() T h o n g tin XWVUTSRQPONMLKJIHGFEDCBA ZYXWVUTSRQPONMLKJIHGFEDCBAA 1 I1 I KHOA HOC XA HOI & NHAN VAN HAl PHONG ~ onmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA A ?, :, ( - 0 ) TSRQPONMLKJIHGFEDCBA 0016 r I SfvI:145l i ~ * Nghj Thanh quoe 09 quyet uy v e ' th f!C t e 't " i cua h i~ n Ban H9i U T h U 'O 'n g v L J n h ijp k in h te ' Hai Phong * M t s o 's u y n ie m N Q IT U I Phat nghi b U c Cd a 'u v e ' v ijn t r ie n ben v iit lg dLJng khai tro n g d ie u huy nguon k i~ n V i~ t N a m * * T im h ie u it nhan ta i Q uy d jn h v L J n g h ie n ngh~ TRUNG TAM KHOA cap cech cec te m th tJ e nuo» tn e n n J" f)o n g at XA xec h9C va ph d jn h at t r ie n pho: HOI & NHAN THANH PHO HAl PHONG f!C A t h v e ' v ie c c t i'u K h o a HQC ph VAN n h i~ m cong 'H f7 J a @ T J a ~ tJ a T J a KHOA HOC Xl HOI & NHAN VAN HAl PHONG oft '" '} TRONG " s6 NAy: LUQC THUAT ZYXWVUTSRQPONMLKJIHGFEDCBA & GIGI THI$U : • Nghi quyet 09 NQrru cua Ban thuong vu Thanh uy v~ thuc hien Hoi nhap kinh te qu6c te tai Hai Phong ITKHXH NGHIENCOU & NVHP : • Mot s6 suy nghi buoc dau v~ van dung khai niern Phat trien ben virng dieu kien Viet Nam GS LE QUY AN • V~ kha nang hinh mot khoa hoc moi v~ ngiroi TS HO SIQUY Ph6 v ie n tr u d n g V i¢ n n g h ie n cuu nguai • Tim hieu each thirc phat huy nguon lire nhan tai b cac mroc Dong A PGS NGUYEN HUY QUY T a p c h i n g h ie n c u u T ru n g Q u o (' • Tong quan nong nghiep, nong thon mroc ta dau the ky XXI MINH HoAI - P G S -T S k in h te • SOng Thai Binh qua trinh phat trien khu vue Tien Lang 15 TItAN DOC THANH & DINH VAN HUY Phdn HOI THAo KHOA HOC qCH v ie n H d i d u a n g h o c ta i H d i P h o n g Sa: • HNXWVUTSRQPONMLKJIHGFEDCBA h ii b Ho~ch Tr~ch TANG N guyen G ia m BA HOANH d o c : B d o ta n g tln h H d i H u n g c ii • Vai tro ngtroi my va ho ngoai voi danh nhan van h6a Nguyen Binh Khiem NHUvANNHA T r u o n g h o N h ii t h a n A n T u , T i e n L d n g THONG TIN - KHXH • & NV : Q u y e t dinh v/v ban hanh "Quy dinh tarn thai v/v xac dinh nhiem nghief ciru khoa hoc va phat trien cong nghe cap ph6 • Mai nha chung cua doanh nghiep mien Duyen Hai Bac VI,l &? HWDlNH TSRQPONML TIN HOAT DONG - KHXH & NV-HP : • Hoi nghi trao d6i y k ie n v~ thong tin KHXH & NY - Hai Phong 32 THONG T IN KHXH & NHAN VAN HAl P H O N G onmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA SONG THAI BINH TRONG QuA TRINH ~ / ~- vue PHA T TRIEN KHU TRAN TIEN LANG BUG THANH v a B IN H vA N HUY· M& dau Thai Binh da tung la song Ian thir hai & Dong Bang Bac BO, chac chan co vai lich Slr phat trien tLJ nhien va kinh te xa hoi mot khu VLJCquan cua dong bang chau th6 song Hong Hien nay, song bi suy tan kha nhanh va lam thay tro to Ian d6i dang ke moi qua khrr co trang tu o n g truorig y tLJ nhien nghia lai Mac tren ca ve khoa du chua c6 dieu dien rong hoc, thuc kien khao Tim tuong goi y can thiet cho nhung nhirng ong y bai viet chl la Nguyen Phong Ngoc da khuyen Thao, khich hcac nghien Giarn doc d6i dong song diroc nhung bien sat k y , bai vier duoc dong hoan tai lieu han che, nhung van de suy nghi biroc dau, Du thi day cung ciru ky hrong trung cac tac giil hoan thay tien va dLJ bao nho tap hop mot so tai lieu roi rac da c6 Do dieu kien trinh bay trang hieu tam sau Xin chan Khoa hoc Xa hoi la earn an va Nhan van Hili bai vier Khai quat dac diem dia chat va dia hinh Khu VLJCTien Lang tao to i mot vai nghin narn & doi sut tay nam met va khong trung true Tay B~c - Dong huang Luoc La gan va dirt gay Diem Tram long Nam Dien song be mat dong De tu dat den be day tren tram phu boi Nghia tram tic h Thai Binh blnh tan kien va dut gay tu6i - Ninh song Giang Van tao va Cac dut gay Dc co huang gan trung true song dong bac - tay nam bang met Phan Binh, va cac xa phi a tay bac song tu6i Tcan co be day khoang Ian be mat dong Toan tan muon Moi diroc phu boi tram lS00-2000m bang trang ChI co khu huyen Tram TSRQPONM duoc VLJCxa Khoi tich cua he tang Hili Hung, tan sorn - giua Dia hinh be mat dam lay - bien * he tang Thai Do San co huang tic h sut tan kien che boi hai he diit gay quan Cac dirt gay Ha Nam tich De tam narn duoi co bien 10 da goc tren mat Tren kien tao hien dai, khu VLJCdtroc khong sau Song Do San, dong tu6i Toan bang Tien Lang tan trai kha rong T S P h a n v ie n H a i D u o n g h o c ta i H fli P h o n g chu yeu va thoai, la dong bang cao trung tich binh tu song O ,S - ,S - bien, m, co - -~. ~== ~ZYXWV T IN K H X H onmlkjihgfedcbaZYXWVUTSRQPONMLKJIHG & NHAN VAN HAl PHONG 33 THONG th~ bi ngap nurrc thuy mat dong bang den 4-4,5 m Cung trieu len cao, nhung co mat cac de cat bi~n c6 va hien Qua trinh boi tu va bang dong Tien Lang, bien 2-3 m, it xung durmg phia bien.TSRQPONMLKJIHGFEDCBA co th~ phan = 1,3 - 1,7), mau ve dai va dQ cao Cac de cat bien nen it ngap lut va la nhung quanh dQ cao dat 4,5 m, dinh (Md he boi su khac tich tu cat chira mroc tap trung dan ctr song bac va ta y bac huyen Tien keo dai km dQC quoc IQ 10 va 500 m den Chung I la cat hat trung keo dai, chieu de cat ph an bo' & phia cac ghla, Tan Tien) = Lang vi tri ph an bo' va huang H~ I: Gorn dQ cao t h a i v t l t h a n n XWVUTSRQPONMLKJIHGFEDCBA p h d n V {U c h a t d e c a t c o : nong VI the tai day thuong ngdrn tang (So dich chuyen h in h De cat c6 & khu Vl!C Tien n6i cao hen dai, tan nam sau cac de cat c6 SI! b o : d a c d ie m phan vat chat, de bao bao ve N6i tren h~ thong kha ph6 bien cac ho dam, la di tich sot lai cua cac khiic uon song c6, hoac cac lach trieu P h a n duoc huang dong 0,5 - 0,2 mm), (xa Khoi 1000m tay bac & tay nam Vat chat cau tao nen he bac - hat nho Lang (Md = 0,1 - 0,25 nau do, vang den xarn sang Thanh mm), chon bot set chiern phan IQc tot ty I~ rat 10%) va i t gap va so, S c it « H~ : Gorn cac de cat xung 500m den 2km, thi tran Tien quanh lang, co chieu dQ cao - 3,5 m, th a p h e n H~ , d in h huang kha dai kha dong deu nr IQn x o n , k h o n g dong nhat theo mot huang nhat dinh Vat chat cau tao nen M chil yeu la cat nho, mau xarn vang, xarn nhat va co Ian nhieu vo voi sinh vat dang so S c , H~ : Gorn xa Tcan xarn vang chiern nhieu ThAng, den xarn nhat 10 - 20%, phan den 2,3 km, chieu cua Van 60 - 70% chira nhieu duoi met xa Hung den km, cac de cat la dong lIc Vat chat chon nam dQ cao Tien = IQc tot, va bQ (Md dong Chieu Lang, tai cac cua chung va gan va Nam 2,5 vuong cao goc Chieu hen 500 m vang, dai cua he chut it voi huang xam nr mm ) nhat dinh Hung -3m, cau tao chu yeu la cat n h o , rnau xarn, 0,1 - 0,05 dai cua chung nhat theo phuong BAc Hung - tay nam thi tran cau tao nen H~ la cat nho, rnau vo so, oc bien ThAng, bac dong Vat chat cao - 2,5 m), xep khong nr vai tram Huang song va Tien Minh chiern H~ : Ph an bo' & cac chung bo' & phia cac de cat phan Tien ThAng true chon long IQc tot va chira it va so, oc bien H~ : Phan bo & xa Vinh den 4m Phuong chat cau tao nen Ian kha nhieu 2 Tudi Cac nang dong M v a tie n tr in b Cac tao, 500 m den km, dQ cao tir vci true long song Van lIc Vat xarn vang, chon IQc tot va • h in h th a n b c a c d e c a t cac de cat co tudi tre dan nhung M 1, 2, de cat co dQ cao giarn H~ 3, 4, de cat co dQ cao tang kien gee nr chu yeu la cat nho, mau xarn nhat, va so oc bien nhat, DQ dai cua chung cua cac de cat gan vuong Tu luc dia bien khong Quang co th~ dao dong dQ cao cua dan theo chung huang lai bien doi tu6i tre dan tudi tre dan Nguyen nhan co th~ chan tInh cua rmrc nurrc bien hoac ket hop ca dan theo 34 THONG T IN K H X H onmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA & NHAN VAN HAl PHONG hai Tuy nhien sir thay d6i dO cao de cat phan anh su thay d6i nrong doi rmrc mroc bien qua khir Khi moi tao, da phan cac de cat nam sat hai phi a cira song va tao mot dai trung narn song song v c i dirong bo H~ duoc hinh vao cuoi Toan tan giua khoarig giai dean dau cua bien rut, sau rno rong Cl!C dai cua bien tien Flandrian DQ't bien lui the hien ro vao khoang - nghin narn truce Sau mire ruroc bien lai dang dan tao dieu kien de s6ng pha huy mot phan de cat H¢ Sau d6 rmrc mroc bien lai thap dan, s6ng vun tao nen cac de cat cua he 2, phan bo' kha sat voi H¢ H¢ va duoc tao co che bien rut va thap nrong doi rmrc bien sau ky bien Ian vao dau Tcan tan: m uon, H¢ duoc tao vao dau Tcan tan muon (den 2000 narn truce) H¢ duoc tao vao gitra Toan tan muon (du dean khoang 2000 - 1000 narn truce) Sau hinh H¢ 3, mire nuoc bien c6 xu the dang cao dan H¢ 3, 4, duoc hinh mire rnroc bien dang cao dan, nhimg bien van lui toe dO lang dong tram tich 16n hon tee dO dang cao mire mroc H¢ duoc hinh vao cuoi Tcan tan muon (dir dean khoang 700-500 nam truce) H¢ moi hinh each mot vai tram nam Tren TSRQPONMLKJIHGFEDCBA c o s a xac dinh cac he thong de cat c6 a tren c6 the dua dirong bo c6 irng voi tu6i khac Bang Bang : T u tii v a c h ie u d a i c a c XWVUTSRQPONMLKJIHGFEDCBA d u o n g b o c o ' k h u V I!C T i e n L a n g H~ duong bCY ciS TuiSi uoc doan (narn) Chieu dai (km) I 4000 II 2000 12,3 III 1000 7,4 IV 500 11,2 V 100 8,2 : T o e d tie n r a b ie n c tla d u im g bo co: Giai doan Bien dO tien (m) TOe dO tien (rn/narn) 2000 - 1000 4500 4.5 1000 - 500 3000 6.0 500- 2500 6.2 10.000 5.0 100 2000 narn qua T H O N G T IN K H X H onmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGF & NHAN VAN HAl PHONG 35 Khcang 2000 narn tro lai day, toe dQ tien bien cua dirong b e TSRQPONMLKJIHGFEDCBA a khu VIlC Tien Lang trung binh khoang 5.0 m/ narn Hien a khu VIlC xa Vinh Quang dang dien qua trinh boi tu rnanh voi to e dQ boi tu kha Ian (14,2m/nam) Bien dQng long dan cua song Thai Binh S o n g XWVUTSRQPONMLKJIHGFEDCBA T h a i B in b h ie n n a y H~ thong song Thai Binh bilt nguon tir vung nui dong bac Cac song Luc Nam, Thuorig, Cau va Duong sau hop hru a gan Phil Lai, each Bien 90 km hai nhanh chinh la song Kinh Thay ca phan va song Thai Binh Song tiep tuc phan nhanh la Thai Binh va Van Dc a phia ta y nam Do San Den khoang Ben Trieu, each bien chirng 48 km, song Kinh Thay phan hai nhanh chinh la song Da Bach va song Kinh T h a y Gan den sat bien, hai nhanh hop hru va roi lai phan luu song Chanh d6 cira Lach Huyen, song Bach D~ng d6 cira Nam trieu, song Carn va song Lach Tray d6 cira Ba Lach Tir narn 1981, dilp dap Dinh Vu, song Carn qua kenh Dinh Vu d6 cua Nam Trieu Ngoai ra, trongIie thong song Bach Dang, can co mot so nhanh nci ngang nhtr Tam Bac (noi Cam va Lach Tray) va mot so nhanh phu khac Truce day," song LUQc noi song Thai Binh voi song Hong gan Hung Yen Narn 1936, song Moi duoc dao (co Ie tren mot nhanh song tll nhien tan) de noi song LUQc voi song Van ue Tir do, song Van Dc tiep tuc phat trien m e rong cira dao sau va mo rong long song, can song Thai Binh tan di rat nhanh Huyen Tien Lang narn gitra hai song chinh la Van Dc va Thai Blnh Dean tir song Mia toi Quy Cao dai 5km da bi boi lap han bai boi LUQ'ng nuoc thuong nguon song Thai Blnh chay ve khong true tiep d6 ducc cira Thai Binh ma phai chay qua song Gua va song Mia VaG song Van Dc roi d6 cua Van Dc Phan I a n mroc song LUQc qua song Moi sang song Van Dc, mot phan nho nuoc song LUQc chay VaG song Thai Binh va thoat bien qua cira Thai Binh Do vay long song Thai Binh cang tra nen hep hon va toe dQ dong chay cang nho, sir bci lang cung cang tang len Song Van Dc co dQ doc nho, uon khuc nhieu, dean nr xa Minh Dtrc den cua Van Dc long song duoc mo rong hon Khu VIlCben Khue, ngarn, te e long song co nhieu go va bai dQ dong chay trung binh 1,2m/s, dQ rong long trung binh 400m , dQ sau trung binh 8m sat cira song, toe dQ dong chay nho hon, long song rong hon Liru IUQ'ngtrung binh nam 506 m 3/s (khoang 16 trieu m 3/nam), chiern 60% t6ng hrong mroc song Thai Binh T6ng IUQ'ng 10 mot mua lu dat cao nhat 294 x 106 m 3, toe dQ dong chay nho VaG thang I I va I I I Song Thai Binh co toe dQ dong chay trung binh 0,6m/s, rong trung binh 150m, sau trung binh 3m, a vung cira song dong chay yeu hon va nong hon LUQ'ng dong chay song Thai Binh chi dat binh quan 73m 3/s (khoang 2,3 trieu m 3/nam) Ve mua In, t6ng IUQ'nglu mot co the len 74xlO m Dong chay nho nhat xuat hien VaG thang I I va III THONG TIN KHXH & NHAN VAN HAl PHONG 36 Hang khoang narn song 13 trieu 10 Ion, thang Van Thai Binh Oc va song d6 bien va VII VIII co d¢ due trung song, bai ngarn va bai boi ngap trieu Trang chiern 75 - 85% va tai hrong bun cat chiern mua cua dong, Van mroc song mot ngay, man Ian nhat, hien thay d6i theo co man cao Tren bien binh nuoc va song trinh Thai hinh trinh xuong trieu day song nen cac dao chan mua mira 10 (Thang Mua Vao thang - 10) tai luong he, n u o c song gieng, cua nuoc tu bien trinh trieu, va chan cao nhat mdi man (dlnh nuoc song vao thang co mot Ian d¢ va chan man) xuat 1-2 gio Tai mot vi tri, d¢ man tang trieu) su xarn nhap co d¢ m a n nho va hai va ba, d¢ man d¢ man cua n u o c song tuong (dinh 90 - 95% t6ng luong ca narn mua Binh d¢ man narn XWVUTSRQPONMLKJIHGFEDCBA 0 g / m TSRQPONMLKJIHGFEDCBA LUQ'ng bun cat nhieu mot Ian d¢ man nho nhat va cac bien trinh sau cac bien ur mat nuoc song nuoc Oc cao nhat Trong 18 ty m Ufn bun cat D¢ due Ian nhat xuat hien vao cac 10 dau rnua va y e u gay bdi lang vung cira song cua song dua chu ZYXWVUTSRQPONMLKJIHGFEDCBA D¢ man khoang man vao sau song theo dang hinh nern Lien quan den dia phan Tien Moi dai km, trung binh km, trung binh 100m, binh 120m, rong rong Vung Trong mot Ian nuoc va dong Binh co toi Lich trien gan lien nhir luan d6i long bo c6 cua nho nguon Phan dinh 11 - 12 song dong cua voi bien cac dong c6 dia bang trieu Tien long Luoc, Mia dai 18km, 18 krn, trung va nhat trung binh rong kha thuan nhat trieu (rnoi Ian va - bien trieu d¢ trieu co kern, nho D¢ song Thai Van Oc va Thai tich cac giai dean thong luc - hinh thai long song, Binh, gan tri cua moi moi quan M gitra cac can cat - d u o n g ky nao, song nao co vai tro tru the deu thai cua song Duong khu vue Tay Nam Do noi rieng, d¢ uon khuc q u y e t d in h , tren anh ve tinh SPOT long Lang phan tich dong c6 d a bi suy tan diroc vi tri cua cuong dan cua song trio Viec phan he voi song mroc v a p h u sa tich dai dai co che d¢ nhat trieu Voi bien d¢ trieu dong gill vai tro thong quan Hoa Luoc co song co' diroc can cu vao phep huang song song ,2 m s ; Song ,6 m s ; tren can binh 2,5 - 3m T h a i B in b su boi tu phat chay co Ian nuoc Ian va Ian n u o c rang) C a c lo n g s o n g noi chung ,8 m s : va ven bo Tien Lang Ian trieu cue dai toi 4m, trung song chay chay chinh ,6 m /s OIIa thang (moi h~ voi hai song 100 m, sau m va dong Ion, mot Ian mroc dong) ban nhat trieu San va quan sau 3m va dong chay cira song Thai ky trieu rong sau 4m 80m, sau 3m va dong Lang Binh, narn 1998 vi tri hien va ban dia hinh, da xac va vi tri cua long song c6 Long song c6 thir nhat (LI) narn Cap Tien, heat dong tich cue c6 thang, phan diroi thuoc Cap gitra Khoi thai Tien Nghla gian khoang bi uon khuc va Quyet 3000 rnanh, Tien, - 2000 ban kinh d6 cira a xa narn Ph an tren song cong rat nho Luc THONG TIN KHXH & NHAN VAN HAl PHONG ca hai song Thai Binh va Van Dc deu hoat dong h o n XWVUTSRQPONMLKJIHGFEDCBA a thai gian d a u , Song Van Dc h e a t m anh Long Dean song Lap, c6 thtr hai (L2) nhap CI!C vao dong khoang thai ke thira dean tren a Phuong hien gian dong 2000 x6m - 1000 narn manh rnanh cua Song Thai nam TSRQPONMLKJIHGFEDCBA a dia phan dtroi Doi xa Tien Long dong ZYXWVUTS heat a 1lI1a sau thai gian hon L 1, doan tnroc Blnh 37onmlkjihgfe Minh, song heat dong c6 bi u6n tich khuc rat manh Long Nghia, Lap u6n Long trien song c6 tlnr ba (L3) mot dean ngan L3 u6n khuc thoai hon song khac rat rnanh, va nhap xoan vao c6 thir ba hoar dong chay rnanh song da trai qua pha heat maio Trong song cira song chiu can manh tac dong, h6a thuy each lam can dao song giao narn truce cung dong song pha tan, dao song sau song chung nhung dieri narn voi tnroc, rat rnanh, ADN, cua thuc sau d6 song H6a chat phat heat dong rnanh song u6n Sau mot thai gian heat dong, n6 lai manh hen vao khoang va tra ep nr phia tru the Thuc tay nam thong qua hinh pheu lai cira, ngiroi lam 1936 (la song Thai cira Van mo loe ca hai phia Qua h6a, song da can thiep te, ca hai len Cira song va dan den bi boi can, qua trinh 500 va da buoc vao dau pha suy tan cu6i cung Thai Binh mat d~ giai quyet van de loi the c6 te b] suy tan vao khoang tu nhien da dien cua cac dong Van Dc) K~ nr d6 song Thai song Thai Blnh va Van va mot pha suy, pha dau thinh va pha sau suy tan, nr cai tao lai dong Binh nhip true hon tram hoac Thai pha tan Theo a doi - 500 voi t h a i ky suy tan song 1000 narn, voi mot pha thinh sang manh dong vao narn suy tan c a n g nhanh cua dong dong Yen Ha NOi Con Moi Moi chu ky thang a 1000 cau sang vi tri gan nhu hien cua qua trinh tro VI!C xa Khoi a phi a dong xa Dean tai khu lay h~ truce chuyen gan nhtr dang den Hung chuyen cac khuc xcan Van Dc heat tac dong 1000 - 500 phai khoang bi cac de cat tre moi tao deu Dc it chiu B in h tai vi tri gan m oi narn truce, bang hien "cat cong" Sau bi suy tan, dong trinh ngan lay L2 c6 h o n tao nen hlnh dong suy tan, tao nen h e u6n cong duong voi Ll thi tran, dean ke thira tren L2 Sau L2 suy tan va uon khuc tra lai, dong Binh chung voi L2 tai phia Nam c6 mot chung d~ buoc sang va Van Dc luan d6i dieu nay, song Thai Binh c6 ve tan lui k h a nhanh chu Song k y maio a Nhtrng bien SI! pha thinh vira trai qua pha thinh, cO' gan Dc khoang thinh thi song bat dau chuyen 70 nam qua, k~ tir Mci la het sire to Ion, VI ur vi tri thir hai cac song Bilc K y , chi Hong, n6 gio ta c6 th~ c6 mot Qua Khir, da tung mang chi la mot cai nhin lach khac song hen nho Neu ve cuoc ten cua ca mot he thong khong co sir kien doi cua mot dong song, mot dong bang song chau song Moi, Ian th6 rong Ian 3.3 Cac lach trieu tan Narn sau cac de cat deu c6 cac dai dat trung dam pha (lagoon) Theo thai gian, chung thap va lach trieu, cau tao urong bi boi can dan va mot so' lach trieu nr cac c6 d~ lai • 38 THONG TIN KHXH & NHAN VAN HAl PHONGonmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA cac dau vet diroi dang cac muong lach chay song song vci duong bo Phan tich anh ve tinh thay ding co hai lach trieu c6 can de lai dau vet ro Lach thir nhat narn TSRQPONMLKJIHGFE a phia bac xa Tien Minh, phia de cat - dirong be c6 1000 nam phia nam xa Tien Minh, tr u c e Lach thir hai narn a a khoang giua dirong bo c6 1000 nam va 500 narn tnroc Hai lach xua co te kha sau rong, co kha nang gan noi thong song Van Dc voi Thai Binh Trong qua trlnh duong bo Ian phi a bien, chung dan bien mroc, ngot va tra phu hru cua song Thai Blnh, mot vai noi, lach trieu bi ngot hoa nam sat cac de cat cao, rat thuan loi cho dieu kien song quan cir cua nguoi Chung can tao nen su giao hru bang duong thuy pham vi vung dat narn gitra hai song Ian Ket luan Trong qua trlnh boi tu nghin nam qua cua dong bang Tien Lang, song Thai Binh nhieu Ian hoar dong manh, suy tan va de lai dau vet cua long song c6 tao cac deli trung thap, nhieu ho dam Khi heat dong tich Cl!C, chung teli phu sa cira song boi tu nhanh va tao nen cac de cat chan cira va roi chinh cac de cat phat trien M thong boi tan lach cira Ben canh cac lach song tan, can co cac lach trieu tan ma cuoc doi cua rnlnh, chung co hie tro cac lach song phu hru ciia dong chinh Thai Blnh Co the noi ding, qua khtr khong xa, song Thai Binh la duong giao hru noi thuy het sue quan trong, VI ur cfra song deu co the nguoc dong ve phi a tay bac theo song Luoc vao song Nam Dinh va den Ha NOi va cung de dang ngucc ve phi a tay bac len song Duong, song Cau Neu co mot thuong ben narn a tren song, gan cira Thai Binh thl "vung hap dan" cua no, noi theo ngon ngn hien nay, bao trurn len toan bo hru Vl!C cua he thong song Hong va song Thai Blnh Chinh su bat dau suy tan ur nhien cua song la de dao song Moi va sir doi song Moi lam song Thai blnh tan di cang nhanh Viec da gay nen mot so tac dong quan trong, co d gia cuong 10 tren he thong song Thai Blnh, tang cuong sa boi Iuong vao cang Hai Phong va nhiern man tren song Thai Binh • ... tro lai day, toe dQ tien bien cua dirong b e TSRQPONMLKJIHGFEDCBA a khu VIlC Tien Lang trung binh khoang 5.0 m/ narn Hien a khu VIlC xa Vinh Quang dang dien qua trinh boi tu rnanh voi to e dQ... lang cung cang tang len Song Van Dc co dQ doc nho, uon khuc nhieu, dean nr xa Minh Dtrc den cua Van Dc long song duoc mo rong hon Khu VIlCben Khue, ngarn, te e long song co nhieu go va bai dQ dong... quan 73m 3/s (khoang 2,3 trieu m 3/nam) Ve mua In, t6ng IUQ'nglu mot co the len 74xlO m Dong chay nho nhat xuat hien VaG thang I I va III THONG TIN KHXH & NHAN VAN HAl PHONG 36 Hang khoang narn