‰&(ᩪÔòÑÒµ¥…ĞiZw˜6í°Ã´ÿZbƪæØ¿NŞÇ�ØZ�çz�€x�¹^œ‚âòK`âË*÷9X³îçíæóÙ>¯H`±X2ŒÊP ßw?•o7S”ç®IŸzOI×�9mùbw'ƒİ³ì¥ZZ‚. ×çƵy}Ü[\“W?Â0ÍéUFˆ½�h^>ÊHG¯}Äy„/½y"-&D[‹Ÿ0êŒçÈlaU¢K\y ¼à­C^‡õ_²º°µ„YM2�1æŞSˆè)xß‘± ïpx£z^1‰ÏÊÇ&û7şƒÃş~«ƒïÕQ˜²1L´¹/«÷>M¼åQÌòÿ†ÙŠ²‡ÄzøÚHÊ”÷ÛŒËwuà� ¦** This story map shows the steps involved to use high resolution multispectral imagery to derive a pervious/impervious surface map for a residential area near Louisville, Kentucky. H‰´“Moƒ0†ïü endstream endobj 88 0 obj <>stream For more information or to order Impervious Surface Calculation Products, call Sanborn customer service at 1.866.SANBORN (1.866.726.2676), or contact us by e-mail at information@sanborn.com. Website Owner: NOAA Office for Coastal Management | Last Modified: 05/07/2020, https://coast.noaa.gov/data/digitalcoast/zip/ISAT.ZIP, National Estuarine Research Reserve Association, National States Geographic Information Council, National Oceanic and Atmospheric Administration, Categorize results to represent good, fair, and poor water quality, Predict how management scenarios might impact local water quality, Polygon data set for which percentage of impervious surface is to be calculated, Land cover impervious surface coefficients. Requires ArcGIS 10.x and Spatial Analyst Extension. Impervious Surface Calculation Sheet Keywords: maximum building coverage, maximum impervious surface coverage, calculation sheet, additions, sheds, accessory structures, plot plan, permit applications Created Date: 20080128223145Z Pervious/Impervious Runoff Calculations Overview. "üB�®0«JD5ÆN_"§)l¯|"Û_hYà vo³r„ÔöÑY9…¼³rŠg¹G€‹òûË…j×Ñ`ğ“'å"8¹8_.Dç˜kÌEKÍ'ƶ[ª`ğÛÅlğÂ>˜�¶j´–�ESkw/U ´ŠxÄ°4EÑT³&)ÇûÑ. This downloadable suite of easy-to-use scripts for ArcGIS calculates the percentage of impervious surface area within user-selected geographic areas such as watersheds, municipalities, and subdivisions. ŒâOÉó Note: Tutorial and sample data are included in the download package. IMPERVIOUS SURFACE CALCULATION PRODUCTS. 03ãf:^×u$‹'¡Ò¥W³ô nJáÅ�@°�ÏOUɺ^;õ´;I™ó£„;Q‘í�hCU™Üãï+! îbAß�ø«'˜. Impervious Surface Calculations (To be Submitted with Building Permit Application) For All Properties Located in the Shoreland District (SD). Features. IMPERVIOUS SURFACE CALCULATIONS AREA OF PARCEL Impervious surface includes, but is not limited to decks, driveways (concrete, asphalt, or gravel), sidewalks (boardwalks, concrete, rock, landscape block, etc. Requires ArcGIS 10.x and Spatial Analyst Extension. ), plastic-lined landscaping and structures. This downloadable suite of easy-to-use scripts for ArcGIS calculates the percentage of impervious surface area within user-selected geographic areas such as watersheds, municipalities, and subdivisions. Impervious surfaces are an environmental concern because, with their construction, a chain of events is initiated that modifies urban air and water resources: . Environmental effects. With HydroCAD 7.1 and earlier, a single composite Curve Number is calculated for each subcatchment. Help us build better tools and services by sharing your story with us. Calculate impervious surface … CONTACT US GET PDF This value is a weighted average of all the CN values in the subcatchment, including all pervious and impervious surfaces. To download, please visit https://coast.noaa.gov/data/digitalcoast/zip/ISAT.ZIP. The Maximum Impervious Surface Coverage Permitted is 30 Percent. Many local governments use impervious surface calculations to determine the storm water bills for properties. Mapping impervious surface from satellites has been shown to be accurate across a range of conditions and satellite platforms (Yuan and Bauer, 2007), with high accuracies reported at the watershed scale, and further work has shown high correlation between levels of satellite-estimated impervious surface and declines in stream quality (Slonecker et al., 2001; Snyder et al., 2005). Property Address_____ Lot Area _____ sq.