BO
KHOA H(PC
VA
CONG NGHE
CHirONG
TRINH KHCN CAP NHA
NlTOfC
KC
08/06-10
B6
TAI:
"Nghiin cAu cas&khoa
hgc
vA dexudt cdc giii
phdp
khoa hgc cdng
ngh$
bio dam
sif
on
dfnh
vd
d^
bin cda di biin
hi$n
c6 trong truing
hgp
sdng,
triiu
cwemg trdn
qua di"

XAY
RA
TRONG VUNG
BI^N tUT&C
TA
Ca quan chu tri:
Truang
Dai hpc Thuy
Igrj
Chu
nhi#m <Sk
tei:
GS.TS.
Ngo Tri Vieng
Ha
noi,
2010
BO KHOA HOC VA
CONG
NGHE
CHirONG
TRINH KHCN
cAP NHA NU'dC
KC
08/06-10
D6
TAI:
"Nghien cieu
ca
s&

NiyC NU'dC
BE
BI^N
HIEN
CO
Dfi
DANH GIA
TAN
SUAT
VUOT
TAN SUAT
THI^T
Ke
VA XAC D|NH CAC
T6
HgP
SONG,
TRltU
VA
NUaC
DANG CO
THt
XAY RA
TRONG
VilNG
BISN
NU'dC TA
CHU NHIEM
BE
TAI

T6
ANH
HLTONG
&
KHA
NANG
ITNG
PH6
VOl
BlfiN
D6lKHfHAU
6
I.I.HSTH6NGD6BI£NVI$TNAM
6
1.1.1.
Thyc
trjingde
bien
Viet
Nam
6
1.1.2.
'i'eu
ciu
thiit
ki
de
biin den nim
2010.
(Chua

Nam
8
2.
Khi
nang img phd cua
De
biin
9
a.
Nang
cip
de
bien
9
b.
Quy hoach
chlin
lupcdebiin
irng
phd
vdi myc
nude
biin dang
16n
9
1.2
HE
THONG
M6C, CAO
DO

1.3.1
Quan
h?
tuong
tic
dong chiy song vdi dien bien dpng luc viing cda
sdng
ven biSn
Viet
Nam
19
1.3.2.
Mot
si
yeu
ti
ty
nhien
liSn
quan vdi
diin
bien
dOng
lye
vung cira sdng ven biin
ViSt
Nam
20
CHirONGII
30

ti
hpp
theo
mpt
qui
luit
xac dinh
di
c6
muc
nude
thiit
ki
34
III.
XAY
DUNG
DUONG
TAN
SUATMirCNlfOCTONG HOP
34
3.1Casddiili^u
34
3.2
Co sd toan hpc
42
3.3
Tinh toan cac
d^c
trung thiy triiu

Hgp
DQC
THEO
BO
BIEN
NAM
DINH
vA
CAC
TtNH
LAN CAN
TU
THAI
BINH
T(3l
NINH
BINH
71
L Gidi
thiSu
chung
71
II.
Dudng tan suit
myc
nude
ting
hpp tir
Thii
Binh

pha nang ne. Cac
hi^n
tupng mua Idn, gi6
gi$t,
loc xoay ciing
x^y
ra thudng xuyen
hon. Cac nghien
cOru
mdi day nhat tren the gidi cho thay
rSng
s\r
gia
tSng
byi trong khi
quyen do cac hoat
d$ng ciia
con ngudi da lam bien doi cdc qua trinh
nhi$t
dpng
lyc
hpc
trong may,
tSng khd nSng gdy
mua ldn, t6, l6c,
voi rbng vd
mua dd. Tai
nhi^u
noi
tren the gidi,

Van de ndy co the
dupe
xem
xet tren hai mat.
Thtjr
nhat la cae hoat
d6ng
kinh te xa
h6i
tai
vimg
bien va ven bien da
gdy ra nhiing thay ddi
v^
mdi trudng
ty
nhien theo hudng bat
Igi
vd 1dm gia tang thien
tai va
thi?t h£ii ciia
thien tai. Viec xdy
di^g
cdc cong trinh ven bd bien da ngan cdn
dong van chuyen bun cdt tu nhien dpc bd, gay ra bdi lap tai cac luong tau va xoi
Id
bd
tai nhiiu ncri. Cac hd chua nude
dupe
xdy

phdng hp ven bien cdn
dupe
bao
vp
tdt thi de bien khong bi vd. Thur
hai la cdc
ho^t dOng
kinh te xa hpi tren
biin
vd vung ven bien da
t^o
nen su tap trung
rit cao vl cac cdng trinh xay dyng va tai
sdn
cd gia trj cao
ciing
nhu dan cu d vung
ven
biin.
Diiu
ndy ciing lam gia tang
miic
dp
thi^t
hai
m^t
khi
thiSn
tai thdi tiet xay ra.
Thi du, con bdo so 7 (Damrey) nam 2005 cung vdi gid manh da gay song ldn vd

dii
chua dupe
khdng dinh vdi cac bdng chiing day
dii,
nhung mpt so
kit
qud phdn tich gin ddy da cho
thay rang bien doi khi han dang 1dm gia tdng thien tai. Trong nhimg ndm gin day,
nhihig can bao co cudng dp sieu
m^mh
tren bien dudng nhu ngdy cdng trd nen pho
bidn
vd gia tang
siic
tan pha doi vdi kinh tl, xd hpi vd mdi trudng tren pham vi toan
thi
gidi.
Chi trong khodng 15 ndm gin ddy, tai khu vyc Nam A da xuat
hipn
2 can bao
ldn, giet hai hdng trdm ngdn ngudi. Ndm 1993, mpt can bao do bp vao Bangladesh da
gay
nude
dang 1dm 138.000 ngudi
chit
vd mat
tich
va gay nhihig
thi?t
hai vd cung to

vd cd
thi
v5 de, gay
ng|ip lyt
tren
dipn
r^ng
va thiet hai rit ldn
cho vimg ven bien. Vi vay, can co mpt nghien
ciru
xdc dinh lai tin suat myc
nude
de
bien hien cd de ddnh gid tan suit vupt tan suat thiet ke va xac djnh cac to hpp sdng,
trieu vd nude dang ed the xdy ra trong vimg bien nude ta.
CHUONG I
Bt
BIEN
VH:T
NAM,
NHAN
T6
ANH HUdNG & KHA NANG
(TNG
PH6
Vdl
BI4N
B6I
KHi HAU
1.1.

Xay dyng de bien vira li bien phip phdng, chong vua li thich dng vdi bao lut,
nude
biSn
ding vi xam nhip min.
Nude
ta, nim 1410 bit diu dip de
biin.
Tai Ninh
Binh, nam 1471, de Hdng Ddc
cb^y
td Bic Yen Md den Phung Cdng, nim sau trong
dat lien each bd
biin hipn
nay 25km. Be bien thu hai dupe dip nim 1830 d Than Phu -
Dien Hp cich con de thu nhat khoing 8km vdi thdi gian lan bien dii den 369 nam.
Con de thu ba tien ra bien them chimg 7,5km dip vio nhihig nam 1830
-
1927 (97
nam).
Con de thu tu dip vio nam 1959 (32 nam sau) tiin them ra bien
8
km nila.
De
bi6n
Thanh Hoi, Hi Tinh va Bmh Dinh (De Ddng)
dupe
hinh thanh tu
nhiing nam 1929 - 1930. Hiu
h6t
de

ttah
Nmh Thuan vi Btah
Thuan cd
thi
coi nhu chua cd de bien (Ninh
Thu^n
cd 6,23 km, Bmh Thuan cd
10,71
km de
biin
song phin ldn la de cda sdng Cii Phan Rang, Phan Thiit vi ke Mui Ne).
1.1.1. Thyc trang
dS
bien
Vi?t
Nam.
a. Hiu
hit
dip bing dat (de lin bien, ngin min), do din ty xay dyng, chu ddng,
song thiiu qui
ho?ch,
nin
dit
yiu.
Theo chu ky lin
biin
da
t?o
ra
nhi$u M

ddp (phan ldn
la
dat boi, dit cat) thiet bi
ddp,
ky thuat dap khdng ddp
ling
yeu ciu thiit kl.
3) Dp rdng mdt de cdn thieu tir
2 ~ 3
m.
4) Nhiiu tuyin de thiiu hdn rimg
ng|ip
m^
do phd dl nuoi torn, chdt cay liy gd,
hodc do tan pha bdi chit dpc hod hpc
5) Nhieu tuyen de ngudi dan lin chiem
m^t
de
(biin
Tay) 1dm vudn canh tac, nha
cua xay cat trong pham vi tuyin de
biin
1.1.2.
YSu ciu thiit kl
d£
bien
din
nam 2010. (Chva xet
din
tdc dpng cua BDKH)

san xuit, nudi trdng thuy, hdi san thiet ke
chdng gid bao cip 9 vdi
miic
triiu tin suit 5% chip nhan mpt phin song leo tran qua
dinh de khi gio bao vupt
mure
thiit kl nhung khdng gay vd de.
2) Giai phdp ky thuat:
- Cling cd, nang cip cdc tuyin de bien, de
ciia
sdng tao thanh cac tuyin de khep
kin
kit
hpp vdi lam dudng giao thdng vdnh dai ven
biin
nham bdo
v§
ddn sinh, tao ca sd
phdt triln kinh tl
-
xa hpi va ddm bdo an ninh, qu6e phdng;
- Chilu rdng mdt de tdi thiiu tir 5,0 m
din
6,0 m, de phdi
dupe
kien cd, gia cd du
cao trinh chdng vdi
miic
gid bao thiit kl (cip 9, cip 10, khu vyc dan cu cip 12 vdi
miic

bii timg
budc trong cay
chin sdng de dim bio on djnh liu dii;
- Cic tuyen de xung
yiu
tryc di$n vdi bien phii dip them tuyin 2 dy phdng phia
trong nham dim bio an toin cho nhin dan,
him chi thipt hji
khi tuyin I (tayin
t^c
dien vdi bien) bj vd khi gid bao vupt qui khi ning chong dd
ho§c
sdng trin qua;
- Bo tti cic tayin dudng ngang (dudng xuong ci) dl
vira
lim dudng so tin dan, cira
hp de khi xay ra sy c6 de
diiu;
cic tayen dudng niy
sS
cd tic dyng phin vung ven
biin
thinh cic d khep km, dpc lip, nhim giim thieu
di^n tjcb
bi ngap lut, nhiem min,
h^
che
thipt
hai khi xiy ra sy co de
biin;

nirdc
bien ding
d Vi^t
Nam.
Theo nghien cdu
ciia
chiing tdi thi myc nude
biin
ding d vimg ven bien Bic Bp
vi Nam
B0 (biin
Ddng) trung binh tang 2-3 mm/nim theo chudi so myc nude
biin
quan trie dupe trong hon 30 nim (1976
-
2006). Vimg ven
biin
Trung Bd ting trung
btoh 1~2 mm/nam. Nhu viy chung ta ed
thi
khing djnh
din
nim 2010 myc nude bien
dang khdng qua 10 em so vdi nim
1976.
Theo
IPCC,
din 2100
myc nude
biin

kj"
21 myc
nude
bien ting
tomg
binh
1cm
/ 1
nim.
2.
Kha nang irng phd
ciia
Be bien.
a.
NSng
cap
d€
biin.
1)
Thyc
iiipn
thinh cdng Quyet djnh cua Thu tadng Chinh
phii
vl
vipc
nang cip de
biin din
nim
2010.
2)

10,
cip 12, khdng cd
yiu
to nao die trung cho gii trj myc
nude biin
dang len, mic du trong
yiu
td myc nude trieu 5% cd
thi
cd hin quan song
khdng dang kl.
3) Gid bao ciing li
yiu
td chiu tic ddng cua
biin
doi
klii
hiu do lim tang cudng dp
vi tin suit xuit
hi^n
song chi ed tic dung nang cao sdng bien tic thdi. Vi the, trong
Tieu chuin thiit kl de
biin
khdng nen gia tang cip gid bao qui ldn (cd
thi
cip 12 li
dil).
NIU
qui Idn thi ldn
din

cd
d$
an toin thap nhit nude ta song s8 bio
v?
nhiing vung bi
nggp
nhiiu nhat
nude
ta.
5) Xay dyng hp th6ng de
biin
thinh mpt hp thong giao thdng
quic
gia ven bien dim
bio an ninh quoc phdng c6 rimg
ngip
min phdng
h$,
bio
v$
mii. Cic vimg ed dieu
ki$n
cho
pMp
cin xiy dyng tayen de 2, dy
phdng,
thuin lpi cho
vi^c
so tin din khi cd
sycddtaydnde

can xet theo quan diem phat trien lau ben kinh te viing, ket
hop hiiu ca
giira
kinh te bien va kinh te dat lien va chien lupc dam bao an ninh quoc
phong. Can cd qui hoach de bien vdi tam nhin xa 20 nam, 50 nam, 70 nam va tinh
chat pham vi xem xet rpng ldn
hem
va khong on djnh so vdi de song vi no anh hudng
ciia
cac cira sdng.
ciia
dia hinh - dja
mao
lan can, dong thdi chiu tac
dgng ciia
nen dja
chat tren toan tuyen. Ddc biet la chju tac dpng
ciia
bien doi khi hau sau sac.
Da den
liic
can nhan thuc de bien co mpt vi tri chien lupc, Id
sir
ton vong cua
quoc gia.
1.2 HE THONG MOC, CAO
DO PHVC Vy XiNH
TOAN
Ml/C NlT^C
BI£N

thi ven
biin
Bic bp vi Thanh Hda so "0 hii do" thip
hem
so "0 lyc dja" khoing 1,9 m.
(3) Cao dp sdng Hong (moc dupe gin tai tadng cua Bp Thuy lpi cd) cd cao
dO
+10,80m. Cao dp niy thap hon "0 lye dja" li +0,162 m.
(4) Cao dp Qu6c gia, liy theo so "0 lye dja". Moc hien tai dit tai Hdn Diu (inh 1)
Moc "0 lyc dja" thdi Phip
hipn
cdn d dip Diy, dip Bai Thupng Thanh Hda
Nam
1994
da hoin thinh
hipu
chinh cao dp cac
tr^m
thuy vin theo cao dp Qude
Gia thing nhit trong toan
quic
(trd
m^t
s6
trgm
Hii vin van cdn liy theo so 0 hii do)
Ngoai 4 loai cao dp ndi trdn, trudc 1994 do
chiln tanh
cic mdc bi dinh mit
hay bi phi nen timg dja phuong sir dyng mdt s6

Cic moc cao dp trong ving - Quan
h|
giii-a
chiing.
Sy nhan
d^ng
vi so dd
b$
thong cic loai mdc dd. Thdng qua cac tii lieu thu
thap dupe ttong phdng va ngoii thyc dia, chung tdi nit ra mdt sd nhan xet sau:
a.
CA
hai
h|
thong binh
cbu4n
d^c
d
Nam bp li:
1) Hp thdng binh chuin
d?ic
Rignier, do Sd Dia du Ddng Duong
tliilt
lip vao giiia
nhihig nim
1903
-
1914
liy theo myc nude
biin

dinh tan bdng ddng dd, cd ghi so
lipu
ben canh mue tieu, tuy nhien cd vdi myc tieu khdng ghi so
Upu.
Vao ndm 1967,
Cye
Do
d£ic
quan dodn cdng binh My cd
d§t
them mpt
h?
thong
moc cao dp
t$p
trung chu
yiu
d xa
Ip
BiSn Hda, Lien tmh Ip 15, quoc
Ip
15 khu quan
sir
cua My nhu kho Long Bmh, khu Long Thanh, khu Nha
B^,
edng Sai Gon
b.
Ngo^i
4
h$

thong mdc Nam Triiu
Ti6n,
hi^n
rit it, con le te d
mOt
so vung quanh
Thanh phd Hd Chi Minh.
Trong 7 he thdng neu tren, he thing mdc cao dp
ciia
Nha Dia du Qude Gia (Ba
Lat) NGD hoan chinh
hon
ca. Thdi gian xdy dung
h?
thdng NGD khoang 8 ndm. Ndm
1964 - 1966 thiit lap va do
d^c
dia hinh; Nam 1964 - 1968 tinh toan vd tir cudi nam
1968 kilm tra lai cdc ket qud
tnidc
dd. Dua vao nhimg tai
li?u
thu thap
dupe
d cac
tinh, chiing tdi
ISn
sa dd hp thdng moc NGD toan Ddng bdng Sdng
Ciiu
Long va Ddng

Chiing tdi dd kilm tra va
din
I^i
moc cho 15 tram chinh tren Ddng Bdng Sdng
Ciiu
Long va Dong Nai. Trong s6 dd cd 4 tram do cho ket qud cao dp khac vdi tri sd
cii tir 0,24m
d6n +l,00m
va bo chinh cao dp
tuy?t dii
theo NGD cho hai
tmm
do trudc
ddy chua cd (bdng 1.1)
Bang 1.1 Cao
d$
H (o) cua mpt so
tr^m Thdy
vin d Dong bing Nam Bp co sy
khic
bift
do Doin SHI (Sai hpc Thuy Lpi kiem tra lai).
Tr?m
T.V
Vimg Tiu
Mpc Hda
Bien Hda
Tri Vinh
GdDouHa
Rach

ghi trong vin
bin, chung tdi nghi ngd li cdn cd so
hipu
chinh chenh
Ipch
rieng cho tdng vimg quy
ude,
hay li sy nhim
lin
sai sdt (3). Vi
dy.
Trim
Thily
vin
R^ch
Gii, theo moc Hansi
133 -
Xn
- C tinh theo NGD (trong sin cdng quin
R^ich
Gii) lai phii -1,00m mdi cin
bang myc nude so vdi tii
ii^u
cu.
d
Gd Diu Ha ciing
v|y
- nlu liy theo moc cao dp hien tai thi myc nude cao
nhit trong
miia

"O"
niy khdng gidng nhau. Theo vin bin de lai
tlii
cao dp
"O"
cua
cic
losi
bin dl cua Sd Dia du Ddng Duong (SGI) li tmh theo mdc cua
Regnier.
Mudn
dua vl cao
d?
Lefebre phii cpng them
m$t s6 hi^u chhih
+0,463.
Thyc tl
diiu
dd chi
diing cho vi tri Vung
Tiu,
ncri ma cd
dO
sai
Ipch
giiia hai
mic
Resgnier, qua dieu cha
thyc dia vl tudi, tiSu ty chiy d cic tinh Cdu Long,
Tiin

Phan Thiit.
- So "O" Nivellement Gdnerad (NG) dupe ning cao len
5,928
-
5,8809 = 0,0471
Giii thich
vipe
sua chila BCD tai
R^ich
Dira (Vung Tiu):
-
True
dia CBD so
hipu FZl
i (230 - XVI -1) ed 2 cao dp do Nha Dia Du cung
cip.
+ Cao dp +5,928 di cd tir ttudc
1955,
chua bo
cUnh.
+ Cao dp+5,8809
=
0,0471
Ty edng tic bing giang (TCTHG) dang ip dyng cao dp
5,928
dl qui dinh
"O"
GCD
cila
mia nude miy

may boat ddng
Igi
vdi miy cu tryc ddng cua Tiy
Dire.
Dat miy mdi ngiy
24 - 12 -
1977
theo miy frye ngang cua My.
Thuy chi cu
d^t
sit nen cao hon diem
miit hipn
tai khoing 0,20m.
Thyc ra cao
d$
Resgnier da ghi
sin
ngay tren moc li
+6,391.
Nlu dua vl he
thing Mui Nai
sS
la
+5,881
(theo Ty Thuy
D?o).
+
5,928
(Ty Hing Giang) vdi
d0 cMnh

AH cho phep.
Anh 2: Tram Hai van Quy Nhon - Binh Djnh
Nam 1984: Cao dp gia djnh, xay lai moc chinh phia ha
luu
tuyin do
idioang
9,50m,
R<,
=+3,585
Mdc cing Qui Nhon -0 (Theo td ky thuat cap)
Rai RP (Cou Ddi): +3,014. Ngay
1
l-K-1985,
xi
nghipp
KSTK Thuy lpi - Thuy
dien dan cao dp qude gia tir cau ddi den chen thuy chi tram li: -1404. Thuc te mdc
0,00 cua thiiy chi
dupe
gii djnh li 0,200. Vay cao dp thuc la -1,604.
3) Theo "Chuang trinh Dieu tra nghien
ciiu
bien KHCN -06, De tai: 06-06:
Nghien
ciiu
xic
lap
chuan "O" dp siu quoc gia phan
lanh the
"VN nam

hf
thing cao
vi
chSnh I$ch
giu^
cao
d$
QG vdi
b$
cao dp cii
(Z^)
Tram TV
Ciia
cim
Tmng Trang
Tiin
Tien
Do Nghi
Ddng Xuyen
Kien An
Chanh Cha
Cao Kenh
Quang Phyc
Ha
Npi
Phii Hie
Din
Trieu
Hon Dau
Pha Lai

Van lie
Hong
Hing
Kinh Thiy
Thai Binh
Lupc
TraLy
TriLy
TraLy
Hdng
Hdng
Dao
Ninh
Co
Diy
Hoing Long
Diy
Chu
Mi
Mi
Cao dp cu (m)
Zc
Tr^i si
4.150
2.430
2.281
2.770
3.016
1.829
3.565

Song Hong
Song
Hing
Song
Hing
Song Hong
S6ng Hong
Sdng Hong
Song Hong
HaiDi
Phip CD
B.Bp cu
B.Bp cu
B.Bp cu
B.Bp cu
TuyetDii
Gia
Djnh
Song Hong
Song
King
S.H6ng
S.Hing
S.Hing
TL.
Thanh
Hoa
TL.Thanh
Hoa
S.H6ng

-2.146
-0,142
-0,228
-0,145
-0,317
-0,411
-0,215
-0,284
-0,039
-0,162
-0,262
-0,27
-1,90
0,004
-0,074
-0,279
-0,009
-0,185
0,012
0,453
0,403
0,218
-0,288
-0,229
-0,253
0.132
0.022
-0,217
Tiiim
TV

Tin
My
Ninh Hoa
Phii
Lam
Bing
Son
Bien Hda
Thu Diu
Mpt
Diu Tiing
Sdng
Lta
Yen
Len
Lam
Lam
Ciia
Nhupng
La
Len
Biing
NhltL?
Gianh
NhjtLe
CamLp
Cda Viet
Thach HSn
Bl
Huong

1.863
1.662
2.010
3.234
1.364
6.060
5.220
4.520
2.759
5.789
2.636
900
5.713
14.042
44.209
5.766
8.017
8.000
2.863
1.755
10.000
H?
cao dp
TL.
Thanh
H6a
TL.
Thanh
Hda
TL.Thanh

Gii
djnh
Cao dp QG
Zqo(ra)
5.506
1.913
5.435
1.853
3.630
2.241
5.676
2.737
2.568
2.063
1.863
2.454
3.193
0.461
5.933
4.22
3.562
1.967
4.916
2.739
8.189
4.845
35.374
43.448
5.653
4.680

-0,113
-3,337
0,729
0,146
-0,078
-6,587
Trjm
TV
Go Dau
Hj
Phii
An
Tan
An
Tra Vinh
Ben Luc
Mpc Hoa
Kien Binh
MjlTho
Van
Kinh
Cai Lay
Chp Lach
Binh Dai
BenTrai
M^
Thuin
CinTho
Dai Ngai
Phung

06
Tien
Tiin
Rach Bai Rai
Ham Luong
Ciia Dili
Co Chien
Tiin
Hiu
H?u
K.Cai
Ldn
K.XaNd
My Thanh
Kien Giang
Kenh
K.Cii
Ldn
Gh6nh
Hao
Ghlnh
Hao
K.QL-P.Hi?p
Cda
Ldn
Tiin
Kenh
Hiu
R.OngHau
Trudng

1.541
2.780
3.930
2.800
H§
cao dp
Mui Nai
MQi Nai
MQi Nai
MQi Nai
Tuy^t
doi
MQi Nai
MQi Nai
MQi Nai
MQi Nai
Gii djnh
MQi Nai
MQi Nai
MQi Nai
Mui Nai
Gii
djnh
Gia djnh
Gia
dinh
MQi Nai
MQi Nai
Mui Nai
Mui Nai

0.312
0.939
1.515
0.622
0.832
1.921
1.626
2.535
3.657
2536
Chenh
l?ch
ZQo-Zccm)
-0,178
-0,108
-0,4003
-0,16
-0,151
-1,722
-1.075
-0,092
0,464
-0,270
-0,320
0,421
-0,672
-0,361
-0,399
-0,372
-0,314

5.625
4.909
3.626
4.218
H?
cao dp
MQi Nai
Mui Nai
Gii djnh
Gii djnh
Cao dp QG
Z(iG(m)
5.466
4.863
2.458
3.120
Chenh lech
Zgo-Zccm)
-0,159
-0,046
-1,168
-1,098
1.3. CAC TAC NHAN ANH
HlTdNG
D^N
DI£N
B1±N
DlTdNG Bd
BI£N
1.3.1 Quan

ty chiim uu
thi.
Sau nim 1930 phit triln bdi xdi ra phia Bic vi
phia Nam. TCr nim 1970 ttd
\^i
day, hi$n tupng xdi
Id
bd da
diin
ra hiu khip cic bd
cua cic ttoh ven bien.
Lipu
sau bao nhieu nam niia thi trd
Iji
t-ang
thii In dinh ban diu hay la xu
th6
xdi
Id
vin
tiip
tyc
k^o
dii mai khi tic
d^ng
cua
biin dii
khi hau toin ciu cdn
diin
ra

thuj'
triiu, ddng triiu
li.
Bd biin: Bao gom dja htoh, dja
mao,
dit di, dirt gay, tan kiln tao.
d. Con
ngirdi:
Bao gom khai hoang - lin
biin
- cing, khai khoing, trdng vi phi rimg
diu nguin, rimg ngip min, khai fliic san
hd,
xay dyng
hi
chiia, dip, phit thii
/ /
//
D6NG S6NG
Lu,
biin
cat, nguon
nude
DONG BIEN
Sdng,
nude
ddng do gid, bdo
Nude
bien dang, d6ng ven
Thuy

CCTA
SONG
Hinh 1.1: So dd cac tac nhan den xdi
Id
boi
lip
bd
bidn,
cira sdng
Nhu vay,
tiiy
theo timg vimg khac nhau md
miic
dd dnh hudng cua cdc tdc nhdn
gay nen dien bien bd bien la khac nhau. Qua do cd the danh gia mpt
each
so bd
miic
dp dnh hudng cua ddng chdy sdng
din
de cita sdng ven
biin
timg vimg.
L3.2.
Mot so
yiu
to ta
nhi@n
lien quan
vol

tdc vdi cac yeu td
d^ng
lire
khdc viing
ciia
sdng ven
biin
So dd phdn viing
miia
lu,
miia
can ven
biin
Vi^t
Nam
dupe
thi
hi?n
trong bang
1.3. Trong bdng tai
c0t
thii
3,
tii
so la
miia
lu, mau so la
miia
can, sd La MS trong
ngo^c dom

12
Ranh gidi
Mdng Cii-Ha
Coi
Dam Ha - Cam Phi
Hdng Gai - Yen Hung
Hai Phdng - Thanh Hoi
Quynh Luu - Can Lpc
Tb?ch
Hi - Bo
Trjeh
Ddng Hdi - Hii Ling
Phong Dien - Cam Ranh
Ninh Thuin
Bmh Thuan
Vung
Tiu —
Ci Mau
Rach Gii-Ha
TiSn
Miia mua
Miia
khd
V(VI)-K
X-IV(V)
V(VI)-X
X-IV(V)
V(VI)-IX
X-IV(V)
V(VI)-X

d$
gid Idn nhat quan trac
[11]
TT
I
2
3
4
5
Ranh
gidi
Quing Nmh
Hii Phdng
-
Nmh Btoh
Thanh Hoi - Nghp An
Ha
Tinh
Quing Bmh - Quing Trj
Vmax (m/s)
40-45
45-50
35-40
45-50
35-40
6
7
8
9
10

4
5
6
7
8
9
10
Ranh gidi
Mdng Cii - Hong Gai
Yin Hung -
Tam
Dipp
Nga Son - Can LOc
Thach
Hi
- Tu Nghia
Mp
Diic
- Cam Ranh
Ninh Hii - Bic Bmh
Him Thuin - Him Tan
VGng
Tiu
- Gd Cdng
Tra Vinh - Sdc Trang
Bac Lieu - Rach Gii - Hi Tien
Xo(mm)
2000 - 3000
1600 - 2000
1600 - 2000

3
4
5
6
7
8
Ranh gidi
Mdng Cii - Hdng Gai
Ven
biin
Hii Phdng - Thanh Hoi
Quynh Luu - Cam Nhupng
KyAnh-BdTrach
Ddng
Hdi - Cam Ranh
Ntoh
Thuin
BtohThuIn
Vung
Tiu
- Gd Cdng
Mua mua
Mualdid
V-K
X-IV
VI-X
XI-V
vm-xi
xii-vn
IX-XI

mua
theo
2 chi
tieu: lupng
mua nim
trung binh nhiiu
nim
Xo
(mm)
vi
lupng
mua
ngiy
ldn
nhat
Xi„j™,
(10 vung
-
bing
1.5)
So do phin vimg
mda
mua,
miia
khd
(10
vimg-bing
1.6)
So do phin vung mdc
dp inh

Quynh
Liru
-
Can
L0c
Thach Hd -
Bo
Trach
Ddng Hdi
-
Cam Ranh
Ninh
Thu?in
-
Binh Thuan
Viing Tdu
-
Cd Mau
RachGid-HaTiSn
Miic
dp anh
hudng
lii
M^inh
YIU
Trung binh
Trung binh manh
Manh
Tnmg binh manh
Yiu

Ngh^
An -
Quing Binh
Quing
Tri
Thira
Thidn
-
Hul
Di
Ning
-
Quing Nam
Quing NgSi
-
Nha Trang
Cam Ranh -
Miii
Ne
Chi d$
trieu
Nhit triiu
diu
thuan nhat
Nhit triiu khdng deu
Ban nhit triiu khdng
diu
Bin
nh^t
triiu

Phan
Thiit-Ham
Tin
Vitag
Tiu - Mui Ci Mau
Mui Ci Mau - Ha Tien
Chi
dp triiu
diu
la chu
yiu
T^ip
triiu bin nhit triiu
khdng
diu
li chu yeu
Bin nhit
tiiu
khdng deu
T^p
triiu bin
nh^t tripu
khdng
diu
li
chii yiu
Dp ldn triiu (cm)
2,0 ~
2,5
m

biin
khdng sau thoai
bso =30m (dO
sau cinh bd li 50
km)
Dp siu
biin
ldn hon (I)
Dp siu
biin
ldn hon (I) vi (II)
hso a50m
Dp sau bien Idn hon (I), (II),
(m)
hso =100
m
DO
siu
biin
ldn hon (I), (II),
(m),
(rV)
hso
=270 m; h =85 m
Thoii, khdng
die
hso
=5 - 85
m;
h =22 m

timg
dau tu khdi phyc. Nhto chung doan bd
biin
tir Mdng Cii
din
Nga Son vi ven
bien Nam Bd, rimg ngap
m^
cdn gill dupe nhieu quin xa, nhiiu
loii.
Cdn ven
biin
Trung
BO
hi tin phi manh,
si
loai bj giim,
diOn
tich bj thu hpp rat ldn.
So dd phan vung cic die
diim
dja
mjo
theo nguon goc phit stoh (10 vimg -
bing 1.10)
Bang 1.10:
Stf
dl phin viing die diim dja
m^o
theo nguon goc phat sinh

CaMau-Rach
Gii
Rach Gii-Ha
Tien
Die
diim
dja
m^o
Bd phin cit xim thyc - kiln tao vimg vjnh, nhiiu dio -
niii sdt,
yiu
tl
biin
thong trj
Bd tmh tu
ding
bing delta, phit trien nhanh,
yiu
td
song chiim uu
thi.
Bd tich ty
ding
bing nhd ven
biin,
xen bd mii mdn di
gflc djng
nui sdt, bd khi bing phing, do
yiu
tl song

Bd tich tu
ria
delta do
biin
li chii
yiu
Bd tich ty
biin
xen bd mii mdn di gdc,
vQng
vjnh va
nhiiu dio nhd,
yiu
tl
biin
li
chii
yiu.