The watershed transform is a powerful and popular tool for segmenting objects whose contours appear as crest lines on a gradient image : it associates to a topographic surface a partition into catchment basins, defined as attraction zones of a drop of water falling on the relief and following a line of steepest descent. To each regional minimum corresponds a catchment basin. Points from where s...

First posted September 20, 2022 For additional information, contact: Director, Columbia Environmental Research CenterU.S. Geological Survey4200 New Haven RoadColumbia, MO 65201Contact Pubs Warehouse The Missouri National Recreational River (MNRR) consists of two segments managed by the Park Service on border South Dakota and Nebraska. Both river are unchannelized maintain much their pre-dam cha...

 Relations between the third world countries in different parts of Asia and Africa during the 19th and 20th centuries, to a great extent, were influenced by the presence and policies of colonial powers. Thus, for a better understanding of roots of disputes and issues existing between these countries concerning frontiers, disputed Islands, political and prejudicial tensions, we need to study pas...

This study tests the assumption that the characteristics of channels within multiple channel rivers are different from those of single channel rivers. Some river restoration approaches propose radical transformation of river patterns, from multiple to single channels, based on the link between river patterns and their in-channel characteristics. Determining the links between river patterns and ...

This article presents a lowland mapping method for the Forested Guinea (Guinée Forestière) using a 30 m resolution Digital Elevation Model (DEM) that is currently the best option to analyze large forested areas. This low cost DEM method applies surface topography analysis processes to better discriminate areas with stagnant and/or accumulated water. The main index selected is the immediate prox...

Au Québec, la dynamique fluviale de rivière des Escoumins a été perturbée par l'industrie forestière pendant plus d'un siècle. Un barrage notamment construit près l'embouchure en 1846, puis démantelé 2013. Ces perturbations ont entraîné répercussions importantes sur l'équilibre du cours d'eau et l'habitat saumon atlantique. Cette étude propose donc caractériser d'analyser les impacts démantèlem...