![]() Although valuable as an integrated set of analyses covering erosion, hydrology, and habitat morphology, among other modules (i.e., USDA 1995, WDNR 1997, OWEB 1999), existing watershed analysis approaches suffer from several limitations. For instance, during the last decade basin-scale studies of watershed processes (e.g., watershed analysis) have oc-Ĭurred widely across the western United States by state and federal agencies, and by private industry in support of resource management and regulation, motivated in part by habitat conservation plans, water quality laws, and stream restoration programs. As a consequence, watershed assessments and natural resource management planning are not utilizing many advances in computer modeling of watershed environments. Nevertheless, despite a diversity of landscape tools and digital data sets, none of them is widely available or user-friendly, with consistent coverage extending to landscapes and regions in support of natural resource management. There are good examples of computer-based analyses related to topographic attributes involving erosion and aquatic habitats (Pess et al. In the coupled human-watershed environment, digital data and Geographical Information System (GIS) software are proving increasingly important in support of resource management planning at scales pertinent to ecological processes (Lunetta et al. They (1) stratify watersheds for varying types and intensities of resource management, including forestry, fire planning, grazing, and hydropower (2) identify variability in watershed processes for appropriate application of environmental regulations (3) prioritize watershed and in-stream monitoring and research and 4) delineate areas for increased protection, restoration, or conservation. Keywords: watershed analysis, terrain analysis, resource management, GIS, watershedsĮDERAL AND STATE AGENCIES, private industries, and conservation organizations responsible for large tracks of land face a growing set of tasks. NetMap provides decision support for forestry, restoration, monitoring, conservation, and regulation. To facilitate its use, NetMap contains hyperlinked users’ manuals and reference materials, including a library of 50 watershed parameters. Search functions target overlaps between specific hillslope and channel conditions and between roads and landslide or debris flow potential. Approximately 25 automated tools address erosion risk, habitat indices, channel classification, habitat core areas, habitat diversity, and sediment and wood supply, among others. Watershed attributes are aggregated up to subbasin scales (⬃10,000 ha), allowing comparative analyses across large watersheds and landscapes. Hillslope attributes, such as erosion potential, sediment supply, road density, forest age, and fire risk are aggregated down to the channel habitat scale (20 –200 m) allowing unique overlap analyses, and they are accumulated downstream in networks revealing patterns across multiple scales. Refer to NetMap Portal’s technical help and tutorial.NetMap: A New Tool in Support of Watershed Science and Resource Management Lee Benda, Daniel Miller, Kevin Andras, Paul Bigelow, Gordon Reeves, and David Michael Abstract: An integrated suite of numerical models and analysis tools (NetMap) is created for three purposes: (1) Develop regional scale terrain databases in support of watershed science and resource management, (2) Automate numerous kinds of watershed analyses keying on environmental variability for diversifying resource management options, and (3) Improve tools and skills for interpreting watershed-level controls on aquatic systems, including natural disturbance. NetMap Portal watersheds only cover a select subgroup of all NetMap datasets, primarily using LiDAR developed after 2017. Searches can be made to identify locations where two attributes overlap, like the highest 1% of coho habitat quality and the highest 10% of erosion potential. Here users can pan, zoom in and out, and search for specific watershed attributes, like the best fish habitats, highest erosion potential, best riparian areas and widest floodplains, among other attributes. The NetMap Portal, a free online mapping application, was developed to ease access and use of virtual watershed information in the form of maps. Thus, many people may have difficult accessing and using the wealth of watershed information contained in NetMap datasets. Using ArcGIS requires adequate computer hardware, proprietary software and some experience. NetMap’s virtual watersheds work within an ArcGIS environment as a set of digital shapefiles, and contain information pertaining to river networks, channel environments, floodplains, riparian zones, erosion potential and roads. What is NetMap Portal? Online Watershed Maps
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