ji^nsMisi
NGHIEN CUtJ DANH GIA KHA NANG NGUON Nl/^C NGQT SONG HAU PHUC VU CAP NU'6c CHO VUNG
SAN XUAT TOM - LUA T I N H BAC LIEU
Nguyen Dinh Vugng, Huynh Ngpc Tuyen, Le Van Thinh Vien Khoa hpc Thiiy Ipi miin Nam Nguyen Quang Phi Trudng Dgi hpc Thuy lai Tom tat: Md hinh trdng lua trin nin ddt nudi tom, gpi tdt la md hinh Tom - Liia dang duac coi la logi hinh sdn xudt ben vicng d Bgc Lieu ndi rieng vd viing DBSCL ndi chung. Trong do ngudn nuac ngpt cdp cho viee rira man de trong lua Id vdn de hit sue quan trpng, gdp phdn quyet dinh den ndng sudt vd chdt lupng ciia vu liia. Tuy nhien, ngudn nude ngpt de rica man cho cdc viing ndy ngodi nude mua (nude trai), cdn phdi phu thupc vdo ngudn nude mat tic song Hdu. Trong khudn khd cua nghien cicu nay nhdm tdc gid budc ddu ddnh gid khd ndng cdp ngpt tie sdng Hgu cho viing sdn xudt Tom - Liia tinh Bgc Liiu thdng qua kit qud md phdng bdi todn thdnh phdn ngudn nude xet d trudng hpp hien trgng vd khi da xdy dung cdng Cdi Lan, Cdi Be.
TU khda: Nguon nude ngpt song Hau, he thong thuy lai, torn-Ida, Bac Lieu
Summaty: The model of rice cultivation on shrimp cultured land, called the Rice-Shrimp farming model, is considered as a sustainable production model on the Bac Lieu province in particular and Mekong River Delta provinces in general. In this, the freshwater supply for salt washing for rice cultivation is very important, contributing to the productivity and quality of the rice crop. However, the source of freshwater for salt washing of these areas in addition to rainwater, also depends on surface water fl-om the Hau River. In this study, the authors initially assessed the ability to supply freshwater fi-om the Hau River for the production Rice-Shrimp farming region in Bac Lieu province through the simulation of the water resource composition in
the present case and after sewers Cai Lon, Cai Be were built case.
Keywords: freshwater source of Hau River, irrigation system, Rice-Shrimp, Bac Lieu.
1. DAT VAN DE vugt trdi ban hdn so vdi trdng Iiia truyen r. T •" 1. ,.' u j ' _ , *u' 1 - A-!^ *i^u „ „ A ; thdng. Thuc t l eho thdy, md hinh Tdm - Liia Bac Lieu la tmh dung thu 3 ve dien tich nuoi ° •_ , , . , x , , . , . ,
^-' 1 i^ 1. * - 1' ' rv- u- oA„„ r-.v,, tuy dat hieu qua kinh te, nhimg lai bi phu tom ket hap trong lua a Dong bang song Cuu ^ • • ,., , „ , , ' f, T -n.''- • A-'^ tf^v, oA„ ^„it TAm thupc vao tu nhien. Vimg eanh tac Tom - Lua Long. Thoi gian qua, dien tich san xuat Tom - ^. , , ' , „ ^.T -,\ ,s. i , x.
T ' \. • T, T-- *= -* t. I, +.-. « o<:i I,™ tren dia ban tmh Bac Lieu hau het nam a cuoi Lua tai Bac Lieu tdng rat nhanh, tu 5.851 ha , • ^ ; , A ,, . *x -.
- ^ n i / i - A^ - -(/innni, - « , i n i / : uguon uuoc ugot ucu sau xuat luu tren dat nuoi nam 2011 len den gan 30.000 ha nam 2016. ^ , , ^ f' . x , « ~ TT«L.Li.' - w *-- - .****_" !.'.„ „t,„ tom chu yeu dua vao nguon nuac mua va mpt Hinh thuc nuoi tom tren nen dat trong lua cho / ' , . „ .
^4.1.' I. " inn ,inni.„/u„ ™™«U4 phan nuoc ngottu song Hau.
nang suat bmh quan 300 - 400 kg/ha, mang lgi ^ s>. a .
lgi nhugn khoang 50 - 60 trieu ddng/ha/nam, Cd thi ndi ngudn nude ngpt ddng vai trd rat quan trgng cho md hinh Tdm - Liia, tuy nhien thuc t l hiSn nay hdu hit eac dia phuang trong Ngay nhan bai: 20/6/2017 ^^ V ^x ' , , . . ,. - , - , a«
Ngay thdng qua phan bien: 24/8/2017 ^"^ ^^^ P ^ ^ P^^ ^^-^^ ™° ^^°"= «^«^ "^^
Ngay duyet dang: 26/9/2017 khong chii ddng duge ngudn nude nggt trong
TAP CHf KHOA HQC VA CONG NGHE T H O Y L Q I Sd 40 - 2017 41
KHOA HOC
sdn xudt. Mdt vdn de dang rat dugc quan tdm do la ngoai nude mua thi ngudn nude ngpt tren sdng Hgu cd khd ndng cdp de rtra mgn eho vimg trdng liia tr6n ddt nudi tdm cua tinh Bgc LiSu hay khdng vd pham vi dugc den ddu?
Trong khudn khd nghiSn ciiu nay, ehiing tdi budc dau danh gid kha nang cap ngpt tCr sdng Hdu cho tinh Bgc Lieu thdng qua tinh toan thanh phan nude ngpt, dp dyng ly thuyet lan truyin cdc thdnh phdn ngudn nude kit hpp vdi md hinh thiiy ddng lye I chieu (Mike11) nhdm lam rd phan b6 ngudn nude ngpt tren kenh rach d Bgc Lieu, day la ca sd dl xudt cdc thdi diem bd sung ngu6n nude ngpt tu sdng Hdu cho cac vung san xudt Tdm - Liia cda tinh.
Nghien curu nay ke thica vd phat triSn phuong phdp lugn tinh toan md phdng sy lan truyen cae thanh p h ^ ngudn nude, trong dd cd thanh phdn nude ngpt (tir sdng Hdu) ciia d l tdi [4] va [5]. Bai toan dupe phan tfeh tren 2 kieh ban tinh toan nhdm lam rS su thay ddi ngudn ngpt trong dieu kien hien trang khi chua xdy dung cdng Cdi Ldn, Cai Be va trudng hgp da xay dyng hp thdng cdng Cai Ldn, Cdi Be kilm sodt man bien Tdy.
2. PHirONG PHAP NGHIEN CUtJ Cdc phuang phap chinh sg dugc six dyng trong nghien ciiu ndy nhu sau :
Phuang phap ke thua: Kl thira cdc tdi lipu, sd lieu v l ngudn nude, dac dilm khi tugng thuy van,... tir ket qua nghien eiiu eiia eac d l tai, dy dn da thyc hipn vung Bdn ddo Cd Mau vd tren dia ban tinh Bac LiSu;
Phuang phdp dieu tra, thu thdp t6ng hgp tdi lieu: Trong qud trinh nghien ciin dd tiln hanh dieu tra, thu thap cdc tai lieu v l dia hinh, ngudn nude, khi tugng thuy van, ddng chay,...
phyc vy cdng tac tinh toan ngudn nude nggt;
Phuang phdp md hinh todn: Ap dyng \^
thuyet lan truyen ede thdnh phdn ngudn nude kit hgp vdi phdn mIm thuy lyc 1 chilu (MIKE 11) de tinh todn lan truyin nguon nydc ngpt tir sdng Hdu vl vimg nghien ciiu [I],[2],[3];
LTng dyng hp thdng tin dia ly (GIS) va ede phdn mem chuyen nganh d l h? thdng hod va sd hod bdn dd, cae dG Ii§u va kit qua tinh toan ngudn nude ngpt.
3. KET QUANGHIEN CtHU VATHAO L U ^ 3.1. Hien tr^ng md hinh san xuat Tom - Lua if Bac Li€u
Md hinh Tdm - Liia cua tinh Bac LiSu da ed tit han 30 nam nay nhung phdt trien kha manh tii nam 2011 vdi 5.851 ha. Dien tich da tdng nhanh qua cac nam vd hien nay tgp tnmg chii ylu d cdc huy^n Hdng Dan, Phudc Long, Gid Rai vd VTnh Lgi.
Theo thdng ke cua Sd Ndng nghiep vd PTNT tinh Bac LiSu [6]: Nam 2016, kS hogch san xudt liia tren dat nudi tdm ban dau 29.457 ha, dien tich thyc t l cho thu hoach Id 31.328 ha, dat 106,35% k l hogch; Trong dd: Dien tich san xuat cua cac huyen, thi xa: Vinh Lgi 101 ha, Phudc Long 9.045 ha, Hdng Ddn 21.617 ha vd Thi xa Gia Rai 565 ha, lgi nhudn bhih quan 10.072.000 ddng/ha, dgt 66,6 % so vdi ddu tu.
K I hoach md rpng dien tich Iiia tren ddt nudi tdm nam 2016 la 3.835 ha, thyc hi$n 2.603 ha, trong do: Cac huypn Hong Dan k l hogch 1.500 ha, thyc h i | n 1.500 ha dgt 100% kl hoach; Phudc Long k l hoach 719 ha, thyc hien 437 ha dgt 60,78% k l hogch; Thi xd Gid Rai k l hogch 1.453 ha, thyc hi^n 565 ha dat 38,89% k l hogch; Vinh Lgi k l hoach 163 ha, thyc hi^n 101 ha dgt 61,96%. Trong nam 2017, dir kiln k l hogeh md rpng dien tich Ilia trSn ddt tdm la 1.270 ha trong do huyen VTnh Lgi 99 ha, Phudc Long 283 ha vd thj xa Gia Rai 888 ha.
Md hinh san xudt liia tren nen ddt nudi tdm dugc xem la md hinh khd ben vflng, bdi ngoai viee ty tiie duge luong thyc tgi cho thi cay liia cdn cd kha ndng cai tgo mdi trudng rat hieu qua, cd thi hdp thu cae chdt dpc hgi vd each ly mdm benh cho vu tdm nudi ke tilp, nhung phe
42 TAP CHf KHOA HOC VA C O N G N G H E T H C I Y LQI S(3 40 - 2017
I KHOA HOC ^ . J . U I c U K I ! ! ^ phdm eua cay lua (rom, rg...) khi phdn buy se
tao thanh ngudn thuc dn ty nhien giup cho tdm phat trien tot, vi thi trong lUa tren ddt nudi tdm la rat cdn thiet va cd hi^u qud cao cho cdc vy nudi tdm d Bgc Lieu. Ngoai ra, khau rua man
Bang 1: Cac kieh ban tinh toan
dS canh tac liia tren vung nudi tdm ciing gdp phdn hgn che qua trinh man hda, keo dai tudi thp sir dung ddt.
3.2. K{ch ban tinh toan mo phdng
K i e h b a n
KBl BCB2
D a c d i S m ciia kjch b a n H j ting thuy loi (PA)
PAl=Hi$n trang 2013 PA2 = PAl + c6ng Cai Lcm, Cm Be
Nhu cau nuac Hien trang 2013 Hien trang 2013
Bieu kien bien Nam 2005 Nam 2005
33. Ket qua tinh toan md phdng lan truyin thanh phdn nude mat ngpt (bilu thi theo ty le %) nguon nuo^c ngpt tir sdng Hgu den tinh Bac LiSu duge thi hien tir Kit qudtinhtoanmdphdngkhanang Ian truyin Bang2dlnBang5 vdtirHmh I dInHinh 10.
Bang 2: Phan bo ty IS thanh phan nude ngpt song Hau ldn nhat thang 4
TT 1 2 3 4 5 6 7 8
Thanh phan nvo'c ng9t(%)
0 0-5 5-10 10-20 20-40 40-60 60-80 80-100 Tong
Ty 1$ phan tram so vol dien tich (%) KBl
14,59 24,93 7,51 7,13 7,32 5,43 7,20 25,89 100,00
KB2 11,64 23,20 9,69 9,25 9,61 6,32 4,89 25,39 100,00
Ket qua tmh toan lan truySn nguon nude ngpt thang 4 cho thdy: Trong trudng hgp diSu ki^n bien la nam 2005, khi chua xdy dyng cdng Cdi Ldn, Cai Be thi ty lp % nguon nude ngpt ldn ban 40% tu sdng H^u vl tinh Bgc Lieu chilm
45% di§n tich todn tinh. Khi da xdy dyng cdng Cai Ldn, Cai Be thi ty le % ngudn nude ngpt ldn ban 40% tir sdng Hgu vl tinh Bgc Lieu ciing chi chiSm 46% dien tich toan tinh, xem Hinhl.
TAP CHf KHOA HQC VA C O N G N G H E T H O Y L O I S(3 40 - 2017 43
I KHOA HOC ^^EBBBBII^B
MA FH^NG THANH FRJN NUOc NGQT LON NRXT THANG 4 <*) Ttr SflNG H^U D£N TtNH B4C LlGU
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Hinh 15: Phdn bd ty le thdnh phdn nude ngpt song Hdu ldn nhdt thdng 4
- D o man nho nhal thang 4 tren kenh QL_PH (dSu k6nh HuygnSu3)25,7gfl.
Hinh 16: Dien bien dp man tren kenh Qudn Lp-Phmg Hiep (ddu kenh Ldng Trdm) thdng 4- KBl
- DQ man nho nhat th^ng 4 iren kenh QL_PH (dau kenh QL_GR)25^B/I.
Hinh 17: Diin bien dp man tren kenh Qudn Lp-Phung Hiep (Mu kenh Qudn Lp-Gid Rai) thdng 4 - KBl
44 TAP CHfKHOAHpCVAcONGNGHe-mClYLOl 5(540-2017
I KHOA HOC ^ J . 1 ! M ; M ! I ^ Bang 3: Phdn bo ty le thanh ph^n nud'c ngot sdng Hdu ldn nhdt thdng 5
TT
1 2 3 4 5 6 7 8
Thanh ph4n nuo^c ngyt (%)
0 0-5 5-10 10-20 20-40 40-60 60-80 80-100 TBng
Ty If phan tram so vol diSn tich (%) KBl
11,69 23,14 9,61 9,22 9,59 6,43 4,93 25,39 100,00
KB2 11,57 23,28 9,68 9,25 9,65 6,33 4,86 25,39 100,00
Ket qua tinh todn lan truyen ngudn nude ngpt thang 5 cho thdy: Trong trudng hgp dieu kien biSn la nam 2005, khi chua xay dung cdng Cai Ldn, Cai Be thi ty le % nguon nude ngpt ldn ban 40% tir sdng Hdu dSn tinh Bac Lieu
chiem 46% dien tich todn tinh. Khi da xdy dyng cdng Cai Ldn, Cdi Be thi % ngudn nude ngpt Idn hon 40% tir sdng Hdu din tinh Bac Lieu cung chi chiem 46,5% dien tich toan tinh, xem Hmh 4.
M O PHONG THANH PHAN NUOc NGOT LON NHAT THANG S1%) Tt'SONG H4L' D£N TiNH BAC Ut\l
KICK BAN 1 ;
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Hinh 18: Phdn bd ty le thdnh phdn nude ngpt song Hgu ldn nhdt thdng 5
TAP C H [ K H O A HOC VA C O N G N G H E T H O Y L p l SO 4 0 - 2017 45
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Hinh 20: Diin biin dp man tren kenh Qudn Ld-Phung Hiep (dau kenh Qudn Lp-Gid Rai) thdng 5 - KBl
Bang 4: Phan b^ ty IS thanh phan nirorc ngpt sdng Hau ldn nhat thang 6 TT
1 2 3 . 4
5 6 7 8
Th^nh phan nu-o^c ng9t(%)
0 0-5 5-10 10-20 20-40 40-60 60-80 80-100 Tong
Ty If phan tram so vol di@n tich (%) KBl
20,94 18,02 8,02 8,93 11,55 9,71 20,47
2,36 100,00
KB2 20,51 18,11 8,06 8,97 11,30 9,61 20,53 2,91 100,00 Ket qua tinh toan lan truyen ngudn nude ngpt chiem 44% dien tich toan tinh. Khi da xdy thang 6 cho thdy: Trong trudng hgp dilu kien dyng cdng Cdi Ldn, Cai Be thi % ngudn nude bien la ndm 2005, khi chua xay dung cdng ngpt ldn ban 40% tu sdng Hau den tmh Bac Cai Ldn, Cai Be thi % ngudn nude ngpt ldn Lieu ciing chi chilm 44,6% dien tich toan han 40% tir sdng Hau dSn tinh Bac Lieu tinh, xem Hinh 7.
46 TAP CHf KHOA HOC VA C O N G NGHe -mOv LOI S6 40 - 2017
I KHOA HOC ^ K t M J t c U l e m ^ g
M 6 PHflNG T H A N H P H A N NlTOC NGQT LliN N H X T T H A N G H%) TV S O N G H A U 0 ( ! N TtPffl BAC LifeU
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Hinh 21: Phdn bd ty le thdnh phdn nude ngpt sdng Hdu ldn nhdt thdng 6
- D9 mlti nho tihac thang 6 tren kenh QLJH(it5ukenh HuyenSiiS)
18,5g/l.
Hinh 22: Diin biin dp man tren kenh Qudn Ld-Phung Hiep (ddu kinh Huyen Sic 3) -thdng 6 KBl
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Hinh 23: Dien biin dp man tren kenh Qudn Lp-Phung Hiep (ddu kenh ddu kenh Qudn Lp-Gid Rai) thdng 6 — KBl
TAP CHf KHOA HOC VA C O N G N G H E T H O Y LOI S(5 40 - 2017 47
I KHOA HOC • l A H M i M ! ! ^
Bang 5: Phdn b6 ty 1| thdnh phdn nude ngpt sdng H | u ldn nhat thdng 7 TT
1 2 3 4 5 6 7 8
Thanh ph4n nu-d'c ngot (%)
0 0-5 5-10 10-20 20-40 40-60 60-80 80-100 T6ng
Ty le ph^n tram so vol dien tich (%) KBl
1,52 8,21 5,07 9,77 11,00 15,08 15,54 33,80 100,00
KB2 5,07 • 6,84 5,27 9,44 9,31 11,95 13,09 39,02 100,00 Ket qua tinh toan lan truyen ngudn nude nggt
thdng 7 cho thdy: Trong trudng hgp dilu kien bien la nam 2005, khi chua xdy dung cdng Cai Ldn, Cai Be thi ty IS % ngudn nude ngpt ldn hon 40% tir sdng Hau den tinh Bgc Lieu chiem
75% dien tich todn tinh. Khi da xay dyng cdng Cai Ldn, Cai Be thi % ngudn nude ngpt ldn ban 40% tu sdng Hdu den tinh Bac LiSu ehiem 75,6% dien tich toan tinh, xem Hinh 10.
Md PH6NO TKANH PHAN NUtlC NOOT LON NHAT THAND J ( H ) Ttr SONG HAU BfH TiNH B4C LiBU
K I C H B A N I •
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Hinh 24: Phdn bd ty le thdnh phdn nude ngpt song Hdu ldn nhdt thdng 7
4. KET LUAN
Tir ket qua tinh todn tren cd the thdy rang:
trong thdi diem hien trgng kha ndng cdp ngpt cho cdc huyen sdn xudt Tdm - Lua d Hdng Ddn, Gid Rai tii ngudn nude sdng Hau se la rdt khd khdn, do dd ngudn nude d l rtta man trdng lua cho vimg nay chu ylu Id nude mua.
Vdo thang 4, thdng 5 hodn toan khdng cd kha
nang dung nude ngpt sdng Hau de rira man trdng Ilia. Tuy nhiSn vdo cudi thdng 6 (28/6- 10/7) dp man tren kenh Quan Ld-Phyng Hiep giam manh (5-8g/l) nen ed the dung nude tren kenh de pha loang nude man trong vudng tdm (rita giai doan ddu). Tir giiia thang 7 den thang 8 hodn todn cd thS dung nude ngpt tu sdng Hdu qua cdc he thdng kenh Quan Lg - Gia Rai, kenh Phd Sinh, Phd Sinh 2 de rua man d giai
48 TAP CHf KHOA HOC VA C O N G N G H E -mOV LOI S6 40 - 2017
I KHOA HOC • • . l . i J I J J i a ! ! ^ doan sau cho m^t so xd thu^c huy^n Phudc
Long, Hong Dan ndm dpc theo tryc kSnh Qudn LO - Phyng Hi^p, mpt so xd thupc huy^n Gid Rai (Phong Thgnh A, Phong Thgnh, mpt phdn Phong Tdn, m^t phan xd An Trgch).
Cae viing trdng lOa trSn nin dat nudi tdm ehu yen tap trung d cdc huypn: Gid Rai, Phudc Long, Hdng Dan. Thdnh phan nude ngpt tii sdng Hau v l cdc huy^n nay la khd it trir mdt sd xd thudc huy^n Phudc Long, Hdng Dan ndm dpc theo tryc kSnh Quan L0-Phyng HiSp (thanh phan nude ngpt tCr sdng H§u v l 20- 70%) nSn ed thi diing nude ngpt tren kSnh rach de nia m^n. D i i vdi huy$n Gid Rai thanh phan nude ngpt tii sdng H|lu v l eiing tuang doi thdp (ngoai trii viing ngpt hda tir xd Phong Tan dpc theo Qudc lp lA v l phia Bdc), tuy nhien eung ed mpt s6 xd cd khd ndng dimg nude mat de rita mdn nhu xd Phong Thgnh A, xd Phong Thanh vd m0t phJin xd An Trgch (thanh phdn nude ngpt tii sdng Hgu ve 10-30%).
Cdn thdy rdng vdi sy gia tdng v l diSn tich cung nhu hiSn tugng tdng vy dang phat ttiln tai nhilu
nai thudc viing ngpt cua Tp. Cdn Tho, cac tinh Hau Giang va Sdc Trdng tM ngudn nude ngpt eua sdng Hdu se cdng khd khan han trong viee mong mudn dua nguon nude nay ve phia Bgc Lieu, Cling vdi thuc trgng hp thong kSnh rgch chuyen nude hipn nay (bi bdi Idng, diu hep ddng chdy) thi Idia nang c ^ ngpt cho viing sdn xudt Tdm - Liia d Bac LiSu se ngay eang khd khan hon, ddn chiing cy the eho vdn dl ndy Id viee nude man 9-10 g/l da cd thdi diem len tdi Nga Nam tren kenh Qudn Lp - Phyng Hiep. Vi vdy mOt trong nhimg nhiSm vy quan ttpng nhdt hien nay Id ngodi viee ddy manh md rdng eac he thdng dan ngpt thudc he thdng kenh KH (kSnh ndi sdng Hgu vdi sdng Cai Ldn), can thiet phai ngo vet, md rdng true Qudn Lp - Phyng Hiep nhdm gdp phdn bao dam san xudt bipu qua va bin viing cho tinh Bgc Lieu, trong do nao vet kenh tryc vd hS thdng ndi ddng cd nhi^m vu nia mgn trdng Iiia eho diSn tich viing canh t ^ Liia - Tdm eiia tinh, nhiem vu ndy cd thS van cd gia trj ngay cd khi dd xdy dyng cdng ngan mgn Cai Ldn vd Cai Be.
TAI LB^U THAM KHAO
[I]. Nguyen An NiSn va Tdng Diic Thang (2003), "Tinh toan cae thanh phan ngudn nude - mdt cdng cu mdi da ndng phuc vu quan ly tong hgp ngudn nude va mdi trudng", Ti^in tap ket qud KHCN Vi?n Khoa hpc Thuy Ipi Miin Nam ndm 2003, TP. Hd Chi Mmh.
[2]. Tdng Diic Thdng (2002), Nghien cuu h$ thong thuy lai chiu nhiiu ngudn nude tdc ddng - Vi dyt ung d\ing cho DBSCL vd Dong Nam Bp, Ludn an Tiln si ViSn Khoa hpc Thuy lgi miln Nam, TP. Ho Chi Mmh.
[3]. Tdng Diie Thdng (2006), "Mpt vai kit qua tinh toan sy lan truyen thanh phdn nude Sdng Hau trong vimg ban dao Ca Mau", Tuyin tap kit qud KHCN Vien Khoa hpc Thuy lai Miin Nam ndm 2005, TP. H 6 Chi Minh.
[4]. Tdi^ Dlie Thdng (Chu nhi^m, 2009-2013), Di tdi Dpc lap cdp Nhd nude: Nghiin cuu gidi phdp thuy Ipri phiic vvphdt triin bin vOng viing Bdn ddo Cd Mau, Vien Khoa hpc Thiiy Lgi miln Nam, TP. H 6 Chi Mmh.
[5]. Nguyen Dinh Vugng (Chii nhipm, 2009-2012), De tai cdp Bp: Nghien cicu de xudt quy trinh rua mgn ph^ic hoi vimg ddt bj nhiem mdn do nuoi trdng thdy sdn thupc 2 tinh Bgc Lieu vd Cd Mau, Vi^n Khoa hoe Thiiy Lgi mien Nam, TP. Hd Chi Minh.
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