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<br />\)I.~ <br />\.\) <br /> <br />21 <br /> <br />ecosystem, We currently have low resolution (20 meter transects) single beam base data from <br />GDC to Badger Rapid, and GIS Site 7. We currently have single beam data (10 meter square) <br />repeated since 1993 at 35 NAU sand bar sites (Hazel et al., 1999; Kaplinski, 2000), repeated <br />surveys from Paria (RM I) to Cathedral Wash (RM 3), 4 large pool sites in Site 5 (Wiele, 1998), <br />5 repeated surveys in RM 42-43 and RM 62-65 to monitor the 1996 flood, and a pre- and post- <br />flood survey on the Lake Mead Delta, We also l:1ave high resolution (multi-beam) surveys in the <br />pools from RM 1-3, RM 9-11, 29-42, and 45-68, Additional channel mapping of all the <br />remaining river channel needs to be obtained as control is established, In FY2001-03, <br />hydrographic channel data was collected for approximately 60 additional miles of the CRE, This <br />data was processed in FY2002-03, New technology for channel mapping (Navy's CHARTS <br />sensor) will be tested and evaluated in FY04-06, <br /> <br />MaDDing RiDarian Vegetation - We examined various airborne remote-sensing data that <br />were collected during different seasons within a one-year time frame, with different spatial <br />resolutions (II em to 100 cm), and with various technologies (CIR film, CIR CCDs, and multi- <br />spectral data) to determine the relative merits of each data set for mapping riparian vegetation <br />within the Grand Canyon, This study determined that digital, 3-4 band image data using <br />appropriate wavelength bands can provide maps of riparian vegetation communities at a 60-70% <br />accuracy level without field surveys, Field verification and limited surveys can increase this <br />accuracy to about 80% or greater. <br /> <br />MaDping Warm-Water Fish Habitats and Cultural Features - We evaluated airborne <br />thermal-infrared (TIR) data that were acquired at I OO-cm resolution during maximum solar <br />heating (at 1:30 p,m,) to determine the capability of such data for mapping warm backwaters and <br />near-shore habitats for fish, in addition to mapping archaeological structural sites and natural <br />springs within the Grand Canyon, Airborne TIR data can provide an instantaneous map of <br />surface water temperature for very large regions, which cannot be obtained by in-situ <br />measurement methods, Detection of archaeological structures requires the use of an airborne TIR <br />sensor that can detect temperature differences as small as 0,1 degrees C, and provide at a spatial <br />resolution of no more than 25 cm, Detection would be optimized by data collection after sunset <br />or just after sunrise. Safety issues after dark and shadows during early morning make such data <br />collections very difficult. Detection of natural springs is better approached using T1R data <br /> <br />GCMRC FY2005.2006 Draft Annual Work Plan (November 10,2003) <br />