Xay nha kien co de tam tru khi lu

Thứ hai, 25 Tháng mười 2010, 07:31 GMT+7

O moi mot khu vuc, xay dung 1 - 2 can nha that kien co de nguoi dan khi co lu co the den tam tru, dam bao do che phu cua rung, bo sung quy chuan xay dung cong trinh tren cac song mien Trung... la cach de giam thiet hai cho nguoi dan mien Trung moi khi den mua mua lu. 

Ly giai

GS.TS Dinh Van Uu, giang vien khoa Khi tuong Thuy van & Hai duong hoc, DHTN, DHQG Ha Noi cho biet, tu lau, mien Trung duoc coi la "tam bao" hay "ron lu". Diem nay xuat phat tu chinh vi tri dia ly cua mien Trung. Mien Trung co kha nhieu song: song Lam (Nghe An), song Ngan Sau (Ha Tinh), song Gianh (Quang Binh), song Huong (Thua Thien - Hue)...

Tuy nhien, song mien Trung co dac diem la ngan va co do doc lon trong khi do luu vuc cac song thuong la doi nui nen nuoc mua do xuong rat nhanh gay ngap lut. Nhung nam gan day, cac cua song lai hay bi boi lap lam can tro viec thoat lu cho vung dong bang. Ngoai ra, rung o cac tinh mien Trung dang bi tan pha. Mat do che phu cua rung, khien cho kha nang gay lut dien ra rat nhanh.
 


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Xay dung cong trinh tren song giam thiet hai cho dan mien Trung khi den mua mua lu.

Dong quan diem GS.TS Le Dinh Quang, Trung tam Khi tuong Thuy van & Moi truong cho biet, o mien Trung, so luong song suoi nhieu va  do doc lai lon. Dac biet, cac cua song mien Trung la loai cua  khuyet ao (liman) phia trong co vung cua song rong va nong. Cua song con bi cac con cat chan cua khien cho viec thoat lu rat kem.

Ngoai ra, nguoi dan mien Trung nhieu noi chu yeu sinh song bang nghe danh bat va che bien hai san. Do do, cac bai trieu lay duoc quai dap toi da lam dam nuoi trong thuy san khien cho kha nang thoat lu cung giam...

Bai hoc tu Bangladesh

GS.TS Le Dinh Quang cho rang, dieu quan trong dau tien doi voi nguoi dan vung lu la phai thuong xuyen theo doi cac ban tin du  bao. Cac don vi du bao cung phai dam bao cung cap cac thong tin canh bao cang som cang tot. Truoc mua mua lu, can kiem tra, nao vet cac ho chua de sao lam sao tang dien tich ho chua mot cach tot nhat.

Can phai nghiem cam tinh trang "khoang san vat" (khai thac khoang san quy mo  nho be va trai phep" vi chinh viec khai thac bua bai khoang san khong theo quy hoach vua  anh huong toi moi truong vua lam anh huong toi luu luong cua dong nuoc.

Cac chuyen gia cung cho rang, can phai kiem tra va dam bao viec van hanh cua cac ho thuy loi, ho chua theo cac quy trinh da duoc de ra trong viec xa lu, thoat lu. Ngoai ra, hien nay cac do thi xuat hien vua mo rong nhieu o cac vung cua song, khien cho khi co lu lut, su thiet hai ve nguoi va cua la rat lon. Vi the, can kiem tra lai tat ca cac cong trinh da va dang xay dung tren cac dong song, can bo sung quy chuan xay dung cong trinh tren cac song mien Trung...

Dac biet, GS.TS Le Dinh Quang cho biet them, hien nay, o mot so noi dang ap dung xay truong hoc, xay tram xa rat kien co, mot mat de lam truong hoc, mat khac khi co lu co the su dung lam noi tru an. Dai dien cua Trung tam Du bao Khi tuong Thuy van TU cho biet, trong viec chong lu, chung ta co the hoc tu truong hop cua Bangladesh. Do la mot dat nuoc ngheo, nhieu bao lu. O moi vung, nguoi ta xay 1 - 2 ngoi nha to that kien co de khi co bao, lu, nguoi dan co the den do tru an.

Tuy nhien, diem dang luu  y la cac ngoi nha nay phai xay that kien co, neu khong se thanh con dao hai luoi.

"Mot so bien phap phong chong lu lut lon: trong phong chong lu, lut nham giam nhe thiet hai nguoi ta quy thanh hai bien phap, gom bien phap cong trinh va bien phap khong cong trinh. Bien phap cong trinh la nham thay doi dac tinh cua thien tai nhu xay dung cac ho chua de dieu tiet lu, xay dung cac he thong de ngan lu tran vao dong bang, tu bo bao ve de dieu, giai phap phan, cham lu… Bien phap khong cong trinh la nham thay doi tac dong cua thien tai nhu trong va bao ve rung dau nguon de giam thap cuong do lu lut, xay nha o co kha nang chiu duoc nuoc lut (chung song voi lu).

(Theo Trung tam Du bao Khi tuong Thuy van TU)

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