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t<br />
I<br />
I I = sinul-atlon run<br />
2 = optlmisatlon lun (on lndlvtduat events)<br />
I<br />
I<br />
I<br />
I<br />
I<br />
t<br />
I<br />
I<br />
I<br />
t<br />
I<br />
I<br />
I<br />
t<br />
I<br />
I<br />
3 = optf lsaglon rdfi (on combln6d events)<br />
4 - napplng run (on indivlilual evencs,<br />
5 = napplng run (on comblned events)<br />
ObJective functions: There are 6 choices of objective funcrions, whrch<br />
are deslgnated by the followtng optlons:<br />
Optlon<br />
t;<br />
2:<br />
3: peak estimation + I pEAKoBs - PEAKMoD<br />
l/pEAKoBs x Looi<br />
4: volume estinarion . I vOLOsS - vol,!rcD<br />
l/voLOBs x tOOr<br />
5: tlne to peak . flpOAS - *a!|Oo<br />
6: As I. but onty over the range QOSS t \*pm"OeS<br />
Optj.on I is a traditional least squares function. Option 2 ls sinllar<br />
but applles nore weiqht io the hlgh flows than to the low flows of a given<br />
hydroglaph. In practlce, the6e tro functions are very highly cotrelat€al.<br />
Options 3 and 4 relate to hydrograph peak and hydrograph volume respectively.<br />
Further optlons could easily be accotunodated.<br />
4. I4ODEL OPTIONS<br />
Objeccive Function<br />
',/fgo"a<br />
rntegral square Ertor, Ieast squares + I :ieo""-e"oo),<br />
* aoo.<br />
biasseal ]easr squares + | X lQo"",<br />
-Qroo, -/:qo""<br />
, loot<br />
A nunber of different 6ode1 optlons tnay be specj-fied. The ratnfallrunoff<br />
model is divided into teo, e loss suboodel (choice of B) and a<br />
surface routing subGlodel (chotce of 6). A detailed description of the<br />
partlcular models nay be found else$here. There are three optj.ons which<br />
deteltnlne the model used, 2 retated to the loss submodel and I to Ene<br />
surface routl,ng nodel:<br />
I,oes nodel,:<br />
optj.on<br />
1 CONS"ANT CONIRIBUTING AREA<br />
2 CONSTANT PROPORTIONAL<br />
I.OSS<br />
(PAVED AREA}<br />
3 CONST. PROPORTIOML<br />
I,oSS<br />
(IVTAL AREA)<br />
No.of<br />
Paras. Paraneter Nanes<br />
2 DEPSTOG AREA<br />
2 DEPslpG, CP<br />
2 DEPSTOG,CP<br />
rri