DSpace at VNU: Simulation of changes of red river system profile using hec-6 model (Da river reach from Hoa Binh to Thao...
VNU JO U R NAL F S C IE N C E , Nat , Sci & íe c h , T XIX, N ọ l 2003 SIMƯLATION O F C H A N G E S OF RED RIVER S Y ST E M P R O F IL E ƯS1NG HEC-6 M ODEL (Da r i v e r r e a c h from Hoa B in h to T h a o - D a c o n A u e n c e and Red r i v e r r e a c h from T h a o -D a c o n A u e n c e to Ha N o i) N g u ye n T h i N ga D epartm ent ofHyd.ro Meteorology a n d Occanoỉogy Collcge o f Science, V N U A b s tr n c t ỉ loa B in h re s e rv o ir was b u ilt in ìm p o rta n t d u tic s th a t are g c n c tio n ỉ)a r iv c r to c a r r y o u t tw o top e le c tr ic ity and flo o d p re v e n tio n for ìow ]ands S incc o p o tio n , Hoa B in h re s c rv o ir has bcen b r in g in g about v c ry big uscíuỉnesses, but also has bcen c a u sin g u n fa v o u b lo ch a n g e s, such as d e p o sitio n in th e ro s e rv o ir, local scour in lo w e r o f th o dam and (lis s e m in a te d scour to w a rd s lovvcr K s tim a tio n , s im u la tio n and p re d ic tio n th c s c rh a n g e s to lim it dam ages a lw a y s are pressing and necessary p ro b le m s M a th o m a tic a l models a rc e ffe c tiv e and eco n o m ir tools to solvp these p ro b lo in s I1EC-G is a o n o -đ im iỉn s io n a l m ovable b o u n d a ry opon c h a n n e l flo w n u m tíric a l m odcl dosigned to s im u la te and p r iid ic t changcs in r iv o r p ro íìlc s ro K u ltin g from scour a ru l/o r d o p o s ilio n ovcr m o d c tc tim c pcriods T liis p a p cr s tu d ie s and a p p ỉio s 11KC-G lo s im u la tc ch a n g e s o f D a r iv o r p ro lìlc (reach from ỉ loa Binh t.o Thao-Da roníluencc) and Red riv e r p ro íílc (reach from T h a o -D u conílu ence to ll a N oi) T h o r c s u lts (>f m odel c a lib r a tio n and v e rific a tio n show th rtt IIE C -6 m odel vvith th o selected sot o f o p tim a l p a m e te rs can use to s im u lu to changes o f Red r iv c r system p ro íìlc in th o ĩu tu ro w ith accoptahỉo accuracy T h e rc s u lts o f Red r iv c r bed chang!! s im u la tio n u s in g the s o i o f solccteđ p a m e to rs ; in it ia l c o n d itio n is Red r iv e r bcul, w h ic h s u rv e y e d in 1992; u p stro a m co n ciitio n s a rc ty p ic a l discharge proccss (avcĩragc ty p o o f periocl 1988 1998) a i h y d ro lo g ic a l s ta tio n s : Hoa B in h , Y en B a i, V u Q u a n g , T h u o n g C a t and đ o w n s tre a m c o n d itio n s is ty p ic a l 8tag