Analysis of Urban Stormwater


Using the “Basic L-THIA Spreadsheet”: 

• We will assume a site in the city is about 200 acres, (C soils) 

• Scenario #1: Assume the land use of that site is all Forest/Woods before it is developed. 

• Scenario #2: The site is now developed, based on the current land use, let’s assume of the total area is made up of: 

High Density Residential @ 65 % and Commercial @ 35% (you’ll have to convert these landuses to acres to run L-THIA). • 

Summarize in a table the outcomes of both scenarios #1 & #2 and determine the percent increase seen with the following: Stormwater Volume (in acre-ft), N, P, TSS, and Bacteria (remember units) 

• Do some research on Stormwater BMPs and Low Impact Development (LID). Provide a short write up (one page) on the types of practices that could be used to reduce urban stormwater impacts. 

website will help

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