.2 5.49 8.6 5.08 8.2
13.7 13.98 14.7 13.98 14.7 13.98 14.7 11 14
12.8 11.14 12.8 9.74 11.8 6.31 9.3 5.57 8.7 5.15 8.3
13.8 14.14
14.8 14.14
14.8 14.14
14.8 11.27 12.9 11.27 12.9 9.85 11.9 6.38 9.3 5 63
8.7 5.21
8.3 13.9 14 39
14.9 14 39
14 9 14.39 14.9 11.47 13,0 11,47
13,0 10 03
12,0 6,49 9,4 5,73
8.8 5.30
8,4
3. Tinh lan truyin song tir vung nuoc sau vao bd
Sau khi cd dugc Irudng sdng viing nude sau lai 3 viing cu the vdi 14 ludi tinh sdng eho khu vuc ven biin tir Quang Ninh din Ha Tien, da tien hanh tinh loan lan Iruyen sdng vao viing ven bd vdi cac Iham si viing ngoai khoi cd chu ky lap khac nhau nhu da Ihdng ke tren bang 4. Ddi vdi moi chu ky lap da sir dung cae kit qua tinh mirc nude (thiy trieu va nude dang) vdi eiing chu ky lap nhan dugc ciia nhdm linh Ihiiy triiu va nude dang. Cac tinh loan cu thi bag gdm tinh sdng Ian truyin tir viing nude sau vao chan de theo mo hinh 2D: STWAVE va linh sdng lan truyin vao chan de tren cac mat cat cu the Iheo mo hinh SWAN-1D. Dudi day Irinh bay chi tiit cac kit qua tinh loan theo hai phuong hudng nay:
Hdi nghi Khoa hoc vd ( 'dng light' Bicn lodn ijiidc tdn ih-
3.1 Tinh sdng vdi cdc chu ky lap khdc nhau theo phuong phdp tinh lau truyen son.' 2D tir vung nude sdu vdo bd sir dung md hinh STWA VE
Mo hinh Itnh lan iruNc'ii sting lii \ ung nirtVc siiu \iit) chiin de lii nx)L nn") hinh hai cincu linh cho irutVng .song on dinh. co linh dC-n ciic qua Irinh bien dang, khue xa va npi nhiiiu \ a t:uii irutrng sting \'iing \'cn hd dirdi tac dpng cim dia hinh day bien \'a dudng bd | 6 | ^'cu dii^m Idn nhfil khi sir dung mo hinh niiy lii do \ img linh lii mpl \ img rt)ng ldn nen vice i uiji den biti-n dpng muc nirtVc dti thiiy Iricu va nude diing irong bao phai chiip nhan la ciic gia tri mut; nirtVc nay Irung binh eho toim viing. Ngoiii ra mo hinh S I W'-WM chi cho la c.ic Iham sti linh loan la dp cao sting hiru hicu. hudng \'ii chu ky song luang iing. irong khi do dC' phuc \ u Ihiel ki} de bien ciin co ciie ihting lin chi licl ve chu ky d i n h p h o mat dt) (R 11').
chu ky Irung binh luycl doi (TMOl). chu ky irung binh luycl doi cat dutVng so khting (TM02}.Thcm \ a o dti \ icc chicl xual cu IhC- ciic iham so song iheo ciic mai ciil ciing khii phirc lap so \(i'i md hinh I D. Ciie linh loan cu ihe ihco mo hinh S TWAVl-!! cho liing \i)ng ban gtim sir dung cac iham sti song s'iing nirtic siiu lai bang 4 liim sd lieu diiu \iio tinh lan Iruyen sting (i;r bicn ngoai \ a o chiin de. vdi hudng song lii lurdng vuong gtic \ d i bien ngoiii khai ciia lutVi linh song,
Ciic kel qua dua ra la so do phiin bo dp cao vii hudng song cho tirng hinh the tinh Uuln cu ihc irng vtVi moi lutVi linh va lile ghi cac tham so song gom dp cao, chu ky va huting song.
3.2 Tinh sdng vdi cdc chn ky lap khdc nhau theo nid hinh SWAN-ID
IX' diip ling cac yeu ciiu chi tiel ve .\ay dung ciic mat cat Irui^ng song linh san phuc \ LI linh uuin ihiel kc dc bien noi riC'ng va cong irinh bicn ven bd noi chung. chiing loi da sir dung mo hinh SWAN linh theo phuang an mpl chieu ( S W A N - I D ) [7]. Cac iham so diiu viio hao gom:
- S i r dijng ciic Iham st> song viing nude siiu tai biing 4 liim so lieu dau viio linh lan Iruycn song tir bicn ngoai viio chan dc;
- Sir dung cao dp ciia muc nude trieu va nude diing vdi chu ky lap luong irng ciia nhtim linh thuy trieu va nude diing cong vdi muc nude trung binh trong moi ldn tinh.
De CO dupe phan bo chi lict cac iham so song tai khu virc sal chan dc nen budc ludi Irong khoang cdch lir chdn dc ra khoi 500m duac Idy vdi gia tri la SOm, ngoai khoang cdch do budc tinh dupe lay la lOOm. Cac k a qua linh cac tham sd sdng bao gdm: dp cao song hull hieu. chu ky dinh phd ph6 m^t dp (RTP). chu ky trung binh tuyet ddi (TMOl), chu ky trung binh tuyet doi cSt dudng so khong (TM02), muc nude dang do sdng dupe dua ra cimg vdi khodng each tir bd va dp sau (dp sau dupe cong vdi muc nude dang do song). Da xay dung cac bang kcl qua linh sdn cac tham s6 song vdi cdc chu ky lap khdc nhau Irong gidi han 1km ke tir chan de ra khoi vdi budc ludi 50m d i n khodng each cdch chan dc 500m va budc ludi 100m con lai.
Tai hinh 2 dua ra thi du \h s o d6 phan bd dp cao song vdi chu ky lap 100 nam cho ludi linh so 7 va so 8 (Binh Djnh - Phu Yen va Phii Yen - Khanh Hoa) va bdng 5 dua ra thi du
bang linh song lan truy£n theo mo hinh SWAN-1D. r
Tieu ban Nan^ Imms. Ky thudl cdng trinh. Van tdi vd Cdngjighe^ien_
Kinh 2a. Phdn bd do cao song vdi chu ky lap 100 ndm tgi khu vuc Binh Dinh Phu Yen
Hinh 2b. Phdn bo do cao sdng v&i chu ky lap 100 ndm tgi khu vuc Phu Yen - Khanh Hda Bdng 5. Bdng thi du ve mot phdn kit qud tinh song lan truyen theo mo hinh SWAN-ID
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4. Tinh song true tiep tii cac yiu to tao siinR cho cac viing ven bd khong chiu a.ii hudng cua trudng sdng ngoiii khoi
Dii vdi cac khu vuc vimg, NJnh kin. \iing cua sdng dugc che khuiil khdng ehiu ,iiih huoim ciia trudng sdng ngoai khoi da tiin hiinh lap cac bang linh cac tham sd sdng ;hco cac >cu li lao sdng gdm t"dc do gid. da song vii do sau. Dua viio ciic bang niiy cd the \ac dinh tiroim ddi do cao \'a chu k> sdng cho cac khu \lie nghien ciru \di cac khoang l,"» dp gid. dii song \£i dp sau cho trudc, Di tinh chi tiit co the sir dung phiin mem linh sdng li.co phmme phiip SMB |5] \di ciie tham si diu viio lii tdc do gid. dii sdng vii do siiu,
5. Ket luan
Cac kit qua nghien ciru ciia nhdm tac gia lii tinh loan cac tham sdsdng \Ting lurdi sim phuc \ u xiiv dung edng trinh biin ven bd ndi chung va diiet kc di; bien ndi riC-ng. Ddi \ di vice thiit ki di- biin dii cd mgl budc cai liin dang ke so vdi ndi dung ciia hudng diin lliiiit kc di- bien 14 TCN-130-2002 [2], Vice tinh san cac tham so sdng vdi cac ehu ky lap khiic nhau cho cac mat cit (phiin bu kha day cho toiin diii ven bicn nude la) eho phcp ky sir thiet ki cd Ihi ndi xuy true tiip kit qua nay cho khu virc thiol kc thi cdng dc bicn. Ngoiii ra ciic kit quii tinh song theo cac mat cit nay da tinh din ca lac ddng cua muc nuoc gay ra do thiiy triiu \a nude diing do bao vdi ehu ky lap luong ung. Trong trudng hgp khu \irc Ihicl ki di- biin chju tac ddng eiia dia hinh phuc tap giiy ra do cae hii;u ung khiie xa cd the sir dung kit qua tinh sSn lan Iruyin sdng theo md hinh STWAVIi Ddi vdi ciie khu \yrc duac che chill khdng ehju iinh hudng ciia trudng sdng ngoai khoi cd the- sir dung phan mem IBASi; di linh sdng theo cac )'cu Id lao sdng.
TAI LIEU TUAM KIIAO
1, Greg J. Holland, "An Analytic model of the wind and pressure prolile in hurricanes".
Monthly weather review, volume 106, March 1980.
2,1 ludng din Thiel ki di; biin, Tieu chuin Nganh 14 TCN 130-2002, Bg NN&PTNT 3, Nguyen Manh Hung. Do Le Thuy. Duong Cong Dien. "Storm wave modeling \Nith SW./\N, Comparison of measurement dala and modeling results for the storm MUII'A 11/2004", Vietnam Journal of Mechanics, Volume 27, Number 4, 2005,
4, Nguyen Manh Hung, Duong Cong Dien, "Calibration and verification of a storm wave model in the coastal zones of the East Sea". The annual national conference for lluid mechanics 2006, Vung Tau 07/2006
5, Shore Protection Manual Coastal Engineering Research Center, US Navy. 1984.
6, Smith .1. Mc., Sherlock A. R. and Ressio D. T, Stwave: Steady-State Spectral Wa\e ModekUser's manual for Stwave version 3,0, Department of the Army, U,S, Army Corps of Engineers, Washington, DC 2/2001,
7, Smm - U.ser Manual. Smtn Cycle III version 40.41. Delft University of Technology, 2005 8, The Software FBASE version 1,20 Delft Hydraulics, Project VIW/87/020. UNDP. 1989