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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (7) Types Journal Citation (3) Contacts Peter Caldwell, PhD U.S. Geological Survey - ScienceBase Peter Caldwell George H Leavesley Daniel R Cayan More... Categories Publication (7) Data (4) Tag Types Theme (5) Science Themes (7) Water, Coasts and Ice (6) Science Tools For Managers (5) Label (4) Landscapes (3) Organization (3) More... Tag Schemes None (4) https://www.sciencebase.gov/vocab/category/NCCWSC/ScienceThemes (7) https://www.sciencebase.gov/vocab/category/NCCWSC/Project/OrganizationName (7) https://www.sciencebase.gov/vocab/category/NCCWSC/ScienceToolsforManagers (6) https://www.sciencebase.gov/vocab/category/NCCWSC/WaterCoastsandIce (6) https://www.sciencebase.gov/vocab/category/NCCWSC/Landscapes (3) View Results as: JSON ATOM CSV

Linking River Management to Species Conservation Using Dynamic Landscape-scale Models Efforts to conserve stream and river biota could benefit from tools that allow managers to evaluate landscape-scale changes in species distributions in response to water management decisions. We present a framework and methods for integrating hydrology, geographic context and metapopulation processes to simulate effects of changes in streamflow on fish occupancy dynamics across a landscape of interconnected stream segments. We illustrate this approach using a 482 km2 catchment in the southeastern US supporting 50 or more stream fish species. A spatially distributed, deterministic and physically based hydrologic model is used to simulate daily streamflow for sub-basins composing the catchment. We use geographic data... Categories: Publication; Types: Citation; Tags: Rivers, Streams and Lakes, Southeast CASC, Water, Coasts and Ice, aquatic biodiversity, fluvial geomorphology, All tags... freshwater fishes, hydrologic models, metapopulation dynamics, Fewer tags Synthesizing models useful for ecohydrology and ecohydraulic approaches: An emphasis on integrating models to address complex research questions Categories: Publication; Types: Citation; Tags: Ecology, Ecology models, Hydraulics, Hydrologic models, Hydrology, All tags... Model Integration, Rivers, Streams and Lakes, Science Tools For Managers, South Central CASC, State of the Science, Water Quality, Water, Coasts and Ice, landscape, Fewer tags Regional to local coarse to fine scale global change impact study on flow Stream flows are essential for maintaining healthy aquatic ecosystems and for supporting human water supply needs. Integrated modeling approaches assessing the impact of changes in climate, land use, and water withdrawals on stream flows and the subsequent impact of changes in flow regime on aquatic biota at multiple spatial scales are necessary to insure an adequate supply of water for humans and healthy river ecosystems. We compared streamflow predictions from a regional-scale hydrological model to those of several fine-scale SW models under a range of hypothetical climate change scenarios to determine the range of predicted streamflow responses to fixed climate perturbations.This spreadsheet contains the results... Categories: Data; Types: Citation; Tags: ELOHA, Landscapes, Other Landscapes, Rivers, Streams and Lakes, Science Tools For Managers, All tags... Southeast CASC, State of the Science, Water, Coasts and Ice, calibration, ecosystem health, environmental flow, hydrologic models, uncertainty, water supply, Fewer tags Southeast modeling efforts for flow and ecology Stream flows are essential for maintaining healthy aquatic ecosystems and for supporting human water supply needs. Integrated modeling approaches assessing the impact of changes in climate, land use, and water withdrawals on stream flows and the subsequent impact of changes in flow regime on aquatic biota at multiple spatial scales are necessary to insure an adequate supply of water for humans and healthy river ecosystems. This spreadsheet contains an inventory of existing hydrologic models in the Southeast region and Puerto Rico. Data were compiled by contacting federal and state agencies, members of academia, and environmental consultants. Categories: Data; Types: Citation; Tags: ELOHA, Landscapes, Other Landscapes, Rivers, Streams and Lakes, Science Tools For Managers, All tags... Southeast CASC, State of the Science, Water, Coasts and Ice, calibration, ecosystem health, environmental flow, hydrologic models, uncertainty, water supply, Fewer tags Statistical Downscaling Using Localized Constructed Analogs (LOCA) Abstract (from http://journals.ametsoc.org/doi/abs/10.1175/JHM-D-14-0082.1): A new technique for statistically downscaling climate model simulations of daily temperature and precipitation is introduced and demonstrated over the western United States. The localized constructed analogs (LOCA) method produces downscaled estimates suitable for hydrological simulations using a multiscale spatial matching scheme to pick appropriate analog days from observations. First, a pool of candidate observed analog days is chosen by matching the model field to be downscaled to observed days over the region that is positively correlated with the point being downscaled, which leads to a natural independence of the downscaling results... Categories: Publication; Types: Citation; Tags: Atmosphere-land interaction, Climate models, Data Visualization & Tools, Hydrologic models, Hydrometeorology, All tags... Land surface model, Regional effects, Science Tools for Managers, Southwest CASC, Fewer tags The modular modeling system (MMS) - The physical process modeling component of a database-centered decision support system for water and power management The Modular Modeling System (MMS) is an integrated system of computer software that is being developed to provide the research and operational framework needed to support development, testing, and evaluation of physical-process algorithms, and to facilitate integration of user-selected sets of algorithms into operational physical-process models. MMS uses a module library that contains compatible modules for simulating a variety of water, energy, and biogeochemical processes. A model is created by selectively linking modules from the library using MMS model-building tools. A geographic information system (GIS) interface also is being developed for MMS to support a variety of GIS tools for use in characterizing and... Categories: Publication; Types: Citation, Journal Citation; Tags: Geographic Information System (GIS), Springer Netherlands, Water, Air, & Soil Pollution, decision support system, electric power production, All tags... hydrologic models, reservoir management, water management, water resources planning, watershed models, Fewer tags Preliminary identification of Price River basin salt pickup and transport processes The Price River is a significant contributor of salt to the Colorado River. Relatively pristine waters leaving the upper elevations of the basin degenerate into highly saline waters entering the Green River. The primary reason for this deterioration is the contact of the water with the Mancos shale, a marine deposit underlying most of the central basin. This paper presents the structure of an evolving model of the salt pick-up and transport processes in the Price River basin. The initial purpose of the model is to aid in the identification of the natural and man-modified hydro-salinity-sediment system of the basin, based on data collection and analysis in the field and the laboratory. This identification procedure... Categories: Publication; Types: Citation, Journal Citation; Tags: Journal of the American Water Resources Association, channel erosion, efflorescence, erosion, hydrologic models, All tags... salinity, sediment transport, simulation, Fewer tags Applications of a GIS for modeling the sensitivity of water resources to alterations in climate in the Gunnison River Basin, Colorado The Gunnison River drains a mountainous basin in western Colorado, and is a large contributor of water to the Colorado River. As part of a study to assess water resource sensitivity to alterations in climate in the Gunnison River basin, climatic and hydrologic processes are being modeled. A geographic information system (GIS) is being used in this study as a link between data and modelers - serving as a common data base for project personnel with differing specialties, providing a means to investigate the effects of scale on model results, and providing a framework for the transfer of parameter values among models. Specific applications presented include: (1) developing elevation grids for a precipitation model... Categories: Publication; Types: Citation, Journal Citation; Tags: Geographic Information System (GIS), Journal of the American Water Resources Association, climate change, hydrologic models, visualization Large-scale and fine-scale model outputs for model comparison workshop Stream flows are essential for maintaining healthy aquatic ecosystems and for supporting human water supply needs. Integrated modeling approaches assessing the impact of changes in climate, land use, and water withdrawals on stream flows and the subsequent impact of changes in flow regime on aquatic biota at multiple spatial scales are necessary to insure an adequate supply of water for humans and healthy river ecosystems. This report inventories and then directly examines and compares a subset of hydrological models implemented in the Southeastern US that were used to estimate streamflow at a number of gaged basins across the region. This effort was designed to evaluate, quantify and compare the magnitude, and... Categories: Data; Types: Citation; Tags: ELOHA, Landscapes, Other Landscapes, Rivers, Streams and Lakes, Science Tools For Managers, All tags... Southeast CASC, State of the Science, Water, Coasts and Ice, calibration, ecosystem health, environmental flow, hydrologic models, uncertainty, water supply, Fewer tags Water management elements on the Rio Grande/Bravo basin This is one of five general categories that contains the water management elements on the Rio Grande/Bravo basin. This category includes the dams, water districts, and water related models on the United States and Mexico that overlap the basin boundary. Categories: Data; Types: Citation; Tags: Dams, Groundwater models, Hydraulic models, Hydrologic models, Irrigation districts, All tags... Optimization models, Reservoirs, Rivers, Streams and Lakes, Science Tools For Managers, South Central CASC, State of the Science, Water allocation models, Water districts, Water management, Water related models, Water, Coasts and Ice, Fewer tags Structure and Detectability of Trends in Hydrological Measures over the Western United States This study examines the geographic structure of observed trends in key hydrologically relevant variables across the western United States at ⅛° spatial resolution during the period 1950–99. Geographical regions, latitude bands, and elevation classes where these trends are statistically significantly different from trends associated with natural climate variations are identified. Variables analyzed include late-winter and spring temperature, winter-total snowy days as a fraction of winter-total wet days, 1 April snow water equivalent (SWE) as a fraction of October–March (ONDJFM) precipitation total [precip(ONDJFM)], and seasonal [JFM] accumulated runoff as a fraction of water-year accumulated runoff. Observed changes... Categories: Publication; Types: Citation; Tags: North America, Trends, hydrologic models