By Terry Sturm
* A entire assessment of stormwater and wastewater assortment equipment from worldwide, written b prime specialists within the box * contains distinctive research of method designs, operation, upkeep and rehabilitation * comprises fresh study advances and private laptop functions
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Additional resources for Open Channel Hydraulics
Example text
VewYork: \lcCraw,llill. 1999. l. r) Flow of riveraroundbridgepiers. 1r) Movementof flood surgedownstream. Obscner ( I ) Sranding oDbridge. (2) ln boar,drifting. ( l) Standing on bank. (l) Moving\\ith surge. 2. lc. Explainyour answer. 3. The river flow at an upstreamgaugingstationis tneasured to be 1500nrr/s,and at anothergaugingstation3 km downstream, rhe discharge is nreasured to be 750 mr/s at the sameinstantof lime. Is it rising or falling? 4. whichextends acrossthelot widthof 30 m. Rainfallis occurringat a uniforminrensity of l0 cm,4rr If the detentionstorageon the pavedsectionis increasingat the rateof 60 m],/hr,what is the runoff rate into the inlet grate?
12. Thc lonSiludinalvclocity. i and the shcarvclocity. Develop the dimcnsional anallsis for thc point veloclty. r. 13. /:the velocity of lhe approachflow. Why *as the fluid dcnsity not includedin the list of variables? weir. 0, is a function of lhe headon the \\'clt crest. 14. The dischargeover a sharp-crested H: the crest length. p: surfaceleng. Cirry out the dimensionalanall sis using p. sion. o; and gravitationalacceleration. L, how would you aller the depcndentlI group? 1 ENERGY Dlrl-INITIONOF SPECIFIC 'fhe concept of specificenergyas introducedby Bakhneteff ( 1932) has proven to be rcry uscful in the analysisof open channeltlow.
Do n l ! o n c c r j r i c a ld . p t h e x i s r sa n d Q L = Q U . , l f r s i n c r c a s i n gr ,h c nr h c r r t r \ i n l ! n r \ a l u e o I t h c c o I l ] p o u n dc h 3 n n e lF r o u i l en u m b e r F . " o . O1-,for the possibleca-scof ntultiplecrrtjcaldcpthsfor the g i\ en 0. Oncc borhO U and Ql, arc known. thcn decisjonsare madeatxJUIlhc c\ rstcnLe of onlr a Io\\r'r crilical dcpth. of only an upper critical dr'prh,or of both. eloped for weirs accountsfor ticir continuing popularity as flow measuringclevlces.