Sample list of data needed for GIS analysis

This is from a similar watershed analysis done here in LA...

From: Ballona Creek Watershed Bacteria Implementation Plan Draft
Appendix E
Structural BMP Selection Methodology

2.2.1 GIS Level Screening
2.2.1.1 Compilation of GIS Information
At this stage, the evaluation involves gathering the relevant watershed data using
local knowledge as well as relevant GIS themes to assist with site-specific evaluation. Collect and compile any of the following information, as available:

• Soils type data (or alternatively, zones of poor infiltration)
• Topographic contours and/or slope map data (used to identify areas of
  prohibitively steep slopes)
• Digital elevation models or other topographic data (used to verify/identify
  drainage areas)
• Groundwater elevations/depths (used to identify areas of high groundwater elevation)
• Floodplain (e.g., FEMA) map data (used to identify areas where flood control isrequired)
• Landslide and/or liquefaction zones (used to identify areas at risk for landslides or liquefaction)
• Biologically or Environmentally Sensitive Areas (BSA/ESA) and/or wetlands mapping data (used to identify significant habitat/wetland areas)
• Aerial photographs at the highest resolution available (used to visually assess parcel/catchment and adjacent land characteristics)
• Impervious surfaces (used to identify impervious and pervious areas for BMP implementation)
• Parcel ownership (used to identify whether parcels are publicly or privately owned)
• Storm drain as-built drawings (including flow direction, slopes, invert elevations, pipe sizes)