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- Water
- Developed
- Barren
- Vegetated Natural Forest Upland
- Shrubland
Land use/Land coverITEMS TO BE DISCUSSED IN THIS SECTION: -What does the watershed look like? -What are the designations and terms? -What do the designations mean? -Where can I find these areas? -What are the top 10 most unique areas? -Where are major recreational areas of interest? L This data was collected by the USGS starting in the 1970’s using remote sensing and satellite photography. Remote sensing is the determination of a quantity from a distance, which is most commonly using satellites to determine the location and amounts of different.
This information can all be seen on maps at the end of this section. The description of categories and subcategories used in development of the land use and land cover layers are defined as follows: Water:Water is defined as either being open water or perennial ice/snow. Open water is defined as areas of open water, generally with less than 25 percent or greater cover of water (per pixel). Perennial ice/snow is defined as areas characterized by year-long cover of ice and/or snow. Developed:Developed areas are characterized by high percentage (approximately 30% or greater) of constructed materials (e.g. asphalt, concrete, buildings, etc) and are divided into low intensity residential, high intensity residential, and commercial/industrial/transportation. Low intensity residential includes areas with a mixture of constructed materials and vegetation. Constructed materials account for 30-80 percent of the cover. Vegetation may account for 20 to 70 percent of the cover. These areas most commonly include single-family housing units. Population densities will be lower than in high intensity residential areas. High intensity residential includes heavily built up urban centers where people reside in high numbers. Examples include apartment complexes and row houses. Vegetation accounts for less than 20 percent of the cover. Constructed materials account for 80-100 percent of the cover. Commercial/Industrial/Transportation is defined as infrastructure (e.g. roads, railroads, etc.) and all highways and all developed areas not classified as High Intensity Residential. Barren:Barren areas are characterized by bare rock, gravel, sad, silt, clay, or other earthen material, with little or no ""green"" vegetation present regardless of its inherent ability to support life. Vegetation, if present, is more widely spaced and scrubby than that in the "green" vegetated categories; lichen cover may be extensive. It is divided into the categories of bare rock/sand/clay, quarries/strip mines/gravel pits, and transitional. Bare Rock/Sand/Clay are perennially barren areas of bedrock, desert, pavement, scarps, talus, slides, volcanic material, glacial debris, and other accumulations of earthen material. Quarries/Strip Mines/Gravel Pits are defined as areas of extractive mining activities with significant surface expression. Transitional areas include regions of sparse vegetative cover (less than 25 percent that are dynamically changing from one land cover to another, often because of land use activities. Examples include forest clearcuts, a transition phase between forest and agricultural land, the temporary clearing of vegetation, and changes due to natural causes (e.g. fire, flood, etc.) Vegetated & Natural Forest Upland:Forested upland is characterized by tree cover (natural or semi-natural woody vegetation, generally greater than 6 meters tall); Tree canopy accounts for 25-100 percent of the cover. This category includes deciduous forest, evergreen forest, and mixed forest. Deciduous Forest is areas dominated by trees where 75 percent or more of the tree species shed foliage simultaneously in response to seasonal change. Evergreen Forest is defined as areas characterized by trees where 75 percent or more of the tree species maintain their leaves all year. Canopy is never without green foliage. Mixed Forest is dominated by trees where neither deciduous nor evergreen species represent more than 75 percent of the cover present. Shrubland:Shrubland is areas characterized by natural or semi-natural woody vegetation with aerial stems, generally less than 6 meters tall with individuals or clumps not touching to interlocking. Both evergreen and deciduous species of true shrubs, young trees, and trees or shrubs that are small or stunted because of environmental conditions are included. It encompasses only shrubland itself and is defined as areas dominated by shrubs; shrub canopy accounts for 25-100 percent of the cover. Shrub cover is generally greater than 25 percent when tree cover is less than 25 percent. Shrub cover may be less than 25 percent in cases when the cover of other life forms (e.g. herbaceous or tree) is less than 25 percent and shrubs cover exceeds the cover of the other life forms. Directory: faculty faculty -> Dsci 3870: Management Science faculty -> Handling Indivisibilities faculty -> Course overview faculty -> Curriculum vitae wei chen professor faculty -> Digital image warping faculty -> Samples of Elements Exam Question III contains All Prior Exam Qs III except faculty -> 【Education&Working Experience】 faculty -> References Abe, M., A. Kitoh and T. Yasunari, 2003: An evolution of the Asian summer monsoon associated with mountain uplift —Simulation with the mri atmosphere-ocean coupled gcm. J. Meteor. Soc. Japan, 81 faculty -> Ralph R. Ferraro Chief, Satellite Climate Studies Branch, noaa/nesdis faculty -> Unit IV text: Types of Oil, Types of Prices Grammar: that/those of, with revision Download 431.83 Kb. Share with your friends:
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and use refers to the human activities that are directly related to the land. The interpretations are based on a land use and land cover system developed for use with remotely sensed data. The hierarchical classification has two defined levels. Land