Tiiu ban Sinh thdi. Mdi tnrdng vd qudn ly Biin 211
ANH HirOfNG CUA DAP THUY DIEN HOA BINH
T 6 I H E SINH THAI BIEN VEN Bd DONG BANG BAC BQDoan Bo', Nguyin DiJc Cu^, Nguyin Minh Hudn' 1) Truong Dai hoc Khoa hoc Tu nhien, dhqghn, 334 Nguyin Trai, Ha Npi.
2) Vien tai nguyen vk m6i tnrcmg bienVien N&ng, H^i Phong Email: [email protected]
Tom tat
Bdi bdo ndy gidi thiiu mgt sd kit qud ddnh gia qud trinh sdn xudt vgt chdt hihi ca trong qudn xd sinh vgt bdc thdp d hi sinh thdi biin ven bd ddng bdng Bdc Bg trudc vd sau khi cd dgp thuy diin Hda Binh. Kit qud cho thdy: 1) Do viec dieu tiet nude cua ddp thuy diin Hda Binh nen lugng nude do ra biin qua 9 cira sdng cua h$ thdng cua song hinh phiu Bgch Dang vd chdu thd Sdng Hdng dd bi thay ddi ddng ke. keo theo Id su suy gidm nguon dinh dudng vo ca hoa tan (P. N.' Si) trong nude viing bien ven bd dong bdng Bdc Bg tir 33 din 47% so vdi trudc khi ed dap; 2) So vdi thdi ky trudc khi cd dap, cdc dgc trung cua qud trinh sdn xudt vdt chdt hihi ca trong qudn xa sinh vdt ndi d viing bien bi suy gidm c& 38-80% trong mua mua vd 34-70% trong mua kho.
Abstract
IMPACTS OF HOA BINH HYDROELECTRIC DAM ON COASTAL ECOSYSTEMS IN RED RIVER DELTA
This paper introduces some results of evaluation for organic matter production in plankton communities of coastal marine ecosystems in Red river delta before and after the Hoa Binh hydroelectric dam construction. The results showed:
1) Because of water regulation of Hoa Binh hydroelectric dam, the amount of water flowing into the sea through 09 estuaries and river mouths of the Bach Dang estuary system and Red river delta has been changed significantly, associated with the depletion of dissolved inorganic nutritions (P, N, Si) in Red river delta coastal waters from 33 to 47%
compared to the time before dam construction;
2) Compared with the period before dam construction, the characteristics of the organic matter production process in plankton communities in the waters has been reduced 38-80% and 34-70% in wet season and dry season, respectively.
212 Hoi nghi Khoa hpc va Cong ngh4 biin todn quoc lan thu V
M O BAU
Cho din nay, nha may thuy dipn Hoa Binh da ho?it dgng dugc tren 20 n5m, song vifc nghien cira, danh gia tac dgng ciia c6ng trinh nay (cung nhu cic cong trinh h^ chiia thugng ngudn noi chung) din tai nguyen - moi truong viing cira sdng ven biin don^ bang Bac BO con chua dugc quan tam dung mirc. Nhu dS hiit, nSng suit sinh hpc sa cap 14 khau diu tien cua qua trinh san xuit vjt chit hOu co trong thiiy vuc, cuong dp qud trinh nay phu thugc chat che vao cac diiu kien sinh thai - moi trudng, trgng dg ham lugng cac muoi dinh duong vo ca Phitpho, Nito co y nghia dac biet quan trgng [1]. Thuc t i cho thSy, ham lugng cac mudi dinh duSng hoa tan trong nuac vimg biin ven ba ddng bang_ Bac Bg cd su biin dgng khac nhau giOa miia mua va mia kho [2, 4, 5] (do lugng nuac dd ra bien trong miia mua nhiiu hem - nguySn nhan nay do tu nhien chi phoi), song mpt nguyen nhan khong kem phin quan trpng la hojt dgng diiu tiit nude ciia d jp thuy dien Hoa Binh da lam thay ddi dang ki (giam) ham lugng cac mudi dinh duong vd ca t^i vung bi6n ven bdr. Day la mgt trong nhiing nguyen nhan ca ban lam suy giam siic san xuit so cip a viing biin, keo theo la su thay ddi tit ca cac dac trung khac cua he sinh thai viing nghien ciiu.
Di cd dugc nhirng thdng tin dinh lugng vi van di nay, chiing tdi gidi thifu mgt si kit qua danh gia qua trinh san xuit v$t chat hiru ca trong quan xS sinh vat noi d he sinh thai bien ven bd ddng bing Bac Bp trudc va sau khi cd dap thiiy dien Hda Binh.
1. PHirONG PHAP VA TAI Llf U Stf DVNG 1.1. Sff b$ phu-ong phap
Trong h? sinh thai bien, cac mdi tuong tac giiia sinh vat vdi nhau va vdi moi trudng la nguyen nhSn bien ddi sd lugng ca the va sinh khdi cua cac quan the. Voi quan xa sinh vat ndi bien, mdi tuong tac (canh tranh) xay ra d hai cap dg: thii nhat, dgng v^t ndi (DVN) sir dung thirc vat ndi (TVN) lam thiic an (tua kieu "vat du-vat mdi"). Day la quan he canh tranh giiia hai quan the khac loai, trong do sinh khdi quan the DVN tang len do sii dung thiic an, sinh khdi TVN giam di do bi tieu thu; thir hai, do siic ep ciia su tang "dan sd", cac ca the bugc phai canh tranh de duy tri sd lugng d mure cdn bang, lam che mpt phan so lugng ca the hi loai khdi quan thi (di cu hoac chet) dan den sinh khdi q^uan the suy giam [6]. Day la quan he canh tranh ciing loai. Ngoai hai qua trinh tren, nhieu qua trinh khac ciing gay nen bien ddng sinh khdi quan the nhu quang hgp, dinh dudng, ho hap, chet tu nhien,... (hinh 1).
TVN K2 BVN
lA i i4 Ks
Theo nguyen ly bao toan, ddng luc hpc bien ddng sinh khoi cac quan thi TVN va DVN dugc md ta nhu sau;
dF/dt = ( K i - K o - K 4 - a F - b | K 2 Z ) F (1) Hinh 1: Cdc qua trinh dnh huong tai su clZ/dt = ( b i b a K i F - K 3 - K j - PZ)Z (2)
phdt trien qudn xa sinh vdt ndi biin trong dd F, Z - sinh khdi cua quan tbi TVN va DVN; Ko, Ki, TL, - tdc d$ rieng hd hip,
Tieu ban Sinh thdi, Mdi trudng vd qudn ly Biin 213
quang hgp va chet tir nhien cua quin the TVN; K2, K3, K5 - t6c do rieng lpc nuac liy thuc an, ho hip va chet t\r nhien cua quan thi DVN; bj - he s6 chgn lpc thuc an tir nhien cua' DVN doi voi TVN; ba - he so dong h6a; a, p - he so suy giam sinh khoi do canh tranh cung loii ciia cac quan th^ TVN, DVN. Toe dp rieng cac qua trinh sinh hoc (la t6c dp bien d6i cua mot don vi sinh khoi) phu thugc v^o cac dieu kien sinh thai - moi truong (nhu nhiet dO, cuong dp biic xa, nong dp cac muoi dinh duong,...) va dugc tinh theo cac cong thiic thuc nghiem da dugc cong b6 trong [2,3,5,7]. Cac d5c tnmg cua qua trinh san xuit vat chit hOu CO va cac hiSu suSt sinh thai dupe xac dinh theo cac cong thuc sau;
Nang suat so c i p tho (mgC/m /ngdy) Ho hap cua quan the TVN (mgC/m^/ngdy) Nang suat so cap tinh (mgC/m^/ngdy) 06ng hoa cua quan the DVN (mgC/m^/ngdy) H6 h i p cua quan the DVN (mgC/m^/ngdy) Nang suat thu cap ciia DVN (mgC/m^/ngdy) H? so P/B ngay cua quin th^ TVN Hi$u suat chuyin h6a nang lugng tu nhien H^ so P/B ngay cOa quan the DVN
Hieu suat chuyen hoa nang lugng qua 2 bac TVN-DVN
Pt = 0,4.Ki.F RF = 0,4.Ko.F Pn = P.-RF Az = 0,4.b,.F.b2.K2.Z Rz = 0,4.K3.Z Pz = A 2 - R z Hi = Pn* /(0,4.F*)
H2 = 9,375.Pn* /(IsuRF.10^60.G) H4 = Pz*/(0,4.Z*)
H5 = Pz*/P,*
Ghi chu: Tronp cac cong thiic tren. .sinh khoi F va Z tinh b i n p mp-khn/m^: cac tfic do rieng CO don vi la I/ng^y, ri6ng K2 la mVmg.ngay. He s6 0,4 cho hikx lugng C chilm 40% trpng lugng kho ciia sinh vat; cac ky hi?u co chi so (*) la gia tri tich phan cua c^c dai lugng trong cot nude thiet di?n Im^ tCr mat t6i day, 9,375 1^ s6 calo ciia 1 mgC trong san phim, IsuRF (cal/cm .phiit) la biic xa tu nhien trSn mat bien, G 1^ s6 gio nang trong ngay.
Voi muc dich nghien ciiu cac dac tnmg trung binh miia (mija mua va miia kho) cua qua trinh san xuat v^t chat h&u co trong quan xa sinh vat noi 6 viing bien ven bd dong bang Bic Bp trong cdc giai doan truoc va sau khi co dap thuy di?n Hoa Binh, h6 phuong trinh (1-2) dugc gidi bing phuang phdp Runge-Kuta toi dieu kien tiia dirng (sai so 8 = 10"'), nghi?m ban dau lay tiiy y khac 0. Cac tinh toan dugc thuc hien trung binh tren tung 6 ludi 0,1 d^kinhvy.
1.2. Tai Ueu sir dung
- Khu vuc nghien ciiu la viing biin ven bd dong bing Bic Bp (106-107,3°E; 19,8- 20,8^). Trudng d^ sau va trudng nhi?t dp nude bien trung binh mua mua (tir thang 6 den thang 11) v^ mua kho (tir thang 12 den thang 5 nam sau) tren khu vuc dugc \ky tu co sd du li?u hai duong hpc ciia Bp mon Hai duang hpc, Trudng Dai hpc Khoa hpc tu n2iien, DHQG Ha N6i, vdi quy mo khong gian 0,1 dp kinh vy. Theo do, nhiet dp va biic xa quang hgp tnmg binh mua mua la 27,90-28,35°C va 0.222 cal/cmVphiit, miia kho la 21,0-22,1''C va 0,164 cal/cm Vphiit.
Hgi nghj Khoa hgc vd Cdng ngh4 biin todn qudc lan thic V
- Ndng dp cac mudi dinh duong NH4*, NO2", NO3' va PO4"' trung binh miia mua, mua kho vd trong cac giai doan trudc va sau khi cd d^p thiiy dien Hda Binh tai vtng biin nghi6n ciiu dugc Vien Tai nguyen va Mdi trudng bien td chiic thu thap, dieu tra khao sat vd tinh todn quy vl gia tri trung binh tren cdc mien d^ sSu <5m, 5-lOm, 10-15m, I5-20m, 20-25m va >25m (bang 1). Cdng viec dugc thuc hi?n trong khudn khd dl tai d^c \^p cip Nha nude "Nghien ciiu, danh gid tac dpng ciia cac cdng trinh hd chiia thugng ngu6n din dien biin hinh thdi va tai nguyen - moi trudng viing ciia sdng ven bien d6ng bang Bac Bp", ma sd DTDL.2009T/05.
Bang Khu
VU'C
Vimg bien khu vuc ciia sdng pheu Bach Ding
bien khu cira song thd song Hdng
/. Hdm luong trung bin}
T.gian
Trudc dap dap
Sau dip dap
Trudc dip dap
Sau dip dap
Mien dp sau
<5m 5-10 10-15 15-20 20-25
<5m 5-10 10-15 15-20 20-25
<5m 5-10 10-15 15-20 20-25
<5m 5-10 10-15 15-20 20-25
cdc mudi dinh dudng o viing bien ven ba dong bdng Bdc BQ Trung binh miia mira ({tg/l)
N- NH/
52,764 46,800 23,078 15,149 10,479 31,995 22,891 13,655 10,028 5,954 81,174 49,858 32,124 21,464 16,798 44,347 23,585 17,506 12,760 8,705
N- NOi 78,325 53,338 92,772 60,693 46,754 08,988 84,750 60,255 40,753 30,000 273,170 62,110 23,993 85,288 70,153 50,226 86,741 73,545 51,389 40,184
N- NOi 19,438 14,235 9,627 8,781 6,737 11,846 9,744 7,225 6,816 4,879 29,823 14,809 11,933 11,204 9,332 16,362 9,875 8,207 7,864 6,009
p-po/- 22,582 20,653 10,933 8,394 6,504 12,234 9,772 6,822 5,372 3,550 36,738 22,045 14,879 12,122 10,628 18,388 10,087 8,502 6,984 5,346
Trung binh mua khd (pg/1) iV-
NHt*
14,869 13,097 7,692 5,827 3,638 10,959 8,865 6,160 4,765 3,137 50,296 29,024 16,755 14,609 9,143 29,634 16,663 10,809 9,372 6,065
N- NO3- 67,404 61,901 47,969 31,345 20,204 48,875 44,291 38,407 26,021 16,949 235,266 128,177 104,53 75,347 55,966 137,364 76,739 67,422 49,104 35,969
N- NO2'
7,360 6,764 5,522 4,265 3,118 5,292 4,885 4,511 3,736 2,646 26,090 13,837 11,497 8,645 8,299 15,166 8,348 7,577' 6,033 5,402
P-POt'-
6,886 6,357 3,939 2,994 1,949 5,056' 4,356 3,179 2,477 1,580 23,458 13,891 8,433 7,271 6,009 13,792 8,044 5,485, 4,720 3,73?
Tiiu ban Sinh thdi, Mdi tnrdng vd qudn ly Bien 215
- Cac thdng sd sinh thai ciia md hinh dugc lua chpn tren co sd tham khao cdc tai li$u da cdng bd, phu hgp vdi dilu kien biin nhi$t ddi Viet Nam vd vung biin ven bd tay vmh Bic B0[U,3.5,7].
2. KtT QUA NGHlfiN CtTU VA T H A O LUAN
TTieo s6 liSu bang 1 thiy rang ham lugng dmh dudng trong nude biin tai cdc khu vuc cua sdng hmh pheu B^ch Dang va ch^u thd sdng Hdng cd s\r khac nhau rd ret (viing cua sdng Hong ludn cd h^m lugng dmh dudng Idn hon). Dac dilm chung nhit phSn b6 dinh dudng theo mat rpng tren khu vyc nghien curu trong ca 2 mua va 2 giai d o ^ tnrdc va sau khi cd d^p thugng ngu^n Id: 1) noi cd ndng dp dinh duong cao diu la cac khu vuc ciia sdng va ddi nude sat bd, va 2) xu the giam nong dp dmh duong khi ra xa bd Id d^c tnmg n6i b?Lt (minh hga tren hinh 2). Ciing theo bdng 1, ham lugng dmh dudng cdxu thi giam trong miia khd so vdi mua mua vd giam a giai doan sau khi cd d|p so vdi trudc khi cd dap;
t^ I? suy gidm theo miia va theo giai do^n nhin chung khdng khdc nhau nhilu, cd thi coi Id tuong duong (bang 2).
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Hinh 2. Hdm luong POi^ (pg-P/l) trung binh mua mua trudc khi co dap (ben trdi) vd hdm luong NOi (fig-N/1) trung binh miia kho sau khi cd dap (ben phdi) Bdng 2. Ty li (%) suy gidm ndng do cdc muoi dinh dudng theo mua vd theo giai dogn
% suy gidm ning d$ muii dinh dudng trong miia khd so vdi miia mva & cdc giai doan
Mien dg sou
<5m
• 5-lOm
Trir&c khi co d^p N-
51,42 53,19
N- NOi 32,88 35,67
N- - NOi 31,97 24,60
P-POt 49,49 49,09
Sau khi cd dap N-
NHt*
47,14 42,73
N- NOi 28,31 26,92
N- N0{
27,58 30,59
P-PO4
39,88 34,86
216 Hgi nghi Khoa hgc vd Cdng ngh4 biin todn quoc Idn thir V
10-15m 15-20m 20-25m Trung binh
55,69 44,21 53,92 51,69
29,16 27,09 36,19 32,20
19,80 34,76 30,48 28,32
51,93 50,47 54,53 51,10
46,29 38,11 38,41 42,54
21,34 18,80 26,50 24,37
21,31 32,81 27,99 28,06
44,02 42,55 41,79 40,62
% suy giam nong dp dinh du-dng sau khi cd d^p so vdi trudc khi cd dap trong cac miia
Mien dp sau
<5m 5-1 Om 10-15m 15-20m 20-25m Trung binh
Trong mita mua N-
NHi*
44,03 52,09 44,13 39,65 46,19 45,22
N- NOi 43,64 45,71 39,03 38,83 39,84 41,41
N- NOi 43,79 32,39 29,33 28,88 32,07 33,29
p-po/- 48,96 53,69 41,32 41,51 48,02 46,70
Trong miia khd N-
NH4*
39,09 41,38 32,29 33,05 28,08 34,78
N- NOi 39,81 38,33 32,30 31,87 30,71 34,60
N- NO2' 40,16 1,1,11 30,66 26,75 29,64 33,00
P-PO,'-
39,26 40,75 31,67 32,16 33,45 35,46 Vdi dac diem phan bd va bien ddng cdc yeu td mdi trudng nhu da neu, cdc d§c tnmg ciia qua trinh san xuat vat chat hihi co trong quan xa sinh v$t ndi bien tgi vung bidn ven bd dong bdng Bdc Bp cung co nhiing bien ddng d£ic thii. Toan b$ kit qua tinh toan dugc tong hgp tren bang 3 va the hien minh hpa tren cdc hinh 3, 4 cho thay mpt sd dac diem co ban sau:
1) Xu the suy gidm gia trj trung binh cdc dac trung cua qua trinh sdn xuat vat chat hCu CO tren toan vimg bien ven bd the hien khd rd sau khi cd dap chiia thugng nguon. Miic giam cho cac dac tnmg khac nhau dao dpng cd 38-80% trong mua mua va 34-70% trong miia khd (bang 3), cho thay anh hudng rat Idn cua boat dpng dap chiia thugng ngudn tdi h?
sinh thai biin ven bd theo chilu hudng bit Igi. Dilu nay phii hgp vdi sir biin dgng (suy giam theo cdc quy md) cua cac yeu td dinh dudng nhu da phan tich d tren (bang 1, 2 va hinh 2).
2) Phan bd gia tri cac dac tnmg cua qua trinh san xuit v^t chat hiha co trong quin xa sinh vat ndi d vimg biin nghien ciiu (tinh trong don vi the tjch Im ) cd xu thi giam din khi ra khoi ciia sdng vd xa bd (hinh 3), tuang iing theo phdn bd cac dudng ding sau trong khu vuc. Dac dilm nay phu hgp vdi phan bd ndng do cac ylu td dinh dudng.
Tieu ban Sinh thdi, Mdi tricdng vd qudn ly Biin
Bdng 3. Tdng hgp kit qud tinh cdc ddc trung cua qud trinh sdn xudt vdt chdt hicu co trung binh trin todn viing bien ven bd dong bdng Bdc Bg
Cic dac trung
Miia mua Trud-c dap dap
Sau dap dap
%
suy giam
Miia kho Trudc
dap dap
Sau dap ddp
% suy giam /. Cdc gid trj trung binh trong 1 dan v/ thi tich (m')
Sinh khoi TVN (mg-tuoi/m') Nang suat so cap thd (mgC/mVngay) Nang suat so cap tinh (mgCW/ngay) Sinh khdi DVN (mg-tuoi/m^) Ddng hoa (mgCW/ngay) Nang suat DVN (mgCW/ngay)
583,89 66,86 54,98 21,23 17,11 0,68
359,9 4 32,82 25,50 9,73 7,39 0,30
38,35 50,91 53,62 54,17 56,81 55,88
415,8
• J
33,81 29,42 14,86 8,22 0,33
272,44 18,63 15,76 8,35 4,27 0,17
34,48 44,90 46,43 43,81 48,05 48,48 2. Cdc gid trj trong cpt nu'd'c Im tit mat den ddy
Tdng sinh khdi TVN (mg-tuaiW) Tdng nang suat so cap thd (mgC/mVngay) Tdng nang sudt so cap tinh (mgC/mVngay)
Tdng sinh khdi DVN (mg-tuoi/m^) Ting ddng hod (mgC/m^/ngay) Ting nang suit DVN (mgC/m%gay)
11431 1043 810 393 245,00 9,80
6071 338 214 112 46,77 1,87
46,89 67,59 73,58 71,50 80,91 80,92
7670 441 359 263 99,15 3,97
4397 167 120 110 28,23 1,13
42,67 62,13 66,57 58,17 71,53 71,54 3. Cdc hieu suat sinh thdi trong c^t nir&c In^
He so P/B ngdy cua TVN Hieu suat tu dudng
Hieu suat chuyen hod ndng lugfng tu nhien
H? sd P/B ngay cua DVN
Hi?u sudt chuyen hod nSng luongTVN- DVN
1,36 5,05 0,0029 0,4661 0,0122
0,77 3,27 0,000 8 0,293 5 0,008 5
0,93 6,27 0,001 8 0,288 9 0,011 0
0,58 4,30 0,0006 0,1913 0,0091
218 Hdi nghj Khoa hgc vd Cong nghj biin todn quoc lan thu V
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Hinh 3. Phdn bo ndng sudt so cdp tinh (mgC/m /ngdy) trong mua kho trudc khi cd dgp thuy dien Hda Binh (ben trdi) vd sau khi cd dap (ben phdi)
3) Gia tri tich phan (tdng) cac dac trung tinh trong cot nude thidt di^n Im^ tu m^t den day ngoai su phy thugc vao gia tri tuyet ddi trong 1 dcm vi tiie tich, cdn phy thu§c vao dO sdu di6m tinh. Bdi vay, phdn bo ra^t rpng cac dac trung nay d viing bien ven bd d6ng bang, Bic Bp chu ylu cd xu thi tang khi ra xa bd tuong ling xu thi phdn b6 trudng dp sau vung biln(Mnh4).
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106 lOSJ 106
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iM.e 106 e I4T 1073
_ Hinh 4. Phdn ho trong mua mua thdi ky trudc khi ddp ddp (mgC/m^/ngdy) '' cda tong ndng sudt sa cdp tinh (ben trdi) vd tong ndng sudt thic cdp cua D VN (ben phdi) •
Tiiu ban Sinh thdi, Moi trudng vd qudn ly Bien 219
KET LUAN
1) Trong so cac dieu kien mdi tnrdng dugc xem xet trong nghien ciiu ndy (nhiSt dp, biic xa, cac mudi dinh dudng), vai trd cua cac chit dinh duong vd co dugc thi hien dac bi^t rd vd Id nguyen nhan ca ban lam biin ddi qua trinh san xuit v^t chit huu ca trong quin xa sinh vat ndi tai vung biin ven bd ddng bing Bic Bd. Biin dgng ciia cac yeu to dmh duQfng d day ngoai nguyen nhan tu nhi^n chi phdi cdn cd mgt nguy6n nhdn rit quan trgng la do boat dgng ciia ho chiia thugng ngudn dieu tilt lupng nude do ra biin qua cac ciia sdng.
2) Do vi?c dieu tiet nude cua ddp thity dien Hda Binh dan din s\r suy giam so vdi trudc khi cd ddp ndng do ciia tirng lo^i mudi dinh dudng hda tan trong nude vimg hiln ven bd dhng bing Bac bd tir 33 den 47%, k^o theo la ^u suy gidm timg dac tnmg rieng biet cua qud trinh san xuat vat chit hQna co tii 34 den 80%. Dieu nay khing dinh dnh hudng rit Idn cua ho^t dpng hd chiia thugng ngu6n tdi he sinh thdi bien viing cira sdng va viing biin ven bd ddng bing Bac Bg.
TAI LIEU THAM K H A O
1. D§ Trgng Binh, 1997. Kit qua tinh todn ndng sudt sinh hgc sa cdp va hieu qud sinh thdi ciia thuc vgt noi vdo mita khd (thdng 1-1997) tgi vinh Ha Long. Tai nguyen va M6i tnrdng biin, Nxb. KH&KT Hd Ngi, T.4,1997, tr. 206-213.
2. Dodn Bg, Nguyin Diic C\r, 1996. Nghiin cuu ndng sudt sinh hgc sa cdp ciia thuc vgt noi trong h^ sinh thdi viing trieu cira sdng Hdng. Tai nguyen vd Mdi trudng bien, T.3, NXB Khoa hgc vd Ky thuat Hd Ngi. 1996, tr. 169-176.
3. Doan Bd, 1998. Nghien ciai nang sudt sinh hgc qudn xa plankton viing ddm phd Tam Giang-Cdu Hai bdng phuong phdp md hinh todn. T^p chi Khoa hgc, D?ii hgc Qudc gia Ha Ndi, 4-1998, tr. 1-7.
4. Doan Bd, 2009. Dgc diem phdn bo vd biin dgng ndng sudt sinh hgc so cdp d vung biin phia Tdy vjnh Bdc Bg. T?p chi Khoa hpc, DHQGHN, 25(1S), 2009, tr.21-27.
5. D I tdi-KHCN-06-02, 2000. Cdc kit qud triin khai md hinh 3D kit hgp thuy nhiet dgng luc va sinh thdi vinh Bdc Bg. Bao cao chuyen de 4, Tai lieu luu tru: tai B0 mdn Hai duong hpc, DHKHTN, DHQGHN, Ha Npi.
6. Vii Trung Tgng, 2004. Sinh hgc vd sinh thdi hgc biin NXB Dai hgc Qudc gia Ha Ngi.
7. Doan Bo, 2005. A model for nitrogen transformation cycle in marine ecosystem.
Proceedings Extended Abstracts Volume, Theme 1, Session 3: Biogeochemical Cycling and Its impact on Global Climate Change, 6^*" lOC/WESTPAC International Scientific Symposium, 19-23 April 2004, Hangzhou, China, Published by Marine and Atmospheric Laboratory, School of Environmental Earth Science, Hokkaido University, Japan, 2005, pp 54-58.
Ngurdi dgc nhgn xet: PGS. TS. Nguyin Chu Hdi
