Skip to main content
Advanced Search

Filters: Types: OGC WMS Service (X)

27,521 results (215ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
Since 1988, the Long Term Resource Monitoring Program (LTRMP) has performed basic limnological field measurements in the Upper Mississippi River System. The period of this report (1993 96) includes a major revision of the LTRMP sampling design in 1993 that added randomization, broader spatial coverage, and increased monitoring of tributaries and locations that allow monitoring of material transport. Monitoring by the Lake City Field Station reported here shows water quality differences among the tributaries to Pools 4 and 5, spatial and temporal patterns within these pools, and the sediment and nutrient trapping effects of Lake Pepin, a natural impoundment of the Mississippi River.
thumbnail
Synopsis: This article outlines how wetlands can significantly reduce flooding in the Upper Mississippi watershed. The authors first provide a historical context by estimating the original and lost wetland storage capacities of the Upper Mississippi and Missouri River Basins. Historically, about 10% of the basin would have been classified as wetland in 1780. By 1980, wetland acreage had been reduced to only 4% of the basin, representing about 26 million acres of wetlands eliminated since 1780. The area of wetland restoration required to reduce the risk of future flooding adequately was estimated based on the total amount of excess floodwater beyond bank-full discharge that passed through the City of St. Louis during...
thumbnail
Hydraulic functions of retention devices in natural large rivers have been studied. An evaluation of detention devices formed due to side channels, islands, backwaters, and stump fields within the Upper Mississippi Pools has shown that these are quite significant and in some cases these detention areas within the channel borders can occupy as much as 75 to 93% of the total surface area. A large eddy on the order of the width of the Mississippi River in Pool 19 is used to illustrate the travel time in the hydraulic retention areas.
thumbnail
Most severe disturbances in the Northeastern States associated with stream reaches being scored as having high or very high risk of habitat degradation. Disturbances are grouped into super categories (fragmentation by dams; nutrient and sediment pollution; human population; road length and crossings; water withdrawals; urban land use; agricultural land use; mines and impervious surface cover) within the four spatial scales (local catchment, network catchment, local buffer, and network buffer). Only disturbance groups that have greater than 5% of stream length in a given category are represented in this figure. Note that not all disturbance categories are available for each spatial scale; buffers have only urban...
thumbnail
Synopsis: The purpose of this model is to indicate potential habitat for olive-backed pocket mice (Perohnathus fasciatus) within the Milk River Basin. As this is a landscape level model with course variaqbles, it may not be directly applicable to other areas for site-specific analysis. Conclusions: Olive-backed pocket mice require high proportions of grassland habitat and low proportions of shrub cover. Sites with low densities of shrubs are preferred because they provide cover from large and aerial predators, such as owls. A threshold of below 40% shrub coverage represents ideal shrub cover proportions.
thumbnail
Resource managers are realizing the benefits of using geographic information systems to supply visual spactal data for use in making informed management decisions. This report details the ARC/INFO (ESRI, Redlands, CA) procedures used at the Environmental Management Technical Center in Onalaska, Wisconsin, to assist Upper Mississippi River National Wildlife and Fish Refuge mangers in the process of acquiring refuge land through a land exchange. Refuge managers required boundaries for both 430- and 500-acre parcels that included the most desirable land cover/use types. Hardcopy maps of the area showing the total acreage for each land cover/use type will be used during land exchange negotiations.
thumbnail
This ecoregion is composed of a core area of high, precipitous mountains with narrow crests and valleys flanked in some areas by dissected plateaus and open high mountains. The elevational banding pattern of vegetation is similar to that of the Southern Rockies (21) except that areas of aspen, interior chaparral, and juniper-pinyon and scrub oak are more common at middle elevations. This characteristic, along with a far lesser extent of lodgepole pine and greater use of the region for grazing livestock in the summer months, distinguish the Wasatch and Uinta Mountains ecoregion from the more northerly Middle Rockies (17).
thumbnail
This desert ecoregion extends from the Madrean Archipelago (79) in southeast Arizona to the Edwards Plateau (30) in south-central Texas. It is the northern portion of the southernmost desert in North America that extends more than 500 miles south into Mexico. It is generally a continuation of basin and range terrain that is typical of the Mojave Basin and Range (14) and Sonoran Basin and Range (81) ecoregions to the west, although the pattern of alternating mountains and valleys is not as pronounced. The mountain ranges are a geologic mix of Tertiary volcanic and intrusive granitic rocks, Paleozoic sedimentary layers, and some Precambrian granitic plutonic rocks. Outside the major river drainages, such as the Rio...
thumbnail
Similar to the Northeastern Highlands (58), the Northeastern Coastal Zone contains relatively nutrient poor soils and concentrations of continental glacial lakes, some of which are sensitive to acidification; however, this ecoregion contains considerably less surface irregularity and much greater concentrations of human population. Landforms in the region include irregular plains, and plains with high hills. Appalachian oak forests and northeastern oak-pine forests are the natural vegetation types. Although attempts were made to farm much of the Northeastern Coastal Zone after the region was settled by Europeans, land use now mainly consists of forests, woodlands, and urban and suburban development, with only some...
thumbnail
Stretching from Kentucky to Alabama, these open low mountains contain a mosaic of forest and woodland with some cropland and pasture. The eastern boundary of the ecoregion, along the more abrupt escarpment where it meets the Ridge and Valley (67), is relatively smooth and only slightly notched by small, eastward flowing streams. Much of the western boundary, next to the Interior Plateau (71), is more crenulated, with a rougher escarpment that is more deeply incised. The mixed mesophytic forest is restricted mostly to the deeper ravines and escarpment slopes, and the upland forests are dominated by mixed oaks with shortleaf pine. Ecoregion 68 has less agriculture than the adjacent Ecoregion 71. Coal mining occurs...
thumbnail
This physically and biologically diverse ecoregion covers the highly dissected ridges, foothills, and valleys of the Klamath and Siskiyou mountains. It also extends south in California to include the mixed conifer and montane hardwood forests that occur
thumbnail
The Northern Basin and Range consists of dissected lava plains, rocky uplands, valleys, alluvial fans, and scattered mountain ranges. Overall, it is cooler and has more available moisture than the Central Basin and Range (13) to the south. Ecoregion 80 is higher and cooler than the Snake River Plain (12) to the northeast in Idaho. Valleys support sagebrush steppe or saltbush vegetation. Cool season grasses, such as Idaho fescue and bluebunch wheatgrass are more common than in Ecoregion 13 to the south. Mollisols are also more common than in the hotter and drier basins of the Central Basin and Range (13) where Aridisols support sagebrush, shadscale, and greasewood. Juniper woodlands occur on rugged, stony uplands....
thumbnail
This mostly forested region, with dense concentrations of continental glacial lakes, is less rugged than the Northeastern Highlands (58) to the west and considerably less populated than Ecoregion 59 to the south. Vegetation here is mostly spruce-fir on the lowlands with some patches of maple, beech, and birch on the hills. Soils are predominantly frigid Spodosols. By contrast, the forests in the Northeastern Coastal Zone (59) to the south are mostly Appalacian oak or northeastern oak-pine and the soils are generally mesic Inceptisols and Entisols.
thumbnail
The Great Northern Landscape Conservation Cooperative (GNLCC) is a new enterprise, comprising agencies and organizations working together across landscapes and through science-management partnerships called Landscape Conservation Cooperatives. The intent to the GNLCC is to assist governments and interested organizations in conserving habitats that ensure the long-term resiliency of ecosystems that sustain priority species and maintain viable populations and habitats in the face of climate change and other threats.
thumbnail
The Upper Mississippi River System (UMRS) has been dramatically altered by changing land use and management practices within its basin. One consequence of these changes is the severe environmental problem of increased sedimentation in river backwater areas. The Long Term Resource Monitoring Program is addressing this problem by expanding and initiating new research of sediment movement in the UMRS. As part of its new research, this annotated bibliography was generated to identify, review, and provide information about studies associated with sediment transport and deposition in large river environments. It contains 275 citations and abstracts for works that were published primarily between 1970 and early 1995. A...


map background search result map search result map Landscape Patterns Environmental Quality Analysis - Presentation Flood reduction through wetand restoration: the Upper Mississippi River Basin as a case history. Olive-backed Pocket Mouse. Synthesis_Scope_of_Work Hydraulic retention devices in the Middle and Upper Mississippi River Geospatial application:  Refuge expansion acreage analysis Large river sediment transport and deposition:  An annotated bibliography Limnological monitoring on the Upper  Mississippi River System, 1993 1996: Lake City Field Station Recent observations of the distribution and status of freckled madtom and first record of spotted gar In Iowa Comparing the effects of local, landscape, and temporal factors on forest bird nest survival using logistic-exposure models The long-term resource monitoring program: insights into the Asian carp invasion of the Illinois River, Illinois, USA Basement domain map of the conterminous United States and Alaska (COPY07) Wasatch and Uinta Mountains Chihuahuan Deserts Northeastern Coastal Zone Southwestern Appalachians Klamath Mountains/California High North Coast Range Northern Basin and Range Acadian Plains and Hills Northeastern States Most Pervasive and Severe Disturbances Figure Limnological monitoring on the Upper  Mississippi River System, 1993 1996: Lake City Field Station Olive-backed Pocket Mouse. Geospatial application:  Refuge expansion acreage analysis Klamath Mountains/California High North Coast Range Acadian Plains and Hills Northeastern Coastal Zone Southwestern Appalachians Recent observations of the distribution and status of freckled madtom and first record of spotted gar In Iowa The long-term resource monitoring program: insights into the Asian carp invasion of the Illinois River, Illinois, USA Wasatch and Uinta Mountains Northern Basin and Range Chihuahuan Deserts Northeastern States Most Pervasive and Severe Disturbances Figure Flood reduction through wetand restoration: the Upper Mississippi River Basin as a case history. Hydraulic retention devices in the Middle and Upper Mississippi River Large river sediment transport and deposition:  An annotated bibliography Comparing the effects of local, landscape, and temporal factors on forest bird nest survival using logistic-exposure models Synthesis_Scope_of_Work Landscape Patterns Environmental Quality Analysis - Presentation Basement domain map of the conterminous United States and Alaska (COPY07)