1. NGUN TI NGUYN NC Bi thuyt trnh T 2 2.I. Vai tr ca ngun nc.
Khi nim nhim ngunncII. Tnh hnh nhim ngun nc nc taIII. Nguyn nhn v
hu quIV. Chnh sch bo v ngun nc VNV. Trch nhim ca cng dn trong vic
bo v tinguyn nc 3.I. Vai tr ca ngun nc. Khi nim nhim ngun nc 4.1.
Vai tr-Nc rt cn thit cho hot ngsng ca con ngi cng nh ccsinh vt: gip
tiu ha, hp thcht, thanh lc, gii phng c t- Nc phc v mc ch sinhhot,
sn xut cng nghip, nngnghip, ng nghip 5.2. Khi nim nhim ngunnc:Hin
chng chu u v nc nh ngha:" nhim nc l s bin i ni chung do con ngi i
vi cht lng nc, lm nhim bn nc v gy nguy him cho con ngi, cho cng
nghip, nng nghip, cho ng vt nui v cc loi hoang d." 6.II. Tnh hnh
nhim ngun ncnc ta 7.1. thnh th v cc khu sn xut:- Hu ht sng h cc
thnh ph ln nh H Ni v TP HCM, ni c dn c ng c v nhiu khu cng nghip ln
u b nhim.- Phn ln lng nc thi sinh hot v cng nghip u khng c x l, m
thng vo cc ao h, sau chy ra cc con sng ln ti vng Chu Th sng Hng v
sng M Kng. 8.- Nhiu nh my khng c trang b h thng x l nc thi, c bit
nc thi t ngnh cng nghip dt may, giy, khai thc khong sn, luyn kim c
mc gy nhim rt Ngun nc thi ca hng nghn Cng ty nghim trng, nhng li
HaiVina Kim Lin c x ra cnh ng pha sau nh my bng "h thng" ny c x thi
trc tip ra sng h. 9.2. nng thn v khu vc sn xut nngnghip: Trong sn
xut nng nghip, do lm dng cc loi thuc bo v thc vt, cc ngun nc sng,
h, knh, mng b nhim, nh hng ln n mi trng nc v sc kho nhn dn. Vic s
dng ty tin ha cht bo v thc vt trn lan trn cc cnh ng v ang lm tng mc
nhim ngun nc. 10.- Do nui trng thu sn t, thiu quy hoch, khng tun
theo quy trnh k thut nn gy nhiu tc ng tiu cc ti mi trng nc.- Cc thc
n d lng xung y ao, h, lng sng lm cho mi trng nc b nhim cc lm pht
trin mt s loi sinh Thy triu khi trn vo b bin vt gy bnh, thm ch c
Bnh Thun du hiu xut hin thu triu mt s vng ven bin Vit Nam. 11.3.
Hin trng nhim nc mt ssng ln nc ta:- Nhiu lu vc sng b nhim nghim
trng, in hnh nh lu vc sng Cu nhim hon ton, hu nh khng cn sinh vt
sng; lu vc sng ng Nai, sng Si Gn b nhim v h sinh thi vng ny b tn ph
kinh khng. Nc mt v nc ngm ngy cng tr ln nhim nghim trng, c bit ti
cc lu vc sng chnh nh sng Cu, 12.III. Nguyn nhn v hu qu 13.1. Nguyn
nhn- nhim nc c ngun gc t nhin: ma,tuyt tan, llt,gi bo hoc do cc sn
phm hot ng sng ca sinh vt, k c xc cht ca chng, s ngm vo lng t, sau
n su vo nc ngm, gy nhim, hoc theo dng nc ngm ha vo dng ln. 14.-
nhim nc c ngun gc nhn to:a. T sinh hot+ nc thi sinh hot khng c x l
m quay trli vng tun hon ca nc.+ Cc bi rc nu khng c thu dn, x l trit
th nc t cc bi rc chy vo cc ao h gn khu dn c, hoc thm vo ngun nc ngm
gy nhim. 15.b. T cc hot ng cng nghip:Cc c s sn xut cng nghip, cc
khu ch xut a phn cha c trm x l nc thi, kh thi v h thng c s h tng p
ng yu cu bo v mi trng => x thi trc tip ra ngun nc.c. Ngoi ra
nhim nc cn do hot ng sn xut nng, ng nghip, t y t 16.2. Hu qu:a. nh
hng n mi trngNc v sinh vt nc:Lm nhim ngun nc mt, nc ngm, cht hoc t
bin cc loi thy sinht v sinh vt t: nc nhim ngm vo lm t b Khu vc ni
khai thc stb ngp chm trong nhim, gy cht cc vi sinh nc bn nn cy ci
khng th no sng ni. vt, cy ci ci cc 17.b. nh hng n con ngi- Ngun nc
b nhim gy nh hng nghim trng n sc khe con ngi:+ Nhim ch: au bng, to
bn, nn ma, thiu mu, nh hng n thn kinh+ Nhim thy ngn: co tht thn
kinh ngoi bin, teo v no, t vong 18.+ Nc nhim asen: Bnh sm da, mt sc
t da, ri lon tun hon ngoi bin, ung th da v nhiu ung th ni tng.+ Vi
khun trong nc thi: gy bnh t, thng hn v bi lit- Trong sinh hot: nhim
nc khin ngi dn thiu nc sch s dng, cc ngun nc nhim bc mi hi thi cng
nh hng n sinh hot v i sng. 19.IV. Chnh sch bo v ngun ncVN 20.- qun
l ti nguyn nc sao cho hp l, nh nc ta thnh lp Cc Qun l ti nguyn nc:
son tho trng cc vn bn quy phm php lut, c ch, chnh sch trong lnh vc
ti nguyn nc, c k hoch s dng v bo v hp l ngun ti nguyn nc 21.- Nh nc
son tho v thc hin Lut ti nguyn nc, vi nhng quy nh chung c bn nh:
Nguyn tc qun l, bo v, khai thc, s dng ti nguyn nc; Ph bin, gio dc v
ti nguyn nc; Ly kin ca cng ng dn c v t chc, c nhn lin quan trong
khai thc, s dng ti nguyn nc, x nc thi vo ngun nc 22.V. Trch nhim ca
cng dn 23.Mi cng dn u c trch nhim trong vic bo v ngun ti nguyn nc.-
S dng nc tit kim, hp l, hiu qu.- Chp hnh chnh sch v php lut v ti
nguyn nc. 24.- Tch cc tham gia cc hot ng bo v ngun nc ni mnh .- Vn
ng mi ngi cng thc hin, ng thi chng cc hnh vi phm php gy nhim hoc
lng ph ngun nc. 25.MERCI
