Green Roof Runoff Calculator

The excel based spreadsheet is available for download from the downloads and calculators page of the green roof blocks website.
Green roof runoff calculator. Estimates are based on local soil conditions land cover and historic rainfall records. Epa s national stormwater calculator swc is a software application that estimates the annual amount of rainwater and frequency of runoff from a specific site. To help further promote green roof projects in the united states we decided to make our water runoff calculator tool available free of charge. Whether you re an urban planner developer landscape architect or homeowner this tool can help you balance land developments and landscaping with the right amount of green infrastructure.
Roof drains to raingardens at all downspouts. The green roof energy calculator is an online tool that allows users to compare the annual energy performance of a building with a vegetative green roof to the same building with either a dark roof or a white roof. National stormwater calculator help prevent pollution by controlling stormwater runoff. Half of lawn replaced by garden with native landscaping.