One of the most laborious tasks in the design of Storm Water Drainage Systems is the definition of parameters, such as the diameter and longitudinal slope, among others, for each sewer pipe, because those are what will set their maximum flow capacity.

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Urban Drainage Systems comprise a number of elements, from the stormwater catching system (drainage inlets) to the pipes and channels that allow the conveying and discharging of the precipitated rainwater to natural and artificial channels, for its free runoff.

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One of the relevant features of DREN-URBA, our Software for stormwater drainage systems design, is the definition of the basic data that will be used to create the different “hydraulic” objects available inside the application.

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In Urban Drainage Systems design, estimating the Maximum or peak stormwater flow through the Rational formula requires the engineer to determine, for a given frequency or return period, the value of the rainfall intensity for a given Time of Concentration.

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The approach for modeling Urban Drainage Systems with DREN-URBA is very similar to what would be done in the manual calculation: establish the hydraulic characteristics of the streets in the studied sector for, depending on the results, controlling the flood spread through the installment at adequate points in storm drain inlets that allow stormwater catchment.

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One of the advantages of DREN-URBA, our Stormwater Drainage Design Software, is the incorporation of a library with different types of Storm Drain Inlets, so that the design engineer only has to select the one that best suits the particular conditions of each design.

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