KHOA HOC
PHAN VUNG KHAI THAC NU'OfC DU^CH DAT
NHAM DINH HUCTNG CHO VIEC QUAN LY KHAI THAC SU* DUNG BEN VlTNG NGUON NlTdC VUNG BAN DAO c A MAU
Dong Uyen Thanh Khoa Ky thuat Dia chdt vd Ddu khi (trudng Dgi hoc bdch khoa TPHCM)
Nguyen Ngoc Quynh, Ngo Diic Chan Lien doan Quy hogch vd Diiu tra Tdi nguyin nu&c mien Nam Nguyen Dang Tinh Ca sd 2 Truong Dgi hgc Thuy lgi
Tdm tdt: He thong nu&c du&i ddt (NDD) viing Bdn ddo Cd Mau (BDCM) cd 6 tdng chua nu&c chinh (khdng ki tang qh rdt ngheo nuac). Trong do cd 4 tdng chua nuac duge khai thdc su dung chinh Id tdng qp2-3, qpi, «2' vd nj , hai tdng thu yiu Id tdng qpi vd tdng ni . Mac du cdc tdng chira nuac phdn bd todn viing nhung do dien phdn bd nu&c nhgt/mgn dan xen tren mat cat rdt phuc tgp nen vice qudn ly khai thdc sic dung vd bdo vi ngudn nu&c gap nhiiu khd khdn. Bdi bdo dd hi thdng hda thdng tin ede tdng chiea thanh Bdn do phdn viing khai thdc NDD ty li 1:200.000 de cung cdp nhirng thdng tin cdn thiet cho cdng tdc qudn ly ngudn nu&c tgi timg viing kinh ti - xd hdi (KT-XHf
Tu' khoa: Bdn ddo Cd Mau, Trir lugng khai thdc tiem ndng
Summary: The groundwater system in Ca Mau Peninsula consist of six main aquifers (except Holeenee aquifer). Among them, there are four primary exploited aquifers which are middle- upper Pleistocene aquifer, lower Pleistocene aquifer, middle Pliocene aquifer, lower Pliocene aquifer and two secondary aquifers which are upper Pleistocene aquifer and Miocene aquifer.
Although these aquifers distribute in all research area hut due to the complicated fresh/saline water alternation on cross section, so that it is difficult to manage the exploiting, using and preserving the water resource. This paper systematize all information of the aquifers m Groundwater Exploitable Zoning Map -scale 1:200.000 in order to supply essential information for water management in each social-economic region.
Keywords: Ca Mau Peninsula, Exploitable groundwater reserve
MCf DAU (dgc va hieu) gap nhirng khd khan nhat dinh.
Trong nghien cim dia chk thiiy van (DCTV) ^ a c nha quan ly hoac ngudi khdng cd chuyen truydn thdng, thudng cac thdng tin chuyen "^^" ^^^ '^^^'^ '^han se khd tiep can nhiing mdn duoc tdng hop va thd hien bang cac ban ^^°^^ ^^" ^^^^ ^^^ ^ ^ " ^^ E)CTV nay mdt each dd DCTV. Ban dd DCTV dugc thanh lap theo ^^y ^'^; "'^^"g ^^^ ^ ^ ^^ ^'^o'^ ^^V ^ua Cue quy pham ky thuat hien hanh thudng mang ^ ' ^ ^^at va Khoang san Viet Nam, ngudi ta tinh hpc thuat cao nen viec khai thac thdng tin cung da tim each dan gian hda viec the hien thdng tin chuyen mdn tren ban dd DCTV bang Bdn dd triin vong khai thdc NDD (theo Ngay nhan bai; 19/6/2019 [1],[3],[4]). Cac ban dd nay tuy da duoc gian
^t^Z^mS!^r''' ' " ^ ^ "'i ''^^ « " 8 tin nh^g vin c6n nhung
108 TAP CHf KHOA HOC VA CONG NGH^ THUY LOl SO 56 - 2019
KHOA HOC lai bd sung them cac ndi dung mang tinh
chuyen mdn sau ndn tinh phd bien ciing khdng cao.
Nghien cuu phan bd trii lupng NDD cua mdt vimg lanh hd ngudi ta thudng dua vao cac ban do tdng hgp thdng tm ve trir lugng. Bai bao se danh gia dua theo Ban dd phan vimg khai thac NDD. Trdn ban dd nay se phan chia lanh thd thanh cac khu vuc cd sir tuong ddng vd quy luat phan bd cac tSng chiia nude va kha nang khai thac sir dung. Ben canh dd, dd phuc vu cho quan ly va sir dung hgp ly ngudn nude, ban dd se gan lidn cac viing KT-XH nham cung cap thdng tin trong cdng tac quy hoach phat trien cac nganh va ITnh vuc cd nhu c4u sir dung nude.
Bai bao se ke thira y tudng cua Ban dd tridn vpng khai thac NDD va nghien cihi tieu chi
phan vimg khai thac cua Nguyen Trgng Hien - 2009 [2], ket hgp nhiing xu ly trung gian nham the hien cac thdng tin can thiet mot each don gian de nhieu ngudi cd the de dang tidp can.
1. TONG QUAN HE THONG NDD VUNG BDCM
Ket qua cua de tai Nghien cuu khoa hpc cap nha nude: KC08.08/16-20 (Ddnh gid, du bdo phdn bo tru lugng tdi nguyin nu&c du&i ddt
theo cdc kich bdn hien tgi, dinh hu&ng t&i ndm 2030 vd 2050), da chi ra trong pham BDCM tdn tai 7 tang chiia nude Id hdng: tang Holocen (qh), tang Pleistocen tren (qps), tang Pleistocen giiia - tren (qpa-s), tang Pleistocen dudi (qpi), tang Pliocen giiJa (n2^), tang Pkiocen dudi (ni') va tang Miocen trdn (ni"').
Dac diem phan bd cac tang chiia nude nhu thdng kd trong Bang 1 va Bang 2.
Bang 1: Dac diem phan bo theo dien cua cac tang chira nirdc
TT
1 2 3 4 5 6 7
qh qp3 qp2-3 qpi n , ' nz' n , '
Dien tich phan bo (km') 8,052 14,545 16,564 16,667 16,092 15,580 14,111
Dien tich phSn bo theo viing (lun^) A
3,826 4,332 4,332 4,332 4,332 4,332 4,149
B l 1,482 1,482 1,482 1,482 1,482 1,482 1,482
B2 1,558 1,923 2,083 2,082 2,082 2,082 2,082
B3 181 968 1,132 1,132 1,132 1,132 1,132
C I 183 2,177 2,177 2,177 1,639 1,448 572
C2 18 1,025 1,053 1,052 1,015 688 286
D 602 1,086 1,254 1,359 1,358 1,365 1,357
E 201 1,553 3,051 3,052 3,051 3,051 3,051
TT
1 2 3
Bang Tang chtra nu'6"c qh qp3 qP2-3
2: Dac di^m phan bd theo chieu sau ciia cac tang chu-a nud'c Chi^u sau mai (m)
Tir 0.0 20.0 44.0
D^n 61.0 94.5 162.0
TB 19.6 46.3 85.1
Chieu s§u day (m) Tir
8.0 29.0 62.2
Den 75.0 162.0 207.0
TB 30.8 71.7 127.2
Be day (m) Tir
0.6 1.9 2.0
Den 65.0 122.4 109.5
TB 11.3 25.6 42.1
TAP CHlKHOA HOC VA CONG NGHf THUY LOI S6 56 - 2019 109
KHOAHOC ^ r f . i J I J J I t l i M i
TT
4 5 6 7
T a n g c h i r a nu-o^c
qpi n.' n,' n,^
C h i e u s a u m a i ( m )
Tir 85.5 130.0 149.0 285.4
D^n 226.0 310.6 363.3 508.0
TB 147.0 210.6 283.4 378.0
ChiSu sau day (m) Tir
108.0 144.0 180.0 313.5
DSn 287.2 334.0 408.7 602.0
TB 186.9 256.9 328.6 442.3
Be d^y (m) Tir 3.0 3.0 10.0 6.5
Din
110.2 133.0 139.0 129.0
TB 39.9 46.3 45.3 64.2
Trii lupng khai thac tiem nang NDD dugc danh gia cho 6 tang cd tridn vpng sau: tang qp3, tang qp2-3, tang qpi, tang n2 , tang n:' va tang ni . Tang qh cd dien phan bd hep, chieu day mdng, mirc dp chua nude ngheo, khdng tien hanh tinh toan. Trii lugng khai thac tiem nang nude nhat toan BDCM la 11.3409.102 mVngay, lam tron sd:
11.340.100m^/ngay. Trong dd; Trir lugng tmh
trpng luc: 8.972.925m7ngay. lam trdn sd:
8.972.900mVngay; Trtr lugng tmh dan hdi:
870.23 Im^/ngay. lam trdn sd: 870.000mVngay va Trii lugng ddng: 1.496.947m^/ngay. lam trdn sd: 1.497.900m^/ngay. Tai timg vimg sinh thai trir lupng khai thac tidm nang dugc thdng ke trong Bang 3 va trii lugng dpng dugc thdng kd trong Bang 4.
Bang 3: Tru' lirong khai thac tiem nang NDD
Tang chiia niroc
qpi qpM qpi
f;"
":'
n,'^
Tdng
Tro l u ^ g khaitiiactilmD^gaii6c nhat (mVngSy) A
433.679 887.558 439.591 198,225 568,309 146.056 2.673.420
Bl 170.785 387.348 279.629 115.277 703 127,137 1.080.879
B2 36.575 532.591 394.524 202.120 155.106 334.778 1.655.694 Bang 4: Trir in Tang chua
n u a c qp3 qp2...
TrirliH?ng(
A 9 7 7 1 1 146.178
Bl 67.940 84.347
B2 8.273 95.811
B3 0 322.987 313.125 321.117 201.224 93.914 1.252.367 ong ddng ong theo vi
33 0 2 2 1 1 8
CI 0 544.772 311.600 237,426 124.264 702 1.218.764 tai cac v ng sinh tha
CI 0 67.486
C2 0 242.478 248,52!
154.507 0 0 645.506 iing sin:
1 (mVngai
C2 0 41.624
D 14.571 329.285 403.621 209.349 150.957 11.033 1.118.816 1 thai 1)
D 2.588 79.316
E 0 529,664 627,469 394.273 143.250 0 1.694.656
E 0 44.916
Tdng (mVngiy)
655.611 3.776.684 3.018.079 1.832.295 1.343.814 713.620 11.340.102
Tong (m'/ng4y)
176.512 581.796
110 TAP CHf KHOA HOC VA CONG NGHE THUY LOI S 6 56 - 2019
KHOA HOC
mss^
Tjngchua nu6c
qPi
ni
0.2
n,' Tdng
Trtt lw?ng dpng theo vung sinh thai (mVng^y) A
19.834 11715 30.433 14.393 320.265
Bl 25.243
8.239 0 14.374 200.142
B2 36.245 19.966 17.706 8.528 186.529
B3 20.715 38.022 16.602 2.116 99.573
CI 17.899 15.100 8.084 702 109.270
C2 26.553 19.825 0 0 88.002
D 78.148 31.293 29.266 2.600 223.212
E 106712 96.062 22.263 0
^ 9 . 9 5 2 Tdng (m'/ngay)
331.350 240.221 124.355 42.713 1.496.947
2. PHU'CNG PHAP PHAN VUNG KHAI THAC NDD 6 BAN DAO CA M A U
2.1. Nguyen tac phan viing
Ban dd Phan viing khai thac NDD dugc thanh lap thep nguyen tac nhu cdu su dung nuac vd triin vong khai thdc NDD. Theo nguyen tac phan viing, vimg lanh thd dugc phan chia theo cac tidu chi sau:
- Nhu cau su dung nude de phat trien (nhu cau sir dung dung nude tai cac viing KT-XH).
- Trien vgng khai thac nude nhat (cd trien vong khai thac NDD chat lugng tdt hay khdng?).
- Miic dp dap ling nhu cau sir dung nude cho sinh hoat va san xuat (tiem nang ngudn NDD va miic do dap ling nhu cau).
2.2. Cor so* I^p Ban dd dia phSn viing khai thac a- Ban dd ndn dia hinh: Ban dd nen dia hinh sir dung dd lap ban dd Phan vung khai thac la ban dd dia hinh VN 2000 ty le 1:50.000. Ban dd thd hien cac thdng tin: Vi tri va ten cac thanh phd, tinh, huyen, xa, ap ten sdng, ludi tpa dp, dudng bien gidi vdi cac tinh, cac mdc dp cao dia hinh, he thdng dudng d td (dudng d4t, dudng trai nhua), mang sdng, sudi, kenh rach, hd ao.
b- Ban dd nen DCTV: Sir dung an dd ndn DCTV cd ciing ty Id 1:200.000. Tren ban dd Phan viing khai thac N D D , se sir dung cac ranh gidi cua ban do DCTV va cac thdng tin chuydn mdn khac.
3. NOI DUNG VA PHU'ONG PHAP THE HIEN 3.1. Ngi dung: Tren pham vi BDCM, tuy viing se tdn tai td hgp mdt hoac nhidu cac tang nude cd trien vpng cd the dap irng nhu cau cap nude cho ddi sdng va san xuat. Tiiy khu vuc cu the, se cd td hgp cac tang chua nude khac nhau, cd the trong khu vuc nay mdt tang chiia nude se ddng vai trd quan trpng nhat nhung d mdt khu vuc khac thi lai ddng vai trd thu yeu hoac khdng cd. Toan vimg cd tat ca 6 tang chiia nude (khdng ke tang qh), trong dd tiem nang khai thac nude nhat tap trung vao 4 tang chiia nude chu yeu ta: tang qp2-3, qpi, n2 va ui . Hai tang chiia nude qp3 va ni^ tuy cd thd khai thac nude nhat chat lugng tdt nhung chi dugc xem la thir yeu do:
- Tdng qp3: be day tang chira nude nhd, chi cd kha nang khai thac quy md nhd hd gia dinh ndn dugc xep vao hang thii yeu de lam ngudn dutrij.
- T i n g ni^: bd day ldn va giau nude nhung do phan bd qua sau nen chi phi dau tu khai thac cao ndn chi dugc mot vai nai khai thac
TAP CHl KHOA HOC VA C O N G NGHE THUY LOI 5 6 56 - 2019
KHOA HOC
ciing dugc xdp vao hang thii ydu dd lam ngudn du trii.
Can cir trdn nguyen tac nay toan pham vi BDCM se dugc phan chia theo 3 don vi ca ban tir ldn den nhd sau:
Vung: Thdng thudng thudng phan chia theo tieu chi muc tieu khai thac sir dung cac ngudn nude nham dap irng cac nhu cau phat tridn KT-XH. Nam 2007, Vien Quy hoach Thuy lgi mien Nam da phan chia BDCM thanh 8 tidu sinh thai san xuat dua tren co sd tai nguyen nude va md hmh san xuat (ky hieu: A, Bl, B2, B3, CI, C2, D va E). Do dd, bai bao se ke thira kdt qua nay (Hinh la).
Khu: Phan chia theo trien vpng khai thac NDD nhat (cd thd khai thac NDD nhat hoac khdng cd nude nhat). Xem Hinh lb.
- Khu cd trien vgng khai thac dupe NDD nhat (cd I nhat 1 tang chua nude phan bd nude nhat). Ky hieu: I.
- Khu khdng cd trien khai thac NDD nhat (tat ca cac tang chiia nude deu phan bd nude man).
Ky hieu: II.
Khoanh: Mirc do dap ung nhu cau sir dung nude cho sinh hoat va san xuat. Tieu chi de phan biet la sd lugng cac tang chiia nude khai thac chu yeu va trtr lugng khai thac tiem nang.
- Khoanh I-l - it nude: khu cd 1 ting chiia nude nhat (tang qpi-s)-
- Khoanh 1-2 - trung binh: khu cd 2 tang chiia nude nhat (tang qp2-3va qpi).
- Khoanh 1-3 - nhieu nude: khu cd 3 ting chiia nude nhat (tang qp2-3, qpi va ni^).
- Khoanh 1-4 - rat nhieu nude: khu cd 4 ting chira nude nhat (tang qp2-3, qpi, n2^ va ni').
Trong khu II khdng phan chia den don vi khoanh.
3.2. Phuong phap thyc hien
Tren co sd nguyen tic neu tren va ket qua nghien cuu cua dd tai, bao cao tien hanh xay dung Ban dd Phan viing khai thac NDD theo trinh tu cac budc sau:
Birdc 1: xac djnh cac vung khai thac sir dung NDD.
Xay dung ban dd cac viing khai thac, xac dinh pham vi phan bd„ ranh gidi, dien tich...
- Tinh toan trir lupng NDD cho timg vitng (trii lugng khai thac tiem nang va trii lugng cd the khai thac).
Budc 2: xac djnh cac khu Idiai thac sa d\ing NM>
- Chdng xep cac ban dd ranh man (M = 1 ,Og/l) ciia 4 tang chiia nude chinh qp2-3, qpi, n2^ va n2'. Khoanh dinh cac khu khai thac NDD: xac dinh pham vi phan bd„ ranh gidi, dien tich...
Trong tirng vimg khai thac, tien hanh tinh toan trii lugng NDD cho timg khu khai (trii lugng khai thac tiem nang va trii lugng cd the khai thac).
Bu^c 4: xac dinh pham vi co the khai thac ntrdc nhat trong cac tang chira nirdc thir yeu.
- Khoanh dinh cac vimg phan bd nude nhat dua theo tanh man M^ 1 ,Og/l cac ting chiia nude.
- Trong timg khoanh khai thac, tidn hanh tinh toan trir lugng NDD cho timg tang chiia nude thii yeu (tru lugng khai thac tiem nang va trii lugng cd the khai thac).
Birdc 5: Xay dirng Ban do phSn viing khai thac NDD.
- Xay dung chu giai ban dd
- Sir dung quy trinh chdng ldp cac ban do thuc hien trong cac budc trudc.
- Dua thdng tin chuyen mdn len ban dd.
Kdt qua thuc hien the hien trong Hinh 3.
112 TAP CHI KHOA HOC VA C O N G N G H $ THUY LOI SO 56 - 2019
KHOA HOC
^mim
(a) (b) Hinh 1: Bdn do phdn vitng sinh thdi (a) vd Bdn dd phdn khu triin vgng khai thdc (b)
Hmh 2: Bdn dd phdn khodnh khai thdc viing BDCM 3. KET QUA VA THAO LUAN
Toan BDCM dien tich cd the khai thac NDD nhat la 13.901,9km^ (chiem ty le 83,4%) va dien tfch cac tang chira nude nude man la
2.758,lkm^ (chidm ty Id 15,6%). Tru lugng khai thac tidm nang NDD nhat la
11.340.102m^/ngay (trong dd trii lugng cd the khai thac la 741.534m^/ngay, chidm ty le xap xi 6,5% trii lugng khai thac tiem nang nude nhat) va NDD man la 14.865.900mVngay.
Trong pham vi phan bd nude nhat (khu I), trong tirng khoanh cd tiem nang khai thac khac nhau:
- Khoanh it nude: chi khai thac sir dung nude trong ting qp2-3 vdi dien tich tdng cdng 2.844,8 k m l
- Khoanh tmng binh: khai thac su dung nude trong ting qp2-3 va qpi vdi dien tich tdng cdng 4.832,6 k m l
- Khoanh nhieu nude: khai thac su dung nude trong ting qp2-3, qpi va n2^ vdi dien tich tdng cdng 2.847,1 k m l
- Khoanh rat nhieu nude: khai thac sir dung nude trong ting qp2-3, qpi, rij va n2' vdi didn tich tdng cdng 3.377,5 km".
Dac trung cac vimg khai thac dugc thdng ke chi tidt trong Bang 5 va Hinh 3.
TAP CHi KHOA HOC VA CONG N G H | THIJY LOI S 6 56 - 2019 113
KHOAHOC ^ . < . i ; i J J M ! l = M
Bang 5: Bang thong ke dac tru-ng cac viing khai thac Vung
Ky hieu
A
Bl
B2
B3
CI
C2
D Dientich
(km')
4.200,0
1.560,0
1.950,0
1.200,0
2.200,0
1.100,0
1.500,0
Khu Ky
hi6u
A-I
A-II Bl-I Bi-n
B2-I
B2-II B3-1 B3-11
Cl-1
ci-n
C2-1 c2-n
D-I
D-11 Dien tich
(km')
3.697,3
502,7 1219,0
341,0
1.646,7
303,3 1.200,0
0,0
1.815,0
385,0 1.000,2
99,8
1.289,5
210,6
Tru luong (m'/ngay) TL khai thac
ti^mnang
2.673.420
4.309.363 1.080.879
1.593.786
1.655.694
1.730.405 1.252.367 514.495
1218,764
1.460.362 645.506 780.035
1.118.816
1.167.337 TLcothe khai thac
151.141
112.263
115.208
78.518
41.254
30,095
80884
Khoanh Ky bieu
^
Didn tich (km^) 1.192,1 A-I-2 1.701,0
^SM 279.6 A-I-4 524,6 H H 148.8
B1-1-2 612,0 I S H H 458.2
417,5 B2-I-2 518,1
wBBt 148,8
B2-I-4 ' B3-I-2
562,3
35,6 H R H 337,9
B3-I-4
V
826,5
^ B H 661.2 Cl-I-2 1 271,0 WSSm 377.3 Cl-I-4 505,5 H H I 100.8
C2-1-2 557,0 ( • • I 342.4
•'="t;>:|
D - I - J 35,2 D-I-2 1 492,7 H H 319.0
D-I4 1 442,6
Triln vpng khai thac nude nhat It nude Trung binh Nhieu nude Rat nhieu nude Khong it nude Trung binh Nhieu nude Khdng It nude Tmnp binh Nhieu nude Rat nhieu nude Khong Trung binh Nhieu nude Rat nhieu nude Khong it nude Trung binh Nhieu nude Rat nhieu nude Khong itnifdc Trunp binh Nhieu nude Khdng It nude Trung binh Nhieu nuoc Rat nhieu nude Khdng
114 TAP CHI KHOA HOC VA CONG NGHE THUY LOI S 6 56 - 2019
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"^m
Vimg Ky U6u
E
Toan BDCM
Dien tich (km')
2.950,0
16.660,0
Khu Ky
hi$u
E-1
E-2
I
n
Dien tich (km')
2.034,3
915,7
13.901,9
2.758,1
Trir luong (mVngay) TL khai thac
tiimnang
1.694.656
3.310.117
11.340.102
14.865.900 TLcdthe khai thac
132.172
741.534
Khoanh Ky hi£u E-I-1 E-I-2
E-I-4
I-l 1-2
^ - 3 1-4
Didn tich (km^) 289,2 645,2 583.9 516,0
2 844,8 4.832.6 2,847,1 3.377,5
Triln vpng khai thac nude nhat It nude Tmng binh Nhieu nude Rat nhieu nude Khong it nuac Trung bmh Nhieu nude Rit nhi^u nude Khdng Ngoai ra, trong timg viing smh thai cdn cd kha 2.350,8km^ vdi trir lugng khai thac tidm nang nang khai thac NDD nhat tai cac tang thir ydu la 713.620mVngay.
Dac trung cac tang chiia nude thu yeu trong - Tang qp3 cd dien tich phan bd nude nhat timg viing khai thac dugc thdng ke chi tidt 2.756,5km" vdi trir lugng khai thac tiem nang trong Bang 6 va pham vi phan bd thd hien la 655.61 Im^/ngay. trong Hinh 2.
- Tang ni cd dien tich phan bd nude nhat
Bang 6: Thong ke dac tru-ng cac tang chira nu'dc thu- yeu trong viing khai thac Viing khai
thac A B l B2 B3 C I C2 D E T6ng
Dien tich (phan bo nu'o'c n h a t k m ' ) qP3
1.929,0 590,5 162,4
74,6
2.756,5 n , ' 452,7 387,8 1.115,0
315,7 50,4
29,2
2.350,8
Trir liroTig khai t h a c tiem nang (mVngay) qp3
433.679 170.785 36.575
14.571
655.611 n , ' 146.056 127.137 334.778 93.914 702
11.033
713.620
Trji- lu-cmg co the khai thac (m^/ngay) qP3
35.607 33.713 6.202
503 0 76.025
n , ' 10.059 6.679 4.799 1.577 581
23.695
TAP CHI KHOA HOC VA C O N G N G H ^ THUY LOI S 6 56 - 2019 115
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iMzmi
Hmh 3: Bdn dd phdn viingkhai K£T LUAN
Ket qua thanh lap ban dd Phan vimg khai thac NDD ty le 1:200.000 viing BDCM se giup ngudi dpc de dang biet dugc tiem nang khai thac NDD trong tirng viing KT-XH. Ben canh do la thdng tin cu the ve sd lugng tang chira nude khai thac va iiu lugng cd thd khai thac.
Day la nhirng thdng tin can thiet cho cdng tac quan ly ve cap phdp khai thac NDD, phan vimg cam va han che khai thac NDD theo Nghi dinh 167/2018/ND-CP va dinh hudng khai thac sir dung ngudn trong quy hoach phat trien KT-XH hoac phan bd ngudn nude trong quy hoach tai nguyen nude (theo Thdng tu 42/2015/TT-BTNMT).
thdc nu&e dual ddt viing BDCM
Phan viing khai thac trong bai bao nay chi mdi xem xet khai niem nude nhat theo truyen thdng cd tdng dp khoang hda M<l,0g/1. Tren thuc te d nhirng viing khd khan vd ngudn nude nhu cac khu vuc ven bien phia nam tinh Ca Mau va mdt sd noi d Kien Giang, Bac Lieu va Sdc Trang ngudi ta van khai thac su dung NDDcdM 1,0- l,5mg/l.
Bdi bdo sir dung kit qua cua de tdi Nghien ciru khoa hoc cap nhd nirdc MS:
KC08.O8/16-2O: Nghien cu-u cdc gidi phdp gidm thieu tdc dgng, thich img vdi thien tai han hdn vd xam nhap man viing Bdn dao Cd Mau.
116 TAP CHf KHOA HOC VA CONG NGH$ THUY LOl S 6 56 - 2019
I KHOA HOC TAI LIfU THAM KHAO
[1] Ngo Due Chan, 2010; Bao cao ket qua thuc hien Dir an Quy hoach khai thdc, su dung va bdo ve ldi nguyen nu&c duai ddt tinh Sdc Trdng den ndm 2020 (Bdn do trien vong khai hdc NDD tyle 1:50.000 tinh Soc Trdng), Sa Tai nguyen va Moi tmong tinh Soc Trang;
[2] Nguyen Trpng Hien, Nguyen Hong Quang va nnk, 2009; bao cao ket qua thirc hien de tai KHCN cap Bo; Nghien cicu ca sa khoa hoc vd thuc tien xdc dinh lieu chi phdn vung khai thdc, viing hgn che khai thdc, viing cdm khai thdc nude duai ddi. Ap dung thu nghiem cho vung hg Itm song Dong Nai - Sdi Gdn; Vien Dia chat va Khoang san; Ha Noi.
[3] Tran H6ng LTnh, 1992; Bdn dd Triin vong khai thdc NDD ty le 1:50.000 viing Bie Hoa - Long Thanh (thupc ih an Lap ban d6 DCTV - DCCT ty le 1:50.000 viing Bien Hoa - Long Thanh; Cue DC&KS Viet Nam (cu).
[4] Trin Anh Tujn va Ngo Diic Chan, 1992; Bdn dd Triin vong khai thdc NDD ty le T50.000 viing Long Thdnh - VHngTdu (thuoc ih an Lap ban d6 DCTV - DCCT ty le 1:50.000 viing Long Thanh Vung Tau; Cue DC&KS Viet Nam (cii).
[5] Nguyen Huy Dung, va nnk, 2004; de tai Phdn chia dia tdng Neogen - De Tu vd nghien cim cdu trite dia chdt viing Nam bo; Bo Tai nguyen va Moi tnrcmg (Luu tai Trung tam Thong tin Khoa hoc va Cong nghe Qu6c gia, MS:6 6949/KQ-TTKHCN), Ha Noi.
TAP CHl KHOA HOC VA CONG NGHE THUY LOI SO 56 - 2019 117
