W

WAAS. See Wide Area Augmentation System (WAAS) WADGPS. See Wide Area DGPS (WADGPS) Water application, 253 Water content, 32

Water-filled pore space (WFPS), 275, 278 Water front propagation, 327-328 Water molecules, 90

Watershed characteristics, 234 Water tables, 46 Wave equation, 112, 120, 130 Wavelet analysis, 72 Wave propagation, 157-160 Wave's amplitude, 310 Wave types, 156-157 Wenner, Frank, 21, 60 Wenner array apparent electrical conductivity, 22 apparent soil electrical conductivity, 100 areal resistivity mapping, 94 Earth Resistivity Meter, 299 electrode configuration switched, 296 electrodes at soil surface, 22 galvanic contact resistivity, 97-98 measure of ECa, 62 volume of measurement, 22-23 WFPS. See Water-filled pore space (WFPS) WGS84. See World Geodetic System 1984 (WGS84) Wide Area Augmentation System (WAAS), 183, 184 Wide Area DGPS (WADGPS), 182-183 Wide-offset reflection (WOR) data, 307-309, 310 Wide-offset surveys, 310-314 Wiggle trace (scan), 142 Within-field spatial variability, 30 Within-field variation, 33, 77 WOR. See Wide-offset reflection (WOR) data WOR GPR, 311-313

World Geodetic System 1984 (WGS84), 168, 179, 180

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