The City of Hilliard Sustainability Plan
The City of Hilliard Sustainability Plan
The City of Hilliard Sustainability Plan
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<strong>Hilliard</strong> <strong>Sustainability</strong> <strong>Plan</strong>ECON. EXECUTIVEENERGY DEV. &SOCIAL SUMMARY WASTE EQ.REDUCTIONOnce the impervious surfaces have been made into polygons thenext step would be to accurately measure the pervious surfaces.This can be done by simply subtracting the impervious area fromthe total area. With the current data there is a total <strong>of</strong> 5,878 acres<strong>of</strong> pervious groundcover. 48 To make this more accurate the sameprocess <strong>of</strong> using a GIS to determine the impervious cover wouldbe used to measure the pervious cover. It would be possible toalso add a multiplier as some previous ground covers all differ.This measure will greatly increase the accuracy <strong>of</strong> any calculationsbased on this data.Description<strong>The</strong> <strong>City</strong> <strong>of</strong> <strong>Hilliard</strong> has a large quantity <strong>of</strong> impervious surfaces. Thisdirectly affects the amount <strong>of</strong> surface run<strong>of</strong>f that is generated. Thissurface water run<strong>of</strong>f from impervious surfaces has been identifiedas increasing the non-point source pollutant loads <strong>of</strong> a watershed. 49Permeable surfaces also diminish the amount <strong>of</strong> groundwater inan area. 50 <strong>Hilliard</strong> has the opportunity to determine first how manyimpervious surfaces are present and how much water this puts intothe stormwater conveyance systems. This can then be used to determinewhat areas <strong>of</strong> the built environment have fewer permeablesurfaces. This information can be used to determine future actionto reduce impervious surface in the city, thus improving the quality<strong>of</strong> the receiving waters. If less water runs <strong>of</strong>f, then the <strong>City</strong> will needto spend less money to upgrade or create stormwater conveyanceinfrastructure. This in turn will lower the tax burden on the <strong>City</strong>’sresidents.<strong>The</strong> first step for <strong>Hilliard</strong> will be to make a more accurate GIS dataset.This will involve adding roadways, parking lots, sidewalks, andany other impervious surfaces. Once this has been finished the <strong>City</strong>will be able to determine the amount <strong>of</strong> impervious surfaces in differentsections <strong>of</strong> the <strong>City</strong> as well as overall. This knowledge can be used to developedgoals to reduce the impervious or preserve the pervious surfaces in specific areas.16
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