• T»chf Kma hoc va Cflng nghe BiSo; Tip 16, SS 3:2016:267-274 DOI: 10.15625/I859-3097/16fl/7344 ht^y/www.vjs.ac.vii/iiidat.php/imst
NGHlfiN CttU BiraC B A U VE KHA N A N G PHAT THAI KHt N H A
KINH Ttr CAC KHU DAT NGAP NlTdC VEN BIEN HAI P H 6 N G
LS Van Nam
W B Tai.ngllyeh vi Mol truing biin-fien Hin lim Khoa hgc vi Cong nghi VietNam E-mail: [email protected]
Ngiy nh|hib^: 26-10-2015
; sZ'lft ^^^'Jiffies khi nhi kinh phat dm tir mgl si logi Mnhiitnggpnuie Hii Phong la nTnl lim^'fr^'n^'Z-^'"^-. ^"^ ^"'""•"• ^""^'*°-Pl-^"tiili,ditnggpmrac rimg hu, nuac 421.956 tan COtJnam vi tir til nggp nuac thuing xuyen 2.246.890 tin COrJnam.
Tit khia: Bit ngdp nuac, phit dial khi nhi kmh, ven biin Hii Phing
I MdBXv
8 Dit ngilpnn*G da mang liii rit nhiSu loi ich
« eho oon nguM, tuy nhien nta khong eo giii
^ pMp s4 dung va phit trik b4n viing thi cic b$
t sihh thii dat ngip mrdc d ^ g thdi ciing li
• ngubn giy pbit thii khi nhi Idnh gop phin gay t ra bien dSi khi hjn. 0 yi?t Nam da cd nhi&
t cflng tehih nghign ciru vg khi gay hieu ling nhi I khih tit cic nguon khic nhau, nghien clhi vi
^ phit dlii khi nhi kinh 4 khu hg dfc ngfp nu6c J c6n rit it, mdd c6 cic nghiSn ctru v^ phit thii I CEi tit eic ruflng Ma ng§p nudrc hay phit thii
• kM tii vitag dat than biin do qui tttah oxy hfla
• than biln hay chiy riing. Vigc n ^ g n ciu vg 9 phit thii khi nhi Unh khu h^ dat ngip nir4c I ttong diSu Mgn Vigt Nam c6 f nghia lioa hpc I vi thvc tiln cao. Bii bio tttah biy kit qui
< nghiSn cliu bw&c dau ve kilm kg luong khi nhi ( Hnh phit thii tii cic khu h$ dit ngip nu4c ven I Win Hii Phdng.
I TAlLIfCVApHirONGraAP S6 ligu liSn quan diroc thu thap tai cic I phing Nflng njjii^ v i Phit ttiln Nflng' thfln, [ phtag Tii nguyte v4 Mfli tnrtag cio qujn vi
huygn, c i e ^ fliudc viing nghign ciru; thu thjp s6 Ugu vg (Bt n ^ nu4o tii cic dl tii tji Vign
r i i nguySn vi Moi truong biln (Vign Hin Mm Khoa hpc v i Ctog nghg Vigt Nam). Loai s l Ugu (dign tich dat n g ^ nuflc, sin lupng liia, sin lirpng nuoi trong thiy sin).
Phiromg phip tfnh toin phit thii kfaf nhi kinh tii iii$t s l loai hinh dit ng^p n n ^ Phmmg phap Hnh loin phit MU kU CH„
COi, N,0 /» ring dit ngfp nir&c tif nhiin, liu dii
Thih _^ toin phit thii dupc thpc hign theo huong dan dia Tiln ban LiSn Chinh phd vl Bien doi Khi hiu (IPCC - Intergovernmental Panel on Clmiate Change) [1,2].
P*iit Ihii CO, Hnh Iheo cing Ihic saa COi-ano = r X E(COi)B x A,mj>
Trong do: CO2.TNU,: Ting hrpng phit thii C02 hi cic ving ngip lut (kg COj/nam); T: tdn gian, ngiy (365 ngiy); E(COJ,a: Phit thii do khuech tin ttung binh hing ngiy (kg COj/haxngiy); ATHLD: Ting dign Uch bl mat bj n p p lyt, ttong do c6 dit bj ngfp lut, dign tich bS mJt sflng, ho bj ngap lyt o i ) ; TNLD: Tu tdiien liu doi.
Phil thii CH, Hnh theo eing thOe sau
CH..rMn - T ^ EfCH.K<r ^ .-irsLD^ T
^ E(CHdi„, >= A TMi>
Trong do: CHA.T\LD'. Tong CRj phat thai tu
\iing ngap lut (kg CH_i nam). T\ thoi gian, ngay (365 ngay). E(CH4>KT He so phat thai do khuech Ian trung binh hang ngay (kg CHj.ha^'ngay). ElCH^Irh He so phat thai trung binh boi bong bong klii (kg CH+'Tia^^ngay);
Ar\LD' Tong dien tich be mat bi ngap lut, trong do CO dat bl ngap lut. dien iich be mat song, ho bi ngap lut (ha),
Phdt thdi A'jO
Phuong phap uac luong phat thai N : 0 tir cac viing ngap luf nay chi co con duong khu&h tan, N2O thai thong qua con ducmg bong bong la khong dang ke, cong thiic sau.
N.~Or, - T '^ E(N:0)KT '' Ar^
Trong do; A'.-OA;;,: T6ng N2O phat thai tir VTing ngap !ut (kg N^O'nam). T thai gian, ngay (365 ngay). E(N:0)KT: He s6 phat thai do khuech lan trung binh hang ngay (kg N^O/ha-'ngay); Ar\w. Tong dien tich ba mat bj ngap lut, trong do co dat bj ngap lut, dien licli be ma! song, ho bi ngap lut (ha)
He sd phdt thdi
He s6 phat thai CO:. CH4 va N.O qua con ducmg khuech tan va phat that CH4 thong qua boi cac bong bong khi
Phat thai do khuech tan.
c, ,,^ = 0,64 + 330''.o kg/ha/ngay
< „ =60,4-145% kg/ha./ngay:
- \ „ = 0,05 ± 100% kg-'ha-ngay:
BOI cac bong bong khi
£,„. =2,83 + 45%kglia'ngay,
^.o ~ khong dang ke, '-s,,= khong dang ki Phuottg phdp tinh todn phdt thdi khi CH, t dat ngap nu&c rimg ngap mgn
Tinh toan phat thai duoc thuc hien tb«
huong d§n cua IPCC [3. 4]. CR, phat thai tir dat am uot va rimg ngap man tao ra bai trifij lay. Trong moi truong co So man th^p ciing m ra phat thai CH4 (dac biet do man < 5%o). phin huy sitih hoc cac chat huu c o co thi din den t?o thanh CR,. Tuy nhien, trong dat bao hoa vcri nuoc bien, giam vi khu^n sulfate, sulfide se thucmg tao ra truoc khi san xu5t metan CH, vj khong phu thuoc vao ham lugng ch^t hiru co.
Lugng khi phat tliai CH4 ya do man cua nuoc viing dat ngap man co m6i quan he ty le nghich, luong khi thai C R , giam khi d6 miiE trong bai trieu lay tang,
CH4 phat thai tir dat am uot rimg ngap man tao ra va bai trieu lay tinh theo cong thirc sau:
CH,., r- -2^,{A„ET' EFii'i Trong do. CH„_so-nEf. C R , phat thai viing dil ngap ntroc ven bien, dugc tao ra boi thirc yk (v) kg CRi.nam"'; AMFJ-: Dien tich dit (bao gom ca bai trilu lay hoac dat ngap nuac ngap m^in), theo loai tham thuc vat (ha); EFH-ET: He sfi phal thai C R , tir dat hiru co va vo co im uot vtii tham thuc vat' kg CHj.ha'.nam"' (voi loai thyc vat Bai tneu ISy nucrc lg, rimg ngap man co d^
man < 18%o thi EF»ET = 193,7 kg CH4.ha''.nam''; do man > 18%o thi EFWET^
O k g C R . h a - ' . n a m ' ) .
Phumgphdp tinh todn phdt thdi CH4, N2O tit ddt ngap nu&c nuoi trdng thUy sdn (NTTS) Phdt thdi N2O
l'm\ toan phat thai duoc thuc hien theo huong din ciia IPCC [3, 4],
Phat thai N2O co the d l dang dugc irtic linh tir cac so lieu tir hoat dong nuoi tr6ng thiiy san trong cac dim nuoi trong thiiy san ven b i k N2O phat thai tai cac dam nuoi thuy san dtrgc u'oc tinh dua tren san luong thiiy san tir cac hoat dgng nuoi tr6ng thiiy san, tinh theo cong thurc sau:
Trong do: N,0,^^ : Phat thai N.O-N tryc tiqi hang nam tir viec nuoi tr6ng thiiy san, kg N2O- N/nam; F,-: San Iugng thuy san hang nam, kg
ftiy sinAiiiB; BPjf. Hf sfl phit thii N3O-N 14 NTTS, (kg N!a-N)/(kg4ily sin).
Hg sl phit thii (CT» NjO-N tii hojt dgng nufli frflng tMy sin li 0,00169 kg NiO-N/kg thiiysin.
Nfi-NA xii Trong dfl: Ar,o: Lugng khi NjO phit thii ttvtc tigp hing nim tii vigc nufli trflng thiiy sin, kg N20/nain.
Phit thii CH,
CKt phit thii tai cac d ^ nufli thiiy sin 3 dugc tinh theo cflng thiic sau:
Si Trong dfl: CHums: Lugmg khi CH4 phit thai IH true ttgp hing nam hi vigc nuoi tring thiiy sin i( (kg C^Hynam); A^TS: Dign tich nufli ttlng thiiy : | sin hing nam (ha); £i?a,<:Hgsl phit dlii CH, if tit host dOng nufli ttlng thiy sin; EFau » lli 375 kg/ha/nam [5].
*| Phmmg phip dnh toin phit thii khi CH, vi j NiOtH'mfngUanuic
» Phit thii khi CH,
Phuong phip tinh theo huflng dan cia
^ IPCC [6]. Phit thii khi metan tii mgng Ilia M (RL) c6 thi dugc tinh nhu sau:
Trong dfl: ^cw,: Phit thii hing nam uoc tmh It ciia khi metan hi ttlng liia nuoc (tln/nam);
I «F„,: Hg sl phit thii khi metan tich hgp ttong I miia thu hoach (tan/ha); £/?.,^ = 0,2 tan/ha;
II Am.'- Dign tich mgng cic miia gieo ttlng mli , nim (nghin ha/nam).
Phat thai khi N,0
Lugng khi NjO phit thii hi mgng liia dugc tinh theo cflng thiic sau:
Nghien ciu bu&c diu vi khi nang phit thii...
Trang dfl: JVi(?,[: Lugng khi N2O phit thii hire dip hing nam tit rugng liia (kg NaO/nam); A:
Dien tich rugng cac mua gieo trflng mfli nam (ha); £F^,o_„: HS sfl phit Ihii N2O-N hi rugng Iiia; £F,,^.-0,7kgN2O-N.ha'".nam-' [7].
Phuorng phip xv 1^ so ligu
Tflng hrgng CO2 tuong dirong phit thii (IPCC, 2006):
COi, = CO2 -f 25CH, -I- 298N2O Lugng CH, phit thai, dli ra CO2, = CH, x 25.
Lugng N2O phit thii, dli ra CO2, = N2O x 298.
Trong dfl: 25, 298: Tigm iHng Iim nong toin clu trong 100 nam cila CKt N2O so vfli CO2, (hg sl khi nhi Idnh tugng dli).
Su dpng phin mgm Microsoft Excel dl tinh ttiin vi xii ly thong kg cic kit qui nghien ciiu.
MET QUA VA T H A O L U . ^
Lirgng khi CH, phit thai tir ait ngip niric riing ng^p m$n
. Hign dign tich tring rung ng^p ni|n ven bign ciia Hii Phflng dat hon 3.700 ha, phin b l theo dgc bo biln vi cic viing ciia sflng. Bai ttieu cao Hnh tir dirflng ding cao 1,9 m/0 m hii dfl li viing phin bfl cic loii ciy ngap mfn ven bim Hii Phong, tip trung fl Thdy NguySn, Kien Th(iy, Ti6i Ling, Cit Hii, Dl Son vi Hii An. D0 man cua nuoc vung cua sflng biln dgng lon, gii tti chgnh Igch ldn vio cic miia ttong nim, tai ciia sflng Vin tic biln dgng khoing 11%, ttong miia khfl va khoang l%o ttong mua mua. Tren cic bai boi ven bign, do in|n dao dgng khi ro net nhu fl Dfl Son bien dgng tit 12%o ttong miia mua dgn 18%. ttong nala khfl Ket ciui tinh phit thii khi CH, hi dit ngjp nuflc riing ngip mjn Hii Phong dugc tttah biy ttong bing 1.
Theo kit qui tinh toin (bing 1) voi dign tich riing ngip man tai Hii Phong li 3.719,9 ha da phat thii hang nim mflt hrgng khi CH, Ii 721 tin (18.025 tan CO2,); khu vuc co tagng phit tiiii CH, cao li huygn Kien Thuy (4.988
tin COynam, 28%) va huyen Tien Lang (4 765 tin COjJnam, 26%): rimg ngap man
huyen Thuy Nguyen phat^ thai C R , thip nlii (1.295 tan COje/nam, 7% t6ng Iugng phat thai), Bang 1. Lugng phat thai khi C R , tai cac khu ning ngap man
TT 1 2 3 4 5 6
Khu virc Huyen Thuy Nguyen Huyln Kien Thyy Huyen Tien Lang Huyen Cat Hai Quin H^i An Qu§n Do Si^n T6ng
Dien tich (ha) 267,5 1030 983,8 423,6 325 690 3.719,9
CH4 (tan/nam) 51,8 199,5 190,6 82,1 63,0 133,7 721
COj, (lan/nam) 1 295 4-988 4 765 2.053 1 575 3-343 -16.025
%C0^
7 28 26 11 9 19 1D0 Ghi chd: So lieu dien lich Iheo de tdi "Nghien cuu tdc dung chdn sdng c
he Ihong de bien a Hdi Phong ". \Ngu6n: Trdn Ehtc Thanh vd nnk, (2011}]. J rirng ngap man den Lirgng khi CR, phat thai tir dat ngap nurffc
nuoi trong thuy san
Ket qua tmh phat thai khi C R ttf d i t ngap nuoc nuoi trong thiiy san Hai Phong hang nam diroc trinh bay trong bang 2.
Theo ket qua tinh toan (bang 2) vai dien tich nuoi trdng ihiiy san tai Hai Phong la 13.001,8 ha da phat thai hang nam mot luong khi CR. la 4 876 tin (121.900 tin CO?,). Cac
khu vuc CO lugng^ phat thai CR^ thip la quan Kien An (1 635 t i n COje/nam, 1%), quan Do Scm (3.845 t i n COi^nam, 3%), quan Duong Kinh (3.760 tan CO;<ynara, 3%) do a day c6 dien tich nuoi tr6ng thtiy san thip. Cac khu vyc CO lugng phat thai C R , cao la huy?n Thiiy Nguyen (17.385 t i n COji/nam, 14%), huy^n Tien Lang (26.438 t i n C O y n a m , 22%), huyfn Cat Hai (20.470 t i n C02e/nam, 17%), do adSy CO dien tich nuoi trong thiiy san Icm.
Bang 2. Lugng phat thai khi CH^ tu d i t ngap nuoc nuoi trdng thuy san TT Khu v^re
1 Qugn Hai An 2 Qugn Kien An 3 Quan 0 6 Son 4 Qu^n Du'crng Kmh 5 Huy^n Thuy Nguyen 6 Huy§n An Du'Org 7 Huy§n An Lao 8 Huyen Kien Thgy 9 Huyen Tiin Lang 10 Huy$n VTnfi Bao 11 Huygn CSt H^i 12 Cac nci khac
Dl^n tich (ha) 1 238,8
174,3 410 401 1 854,3
325,1 796 1 203,8
2 820 1 150,1 2 183,4 440 13.001,8
CHj (tln/nam) 464,6
65,4 153,8 150,4 695,4 121,9 298,5 453,3 1 057,5
431,3 818,8 165 4.876 l>hi chu: So lieu dien Uch theo di tai •'Nghien ciru lac dung chd,
CO,, (lan/nam)
7 463 11 333 26 438 10 783 20 470 4 125 121.900 song cua rirng ngdp (201!). So heu COi,
14 6 9 22 9 17 3 100
man den (Le Van
nuTtr^'^g t h ^ v / a f ' " ' ^ ' "^ ^^' " ^ a p ntrac nuoc nuoi tr6ng thuy san Hai Phong hang nam dugc trinh bay trong bang 3.
Ke. qua ,i„h pha, ,ha, khi N , 0 ti, d j , ngap Theo 1<6, qua linh loan (bang 3), voi sin 270
Nghien cuu buic Siu ve khi nang phit thii ...
hWng UoSi tchag-tbls s*s W ^ i i ^ a n g - h i n g hon nhifti so voi cio qn|n hily«n khic vi phat nam la 97,72 ngjun tin, dg phit ddi htog nam thai limng Idii N2O Mng nam 14 20.979 tin
» « ' toyng kU NjO la 260 tan (77.480 tin COj, (27%); hnyin Tien Lang phat th4i CO2,); huyln Thiiy Ngny&i co sto hi(nig nuai 12.218 tin COi^nam (16%).
ti^tig thiy sto (26,51 n^in, tin) htog nam eao,
Miig3i EKcmg phit thai khlNaO t i dit ngfti mroc nufli tiSng thiiy sto
TT 1 . 2 3 5 7 .
a
3.".
12.
Khu v v c O u $ n H ^ A n Qu$n K6n An Qu^nObSan Qu9n Dirang Kinh HuySn ThOy Nguyen HuySn An Dwong Huy$n An ISo HuySn Ki6n Thyy
• HuyOnTifinLang Huyln VTrih Bao Huy$n Cdt HSi C4c h(ri k h ^
tdr^sd
S i n l u v n g t M y s i n [ i ^ h i n tSn) [8]
4.13 0,52 12,04 4.57 26,51 1,69 4,4 10,84 15.44 7,74 8,81 1,03 97,72
N20(tln/h3m)
32 70,4
28,8 20.6
260
C O ^ ( ^ n a m )
n:4So 100
• i^hlfiMi!silHuCOuiLe VanUamvinnk.. 2015).
Li^glng khf CH4 phit thii tir rn^ng Manure CH, 14 15,840 tin/nai (39&000 tin K^ qui ttoh ph4t thii khi CH, hi ruOngliia G<Vnim). Luong phit Ihii CH, cao 4p tnmg nuiSc Hii Phing htog nam duoc trinh biy trone ™*'8 khu vvc co d i ^ tich ttdng lia Ito ft bing 4. khu vvtcngoailhinh nhu huySn Thiy NguySn _ ; / „ . , , ,, , „ . , (67.500 lin CCWniinii 17%), Ti&l- Lang Di5n tfch trdng lua Hii Phftng hang nim 14 (74.500 tan COiynam, 19%), \Thh Bio (95 500 79,2l%hin ha (H tao ra mOt linmg lon g^o hing tin COj/iffln!, 24%)
ntoi, tuy nhita da phit thii ra mOt hrong khi . . . Btog 4. Luong phit thii khi CH4 tli ruftng hia nuftc rr
1 2 3 4 5 6 7 9 10
K h u v i f c Qu9nKi&)An QuQn Dft Sen Qu$n Dirong Mnh Huy§n Thdy NguySn Huyln An Du>crng Huyin An U o Huyln raflfiThyy H u ^ T i l n Ldng Huyln VTnh BSo C ^ noi khdc
TAngs6
Oi|n tfch (nghln ha) \S[' 1,1
1 2,2 13.5 7,2 10 9,5 14,9 19,1 0,5 79,2
CHt (tdn/nim) 220 200 440 2.700 1.440 2.000 1.900 2.S9O 3.B20 100 1S.840
C O i . {tSn/nfim)
, 47.50p' - '
396.000 100
Luvng khf NiO phit tuu tir ra$ng Ua nuftc R& qui ttah phil thM khi NjO tir rupng 1 ^ nuftc Hii Phtog htog.nam dugc tthih b&y ttong bing 5:
Ditajtich,ttSog;hia.H4i Phtag htog nim la 79,2 n ^ ha, phat thii ra lugmg khi N,b li 87,1 tin/nam (25.956 tin COj/nam).
LuQmg phit dial N2O cao tip trung ftnhirag
Le Vdn Nam
khu VIJC CO dien tich trong liia lim a Idiu vuc ngoai thanh nhu huyen Thiiy Nguyen (4.440 tdn C O y n a m . 17%), Tien Lang (4 887 tdn
COjJnkm, 19%) va Vinh Bao (6.258 tin COiJnam, 24%).
TT 1 2 3 4 5 6 7 B 9 10
Khu VLFC Qugn Kien An Qulii Do Sen Qu|n DLfcng Kmh Huy§n ThCiy Nguyen Huy#n An Difcrng Huyen An Lao Huyen Ki^n Thgy Huy^n Tien Lang Huy#n VTnh Bio cac ncri khfe
Tong s6 Bang
Die
5. Luong phat thai khi N2O tii ruong liia nuoc 1 lich (nghi
1,1 1 2,2 13,5 7.2 10 9,5 14,9 19,1 0,5 79,2
ha) |8] NzO (lan/nam) 1.2 1,1 2,4 14,9 7,9 11 10,5 16,4 21 0,6 87.1
COj. (lan/nam) 358 328 715 4 440 2.354 3.129 4.887 179
25.956 100
Lu(mg khi CHl, CO: va N2O phat thai t u viing dat ngap nuftc thuftng suyen
Kel qua llnh phat thai khi CH4, CO,, NjO tli: vting dat ngap nircrc thirong xuyen duoc trinh bay trong bang 6.
Kit qua tilth toan (bang 6) cho thiy dien
tich d i t ngap nuoc thuong xuyen Hai Phong li 37.988,8 ha hang nam phat thai 48.115 tin CH4; 837.501 tin CO2; 693 t i n NjO. T6ng lugng khi nha kinh phat thai tir dit ngap ntnic Ihuong xuyen Hai Phong la 2.246.890 lia COje/niini.
Bang 6. Lucmg khi CH., CO, va N , 0 phat thai tir viing dJt ngap nuac thuong xuyen Lo?i il^t n g i p CH< (l^n/nam)
DSy cat D^y blin cSt Day bun Hb karst Tijng Ang Lach tneu - s6ng K&nh aSo T6ng
CO;, (tin/nam) T i n g CO,. (tin/nSmt
144,3 19 508,6 7 250,1 136,8 445,7 174,9 10 246,4
37 989
H#s6ph^tthS[
3,47 kg ha 1 ng^y"^
CO; (lin/ngm) N;0 (lin/nam)
182,8 24.708,6
9 182,6 173,3 564,5 221,5 12 977,6
103,9 48 115 J.2D2.S75
H? s6 phm thai 60,4 kg.hai ng^y'
H$ s6 phSl Vni\
0.05 kg.ha 1 ng^y'
159.635,7 3.015.9 9 825,9 3,855.8 225-892,1
1 807,8 837.501 837.501 2.246,890
, (2004)]
"Ddnh gid long quan tiim nang su dung qudn ly ddi ngdp gldl phdp sir dung hap ly •', [Ngudn: Trdn Dirc Thanh va
T6r.g luprng khi nha kinh p h a t thai tir mot s
loai hmh dat ngap nudc Hai Phong (8.025 tan C02c/nam. DSt ngap niroc nuoi trong thuy san tai Hai Phong phat thai hang Bat ngap nuoc rung ngap man Hai Phnna ? ^ , ™ ^ * ' " " ^ ^ ^ ^^^^ - ' ^ I2L900 l ^ da phai thai ha.g nam m i t i C , Idii CH if ^-^^^"'"^ ^^ ^ ^ P '^ " ^^^ ^^" t:0,./nam, tong
.1 iLfcmg khi C H . la cong 199.380 tan C O ^ n a m . Ruong lua nirdc
t?i Bil Phtag phStttii S | g , n a m j n a t ' ! ^ g "
kU CK, la 396000 tin CCVnam ya N2O h 25 956 tin COjynam, t6ng cong 421 956 tan COaB/nam. Lugng khi nha kmh phat thai tu dat ngip nu6c thuong myen Hai Phong B 224«890ianCO2/nta.
Nhu^vSy tong Iuong kJn nhi fanh phat Sial ht mot so IMI hmh dat ng%J nijoo HaiPhong la 2 886251 t&C02,Aani.
il K E T L U ^
J H | thoi^ dat ngfil nu^c yen bien Hai I Phitg da mang lai nhifefai feh: KM n5ng t»
i Mm saoh mSi tru&ng kha nang dilu tilt nu6c v^ dilu h6a khi hSu; kha nang hao vg h* biln ,, v4 cao ctog trinh bft; cac khu bao tln'tu nhien;
-! da d^ng smh hoc va nguin Igd thiSy smh; khai ji thic khoing sin; gii ttj tii nguyen; thiy san;
j ntag, Bm nghifp; du ljch; giii trf; giao thong;
I cing; khoa hoc va giio duo. Ting luong khi 1 nhi khihpbit thai tilr mOt s8 loai htah dit ngap i nudc H a Phftng la 2.886.251 tin COjc/nta.
" Hing mm, rutog hia iH hip thu (nho qua trinh I quang h(ip cila cty hia) dugc 118.800 tin CO2
•4 (L6 Vin Nam vi nnk., 2015), thip hon luong I C02?T>fiit thai hing nim tli mong ilia (421.956 I tin Cp2e) vi thip horn nhilu so vfti lu^ng khi I nhi khlh phit ihii hi mOt s l lo?i hmh dit ngip - nuftc (2.886.251 tin COWMm). H« smh thai
rimg ngip _m|n Hii Phong hign luu ttii li 2.528.748 tin CO2; hing nam ritng ngip man da hip th« U.382.894 tin COa/nam (LS Vin Nam vi nnk., 2015), cao hon nhilu so vfti lupng COjc phit thii hi mOt s6 loai htah dit ngip nuftc hing nim (2.886.251 tin C02e/nim). Nhu v$y ritag ngip man cft vai ttft rit Ifth tjong v i ^ giim phat M i khi nhi Idnh.
LM ciiji cm: Tic gia xm biy tft loi cim on hii di tii cip 00 sft nam 2015, Vi?n Tii nguyin vi Mfti trutag biln "Xac dinh vi Oanh gli miic do phai thai cac khi nha Mnh tai cit: khu vyc dat n^gp nu&c trial, thanh pho Hit Phong trong boi canh bien dSt khi h^u" da hS ttgf tic gia thyc h i ^ nOi dung nghiSn ciiH niy.
TAl lilt;u THAM KHAO i rimg
Nghien cuu bu&c dmt vi thi nangphitifftii...
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4
INITIAL STUDY ON THE POSSIBILITY OF GREENHOUSE GAS EMISSIONS FROM COASTAL WETLANDS IN HAI PHONG
Le V a n N a m
Institute of Marine Environment and Resources-VAST
ABSTRACT: Total greenhouse gas emissions from some types of Hai Phong's -wetlands are 2.886.251 tonnes CO^Jyear. converted from CO:. CH4 and N2O In which, emissions from mangrove, aquaculture. paddy fields and permanent wetlands are 18.025 tonnes CO-iJyear 199,380 tonnes CO.Jyear. 421.956 tonnes ofC02^ear 2.246,890 tonnes CO./year.
Keywords: Weilands. greenhouse gas emissions, Hai Phong's coastal area.
