Using repeat-pass satellite synthetic aperture radar interferometry, we develop a methodology to measure flood-induced erosion and deposition and apply it to a record 1996 glacier outburst flood (j¿kulhlaup) on Skeioˇar¿rsandur, Iceland. The procedures include (1) coregistration of backscatter intensity images to observe morphological differences; (2) mapping of interferometric phase correlation to identify preserved and modified surfaces; and (3) construction, correction, and differencing of pre-j¿kulhlaup and post-j¿kulhlaup topography. Procedures 1 and 2 are robust and should be widely applicable to other fluvial environments, while procedure 3 is complicated by uncertainties in phase measurement, baseline estimate and atmospheric effects. After a correction procedure involving interpolation of digital elevation model elevation differences across low-correlation areas, we find ~4 m of elevation change are required to calculate volumes of erosion or deposition. This condition was satisfied for the 40 km2 proglacial zone of Skeioˇar¿rsandur, where we estimate +38¿106 m3 of net sediment deposition along the ice margin, -25¿106 m3 of net erosion in channels downstream, and a total net balance of +13¿106. These estimates are supported by field observations and survey data collected in 1997. ¿ 2000 American Geophysical Union