Author(s): Yeou-Koung Tung

Linked Author(s): Yeou-Koung Tung

Keywords: No Keywords

Abstract: Chance-constrained models for storm sewer systems are applied to themain sewer trunk in Goodwin Avenue basin at Urbana,I1linois.The variousconditions considered by the models are:(a)three distributions for totalincoming overland runoff(normal,lognormal,and Fisher-Cornish asymptoticexpansion),(b)spatial correlation between incoming runoffs,and(c)non-parametric ways of analyzing hydraulic uncertainty.The design require-ments are:(1)3.5 feet of maximum depth cover,(2)2.0_fps of minimumvelocity,(3)10.0 fps of maximum velocity,and(4)0.95 of minimum per-formance reliability.Physical information and pertinent data requfred bythe models can be found elsewhere(Wenzel et al.,1979).When spatialcorrelation is considered,an exponential variogram model with a range of1000'is assumed.Solution technique used for solving chance-constrainedmodels is the generalized reduced gradient method(Lasdon and Warren,1983)。Unit excavation cost and the pipe cost function used are obtianedfrom Wenzel et al(1979)for class III pipe.

DOI:

Year: 1987