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Wenzhao Li, Dongfeng Li and Zheng N. Fang
Numerous algorithms have been developed to automate the process of delineating water surface maps for flood monitoring and mitigation purposes by using multiple sources such as satellite sensors and digital elevation model (DEM) data. To better understan...
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Felipe Lucena, Fabio Marcelo Breunig and Hermann Kux
In this study, we used images obtained by Unmanned Aerial Vehicles (UAV) and an instance segmentation model based on deep learning (Mask R-CNN) to evaluate the ability to detect and delineate canopies in high density orange plantations. The main objectiv...
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Laura Keys and Jussi Baade
Nine digital elevation model (DEM) datasets were used for separate delineations of the Nam Co, Tibet catchment and its subcatchments, and these delineated areas were compared using the highest resolution dataset, TanDEM-X 12 m, as a baseline. The mean de...
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Aslam Hanief and Andrew E. Laursen
The Grand River watershed is an important agricultural area in southern Ontario, with several large and growing municipalities. Based on digital elevation models (DEMs), the natural drainage network was modelled to predict flow paths. Channel lengths and...
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Leilei Li, Jintao Yang and Jin Wu
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C. Scott Watson, Jeffrey S. Kargel and Babulal Tiruwa
Topography derived using human-portable unmanned aerial vehicles (UAVs) and structure from motion photogrammetry offers an order of magnitude improvement in spatial resolution and uncertainty over small survey extents, compared to global digital elevatio...
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Tianlu Qian, Dingtao Shen, Changbai Xi, Jie Chen and Jiechen Wang
Flood plains, which are commonly distributed in flat river or lake basins, often contain large tracts of farmland. Therefore, flood plains require precise and detailed information on the role played by farmland in flood routing simulations, flood risk ev...
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Elisabete S.V. Monteiro, Cidália C. Fonte and João L.M.P. de Lima
Terrain slope and drainage networks are useful components to the basins morphometric characterization as well as to hydrologic modelling. One way to obtain the slope, drainage networks, and basins delineation is by their extraction from Digital Elevation...
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Gerald Krebs, Teemu Kokkonen, Heikki Setälä, Harri Koivusalo
Pág. 1 - 23
Urbanization leads to the replacement of natural areas by impervious surfaces and affects the catchment hydrological cycle with adverse environmental impacts. Low impact development tools (LID) that mimic hydrological processes of natural areas have been...
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Jianli Zhang and Xuefeng Chu
DEM-based topographic characterization and quantification of surface depression storage are critical to hydrologic and environmental modeling. Mixed conclusions have been obtained from previous studies on the relationship between maximum depression stora...
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