Exclosures and grazed areas responded similarly, and it was concluded that the topography and stream dynamics had a greater impact than the grazing regime in this study. Number of islands and island perimeter decreased, while the island area increased. The area of change (3.65 ha) was slightly larger than the area of no change (3.2 ha). Although stream length remained the same, stream width decreased in both grazed and exclosed areas. Stream length, stream width and areas of change were identified for both years. Aerial photos from 19 (scale of 1:4000) were geo- referenced with ground control points, and various stream features were digitized using a GIS. The 2.5 km long study area, consisting of the stream and riparian area was separated into exclosures and grazed areas in 1978. examine changes in stream morphology over 20 years, 2) to assess if changes were associated with management, topography or other factors, 3) to determine the feasibility of using large-scale aerial photography, GIS and Global Positioning Systems (GPS) techniques as a tool for assessing change over time. The increased resolution of large-scale aerial photos helps in identifying small features on the ground and is highly useful in the assessment of riparian areas. Remote sensing and Geographic Information System (GIS) techniques are common tools for time change analysis, however, in most cases satellite imagery or small- scale aerial photography is used.