DSpace at VNU: On the sedimentation and erosion on Huong river segment crossing over Hue city

VNU JO U R N A L OF SC IEN C E N at , Sci , & Tech., T XIX, N01, 2003 ON T H K S E D IM E N T A T IO N A N D E R O S IO N O N H U O N G R IV E R S E G M E N T C R O S S IN G O V E R H U E C IT Y N g u y ê n T h a n h Son, T ran N goe A nh D e p a r tm e n t o f H y d r o M e te o r o lo g y a n d O c e a n o lo g v C o ile g e o f S c ie n c e , V N U A b s t r a c t : H ue City is a vvorld c u ltu r a l tre a su re and one o f V ie tn a m 's w ell* known tourism centers The unstable water flow has caused erosion and sedimentation belong to both Huong river banks, specially on the river segment Crossing over H ue City vvhich are problem s m ust to be c o n tro lle d fo r re tu rn in g wonderful spectacle of Hue, a small pretty city in the middle of Vietnam Country The study is carried out with many difficulties in collection of hydrological data, it seem s that up to novv there were almost no survey vvorks on sedimentation and erosion of tho Huong river Thereíore ihe study results is setting up the base of continuous studies on the progress of the river Base on the surveyed d a ta a n d c a lc u la tio n the so ftw a re to tre a t and c o n tro l a ll collected data of elevation m easurement and topographical map producũon of riverbed have been built up the present of sedimentation and erosion occurređ in tho Huong river segm ent Crossing over Hue c ity and its consequences has been described preliminarily, then withdrawn some suggestions on the main solutions for minimizing sedimentation and erosion K ey w ords: S e d im e n ta tio n , e ro s io n , r iv e r b e d In tr o d u c tio n T h e s e d im e n t a t io n and erosioiì p ro cesses h a v e long b e e n o f in t e r e s t in th(‘ field o f m o r p h o l o g y t o i n v e s t i g a t e t h e c h a n g e s of r i v e r b o d a n d b a n k e r o s i o n w i t h th o flow reg im e S t u d ie s of th o sc processes have c o n tr ib u te d g r ea tly to our u n d e r s ta n d in g o f th e r e la t io n s h ip b e tw e e n rivor r ev olu tion p r o c c s s and w a te r flow a s w ell a s so c io -e c o n o m ic a c t iv it ie s on th e rivcr b a sin In r e c e n t y e a r s , m any r e s e a r c h e s on tho m o d e llin g of s e d im e n t tra n sp o rtn tio n in th e river h a s becn composed, and most of them focuscd on the problems in the larger river systems su ch a s Red river or M e k o n g riv er but th er e w as verv f’(ầw o n e s ĩo c u s e d on th e rivers in th e M id d le of V ie tn a m A lth o u g h m o d e llin g is now b eco m in g th e very c h e a p a n d effe ctiv e m ethod to s tu d v an d Torecast th e hyd ro log ical p r o c esses but w e a lso n e e đ to in v e s tig a te tho actual situation as vvell a s to m easure real data using for calib ratio n and v e r iííc a tio n of th e m o d e ls , and top ograp hical da ta are n e e d c d to in p u t o f th e m odels d u r in g r u n n in g 011 On the s e d i n ie n ta t i o n a n d erosion on ĩ lu o n g ri v e r 83 H u e c ity is a w orld c u ltu l tro asu re and one o f V ie tn a m 's w e ll k n ow tourism c e n tre s F o r a lo n g p e r io d , a n u n p la n n e d đ e v o lo p m e n t u n s u it a b lc la n d a n d w a tc r US(* o f th e c a tc h m e n t a re a a n d n in n n g e m e n t o f s o c io -e c o n o m ic a c t iv it ie s h a s causecỉ p o llu t io n a n d đ e t r im e n t a l im p a c ts