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ltr€ high cost of tfie Provlsion of storD thaLnage ln u!b.'r aleat<br />
places a heavy predlu! on th€ ef,flcient hydrauuc dorlgln of flow<br />
condutts. A natheuatlcat noilel for the convelglon of ralnfall lnput<br />
to a design flow at so[e polnt 1n a sewer syst€D ls one c@ponent of<br />
the essentLal aLesllm process, anil slnce there iE gleat potentlal 1n<br />
construction cost savr.flgs, nuch energv has been expended over tie lasl<br />
faw years towarals the develolnen! of euch noalelg,<br />
The rajnfall-runoff process ln a fully-sewereal utba:r catchleot Dry be<br />
conveniently alivlaleal lnto two! an above-gl.olmal phase coDp!1slng<br />
prlnclpally hydroloqical phenolrena and a below-grounal phaEe whlch la<br />
prlEarily hydraulic, In the past, the teatlng of uoalela against f1e1dalata<br />
has requl-red slDulation of bottl tlese phases, ana !t has never<br />
been certaln as to nhethe! a correct anatrei has been achieved by tr'o<br />
corlect slnulatlons or tlro lncorrect, but conpengating, alEulatlons.<br />
!'or this reason, the 1o91Ca1 step :in the aleveLopnent of noilels haE<br />
been to isolate t}Ie one phase fror0 t-lrr otl.er, and to col.Iect f1e1d data<br />
at tie intelface bet*een the tro phases (or wh€re tbe runoff goes<br />
underglound) . To th16 end, several regealch gtoups engaged ln Dodel<br />
developBenC have eribalkeal oD data coll-ectlon proglauDes !t thls pha6e<br />
bounalaly.<br />
An lnternational wolkshop iras held at the fnstltute durlng April ]978<br />
to bting together these sevelal groupa f,or a conc€ntlated attack on<br />
both tie anal.ysis of, t}|e dala from the dlfferent reseatch catchDents<br />
and to !ev1e$ the porfoleance of sevelal dtff€r€nt oodelUng sttategies.<br />
ttre eorkshop paiticLpant€ (see Plate L) eere as follotrs:<br />
J A van den Belg<br />
GAven<br />
,J FaIk<br />
J NLenczynowlcz<br />
P Jacobsen<br />
R G Mein<br />
Lfssell0eetpoldels Developroent Authotlty<br />
I,elystad<br />
rhe Netherlarals<br />
Departnent of Wate! Resources Eflglneell$g<br />
Universlty of lund<br />
Sl,eden<br />
f,eparteent of Sanltary Englneerlng<br />
fechnical UntveBtty of DenDark<br />
Lyngby<br />
DenEark<br />
Depalloent of Clv1l Engineellng<br />
Monash Unlvelslty<br />
llelbourne<br />
Australla