{
  "accessLevel": "public",
  "bureauCode": [
    "010:12"
  ],
  "contactPoint": {
    "@type": "vcard:Contact",
    "fn": "Silvia Terziotti",
    "hasEmail": "mailto:seterzio@usgs.gov"
  },
  "description": "Slope-Area Index (SAI) is used to predict erosion along a stream channel. It is a function of channel slope, and drainage area upstream raised to the exponent used in equations for flood frequency of 2-percent exceedance floods. The guidelines for use of the coefficient from 2-percent exceedance came from meetings with cooperators describing bankfull discharge as a 2-percent exceedance.\nThe Slope-Area Index, as defined by Cartwright and Diehl, 2017, is calculated as:\nSAI = S *  A^b (1)\nwhere\nSAI is the slope-area index,\nS is the channel slope,\nA is the drainage area (the number of cells draining into the target cell), and b is a user-specified exponent. \nThe flood frequency report for NC (Weaver and others, 2009) defines the regional regression equations for exceedance flows for rural basins in the Southeast. The 2-percent chance exceedance flow raises the Drainage Area uses a 0.60 coefficient for all the physiographic provinces other than Small Urban basins in the Piedmont.\nThe Urban equations drainage area coefficients for 2-percent exceedance flow (Feaster and others, 2014) were used for Piedmont (HLR2) urban basins. Urban basins were defined as catchments which were greater than 10% developed (urban). \nFor piedmont (HLR2, small urban le 3 dasqmi and pcturb gt 10%) SAI = slope*da^0.8\nFor piedmont (HLR2, small urban dasqmi gt 3 and le 436 and pcturb ge 10%) SAI = slope * da^.5",
  "distribution": [
    {
      "@type": "dcat:Distribution",
      "accessURL": "https://doi.org/10.5066/P9PRAVAQ",
      "description": "Landing page for access to the data",
      "format": "XML",
      "mediaType": "application/http",
      "title": "Digital Data"
    },
    {
      "@type": "dcat:Distribution",
      "description": "The metadata original format",
      "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5b72ee9fe4b0f5d5787c5723.xml",
      "format": "XML",
      "mediaType": "text/xml",
      "title": "Original Metadata"
    }
  ],
  "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5b72ee9fe4b0f5d5787c5723",
  "keyword": [
    "USGS:5b72ee9fe4b0f5d5787c5723",
    "drainage area",
    "elevation",
    "geomorphology",
    "sediment",
    "slope"
  ],
  "modified": "2024-02-08T00:00:00Z",
  "publisher": {
    "@type": "org:Organization",
    "name": "U.S. Geological Survey"
  },
  "spatial": "-84.6982, 33.4746, -75.3018, 37.5216",
  "theme": [
    "geospatial"
  ],
  "title": "Slope Area Index (SAI) of North Carolina"
}