Suy giảm nguồn hạ lưu các lưu vực sông

Thuc tieh - IQnh nghiem

Suy giam nguon nirac ha iuu

cac liru vuc song

o TRXN XUAN LAC

I loi Ddp ldn Viel Nam

V'd'n di suy gidm ngudn nudc d hg luu cdc luu vuc sdng (LVS)

ngdy cdng diin bii'n phdc tgp. Dikhdc phuc tinh trgng ndy, ddi

hoi phdi cd nhiing bien phdp ddng bg, cd tinh he thdng vdi quan

diem qudn ly tdng hgp tdi nguyin nudc LVS, qudn ly suy gidm ngudn

nudc, khan hiim nudc.

Thuc trang suy giam

ngudn nirdc a ha luu cdc LVS

Sd lidu dilu Ua TNN nhflng

ndm gdn ddy cho thdy, TNN

mua trdn lanh thd Vidt Nam d

miic xdp xi trung binh nhieu

ndm, thdp hon khoang 1 %. Mac

du TNN mua dao ddng d mu'c

trung binh nhilu nam nhung

TNN mat d ha du cac cdng

trinh hd chiia thiiy didn, thiiy

Igi trdn nhiing LVS chfnh nudc

ta nhu sdng Hdng, Ddng Nai,

Sdi Gdn, Sre-pd'c, Sd San, sdng

Ba, Vu Gia - Thu Bdn va mdt sd

sdng khdc, phd bil^n thdp han

trung binh nhilu nam, cd noi

thdp han khd nhilu. Tai ha luu

sdng Da, Thao, Ld vd sdng

Hong - Thdi Binh, ngudn nudc

trong 5 ndm gdn ddy diu thdp

hem trung binh nhieu nam tO 9 -

18%, trong dd, tai tuyd'n Hd

Ndi, thdp hon 22%. Trong cdc

mua kidt, ngudn nudc trong

sdng cdn thdp hon trung binh

cung ky dgii 50 - 60%.

Trong miia kidt nhiing nam

qua, ngudn nudc mat suy giam

nghiem trgng da diln ra d ha

luu cdc hd chiia thuy dien Hda

Binh, Thdc Bd, Tiiyen Quang,

ddn tdi suy giam lidn tuc d ha

Iuu sdng Hdng. Ddy Id hidn

tugng hoan todn khdc vdi binh

thudng vi vl nguydn tdc, cdc

cdng trinh hd chiia deu cd

nhiem vu bd sung ngudn nude

vao mua kidt.

Khan hiem nudc do ngudn

nudc d ha liru cdc sdng suy giam

lai bj tdc ddng manh cua nudc

thai d nhidm vd xdm nhdp man

lam cho vide cdp nudc sinh hoat,

cho san xudt gap nhilu khd

khan. Theo sd lilu dilu tra, tinh

trang suy giam ngudn nudc ddn

tdi thid'u nudc, ban hdn da, dang

xay ra khdng chi 6 mdt vai LVS

ma cdn bao trum ca vilng, miln

hodc d khap ca nudc.

TTieo du bdo ciia ca quan

ehiic ndng, tinh trang suy giam

ngudn nudc, han han, thi^u

nudc cd Ihl xay ra trdn didn

rong d nhilu viing trdn ca nudc,

nhdt la cdc thdng cutfi miia kiet.

Thi^u nudc, suy giam ngudn

nudc cd thi cdng thang hon d

hdu khdp cdc khu vuc Idm anh

hudng Idn tdi cdp nudc sinh

hoat vd san xudt a vung ha du

nhilu LVS chfnh nudc ta.

De xuat mot sd giai phdp

Phdt triln hd chiia thiy

dien, thuy lgi da tao budc tiln

quan trgng trong sii dung TNN,

bao dam an ninh lUdng thuc,

nang lugng vd phat triln kinh le

- xa hdi ddt nudc nhung cung

bdc Id nhilu bdt cdp. Trong moi

nam, cd khi cd hang chuc cflng

trinh ldn, viia, nhd't la thuy difti

nhd dugc xdy dung. Nhi^u

trudng hgp, co tdi 3 - 5 cflng

trinh ihijy didn ciing ddng thcii

thi cdng xdy dung trdn mflt Imi

vuc, gdy anh hudng rdt Idn d6i

TNN, hiiy hoai mdi trudng va

da dang sinh hgc.

Tac ddng cua cdc cflng

trinh thuy didn, thiy lgi dSii

TNN la rdt ldn, khdng thi chl

phan dnh mdt cdch so liwc

trong cdc bdo cdo mang nang

tfnh hgc thudt hodc "danh gia

tac ddng mdi trudng". Do vSy,

doi hdi phai xem xet, danh gia

todn didn hon qua trinh ^

triln thuy dien, thuy lgi, can

3 4 Tai nguydn yg M6I traang | Kyi-Tiling 7/2012