GIA CHAT LUOIXIG

KHOA HOC C 6 N G H G H E

OAIXIH G I A C H A T LUOIXIG IXIUOC HO CAIVI SOIXI T R 6 1 ^ D I A DAIXl HUYEIXI LUC IXIGAIXI, TIIXlH B A C GIAIXIG

Cao Trudng Son^- ^ Nguy§n Tli^ Bmh^- ^ T6ng Tlii Kim AnhS Nguyen van Diing^, Pham Trung Diic^

T6MTAT

Nghidn ciiu duoc thuc hien tai khu vuc h6 Cam Son, huyen Luc Ngan, tinh Bdc Giang trong nam 2018.12 mSu nudx: mat da duoc hen hanh lay tren hd Cam Son vao mua kho (diang 3) va miia mua (thang 8) de tien hanh phan tich cac chi tieu chat luong nude. Ket qua danh gia chat luong niroc cho thay nuoc ho Chn Scm hien dap ung tdt cho muc dich tudi Ueu thiiy loi nhimg khong bao dam cho muc dich cap nudt smh hoat.

Chat luong nuoc ho khong co sir khac biet vi khong gian (cac vi tri lay miu) nhung lai cd sir khac biet ro rang theo thoi gian, chat luong nude trong miia mua tdt hon so voi trong miia kho. De sic dung nuoc ho Ciim Son cho muc dich cap nude sinh hoat c&n phai co bien phap bao ve va cai thien chat lirong nuoc ho trong thdl gian tdi,

Tir khda: Chat lupng nude, cap nuoc sinh boat, hd Cam Son, huyen Luc Ngan, ngudn nude.

L M H DAU

Trong nhiing nam gan day tinh BSc Giang da quan t&m, chi dao day manh qua trinh cdng nghiep hda-hien dai hda gdp phan thuc day phat tnen ndn kinh te-xa hpi ciia tinh. Ben canh nhimg Ipi ich vd mat kinh te dem lai thi qua trinh cdng nghiep hda - hien dai hda da va dang tac ddng khdng nhd den mdi tnrdng bdi lupng chat thai phat sinh hong qua trinh phat trien ngay cang gia tang, da dang ve chiing loai va sd lupng, hong khi viec dau tu cho xir ly chat thai, bao ve mdi truung b cac cap cdn han che, nhieu thuy vuc hi d nhidm, chat luong cac nguon nude cimg cap cho hoat dpng sinh hoat, ndng nghiep, cdng nghiep, dich vu hen dia ban tinh co dau hieu suy giam anh huong den ddi sdng cua nhan dan (Chi cue Bao ve mdi tnrong Bac Giang, 2018). H6 Cam Son, huyen Luc Ngan la mdt trong nhirng hd du trir nude quan trpng cua tinh BSc Giang vdi nhiem vu cap nude tuoi tieu ndng nghiep; cung cap mroc cho san xuat thiiy didn;

cap nude sinh hoat cho nhan dan, cac khu cdng nghidp, cac thanh phan kmh te khac..Tuy nhien, hien nay chat lupng ngudn nude hd Cam Son dang hi anh huong xau bdi cac ngudn thai trong vimg va khu vuc phu can lien quan. Do do nghien ciiu danh gia chat luong nuoc hd Cam Son de phuc vu cac muc tieu phat

' Tmng tam Ky thuat tai nguyen Dat va Mdi tnidng, Hoc vien Ndng nghiep Viet Nam

" Khoa Moi tmong. Hoc vien Nong nghiep Viet Nam ' Chi cue Bao ve mdi trucmg tinh Bac Giang

hi^n kinh t6, xa hdi la nhidm vu can Ihiet va phai duoc thirc hien mdt each dinh ^ , thudng xuyen.

Z. PHUONG PHAP NGHBy CUU 2.1. Dia di^m nghifin cuu

Hd Cam Son la mot hd nud'c nhan tao dupe xay dung vao nam 1966, chinh thiic di vao hoat ddng nam 1969. Day la hd nude thiiy loi cd t^m quan ti-ong cap qudc gia va la hd thuy led Idn thii nam ciia nude ta sau cac hd: Ddu Tidng, Phii Ninh, Ke Gd va Cua DaL Hd Cam Son dupe xay dung hen sdng Hda, mdt chi luu cap 1 ciia sdng Thuong. Ph^n Idn dien tich Idng hd thupc dia phan huyen Luc Ngan, tinh Bac Giang, mdt phdn thugc huyen Hiru Lung, tinh Lang Son (Hinh 1). Bao quanh hd Cam Son la mdt dien tich rimg Ion 9.746,4 ha thuoc quyen quan ly ciia Ban Quan ly Rimg phdng hd Cam Son. Dien tich rimg nay cd y nghia rat quan hong ddi voi viec duy tri va hao ve ngudn nude cua hd Cam Son (Ban Quan ly Rimg phdng hp Cam Son, 2018).

Khu vuc hd Cam Son mang khi hau dac ti-ung cua khi hau nhiet ddi gid miia cua vimg Ddng BJc Viet Nam vdi sd gid' ning binh quan Ion 1.189 - 1.548 h/nam; nhiet dp tnmg hinh dao ddng 22,8"C - 24,6''C, nen nhiet dp tuong ddi dn dinh qua cac nam (chenh lech chi la 1,8"C); dp am binh quan cua khu vuc hiong ddi cao 80% - 83%; luong mua binh quan ti-ong nam dao dpng 112,8 -- 167,7 mm/nam CFong cue Thdng kd, 2018). Xung quanh khu vuc ho Cam Son cd mat dd dan cu kha thua that (214,8 nguin/km^

vdi hon 22 nghin nguoi phan bd hong 4,8 nghin ho dan chu yeu la ngudi dan tdc Tay, Nung va Kinh.

22 NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 4/2019

KHOA HOC CONG NGHE Khu vuc ho Cam Son la khu vuc vimg cao cua huyen

Luc Ngan, dieu kien kinh te gap nhiju kho khan voi ty le ho ngheo dao dong 5,06% - 8,77%. Hoat ddng kinh te chii yeu cua nguiri dan la san xuat nong

nghiep (ty trgng nong nghiep ciia cac xa ven ho Cam Son chiem 55%-83,l%), cac hoat dong cong nghiep, dich vu gan nhu chua phat trien (UBND huyen Luc Ngan, 2018).

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=— \ S^ = g^— ' -™.i«™ '-^~ -' fr 11 Hinh 1. Vi tri h6 Cam Son h-6n dja b ^ tinh B^c Giang

2.2. Phuong phAp nghito cuu

* Phutmg phap thu thap so lidu thu cap: Thu thap cac sd heu ve dieu kien tu nhien, kinh td, xa hdi, cac thdng tin ve nguon thai...xung quanh khu vuc hd Cam Son tir cac ca quan chiic nang nhu Sd' Tai nguyen & Mdi truong B^c Giang; Phdng Tai nguyen

& Mdi tnrcmg huyen Luc Ngan va UBND cac xa xung quanh ho Cam Son.

* Phuongphap khao sat thuc dia

Tien hanh khao sat khu vuc hd Cam Son de xac dmh cac diem thai va lira chon cae vi tri lay miu nude.

* Phuongphap lay mau ph^n tich

De danh gia chat lupng mroc hd Cam Son da h^n hanh lay 12 mSu nuoc mat tai dd sau 20 cm so vdi mat nude tren hd Cam Son vao hai miia khd (thang 3) va miia mua (thang 8) nam 2018, quy trinh lay mau nude hd tuan thu theo quy dinh hien hanh eua Bd Tai nguyen & Mdi tnrdng. Vi tri cac diem lay mau tren hd Cam Son duoc ehl ra hong hinh 2 (diem mau ddtirNMldenNM12).

Hmh 2. Vi tri l^y mau nuoc h*to h6 Cim Son huy^n Ijic Ngan, tinh Bdc Giang

N O N G NGHIEP VA PHAT TRIEN N O N G THON - KY 1 - THANG 4 / 2 0 1 9 23

KHOA HOC CONG NOHE

* Phuongphap phan ti'ch cac cbi tieu mdi trudng Cac thong sd nhir Nhiet dp nuoc (t°), oxy hoa tan (DO), dp dtrc nudnc va pH nude dupe do ngay tai hien ti-uong bang may do t^/pH/DO/dp due cam tay.

Bang 1. Phuong phap phan tich cac chi t i ^ c h ^ htgije nuoc

Cac thdng sd chat hipng mibc con lai duoc tw"

phan tich h-ong phong thi nghiem theo tbu t" ^ dinh hien hanh a i a Bp Tai nguyen & Mdi inrtmg- - the nhu trong bang 1.

Ten thdng sd Phuong phap phan tich Tong chat rSn lo lung (TSS)

Nhu cdu oxy sinh hoa {BOD5) Nhu cdu oxy hda hpc (COD) Amoni (NH.~)

Phot phat (PO,^) Coliform

JCVNJS0_

Khdi lupng loc qua cai loc soi thm" -IQ-\-S. 6625:2000

tinh _^

Nudi cay trong hi on dinh 0 nhie: J^' 20°C trong vong 5 ngay

JCSS 6625:2000 Chuan dp lupng du K2Cr20-

dung dich mudi Mohr

bang Jc^A• 6491:1999 Phuong phap lessler sii dung may so JQ^;s, 6179-1:1996 mau LTV/VIS tai buoc sdng 410 nm _,___ . Phuong phap lessler sir dung may so

mau UV/VIS tai buoc sdng 410 nm

TO"^' r52Ci2:2'yi8 Hiuong phap loc mang, dem khuan

lac cd phan ling oxydaza am tinh !a \ i T O ' N 6187-2:1996 khuan Coliform

* Phuong phap danh gia chdt lupng nude

• So sanh voi quy chuan chat lupng mroc mat Cac ket qua phan tich thdng sd chiit lirong nuoc ciia hd Cam Scm diroc so sanh voi QCVN08/2015/BTNMT - "Quy chuan ky thuat Quoc gia ve chat lupng nuoc mat" vdi hai muc dich su dung.

WQl WQI 100

-/ Cot A2 - Chiit lupng nuoc dimg de c ^ nux sinh boat nhung cSn co bien phap xu ly phu hgp.

^ Cot BI - Chait lupng nude dung cho tuoi ti&

±uylpi

• Tinh toan chJ so chait lupng nuoc (^^^QO- Quy trinh tinh toan chi so chsit lupng nuoc Wtf tuan thii theo huong d§n cua Tong cue Mdi tnroi^

(Quydt dinh sd 879/QE>-TCMT) theo cong thiic sam

Trong dd:

-^ AVQIa: Gia tri WQI da tinh toan ddi vdi 5 thdng so: DO, BOD5, COD, XH,-, PO/.

-^ WQIb: Gia hi WQI da tinh toan ddi vdi 2 thdng sd: TSS, do duc.

*^ WQIc: Gia tri WQI da tinh toan ddi voi thdng sd Coliform.

Bang 2. Phan hang cac muc chat hipng nuoc &eo dilm sd WQI

^ WQIpH: Gia tii WQI da tinh toan doi wi thong sd pH.

Diem sd ciia WQI se dao dpng 0 - 100 dien (diem cang cao chat lupng nuoc cang tot) va duK phan thanh 5 muc nhu trong bang 2.

Miic I DilmWQI Muc 1 91-100

JSHQK: ifflch sg dung mioc Mauquy u6c Su dung tot cho muc dich atp nuoc sinh hoat

Su dung tdt cho muc dich cap niroc sinh hoar | nhung phai cd bien phap xu ly phu hop.

I Su dung cho muc dich tuoi tieu va cac muc dich luong duong khac.

XanhmiQclaen XanhlacSy

Vang Sir dung cho muc dich giao thdng thuy va cac muc

I dich tuong duong khac ^

Muc 5 Ngudn: Quyetdmh so879/QB-TCMT\Z\ 0-25 Nuoc d nhidm nang can cac bic".

d

24 N O N G NGHIEP V A PHAT TRIEN N O N G THON - KY 1 - THANG 4 / 2 0 H

KHOA HOC CdNG NGHE

3. KET QUA N G H H CUU VA THAU LUAN

3.1. C4c ngu6n 4p IvK Ita chSt Itumg nu6c h6 C i n Son

Bang 3. Linmg nuoc thai phat sinh ttr mot so ngu6n thai chinh trong khu vuc h6 Cam Son TT

1

•I 3

Ngu6n thai Smh hoat Chan nu6i gia sue, gia cdm Canh tac nong nghiep Tdng

Lugng mroc thai (mVngay dem)

3.613,84 878,75 8.207,18 12.699,77

Tyle

(%)

28,46 6,92 64,62

100 Nguon: Chi cue Bao ve mdi ti-udng Bdc Giang, 2018

Khu vuc ho Cam Son la khu vuc khd khan cua huyen Luc Ngan, tinh Bac Giang trong viing gdn nhu khdng CO boat dpng cdng nghiep va dich vu dang ke phat trien. Nguon thai tac ddng ddn chat lupng nuoc hd Cam Son chu yeu den hi: nude thai sinh hoat;

nude thai tii khu canh tac ndng nghiep; nuoc thai tii hoat dpng chan nudi gia siic, gia cdm khu vuc xung quanh ho (Bang 3).

Sd lidu b bang 3 cho thay lupng nude tiiai tae ddng hire tiep ddn ho Cam Son ude tinh vao khoang gan 13 nghin mVngay dem. Lupng nude thai nay cd ehung dac diem la cd chiia nhidu chat dinh duong (nito, phdt pho) va cac hpp chat hiiu co dd phan buy nen rat dd gay d nhidm nguon nuoc neu khdng duoc kiem soat chat ehe. Mac dii luong nude thai phat sinh khdng qua Ion nhung 100% luong nuoc nay Bang 4. K^t qua phan tich ch^t lupng nu6c ho

khdng dupe xii ly ma do thai true hep vao hd Cam Son nen phan nao gay tac ddng xau den chat luong nude hd.

Hoat dong tham quan du hch: Mac dii sd luong khach du hch chua qua ddng nhxmg hang nam vdn cd hang tram lupt khach du lich tm tham quan, van canh hd Cam Son. Do y thtic bao ve mdi trudng kem ndn luong rac thai dupe khach du lich thai bd hen mat hd va eac khu vuc Ian can rat phd bien gay mat my quan cua hd (Hinh 3).

* Hoat dong nudi ca Idng: Tren ho Cam Son hien cd 20 hd nudi ca long vdi quy md nhd (5 - 10 be).

Cac hp nudi ca long sii dung true hep nuoc hd dk nudi ca, cac loai thiic an cdng nghiep dupe su dung cho ca la nguy co ddn toi viec lam gia tang cac chat dinh dudng trong nude hd. Hien nay sd lupng cae hd nudi ca edn it, quy mo nhd nen tae ddng cua hoat ddng nay chua rd rang nhung neu boat dpng nay dupe khuyen khieh day manh se la nguy ca gay d nhidm nude hd trong tirong lai.

* Hoat ddng giao thdng: cac tau thuyen di lai hen mat ho hem an nguy co gay d nhidm dau mo cho hd. Phuong tien giao thdng chu y^u tren ho hidn tai la tiiuy^n cd gdn ddng co phuc vu nhu cdu di lai cua ngudi dan hong khu vuc va boat ddng hd' khach du lich di tham quan hd.

3.2. Danh gid chat lugng nu6c ho Cdm Son

* So sanh vdi QCVN08/2015/BTNMT - chat luong nude mat

Cdm Son, huy^n Uic Ngan, tinh B ^ Giang Thdng sd

pH DO TSS BOD,

COD NH4*

NO, PO,' Coliform

Donvi

mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 MNP/100 ml

Gia tri (TB ± SD) Miia mua

7,76+0,15 7,43±0,64 28,93±7,36 12,23±8,70 23,83±15,13 0,01 ±0 0.01+1,0 0,02±0,0 1.908±466,29

Miia kho 8,68±0,25 7,77±0,28 39,79+21,15

8.09+4,44 30,22±21,97

0.61±0,22 0,01+0 0,04+0,03 1.842±490,68

QCVN 08 A, 6-8,5

>5 30 6 15 0,3 5 0,2 5,000

B, 5,5-9

>2 50 15 30 0,9 10 0,3 7.500 Ket qua phan tich chat luong nude mat cua hd

Cam Son frong miia mua va miia khd dupe chi ra trong bang 4.

Ket qua b bang 4 eho thay neu so sanh vdi cdt BI ciia QCVN 08-MT:2015/BTNMT (chat lupng nude tudi heu thuy loi) thi chat lupng nude hd cdn kha tdt khi hau het cac chi tieu chat lupng nude deu

NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 4/2019

²⁵

KHOA HOC C 6 N G NGHl

dat ngudng eho phep. Chi cd thdng sd COD trong miia khd vupt ngudng nhung miie do vupt nhd. Tuy nhidn, neu so sanh voi cot A2 cua QCVN 08- MT:2015/BTNMT (chat lupng nuoc de cap sinh hoat) thi nud'c hd Cdm Son hien khdng bao dam do cd mot sd cac chi tieu chat lupng nude vupt miic cho phep ca trong miia mua va miia khd. Cu the nhir TSS (vupt trong miia khd), BOD5 va COD (vupt ca trong miia khd va mua), N H / vuot hong miia kho. Nhu vay, nude hd Cdm Son hien dimg tdt cho muc dich tudi heu thiiy Ipi nhimg lai chua bao dam cho muc dich cdp nud'c sinh hoat. Chat lupng nude hd trong mua mua tot hon so voi trong miia khd. De su dung ngudn nude ho Cam Son phuc vu muc dieh cap nude sinh hoat can cd bien phap cai thien chat lupng nude hien tai.

* Ket qua ti'nh toan chi sd chat luong nude (WQI) cua ho Cam Son

Ket qua tinh toan chi sd chat luong nude tdng hpp cua ho Cam Son dupe trinh bay hong bang 5.

Theo do diem sd WQI trong miia mua ciia hd dao ddng 83,49 - 96,07 diem va dat miic tiling binh 90,11 diem xep d' miic chat lupng nude thii 2 (xanh la cay) - chdt luong nude dimg cho cap nuoc sinh hoat nhung can cd bien phap xu ly phii hpp. Trong khi do, diem sd WQI binh quan cua hd trong miia khd thap hon kha nhidu chi dat 64,37 diem (dao dpng 51,77 - 92,03 diem) tuong ling vdi miic chat lupng nud'c thii 3 (mau vang) - chat luong nude phuc vu tudi heu thuy Ipi. Ket qua danh gia nay la tuong ddng vdi ket qua danh gia chdt lupng nude khi so sanh voi QCVN08/2015/BTNMT.

Bang 5. K^t qua tinh toan chi sd chat lupng nude (WQD fatn h6 Cam Son

WQI cu the tai 12 vi hi lay mdu nude ti-en ho Cam Son dupe chi ra trong hinh 3.

Mdu

Nho nhat Ldnnhdt Trung binh Dp lech chuan (SD)

Miia mua WQI (Biem) Mau

Miia khd WQI (Biem) 83.49 • • 51,77 96,07 1 MiieH] 92,03 90.11 ^ H 64.37

3,70

11,38 Mau Mirc 3 M u c I Mirc 3

K^t qua b bang 5 eho thay dp lech chuan giiia cac diem lay mdu Idn lupt la 3,70 (miia mua) va 11,38 (miia khd) la khdng qua Ion dac biet la hong miia mua, nhu vay chat lupng nude tai vi tii Idy mdu tren hd la kha tirong dong d' ciing thdl diem. Diem so

Hinh 3. Di^m so WQI tai cac vi tii Idy mau nuoc ti-fin h6 Cdm Son

Hinh 3 cho thdy su khac biet vd diem so chat lupng nude hong ciing thoi diem (ciing miia) tai cac vi tri lay mdu la khdng qua cao. Tuy nhien, su khac biet v^ chat lupng nude giiia hai miia la rat rd ret.

Chdt luong nude ti-ong miia khd thdp hon dang ke so vdi miia mua, ngoai tni hai diem M9 va MU.

3.3. Thao luan

3.3.1. Chat luang nude hd va cac muc tieu phat trien kinh te, xa hdi

Til eac ket qua danh gia chat lupng nude ho Cdm Son cho thay chat lupng nude hd dap ung tdt cho muc dich tudi heu thiiy loi. Tuy nhien, chat lupng nude lai chua bao dam de cdp nude sinh boat, dac biet la vao miia khd. Theo quy hoach cdp nude tinh Bdc Giang, nude cua hd Cam Son ngoai sii dung de tudi heu thiiy Ipi se cdn dupe sir dung de cap nude sinh hoat eho ngudi dan va cap nude cho eac khu vuc cdng nghiep hen dia ban tinh. De dap ling dupe muc tieu nay cdn thiet phai cai thien chat lupng nude ho de chat luong nude bao dam quy dinh theo heu chuan cot A2 cua QCVN08/2015/BTNMT hoac chi sd WQI dat muc chdt lupng nude mau xanh la cay (Miic 2). De dat duoe muc tieu nay can han ehe bdt ngudn thai vao hd va duy tri ngudn cung cap nude sach thudng xuyen cho ho.

3.3.2. Mdt sd hien phap cai thien va bao ve chat luong nude hd Cam Son

D^ cai thien chdt luong nude ho Cdm Son, tinh Bdc Giang can ehii hpng tdi mot sd nhiem vu trong tam gdm:

Bao ve va phat trien he sinh thai rung xung quanh hd Cam Son. (i) Bao ve nghiem ngat dien hch rimg phdng hp xung quanh hd nhdm duy tri kha nang loc nude va cung cdp nude cho hd; (ii) Day manh hoat ddng chi ha dieh vu mdi tru'dng ning de khuyen khich ngudi dan giir rimg, khdng chuyen doi

26

NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 4/2019

KHOA HOC C 6 N G N G H l

dat rimg sang muc dich su dung khac; (in) day manh hoat ddng trdng rung de phu xanh dien tich dat trdng (1.024,6 ha) xung quanh hd.

Han che vide phat triSn cac nguon thai xung quanh khu vuchd Cam Son: (i) Xac dinh va cdm mdc ranh gidi hanh lang bao ve nguon nude doi vdi hd Cdm Son tiieo diing quy dinh tai Di^u 8, Nghi dinh sd 43/2015/ND-CP ve "Quy dinh lap, quan ly hanh lang bao ve nguon nude"; (ii) Han che cae hoat dpng phat tri^n kinh te trong khu vue ho Cam Son de bao ve nguon nude; (iii) Cham dirt boat ddng nudi ca long tren ho Cdm Son de bao dam chdt lupng nude phuc vu cho cap nude sinh hoat.

Kiem soat cac ngudn thai phat sinh trong khu vuc hd Cam Son: Xu ly lupng nude thai phat sinh tir boat ddng sinh boat, chan nudi va eanh tae ndng nghidp xung quanh hd; h^n hanh dpn dep ve smh mdi hirdng dinh ky tren mat hd va khu vue xung quanh hd.

4.KETLUANVAKIB\inieHI

Ket qua danh gia chdt lucmg nude theo QCVN08/2015/BTNMT va chi sd chdt lupng nude WQI cho thay chat lupng nude hd Cdm Son hien tai su dung tot cho muc dieh tudi heu thiiy Ipi nhung lai khdng bao dam eho muc dich cap nude sinh hoat.

Mdt sd thdng sd nhu TSS, COD, BOD va N H / ciia ho cdn vupt ngudng quy dmh ciia QCVN08/2015 cdt A2 - Chat lupng nude dimg cho muc dich cap nude sinh boat. Trong khi dd, chi sd WQI trong miia khd cua hd chi dat 64,17 di^m (mau vang) tuong duong vdi miic nude sii dung cho tudi tieu thuy Ipi. Chat

lupng nude hd Cdm Son la kha tuong ddng theo khdng gian (giiia eac vi tri Idy mdu) nhung ed su khac biet rd ret theo thdi gian, ehat lupng nude trong miia mua tdt hon hong miia khd.

De cd the su dung nude hd Cam Son eho mue dich cap nude sinh boat va cac mue dich sii dung nude khac can phai cd cae bien phap bao ve va cai thiet chat lupng nude hd hong thdi gian tdi nhu: duy tri he sinh thai rimg xung quanh hd; ki^m soat chat che cac nguon nude thai vao hd va quy hoach tot hoat ddng kinh te, xa hdi khu vuc xung quanh ho d^

ban ch^ eac ngudn xa thai chat d nhi^m vao ho.

TAI UEU THAM KHAO

1. Ban Quan ly Riing phdng hd Cdm Son (2018).

Sd Mu dien tich ning phdng hd khu vuc ho Cam Son.

Bae Giang, 2018.

2. Bp Tai nguydn va Mdi trudng (2015).

QCVN08/2015/BTNMT - Quy chuan ky thuM qudc gia vd chat lupng nude mat. Ha Ndi, 2015.

3. Chi cue Bao ve mdi trudng Bdc Giang (2018).

Quan ly, bao ve mdi trudng dam bao chdt lupng ngudn nude hd Cdm Son, huyen Luc Ngan va cdc khu vuc lan can hdn dia ban tinh. Bac Giang, 2018.

4. Tong cue Mdi tiirdng (2011). Quyd't dinh sd 879/QD - TCMT ngay 1/7/2011 ve viec ban hanh so tay hudng ddn tinh toan chi sd chdt lupng nude.

HaNdi,201L

5. Tdng cue Thdng ke (2018). Nidn giam Thdng ke tinh Bdc Giang 2017. Ha Ndi, 2018.

6. UBND huydn Luc Ngan (2018). Bao cao kinh te, xa hdi huyen Luc Ngan nam 2017. Bac Giang.

WATER QUALTIY ASSESSMENT OF CAM SON LAKE IN LUC NGAN DISTRICT OF BAC GIANG PROVINCE

Cao Truong Son, Nguyen TTie Binh, Tong Tlii Kim Anh, Nguyen Van Dung, Pham Trung Due Summary

This study was earned out around Cam Son lake area in Luc Ngan distnct of Bac Giang province in 2018.12 samples of surface water were collected from Cam Son Lake in the dry season (march) and the rainy season (august) to analysis water quality parameters. Results of water quality assessment have showed that water quahty of Cam Son lake is now well-supplied for imgation purposes but not for domestic water supply purposes. Beside diat the water quality of Cam Son lake has no difference in space O^etween sampling locations) but there is a clear difference over time. Water quahty in the rainy season is better than in the dry season. To use Cam Son lake water for domestic water supply, it is necessary to take solutions to protect and improve the water quahty of the lake in tiie future.

I&ywords: Cam Son lake, Luc Ngan disUict, water Quality, water source, water supply for dometic

Ngudi phan bien: TS. Luong Van Anh Ngdynhan bai: 21/01/2019 Ngdy thong qua phan bi$n; 21/02/2019 Ngdy duyet dang: 28/02/2019

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