Growing concerns over global environmental change, water resources, river restoration, and sustainable river management are focusing attention on the human dimension of fl uvial systems. This GSA Special Paper presents a set of studies and interpretations of river-channel change that refl ect modern viewpoints of river management in the twenty-fi rst century. It seeks to bridge a rich body of l...

In the evolution processes of wind blown sand movement and aeolian geomorphology, it always contains some complex behaviors, for example, the nonlinear character of turbulence and attractors, the stochastic character of wind gust, liftoff and movement of sand, the interaction among wind field, sand movement, electric field in wind blown sand flux and thermal diffusion, multi-scale character fro...

The present study deals with the inter-relations in the relief which forms the Bacia do Alto Rio Paraguay (BAP) in mid-west Brazil. The overall aim is to discuss the relationship between relief forms and the biodiversity of the Pantanal. The BAP is a natural environmental system with contrasts in two of the compartments on which it is formed: the plateau, the most elevated compartment, highly t...

This sixth special issue on Marine and Coastal Geographic Information Systems (M&CGIS) 11 is the first to be based on an organized series of presentations at a conference, the 2008 12 Association of American Geographers (AAG) Annual Meeting in Boston, Massachusetts, 13 USA. The papers were selected and peer reviewed for publication in this special issue 14 under the theme “Marine Geomorphology ...

The world’s arid lands are some of the most beautiful landscapes on Earth, and their paucity of vegetation often makes it possible to see landforms and structures with great clarity (Figure 1.1). In addition, they have many characteristics both in terms of landforms and geomorphological processes that render them different from other major environments (see, for example, Laity, 2008; Parsons an...

In recent years, applications and analyses based on slope units have become increasingly widespread. Compared with grid units, can better represent terrain features boundaries allow a more complete view of the morphology Earth’s surface. Maps also offer significant improvements for disaster prediction analysis land resources. Therefore, we need reasonable method unit classification. Although so...

Geodiversity is considered as the natural range of geological, geomorphological, and soil features, including their assemblages, relationships, properties, interpretations, and systems. A method developed for the quantitative assessment of geodiversity was applied to Paraná, a Brazilian state with an area of about 200,000 km(2). The method is based on the overlay of a grid over different maps a...

The study illustrates the use of Geographic Information System (GIS) tools and numerical Multi-Criteria Evaluation (MCE) techniques for selection of suitable sites for urban development of a hill town. This study was conducted to identify suitable sites for urban development of a hill town, Nahan using GIS-based multi-criteria evaluation of slope, road proximity, land use, land values, soil and...