Glacier mapping of the Illecillewaet icefield, British Columbia, Canada, using Landsat TM and digital elevation data
Using a Monte Carlo technique for modelling the natural variability of streamflow in headwaters of the Sierra Nevada, USA
Differences in topographic characteristics computed from 100- and 1000-m resolution digital elevation model data
Using Landsat-5 thematic mapper and digital elevation data to determine the net radiation field of a mountain glacier.
Automatic extraction of watershed characteristics using spatial analysis techniques with application to groundwater mapping
Mapping salt-affected soils in remote rangelands is challenging. We used Landsat 7 ETM data to facilitate digital mapping of gypsic and natric soil areas in the upper Colorado River drainage. Optimum index factor band combinations were used to explore the scene. Normalized difference ratio models and threshold values were developed by comparing spectral signatures with gypsic and natric soil areas verifi ed in the fi eld. Gypsic soil areas were mapped using the normalized difference ratio of Bands 5 and 7 with a threshold >0.11, probably related to the spectral refl ectance of gypsum within a few centimeters of the surface. All sites predicted to be gypsic soil areas were determined to be gypsic by fi eld assessment,...
Longitudinal distributions of river flood power: the combined automated flood, elevation and stream power (CAFES) methodology
Stream power can be an extremely useful index of fluvial sediment transport, channel pattern, river channel erosion and riparian habitat development. However, most previous studies of downstream changes in stream power have relied on field measurements at selected cross-sections, which are time consuming, and typically based on limited data, which cannot fully represent important spatial variations in stream power. We present here, therefore, a novel methodology we call CAFES (combined automated flood, elevation and stream power), to quantify downstream change in river flood power, based on integrating in a GIS framework Flood Estimation Handbook systems with the 5 m grid NEXTMap Britain digital elevation model...