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plate I (r. I{ORXSIIOP PI'IRTIClPANTS ro r. ) Jan van den Berg. FrrsEeIL Nein, Geratd Ven, Ian sakin, Chrls KiCd tc r.) Per Jacobsen, John Packnan, ian Faik / Jan N!enc'1no lcz, WoIfqang I l. I I I I t l I I I I I I I I I I I
I t I I I I I I I I I I I I I ltr€ high cost of tfie Provlsion of storD thaLnage ln u!b.'r aleat places a heavy predlu! on th€ ef,flcient hydrauuc dorlgln of flow condutts. A natheuatlcat noilel for the convelglon of ralnfall lnput to a design flow at so[e polnt 1n a sewer syst€D ls one c@ponent of the essentLal aLesllm process, anil slnce there iE gleat potentlal 1n construction cost savr.flgs, nuch energv has been expended over tie lasl faw years towarals the develolnen! of euch noalelg, The rajnfall-runoff process ln a fully-sewereal utba:r catchleot Dry be conveniently alivlaleal lnto two! an above-gl.olmal phase coDp!1slng prlnclpally hydroloqical phenolrena and a below-grounal phaEe whlch la prlEarily hydraulic, In the past, the teatlng of uoalela against f1e1dalata has requl-red slDulation of bottl tlese phases, ana !t has never been certaln as to nhethe! a correct anatrei has been achieved by tr'o corlect slnulatlons or tlro lncorrect, but conpengating, alEulatlons. !'or this reason, the 1o91Ca1 step :in the aleveLopnent of noilels haE been to isolate t}Ie one phase fror0 t-lrr otl.er, and to col.Iect f1e1d data at tie intelface bet*een the tro phases (or wh€re tbe runoff goes underglound) . To th16 end, several regealch gtoups engaged ln Dodel developBenC have eribalkeal oD data coll-ectlon proglauDes !t thls pha6e bounalaly. An lnternational wolkshop iras held at the fnstltute durlng April ]978 to bting together these sevelal groupa f,or a conc€ntlated attack on both tie anal.ysis of, t}|e dala from the dlfferent reseatch catchDents and to !ev1e$ the porfoleance of sevelal dtff€r€nt oodelUng sttategies. ttre eorkshop paiticLpant€ (see Plate L) eere as follotrs: J A van den Belg GAven ,J FaIk J NLenczynowlcz P Jacobsen R G Mein Lfssell0eetpoldels Developroent Authotlty I,elystad rhe Netherlarals Departnent of Wate! Resources Eflglneell$g Universlty of lund Sl,eden f,eparteent of Sanltary Englneerlng fechnical UntveBtty of DenDark Lyngby DenEark Depalloent of Clv1l Engineellng Monash Unlvelslty llelbourne Australla
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T I I T t I T T T T T T I T I I I I
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I I I I I I I T I I t I ! REFEREIEE
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II .l I 't I t I I a: I I I --^-.r-
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t I I I = sinul-atlon run 2 = optlm
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t I I I I I I t .t t I t I t I I AP
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I 't 'l ' ?lrl I I t I I t t I t t
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