Download (2026Kb) - NERC Open Research Archive

More documents

Recommendations

Info

68 APPENDIX B . ITRBAN BYI'ROI"OGY MODELLING PACKAGE I. INIRODUCTTON fhe Urban Hyilrology ld€l.Iing Packaqe (UtsuP) has b€en developed at the Jnstltute for the speclfl.c purpose of perf,otmlng modelltng assignnents on raInf,all-lufloff data fronr urban subcatchnents, It inelacts wlth a custom-bullt data base syst€n, phich retriev€s la1nfall and runoff data fo! any number of specifled events on a glven catcbrnent. A varlety of diffelent modelltng a6sigDnents can be perforneal, uslog a cornpreh€nslve iange of modeLs. ltre ilala speclficatlons, nodelli"ng asslgnnents and nodel optlons are all-scussed under separate headings, which are folloued by detail6 of hoir to feeil the xun speclflcations lnto the package. Flnall-y, there i.s a sectlon whlch descllbes the structure of the package nh1ch, althotrgh no! a prelequlslte to the runnlng, ls included 6lnce a passlng knowlealge ls hefPful. 2. DATA SPECITICATIONS l'he data base ls set up Such that up to 18 events on any catchlrent may be stored. Thete is a ll!ft of 2M oldinates pe! event. (Any tlme interval alata nay be useil). Only one catchnent day be nonrlnateal in any si"ngte package run, but any nurober of events up to the l1mlt of 18' Pieclse aletalls on how to feed tn thls lnfolmation nay be found under the run specif lcatlons sectl,on. 3, y99II4II9_49gI9rssNr!. Ihere are tlEee modes in rrhich the package nay b€ run: slnulation, optlDisatlon and error surface baPpLng. Sinulation: speclfleal events are nodelleal uslng uP to lO sPeclfled Bode] paratretels. ootlmisatlon: certain noilel lx|raDetels oay be alesignated to be allowed 6--il6JTi€rti" specified linits. A Rosenbrock optlntsatj.on routlne is useal to ileternine the set of oPt'llDun pataneter vaLues accolding to the Elntnisatlon of sobe aleslgnated objectlve functlon. There is a further optl"on to oPtitnise the Dodel on inativldual sPecified events or to derive a global opLlnuh on coribLned events. E!ro! surface mapPlnq: 'he interrelationship of celtain sPeclfled paralriters day be lnvestlgateat by Plotllnq a 6 x 6 grid of, objectlve functlon values on t$o axes relati.ng to the Palamelers speclfLeCl. contouls llay then be dlawn by hand to obtaln an error response surface. If 2 paranetels are specifleal the! 1 such plot !,i1I result, if 3 then 3 plots witl result, if 4 then 5 Plots ltill resuLt, anil so on. As vtith the optinlsation calre' dapplng Bay be done on indivldual events o! on eomblned events. Asslqmen! option: cholce of asslgrlllent optlon is determln€d by specifyirlg as follows: I I T I I I t I t I I I I I I t
t I I I = sinul-atlon run 2 = optlmisatlon lun (on lndlvtduat events) I I I I I t I I I t I I I t I I 3 = optf lsaglon rdfi (on combln6d events) 4 - napplng run (on indivlilual evencs, 5 = napplng run (on comblned events) ObJective functions: There are 6 choices of objective funcrions, whrch are deslgnated by the followtng optlons: Optlon t; 2: 3: peak estimation + I pEAKoBs - PEAKMoD l/pEAKoBs x Looi 4: volume estinarion . I vOLOsS - vol,!rcD l/voLOBs x tOOr 5: tlne to peak . flpOAS - *a!|Oo 6: As I. but onty over the range QOSS t \*pm"OeS Optj.on I is a traditional least squares function. Option 2 ls sinllar but applles nore weiqht io the hlgh flows than to the low flows of a given hydroglaph. In practlce, the6e tro functions are very highly cotrelat€al. Options 3 and 4 relate to hydrograph peak and hydrograph volume respectively. Further optlons could easily be accotunodated. 4. I4ODEL OPTIONS Objeccive Function ',/fgo"a rntegral square Ertor, Ieast squares + I :ieo""-e"oo), * aoo. biasseal ]easr squares + | X lQo"", -Qroo, -/:qo"" , loot A nunber of different 6ode1 optlons tnay be specj-fied. The ratnfallrunoff model is divided into teo, e loss suboodel (choice of B) and a surface routing subGlodel (chotce of 6). A detailed description of the partlcular models nay be found else$here. There are three optj.ons which deteltnlne the model used, 2 retated to the loss submodel and I to Ene surface routl,ng nodel: I,oes nodel,: optj.on 1 CONS"ANT CONIRIBUTING AREA 2 CONSTANT PROPORTIONAL I.OSS (PAVED AREA} 3 CONST. PROPORTIOML I,oSS (IVTAL AREA) No.of Paras. Paraneter Nanes 2 DEPSTOG AREA 2 DEPslpG, CP 2 DEPSTOG,CP rri
Page 1 and 2:
- I I I I I I I I I T I I T I I I I
Page 3 and 4:
I I I I I I I I I I I I I I I I CON
Page 5 and 6:
I I 'l I I t I I f I I I t I I T I
Page 7 and 8:
I t I I I I I I I I I I I I I ltr
Page 9 and 10:
T -l 'l fhe $ork6hoP confin€tl lt
Page 11 and 12:
I I 't t t I T I t t I I I I I I t
Page 13 and 14:
I I "t 500 I I I t I I I I t I I I
Page 15 and 16:
I I -f t T I I T t I T I T I t I I
Page 17 and 18:
I t t T I I I T t I t l I I I I I I
Page 19 and 20:
E t I I I T T I T t I I I I T I I I
Page 21 and 22:
I t I I I T I r t I I I t t I I I I
Page 23 and 24: I lr ll lr ll ll t I t I I I t I I
Page 25 and 26: I t I I I I I I I t t shlch l,r cqu
Page 27 and 28: I t I I I I I I I I I I I t T I I I
Page 29 and 30: t I 't L - 1.n9th of tlo{ 1r !, k ,
Page 31 and 32: I I I t I I t I I I I I I I I t I I
Page 33 and 34: I I t I I I I t r t I I I I t t I I
Page 35 and 36: t t t I I I I I I I I t I I I I I I
Page 37 and 38: I t I I I I I I I I I I t I t I I I
Page 39 and 40: I I I I I l I I I I I I t I I t I I
Page 41 and 42: I I I I I I t I I I I I I I I t I I
Page 43 and 44: t I I I I I t I I I I I I I I I I I
Page 45 and 46: t I I I I I I I I I I I I I I I I I
Page 47 and 48: I I I I I I I I I t I I I I t I t I
Page 49 and 50: I I I I t I t t I I I I I t I t I I
Page 51 and 52: I :;; i g8 @aon 66aO da6o6n q1fq6o^
Page 53 and 54: HE ! 3d g E '.6 +f lfri?ilol irooor
Page 55 and 56: I I t I t I t I I t I t I I t I I I
Page 57 and 58: I I : I I I I I I t I I I t I I I I
Page 59 and 60: I t I I I I I I I I I t I t t I I I
Page 61 and 62: I I I I t I I I t I I t I I I I t I
Page 63 and 64: T I I T t I T T T T T T I T I I I I
Page 65 and 66: I I I I I I I T I I t I ! REFEREIEE
Page 67 and 68: I T I I I I t I I I I I I I I I I I
Page 69 and 70: T I I I t t I I t I t T I I I I I I
Page 71 and 72: II .l I 't I t I I a: I I I --^-.r-
Page 73: I I I I t I T I I I I t I I I I I I
Page 77 and 78: I I t I I t I t t I t t I I I I I 5
Page 79 and 80: t I I I I I I t .t t I t I t I I AP
Page 81 and 82: I 't I I I I I I I I I I t I I I I
Page 83 and 84: t I 'l t I I I I I I I t t I I I I
Page 85 and 86: t 'l 't I I I I I I I I I t I t I I
Page 87 and 88: I 'l 't t t I I t I .l I I I I I I
Page 89 and 90: I 't 'l ' ?lrl I I t I I t t I t t
show all

Download (2026Kb) - NERC Open Research Archive

Create successful ePaper yourself

Delete template?

Save as template?