Hien nay, vunq ora song nay nay co cau true vunq ora song hlnh pheu estuary - mot vunq cua song hlnh pheu nhiet dai qio rnua co thuy trieu nh~t trieu bien d9 Ian dien hlnh cua the giai..
Trang 2TET TRONG NGUON CQI VI~T
32-Tucdi cho Iet- Netdepvan h6a lau dai cua nguaiVi~t.
34- Xuan ve n6i chuyen Tet.
36- Danh nhan Vi~t Nam tuoiTY.
38- Nhung Ie h9i dau xuan a Hai Phonq.
TRiTHO'cvATHC11 CUQC
46- Nqay cuoi narn, ai con nhan nhu dieu gl.
47- Hanh phuctronq tam ta
HQI NH~P vA PHAT TRIEN
50- Nhung con so an tuqng ve kinh teVi~t Nam narn 2019.
52-Tong quan kinhte+lai Phonq 2019- Nhln WNgh! quyetXV.
KHOA HQC vA O'NG DVNG
54-10 sl,lkien khoa hQCva cong ngh~ noi bat narn 2019.
58- Nhung cong ngh~ noi b~tt9itrien larnthanhtuu ung dunq khoa hoc,
NGHIEN CO'U- TRAO a61
61- GS.TS.TRAN DUC THANH: D~c trunq co ban ve dieu kien W nhien
vung chien tnronq B9ChDang nam 1288.
72- PGS.TS.DAa MINH QUAN, PGS.TS.VUONG DUC PHUC: Nqhien ceu
h~ thong dieu khien buoc chan vit cua tau Thai Blnh Duong.
KHOA HQC vA O'NG DVNG
77- Tam huyetvoi nqhe, het long VI hoc sinh thanyeu,
79- Vien nqoc sang man rnoi nci dat cang.
83- Gieng lang trong van h6a Vi~t.
86- Phat giao thanh pho Hai Phonq tfch cue tham gia conq tac dam bao
an sinh xa hoi.
90- Nguai anh hung cua bien.
98-Chu9ttrong tuc nguthe giOi.
100-Trang thcxuan.
* Bili bao khoa hoc dang tren T~p chi di dU'C1c chinh sua, hoan thi,n theo
gap y cua phan bi,n
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Abstract
Battle in 1288 is located in the center of the Bach Dang estuarine area At present, it is an estuary situated in the tropical monsoon zone with regularly diurnal tide of large range typical in the world But as happens at war, it was a delta which started transforming to an estuary Compared to today, many natural factors in estuarine area then similar, but there are also factors that have changed much From three groups the most basic factors relating to the battle such as landform, climate and hydrology, the climate factors have changed at least, and the landform factors have changed the most In addition, there also were many changes in the wild nature of tropical rainforest and mangrove ecosystems.
The natural factors in the battlefield in 1288, were fully used and contributed to an excellent victory in the war However, military power and relationships overcome the randomness and irregularity of the natural conditions are determinants of the victorious battle.
Resume
Le champ de bataille 1288 est situe au centre
NGHIEN CUll THAD 001
D~c tru'n9cd ban ve dieu ki,n t~ nhien vung chien truang B,ch Dang nam 1288
THE BASIC FEATURES OF THE NATURAL CONDITIONS
OF THE BACH DANG BATTLE IN 1288
~UAIH!ft 1"9"' !(i)!(i) So 203+204- Thang 1+2/2020 61
T6mtat
Chien tnronq 1288 narn tal khu trung tam cua vunq ora song Bach Dang Hien nay, vunq ora song nay nay co cau true vunq ora song hlnh pheu (estuary) - mot vunq cua song hlnh pheu nhiet dai qio rnua co thuy trieu nh~t trieu bien d9 Ian dien
hlnh cua the giai Nhunq khi xay ra chien tran, vunq cua song nay co cau true chau tho (delta) va
bat dau chuyen dich sang qua trlnh hlnh pheu hoa.$0vai nqay nay, nhleu yeu to W nhien d vunq ora song khi ay tl1<1ng W, nhunq cung co nhung yetJto da thay doi nhieu Trong ba nhom yeu to C<1 ban nhat co lien quan la dia hlnh, khi hau va thuy
van thl cac yeu to khl hau da It thay doi nhat va yeu
to dia hlnh da thay doi nhieu nhat Nqoai ra, tlnh chat hoang S<1 cua cac h~ sinh thai rung rnua nhi~t dai va he sinh thai rung ng~p man cunq da co nhieu thay doi.
Cac yeu to W nhien tal vunq chien tnronq
1288 da diroc su dunq triet de va da gap p'han tao nen thang Iqi hoan my cua tran danh, Tuy nhien, sue manh quan suva tucnq quan hrc 111qngvuot qua cac yeu to ngau nhlen va bat thuonq cua dieu kien W nhien mot la yeu to quyet dinh thang Iqi cua chien tran.
Trang 4de I'estuaire de Bach Dang De nos jours, c'est un
avec une maree requliere diurne de grande
humides et des mangroves
de la bataille
MO£)AU
va Thanh phd Hai Phonq Khu vvc ta nqan chu yeu
thuoc aia phan Thi xa Quang Yen, mot phan lien
quan aen thanh phd Uong Bf va Huyen Hoanh Bo
(Quang Ninh); khu vue huu nqan chu yeu thuoc ve
thanh cua Thanh pho Hai Phonq De lam nen chien
thang lay lung, chac chan cha ong ta phai tlrn hieu
va aa narn r6 a~c aiem tu nhien vunq chien tnronq
nay De hieu ro ve quy mo va dien bien tran danh,
chunq ta cGng can nqhien cuu hoan canh tunhien
nang thay aoi qua thoi gian hen bay the kY
I BAN CHAT cAU TRUC vA TIEN H6A
VONGCaASONGB~CHaANG
1 Vjtri
chay ven Phu Long - eat Hai - Do San va ria nqoai
aai bo ngam ora song ai thee auong aang sau 6m
tU rnui Do San aen tay nam aao eat Ba [9]
thanh 4 vunq: M6ng Cai -Do San; Do San - Lach
[8]
ves Bach Dang thuoc vunq ven bo M6ng Cai
tay nam ban dao Do San Tren 250km bo bien ke
2 Cautruc
ves Bach Dang c6 ban chat cau true la mot Estuary [7, 9] - vunq ora song hlnh pheu [6, 15] N6
diroc hlnh thanh tren co Sd Wang tac giua qua trlnh phat trien cua mot graben danq sut chlrn vai
boi tfch va thuy trieu c6 bien aQ Ian N6 auqc dinh
dong boi tfch tong hop doc be huang ve phfa tay nam ves Bach Dang la mQt vue c6 cau true mra kin, noi thuy trieu la yeu to aQng luc nqoai sinh uu
tfch D6 la mot vue ruroc lo-man, hoa tron ruroc
boi tfch song tham gia aang ke nhunq dong boi
xarn thuc, Day la tnronq hop aien hlnh tren the giai ve mot ora song hlnh pheu nhlet aai [4] phat trien trong aieu kien nhat trleu bien aQlan [9]
eau true nua kfn cua ves va su phan each tuonq aoi cua n6 vai bien la nho quan aao eat Ba
62 ss 203+204 - Thang 1+2/2020 ~uan<!~nhl TI{· !(!)!(!)
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NGHIEN cuu - TRAG £)01
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a phia tay,ves thong vai bien a phia nam va phan
nronq doi co cau true mra kin khi bien tien chan
gom nhleu kieu, danq co nquon goc khac nhau va
thap, dong bang khonq ng~p trieu, dong bang
trong de bien hoac b] san lap, hien khonq con chiu
thap: 12,38%; f)ong bang: 13,89%; f)e cat vathem cat: 0,72%; Vung dam lay bien: 32,62%; Bai (boi)
cac bai trieu lay ram rap thuc vat ng~p man tu
Hinh 1.Vung cua song Bach Dang (anh v~ tinh Spot ngay01/3/2008)
nhien, he lach trieu, kenh trieu day d~c,cacdoi cat
3.Tienhoa
Qua trlnh hlnh thanh va tien hoa cua ves
giai doan nhusau [9]:
Thai kY thtJ nhat Holocen sorn - giua (11 - 3
chu dao gay nqap chlm, nhanh chong lam thay
tlch duqctang oronq, duang me ma Ian ve phla
giua
Thai kY thtJ hai:Holocen muon (3 den 0,5 - 0,7
trlnh tram tich tlch cue co anh huang den di
Giai doan 4: Moi tnronq vinh - vunq dau
Thai kY thtJ ba:Cuoi Holocen muon (khoanq 0,5 - 0,7 nghln narn qua), chi gom mot giai doan dang tiep tuc voi mot dot bien Ian moi, duang be
di chuyen ve phia luc dia, ng~p chlrn khonq den
bu tram tich va thuy trieu co vai tro quan tronq
1-~uAn ~S1nlslT9' - !(!)!(!) So 203+204 - Thang 1 +2/2020 63
Trang 61,5mm/nam trrong the kY qua Do phu sa song it,
lang donq tram tfch Ng~p chlrn khonq den bu do
thleu hut bdi tlch xay ra da hlnh thanh VCS hlnh
pheu nhu hien nay
gom: 1- Khoanq 5-7 tram narn tnroc ban dao Do
ria tay nam VCS da nqan khonq cho boi tfch doc bo
tay nam di len 2- Trong qua trlnh phat trien, nhieu
rnanh dan len da tang cuang phan tan boi tfch 10
lU'ng ra kh6i VCS 4- Dong chay tong hop ven be
xuonq phfa tay nam
Bien Ian hien d9i la d~c diem co ban nhat cua
qua cua bien Ian la x6i 10 uu the so vai boi tu,
phirc t9P; muc ruroc trung blnh thirc te dang dang
truyen trieu sau vao luc dja, v.v va ca khu h¢ donq
khoanq thai gian 1957 - 1989 da duqc ghi nhan tal
II NHO'NG N~T co BAN V~ al~u KI~NTlI
NHI~N VUNG CHI~NTRlIONG B~CH DANG
NAM1288
1 Hinh thai dia hinh
Doinui
D!a hlnh doi va nui thap phan bo chu yeu 0
narn 0 vunq ria hoac xen ke danq doi aao tren nen
dong bang hoac dam lay trong vunq ora song DQ
cao doi nul phd bien 40-1 OOm, cao nhat 200m Cac
diem cao nhu Nui Deo (146m), Nqoc Son (125m),
ve quan su khi c6 chien tranh
D!a hlnh doi nul hien nay co ban diroc t90
mol truonq luc dia keo dai vac6 nhung Ian bien
5-6 nghln nam tnroc, sau do nang ha tuonq doi mot
tnroc cho den nay
Dong bang
chau tho c6 dQ cao be mat 0,5-4m Dong bang b]
5-6m t90 thanh cac dai song song voi be bien hien nay Dong bang c6 hau het dlen tfch duqc de bao nqan 10 va man Dong bang khonq dong nhat ve
thanh cac bac: Tfch t\,l song - bien tuoi Pleistocen
-bien Holocen sorn-qhra, be m~t cao 2-4m, phan bo thanh cac rnanq Ian; tfch tu song - bien, dam
0,5-1,5m, khonq b] ng~p trieu la nho c6 de bao
10-15m, tuoi Pleistocen muon Them bac II, cao 4-6m, tuoi Holocen giua Them tfch bac I, cao 3-3,5m,
m~t 5 h¢ thong de cat bien co va hien d9i cau t90 bang cat, S9n H¢ 1 cao 4-6m; H¢ 2 cao 3-3,5m; H¢
3 cao 2-2,5m; H¢ 4 cao 2,5-3m; H¢ de 5 cao 3-3,5m
Chung ft b] ng~p lut va c6 chua ruroc ngam nhat
H~thong song tach
Ba cua song chfnh ao ra bien la L9Ch Huyen, Nam Trieu, Cam - L9Ch Tray (hlnh 3) Song B9Ch Dang la phan ha luu cua h¢ thong song Thai Blnh
Nam, Thtronq, Cau va Duong sau khi hop luu 0 gan Pha L9i, each bien 90km da phan thanh hai nhanh
Blnh tiep tuc phan thanh hai nhanh la Thai Sinh va
64 So 203+204 - Thang 1+2/2020 ~uAn (!§flW T'I !(i)!(i)
Trang 7",/ /
NGHIEN (UU - TRAQ 801
~uan @6fnwT9'·~@!@ s6 203+204 - Thang 1 +2/2020 6S
hai nhanh nay hop luu va roi I~i phan luu thanh
Vung Song Bach Dang dai 42km, trung blnh
r9ng 1km, sau 8m; song Carn dai 37km, trung blnh
song Bach Dang, can c6 mot so nhanh noi ngang
nhu song Tam Bac noi Cam va tach Tray, song RU9t
ton noi song Cam voi song Bach Dang Nqoai ra,
~ oebiln •• w&
El an sOng ,.'
Hinh2.H? thOng ae cat co va aLiCingM co venM Mc8¢ [1OJ
;
/'
,/
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/
-:
(~inh B~ce¢
I
I
Hinh 3 Quan h? giC/asong 8gch Dang vai thGnh Thiing Long
trong h? thOng thuy ago aong bOng song Hong va Ian cgn [1]
'
Huonq do ra vlnh H~ Long va Ganh Sy do ra cua
l.ach Huyen, Long cac song Ganh Sy,Blnh Hironq,
Vungtrieu cuasong
VCS c6 cau true nua kin, thuy trieu la d9n9 luc
lay ram rap thuc v~t ng~p man tl,( nhien, h$ lach
nam doc yen bo cac luong sau r9ng la nhCtng danq
dam lay bien tuoi Hollocen giCta muon, cao 0,5 -l,5m va tuoi Holocen muon cao 0-1 ,Om Nhieu nol, dl10i be m~t cac dam lay su vet g~p rat nhieu di
Phla nqoai vunq cua song la vung bien nong yen bo, c6 d9 sau khoanq 5 - 6m den 25 - 30m nam trang pharn vi tac d9n9 ro cua s6ng den day bien
va la vunq dong bang day bien tfch tu - bao man dl10i tac dunq cua dong hai luu yen bo [11]
2 Khih,u
vii
IDZ~,m.0.w.G,~.B.Q
J.ViI 2.8,1,3 O,i'"(dl, 4.861 lay ,d '1ft, 5.Xhu ~m ,"~di,6 DdinI'Jw6r.
1.Kltu (hin cv.,.w;,.'_ eUDft$ om /tJld,;-, r,J-itliir,vlf_"",c.ipI4thlrUU.
Hinh4.H? thong tach trieu (jVCSBach Dang
Trang 8hucnq thinh hanh dong va dong nam, thuonq c6
bao va ap thap nhlet dai vai tee de;>gi6 cue dal dat
35 - 50m/s Mua dong trunq vao rnua gi6 dong bik
vai cac hvang thinh hanh la bac, dong bac, Gi6
huonq dong uu the trong cac thanq 12-4,tee de;>
trung blnh 5,4 - 5,9m/s; gi6 dong nam va nam uu
the vao cac thanq 5 - 8, trung blnh 5,5 - 6m/s vagi6
bac va dong bac uu the vao thanq 9 - 11, trung
blnh 5,6-6,3m/s
Moi thanq rnua dong c6 3 - 4 dot, c6 khi 5 - 6
dot gi6 rnua dong bac,moi dot keo dai 3 - 5nqay,
sire gi6 rat rnanh nhieu khi dat den cap 7,8 Gi6
rnua dong bac kern thee gia lanh, rnua phun,
Hang narn c6 24 nqay mira phun va 15 - 20 nqay
sironq rnu, Mva phun vao thanq 12 - 4,nhieu nhat
vao cac thanq 2, 3, gay am vat, nhieu khi kern
thee lanh buot. Svong rnu chu yeu vao rnua
dong, khoanq thanq 11-4, c6 khi keo dai den
thanq 6, mat de;>cao nr 5-8 gia sang va canq ra
khoi, so nqay suonq rnu canq tang, lam tam nhln
rat thap, c6 khi chi vai met, gay nhieu tra nqai cho
qiao thonq.
Che de;>gi6 anh hvang rat Ian den cac v~t the troi, Tal VCS, quanh narn gi6 hvang D va OON chlern uu the (hlnh 5va6) D~c biettronq mua kho
(rnua Dong), cac hvang nay canq chiern uu the (tong tan xuat chiern 42,35%) va phan bo a cac khoanq toc de;>gi6 cao Trong khi do, cac hvang gi6 lien quan den hvang Tay (T, TIB vaTB) chiern tan xuat rat nho, chi 3,26% va thuonq phan bo a
khoanq toc de;>gi6 nho (bang 1) Nhv v~y, ve rnua dong, cac v~t the troi chu yeu troi tuphfa ba£)ong sang phia botay sonq Bc;lchDang
l.uonq rnua khoanq 1500 - 1800mm/nam, vai
120nqay c6 mua trong narn Mua mua trunq rnua
he n6ng, thanq 5-10, chiem 80 - 90% hronq mua ca narn va nhleu nhat vao cac thanq 7, 8 va 9 Mua
kho tuthanq 9 den thanq 4 narn sau, co ban trunq
rnua lanh Thanq 12 va thanq 1mua ft nhat, chu
yeu la rnua phun.
Bang 1 Tan suat van toe gi6 va cac huang trong mua kh6 (thanq 12-3) tal Hon Dau (1960-2011) [13]
1.0 - 2.0 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 5.0- 6.0 6.0 - 7.0 >= 7.0 (%)
Tong so(%) 13.19 21.58 7.28 19.03 5.99 10.82 18.15 96.04
Tan5uat I~ng gio (%) ." 3.96
66 So 203+204 - Thang , +2/2020 ~ujn <!Sln5i TI[· !(!)~(!)
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24%
18%
•
~
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_ """'<i'
- - '""
" -
WIND SPEED (mls)
1.0- 20
Calms: 16.56%
SOUTH
Hinh5.Hoa gi6 trong nhieu nom (1960-2011) to! Hon Dau [13J
NORTH '.
45%
WEST:
WIND SPEED (mls)
1.0· 2.0 Calm.: 3.96%
,
' • _ _SOUTH·
Hinh 6 Hoa gi6 trung binh nhieu nom vao mua khO (1960-2011) tai Hem Dau [13J
3 Thuyvan
a Thuyvan song
Vung co ba ora song chlnh do ra bien la Lc;1Ch Huyen, Nam Trieu, L9ChTray va co bon song chfnh
la Song Yen L~p (nay thanh h6 chua), song B9Ch Dang (dai 42km, trung blnh rQng 1km, sau 8m);
Song Cam (dai 37km, trung blnh rQng 400n:', sau 7m) va Song L9ChTray (dai 43km, trung blnh rQng 120m, sau 4m).
Hang narn cac song do ra bien khoanq 14 krn' ruroc va 5 trieu tan bun cat chu yeu qua clia Nam Trieu Trong do, song Cam co luu hJqng Ion
nhat trong vunq, moi narn do ra bien 1 °- 11 km'
va gan 4 trieu tan bun cat, song L9Ch Tray 1,5 krn' nuoc va khoanq 1 trieu tan bun cat, song Da Bach khoanq 1 km' ruroc moi narn Trong rnua rnua 10 (thanq 6 - 10), tai Ivqng ruroc chiem 75 - 85% va tai luonq bun cat chlern 90 - 95% tong Ivqng ca narn VCS B9ChDang la mot vue nuoc Iq m~n co dQ man thay doi trong khoanq 0,5-32%0 (0,5-25%0 ve rnua mua, 0,5-32%0 ve rnua kho) DQ man 0,5-20%0 d~c trunq cho khu clia Carn - Nam Trieu DQ man 10-23%0 d~c trvng cho khu L9Ch Huy~n-Yen L~p.
b 56ngbien
Do cau true rura kin, song bien noi chung khonq lon, tnr nhung dip bao, tan xuat I~ng song d9t 20 - 21% DQ cao song Ion nhat 2 - 3m, song bao dat 4 - 5m, cue d9i 5,6m Vao rnua dong, khoanq thanq 9 - thanq song co dQ cao trung blnh 0,5 - 0,75m, thinh hanh hVang dong vai tan xuat 34% va dong b~k vai tan xuat 14% Vao rnua he, W
thanq 3 den thanq 8, song co dQ cao trung blnh 0,7 - 0,9m, thinh hanh hvang dong nam vai tan xuat 27% va hVang nam vai tan xuat 22% vso cac thanq chuyen tiep 4 va 10, song hvang dong va dong nam VUthe, dQ cao trung blnh 0,75m.
c Thuy trieu va muc nuac
Thuy trieu kieu nhat trieu deu dien hlnh (hlnh 7) vai hau het so nqay trong thanq la nhat trieu Trong mot pha trieu 25 gia co mQt Ian ruroc Ion va mQt Ian nuoc rong Trong mot thanq m~t trang co hai kY nuoc cvang, moi kY 11 - 13 ngay, dQ Ion trieu dao dQng 2,6 - 3,6m va hai kY ruroc kern, xen ke, moi kY 3 - 4 nqay co dQ Ion trieu 0,5 - 1,Om Mua he, trieu manh vao cac thanq 5, 6, 7, yeu vao cac thanq
8, 9 va thvang dang cao vao buoi chieu Mua dong, trieu rnanh vao cac thanq 10, 11, 12, yeu vao cac thanq 3, 4 va thvang dang cao vao buol sang.
DQ Ion thuy trieu thuoc 109i Ion CJ nuoc ta, trung blnh 3,Om, cue dai 4, 18m, cue tieu 1,75m.
Mvc nuoc trung blnh tren cac song so vai muc bien thap nhat tai Hon Dau khoanq 210-256
cm, co the vuot 4,5m khi co 10.Anh hVCJng thuy trieu tren cac song rat lon, chi phdi rnuc nuoc-dong chay va truyen m~n sau vao luc dja Song trieu truyen sau den t~n Pha L9i, each bien 90km
va bieu hi~n den t~n Phu L9ng Thuonq, each bien
~ujo eMflWrs- !(!)!(!) So 203+204- Thang 1+2/2020 67
Trang 104
-. -. -. -3.5 - - - - - - - -
f2~+H:H -IH~~HfHlR~:jA~:::::;:~} - -: - :\:~~:~f:
-i1~ : ft:::::!J _ :: _ :~:~:::~t _
0.5 - - - - - - - -
-O~~~-~~~~~~ -~~~ ~~~~i ~i a
5 ~ ~ ~ ~ ~ ~ 5 ~ ~ ~ ~ ~ ~ ~ 5
o ~ ~ 0 ~ ~ 0 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 2
~ ~ 00 ~ 0 00 ~ 0 00 ~ 0 00 ~ 0 00 ~ 0 00 ~
ThO; gian
Hinh 7.Dao Q¢ng mt/c nuac tat Hon Dau thOng 1/2007 [3]
TQiHon Dau:
Ml,fe trieu cuedai 4,Om
Ml,fe trieu eao nuoc eLJ'dng 3,6m
Ml,fe trieu eao nuoc kern 2,4m
Ml,fe trieu trung blnh l,86m
Ml,fe trieu thap nuoc kern l,lm
Ml,fe trieu thap ruroc eLJ'dng O,4m
Ml,fe trieu thap nhat O,Om
140km Tuy nhien, giai han truyen man 1°/00chi
den Ben Trieu, each bien 48km TUC1ngquan thai
gian chay len va xuong tren song Da Bach - Bach
Dang la 9-10 gia/16 - 15gia VaG rnua he; 11 -
12/13-14giavao mua oong;tren song Carn la 12/13 giaa
ca hai rnua Toe 0(> dong a ora song mua kho
trung blnh 10-15cm/s, hiem khi vuot 50em/s va bi .
dong trieu Ian at.Vaonqay lu, dong chay song lon,
thuonq tren 1OOem/s, dat tai l,8-2,5m/s, Ian at
dong trleu va chay xuonq chiem hau het thai gian
trong nqay,
d. Dongchdy
Dong chay e6 thanh phan dong nhat trieu
quyet dlnh, nen e6 tfnh thuan nqhich trong ngay,
phu thuoc VaG o!a hlnh bo, huang bo, lu6ng lach
vaora song [2] Dong chay rnanh VaG cac thanq 6,
7, 12, 1, yeu VaG cac thanq 3,4,8, 9 va rnanh nhat
khi rnuc nuoc dao o(>ng len - xuonq ngang qua
rnuc trieu trung blnh, Toe 0(> dong trong khoanq
rat r(>ng W O,l-l,8m/s, trung blnh 10-30cm/s Tai
ora Nam Trieu, tee 0(> dong chay xuonq cue o~i
90em/s va chay len cue dai 60cm/s Phfa nqoai
VCS, dong chay trieu yeu dl va vai tro dong chay
mua the hien r6 rang Mua he, dong chay huang
oong bac toe 0(> 10 -15em/s, rnua oong dong chay
huang tay nam, toe 0(> 20 - 30em/s
Hinh 8.Mo hinh dong chay (Delf-3D) song Bacb f)ang
taitang m¢t giiJa pha trieuxu6ng mua f)ong
(kynuac cuonq 7h, 201312009) [14]
cHunks
Tj", ~
~ ,., R·' a.a n·" ••
I-._ ,,·a a·, a·"
Hinh9.Hoa dong chay tht/c ao tang giila tramBR1(BenRUng)
VGOmuaDong (thong 01/ 2007) [5]
Che 0(> dong chay ruroc m~t khu vl,le Ben Rung ouqctfnh cho rnua kho (01/2007 va 3/2009)
va mua rnua (6/2007 va 8/2009): Toe 0(> dong chay trong rnua rnua e6 xu the chung Ian gap 2-3 Ian rnua kho, tharn chf oen 5 Ian tal khu vl,le song Ru(>t Lon khi trieu xuonq [5, 14] Mua kho, toe 0(> dong chay e6 gia tr] trung blnh 20 - 35 em/s, gia tr] cue dai e6 the dat 80 em/s, huang dong chay thee true long dan Thai gian chay xuonq chlern 60 - 70%, toe 0(> dong chay xuonq eung qiarn han Toe 0(> dong chay hau het tal cac khu vue hon nhau khonq oang ke, phfa khu vue thuonq luu cua song Bach Bang e6 gia tr] Ian nhat, Khu vl,le phfa ha luu dong chay xuonq e6 huang NTN va dong chay len e6 hLJ'ang nquoc Iai.Vaornua kho, tal khu vue phan luu ora song Chanh, do dong chay ooi huang nen
68 So 203+204- Thang 1+2/2020 ¥U enl'f- !(i)!(i)