Skip to main content
Advanced Search

Filters: Tags: Water (X)

1,071 results (188ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
With the continuing increase in world population, and rising standard of living, more and more water will be necessary to satisfy basic human needs. The global picture with regard to water use and availability is very uneven, and the policy options for major sectoral uses -- rural and urban water supply, agricultural requirements and hydro-electric power generation are explored. The social and environmental implications of water development are briefly discussed. Finally, the question of the availability of adequate water to sustain future world population and development to the year 2000 is analysed. It is concluded that the major problem in the area of water-resources development is not one of the Malthusian spectre...
thumbnail
This dataset contains small cutthroat trout lakes within Southeast Alaska. These are smaller lakes that do not produce cutthroat trout large enough to reach the 11-inch regional minimum size limit. Each of these lakes has a 9-inch minimum size limit, and bait is prohibited. Regionwide limits of 2 per day and 2 in possession apply. Currently there are seven lakes in Southeast Alaska with the small cutthroat lake designation. Please verify fishing regulations with current Alaska Department of Fish and Game Sport Fishing Regulations at the following link: http://www.adfg.alaska.gov/index.cfm?adfg=fishregulations.se_sportfish
An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site was instrumented to collect data on soil-water content, soil-water potential, ground water levels, major ions, pesticides, and nutrients from the unsaturated zone during 2002-2004. The data set was enhanced with site-specific information describing weather, soils, and agricultural practices. The Root Zone Water Quality Model was used to simulate physical, chemical, and biological processes occurring in the unsaturated zone. Model calibration to bromide tracer concentrations indicated flow occurred through the soil matrix. Simulated recharge rates were within...
thumbnail
This dataset represents the soil water storage capacity (AWS in mm at 0.25 m depth) from SSURGO and STATSGO soil descriptions for soil map units in the state of southern Alaska that lie within the North Pacific Landscape Conservation Cooperative. Available Water Storage 0-25 cm - Weighted Average (centimeters). Available water storage (AWS). The volume of water that the soil, to a depth of 25 centimeters, can store that is available to plants. It is reported as the weighted average of all components in the map unit, and is expressed as centimeters of water. AWS is calculated from AWC (available water capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity)...
thumbnail
This dataset represents the soil water storage capacity (AWS in mm at 0.5 m depth) from SSURGO and STATSGO soil descriptions for soil map units in the state of southern Alaska that lie within the North Pacific Landscape Conservation Cooperative. Available Water Storage 0-50 cm - Weighted Average (centimeters). Available water storage (AWS). The volume of water that the soil, to a depth of 50 centimeters, can store that is available to plants. It is reported as the weighted average of all components in the map unit, and is expressed as centimeters of water. AWS is calculated from AWC (available water capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity)...
thumbnail
Climate and land-use change are major components of global environmental change with feedbacks between these components. The consequences of these interactions show that land use may exacerbate or alleviate climate change effects. Based on these findings it is important to use land-use scenarios that are consistent with the specific assumptions underlying climate-change scenarios. The Integrated Climate and Land-Use Scenarios (ICLUS) project developed land-use outputs that are based on a downscaled version of the Intergovernmental Panel on Climate Change (IPCC) Special Report on Emissions Scenarios (SRES) social, economic, and demographic storylines. ICLUS outputs are derived from a pair of models. A demographic...
thumbnail
Aucune base de données ne disposait du positionnement numérique des ports. Les ports fluviaux correspondent à des noeuds des [axe_hydro]. Ils ont été positionnés par comparaison entre le fichier des localités transmis par la MONUC et, soit la carte des ports transmis par la RVF, soit le listing des ports transmis par la SNCC. En l’absence de ville ou de village portant le nom du port, le noeud a été créé en référence au PK transmis par la SNCC ou la RVF. Le positionnement des ports fluviaux a été fait au sein de l’agence UNJLC de Kinshasa en 2006. No database gives a numerical position of ports. The fluvial ports correspond to nodes on the hydrologic axes. They are positioned by comparisons between the local data...
thumbnail
This metadata describes water point data for the Oregon Framework Hydrography data and the standard system used to identify the state's surface water. The Water Points (WP) layer is the repository for springs, seeps and other hydrographic features with limited spatial extent (i.e. most easily represented by a point).
thumbnail
Limites des secteurs de la RDC. Le fichier est issu de la digitalisation par UNOCHA et UNDP de l’atlas de l’organisation administrative de la RDC réalisé par le père Léon de Saint Moulin. Lorsque les limites de secteurs sont définies par un cours d’eau, la géométrie a été partagée. La toponymie et la codification ont été validées par l’INS. Boundaries of sectors of the Democratic Republic of Congo (RDC). This dataset is a digitization of UNOCHA and UNDP of the administraive organization atlas for the RDC produced by leon de Saint Moulin. The boundaries of these sectors are defined by waterways, geometry and and subdivisions. The toponomy and codification were validated by the INS.
thumbnail
Intermittent and ephemeral streams represent more than half of the length of the global river network. Dryland freshwater ecosystems are especially vulnerable to changes in human-related water uses as well as shifts in terrestrial climates. Yet, the description and quantification of patterns of flow permanence in these systems is challenging mostly due to difficulties in instrumentation. Here, we took advantage of existing stream temperature datasets in dryland streams in the northwest Great Basin desert, USA, to extract critical information on climate-sensitive patterns of flow permanence. We used a signal detection technique, Hidden Markov Models (HMMs), to extract information from daily time series of stream...
Categories: Publication; Types: Citation; Tags: Water
thumbnail
These data represent stream temperature observation locations for a portion of a larger study area known as the Great Northern Landscape Conservation Cooperative (GNLCC) http://greatnorthernlcc.org/. These data were collected and processed as part of the NorWeST stream temperature project http://www.fs.fed.us/rm/boise/AWAE/projects/NorWeST.htmlThese thermograph locations and the attendant temperature observations were used as the baseline data for the NorWeST stream temperature modeling project. As a result, modeled temperatures will be most reliable in areas with the greatest density of thermographs. These data reside in ESRI shapefile format, ArcGIS version 9.3. The point shapefile extents correspond to NorWeST...
thumbnail
These data represent modeled stream temperatures for a portion of a larger dataset known as the Great Northern Landscape Conservation Cooperative (GNLCC) (http://greatnorthernlcc.org/). This metadata record is a combined description for two spatial data feature types, vector lines and points, which cover the same geographic area. The line features are derived from NHDPlus (http://www.horizon-systems.com/NHDPlus/index.php) (USEPA and USGS, 2010) stream lines and the point data represent 1 km intervals along the NHDPlus stream network. Both datasets contain identical modeled stream temperature attributes. These modeled stream temperatures were generated as part of the U.S. Forest Service NorWeST stream temperature...
Abstract (from http://onlinelibrary.wiley.com/doi/10.1002/hyp.10964/abstract): While the effects of land use change in urban areas have been widely examined, the combined effects of climate and land use change on the quality of urban and urbanizing streams have received much less attention. We describe a modelling framework that is applicable to the evaluation of potential changes in urban water quality and associated hydrologic changes in response to ongoing climate and landscape alteration. The grid-based spatially distributed model, Distributed Hydrology Soil Vegetation Model-Water Quality (DHSVM-WQ), is an outgrowth of DHSVM that incorporates modules for assessing hydrology and water quality in urbanized watersheds...
map background search result map search result map Small Cutthroat Trout Lakes NorWeST Predicted Stream Temp Lines Upper Snake Bear NorWeST Observed Temp Points Upper Snake Bear Soil water storage capacity (AWS in mm at 0.25 m depth) for the North Pacific Landscape Conservation Cooperative- southern Alaska (a), USA Soil water storage capacity (AWS in mm at 0.5 m depth) for the North Pacific Landscape Conservation Cooperative- southern Alaska (a), USA Les collectivites de Congo (small local governments of Congo) Les port de Congo (ports of Congo) Oregon Water Points (hydrographic features) Impervious Surface: Projected 2050 USGS Land Cover - Woodland for Mississippi 20160519 State or Territory Shapefile USGS Land Cover - Woodland for Missouri 20180127 State or Territory Shapefile USGS Land Cover - Woodland for District of Columbia 20180810 State or Territory Shapefile USGS Land Cover - Woodland for California 20181111 State or Territory FileGDB 10.1 USGS Land Cover - Woodland for District of Columbia 20180810 State or Territory Shapefile Small Cutthroat Trout Lakes USGS Land Cover - Woodland for Mississippi 20160519 State or Territory Shapefile USGS Land Cover - Woodland for Missouri 20180127 State or Territory Shapefile Oregon Water Points (hydrographic features) NorWeST Observed Temp Points Upper Snake Bear Impervious Surface: Projected 2050 NorWeST Predicted Stream Temp Lines Upper Snake Bear USGS Land Cover - Woodland for California 20181111 State or Territory FileGDB 10.1 Soil water storage capacity (AWS in mm at 0.25 m depth) for the North Pacific Landscape Conservation Cooperative- southern Alaska (a), USA Soil water storage capacity (AWS in mm at 0.5 m depth) for the North Pacific Landscape Conservation Cooperative- southern Alaska (a), USA Les port de Congo (ports of Congo) Les collectivites de Congo (small local governments of Congo)