The figure below (Figure 1-15 in the book) Intensity-Duration-Frequency (IDF) shows curves for Houston, Texas. What is the rainfall intensity (in./hr) for the storm with a 2 hr duration and return period of 10 years? Rainfall intensity (in./hr) 20.0 15.0 10.0 8.0 6.0 4.0 2.0 1.0 0.8 0.6 0.4 0.2 0.1 0.08 0.06 0.04 0.02 5 10 Houston, Texas, 1910-1951 Note: Frequency analysis by method of extreme values, after Gumbel (1958) Period return (yr) 100 15 20 30 40 60 (min) 2 Duration 3 4 5 6 8 10 12 18 24 (hr)

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Q: DA River in the Thunder Bay area experienced peak floods of 2600 ft/s and 3000 ft³/s respectively…

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Probability, risk and uncertainty analysis for hydrological design

It gives a framework that is financially critical for finding the exceptional designs of hydrological systems with a reduced cost in total inclusive of the project cost and the disaster mitigation cost. But there would be hardly any assessment of a decent quality damage function. Hence, errors in demonstrating the hydrologic events, incorrect model parameters, and so on may occur. Here, we will discuss a specific hydrological design that of a detention basin for studying and understanding the risk-based procedure, uncertainties, and probability analysis by following a systematic framework.