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<br />001742 <br /> <br />19 <br /> <br />endangered species habitat such as KAS surveys. Additional sub-meter accuracy terrestrial <br />topographic coverage needs to be obtained for the remainder of the ecosystem. <br />Hydrographic base maps - The hydrographic mapping program was established for the <br />purpose of producing a sub-aqueous channel map of the Colorado River within the ecosystem. <br />Hydrographic mapping supports several GCMRC scientific initiatives including: streamflow and <br />fine-grained sediment transport, fine-grained sediment storage, streamflows and suspended <br />sediment modeling, advanced conceptual modeling of coarse grained sediment, fish habitat <br />mapping, and measuring changes in morphology and topography of the sub-aqueous canyon <br />ecosystem. The Center currently has low resolution (20 meter transects) single beam base data <br />from GDC to Badger Rapid, and GIS Site 7. Additionally, the Center has single beam data (10 <br />meter square) repeated since 1993 at 35 NAU sand bar sites (Hazel et aI., 1999; Kaplinski, <br />2000), repeated surveys from Paria (RM 1) to Cathedral Wash (RM 3), 4 large pool sites in Site <br />5 (Wiele, 1998),5 repeated surveys in RM 42-43 and RM 62-65 to monitor the 1996 flood, and a <br />pre- and post-flood survey on the Lake Mead Delta. High resolution (multi-beam) surveys also <br />exist in the pools from RM 1-3, RM 9-11, 29-42, and 45-68. Additional channel mapping of all <br />the 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 were processed in FY2002-03. Additionally, the GCMRC has explored the potential of <br />channel mapping using an airborne LiDAR system with water-penetrating capabilities as part of <br />a sediment augmentation feasibility study. <br />Mapping Riparian 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 (11 cm 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 />Mapping Warm-Water Fish Habitats and Cultural Features - The GCMRC's DASA staff <br />evaluated airborne thermal-infrared (TIR) data that were acquired at 100-cm resolution during <br />maximum solar heating (at 1 :30 p.m.) to determine the capability of such data for mapping warm <br /> <br />GCMRC FY2006 Annual Work Plan (Draft February 15,2005) <br />