Terrain: Difference between revisions
Content deleted Content added
ClueBot NG (talk | contribs) m Reverting possible vandalism by 174.95.213.141 to version by Io Herodotus. Report False Positive? Thanks, ClueBot NG. (3804998) (Bot) |
m References after punctuation per WP:REFPUNCT, WP:CITEFOOT, WP:PAIC + other fixes |
||
| Line 3: | Line 3: | ||
{{About||the fruit|Terret gris|the store|Urban Outfitters}} |
{{About||the fruit|Terret gris|the store|Urban Outfitters}} |
||
{{ |
{{More citations needed|date=July 2012}} |
||
[[File:AYool topography 15min.png|thumb|Present-day [[Earth]] [[altimetry]] and [[bathymetry]]. Data from the [[National Geophysical Data Center]]'s [http://www.ngdc.noaa.gov/seg/fliers/se-1104.shtml TerrainBase Digital Terrain Model].]] |
[[File:AYool topography 15min.png|thumb|Present-day [[Earth]] [[altimetry]] and [[bathymetry]]. Data from the [[National Geophysical Data Center]]'s [http://www.ngdc.noaa.gov/seg/fliers/se-1104.shtml TerrainBase Digital Terrain Model].]] |
||
[[File:Maps-for-free Sierra Nevada.png|thumb|Relief map of [[Sierra Nevada (Spain)|Sierra Nevada]], [[Spain]]]] |
[[File:Maps-for-free Sierra Nevada.png|thumb|Relief map of [[Sierra Nevada (Spain)|Sierra Nevada]], [[Spain]]]] |
||
| Line 15: | Line 15: | ||
The understanding of terrain is critical for many reasons: |
The understanding of terrain is critical for many reasons: |
||
* The terrain of a region largely determines its suitability for human settlement: ''flatter,'' alluvial plains tend to have better farming soils with steeper, rockier uplands. |
* The terrain of a region largely determines its suitability for human settlement: ''flatter,'' alluvial plains tend to have better farming soils with steeper, rockier uplands. |
||
* In terms of [[environmental quality]], [[agriculture]], [[hydrology]] and other interdisciplinary sciences<ref name=baker2011>Baker, N.T., and Capel, P.D., 2011, "Environmental factors that influence the location of crop agriculture in the conterminous United States": U.S. Geological Survey Scientific Investigations Report 2011–5108, 72 p.</ref> |
* In terms of [[environmental quality]], [[agriculture]], [[hydrology]] and other interdisciplinary sciences;<ref name=baker2011>Baker, N.T., and Capel, P.D., 2011, "Environmental factors that influence the location of crop agriculture in the conterminous United States": U.S. Geological Survey Scientific Investigations Report 2011–5108, 72 p.</ref> understanding the terrain of an area assists the understanding of [[drainage divide|watershed boundaries]], [[drainage basin|drainage characteristics]],<ref>Brush, L. M. (1961). "Drainage basins, channels, and flow characteristics of selected streams in central Pennsylvania" (pp. 1-44) (United States, U.S. Department of the Interior, GEOLOGICAL SURVEY). Washington D.C.: UNITED STATES GOVERNMENT PRINTING OFFICE. Retrieved October 29, 2017, from https://pubs.usgs.gov/pp/0282f/report.pdf</ref> [[drainage system (geomorphology)|drainage systems]], [[hydrogeology|groundwater systems]], [[drainage|water movement]], and impacts on [[water quality#Environmental water quality|water quality]]. Complex arrays of relief data are used as input parameters for [[hydrology transport model]]s (such as the [[SWMM]] or [[DSSAM Model]]s) to allow prediction of river [[water pollution|water quality]]. |
||
* Understanding terrain also supports [[soil conservation]], especially in agriculture. [[Contour ploughing]] is an established practice enabling [[sustainable agriculture]] on sloping land; it is the practice of ploughing along lines of equal elevation instead of up and down a slope. |
* Understanding terrain also supports [[soil conservation]], especially in agriculture. [[Contour ploughing]] is an established practice enabling [[sustainable agriculture]] on sloping land; it is the practice of ploughing along lines of equal elevation instead of up and down a slope. |
||
* Terrain is [[military|militarily]] critical because it determines the ability of [[armed forces]] to take and hold areas, and move [[troop]]s and material into and through areas. An [[Military geography#Types of terrain|understanding of terrain]] is basic to both defensive and offensive strategy. |
* Terrain is [[military|militarily]] critical because it determines the ability of [[armed forces]] to take and hold areas, and move [[troop]]s and material into and through areas. An [[Military geography#Types of terrain|understanding of terrain]] is basic to both defensive and offensive strategy. |
||
| Line 29: | Line 29: | ||
[[Geomorphology]] is in large part the study of the formation of terrain or topography. Terrain is formed by concurrent processes: |
[[Geomorphology]] is in large part the study of the formation of terrain or topography. Terrain is formed by concurrent processes: |
||
* [[Geology|Geological]] [[:Category:Geological processes|processes]]: Migration of [[tectonic plate]]s, [[Fault (geology)|faulting]] and [[Fold (geology)|folding]], [[mountain formation]], [[volcanic]] eruptions, etc. |
* [[Geology|Geological]] [[:Category:Geological processes|processes]]: Migration of [[tectonic plate]]s, [[Fault (geology)|faulting]] and [[Fold (geology)|folding]], [[mountain formation]], [[volcanic]] eruptions, etc. |
||
* [[ |
* [[Erosion]]al [[erosion#Physical processes|processes]]: [[Glacier#Glacial geology|glacial]], [[fluvial#Fluvial processes|water]], [[Aeolian processes#wind erosion|wind]], [[weathering#Chemical weathering|chemical]] and gravitational ([[mass wasting|mass movement]]); such as [[landslide]]s, [[downhill creep]], [[Landslide classification#Flows|flows]], [[Slump (geology)|slumps]], and [[landslide classification#falls|rock falls]]. |
||
* [[Impact event|Extraterrestrial]]: [[meteorite]] [[impact crater|impacts]]. |
* [[Impact event|Extraterrestrial]]: [[meteorite]] [[impact crater|impacts]]. |
||
Revision as of 08:19, 15 January 2021
 | This article needs additional citations for verification. (July 2012) |
.jpg)
Terrain or relief (also topographical relief) involves the vertical and horizontal dimensions of land surface. The term bathymetry is used to describe underwater relief, while hypsometry studies terrain relative to sea level. The Latin word terra (the root of terrain) means "earth."
In physical geography, terrain is the lay of the land. This is usually expressed in terms of the elevation, slope, and orientation of terrain features. Terrain affects surface water flow and distribution. Over a large area, it can affect weather and climate patterns.
Importance
The understanding of terrain is critical for many reasons:
- The terrain of a region largely determines its suitability for human settlement: flatter, alluvial plains tend to have better farming soils with steeper, rockier uplands.
- In terms of environmental quality, agriculture, hydrology and other interdisciplinary sciences;[1] understanding the terrain of an area assists the understanding of watershed boundaries, drainage characteristics,[2] drainage systems, groundwater systems, water movement, and impacts on water quality. Complex arrays of relief data are used as input parameters for hydrology transport models (such as the SWMM or DSSAM Models) to allow prediction of river water quality.
- Understanding terrain also supports soil conservation, especially in agriculture. Contour ploughing is an established practice enabling sustainable agriculture on sloping land; it is the practice of ploughing along lines of equal elevation instead of up and down a slope.
- Terrain is militarily critical because it determines the ability of armed forces to take and hold areas, and move troops and material into and through areas. An understanding of terrain is basic to both defensive and offensive strategy.
- Terrain is important in determining weather patterns. Two areas geographically close to each other may differ radically in precipitation levels or timing because of elevation differences or a "rain shadow" effect.
- Precise knowledge of terrain is vital in aviation, especially for low-flying routes and maneuvers (see terrain collision avoidance) and airport altitudes. Terrain will also affect range and performance of radars and terrestrial radio navigation systems. Furthermore, a hilly or mountainous terrain can strongly impact the implementation of a new aerodrome and the orientation of its runways.
Relief
Relief (or local relief) refers specifically to the quantitative measurement of vertical elevation change in a landscape. It is the difference between maximum and minimum elevations within a given area, usually of limited extent.[3] The relief of a landscape can change with the size of the area over which it is measured, making the definition of the scale over which it is measured very important. Because it is related to the slope of surfaces within the area of interest and to the gradient of any streams present, the relief of a landscape is a useful metric in the study of the Earth's surface. Relief energy, which may be defined inter alia as "the maximum height range in a regular grid",[4] is essentially an indication of the ruggedness or relative height of the terrain.
Geomorphology
Geomorphology is in large part the study of the formation of terrain or topography. Terrain is formed by concurrent processes:
- Geological processes: Migration of tectonic plates, faulting and folding, mountain formation, volcanic eruptions, etc.
- Erosional processes: glacial, water, wind, chemical and gravitational (mass movement); such as landslides, downhill creep, flows, slumps, and rock falls.
- Extraterrestrial: meteorite impacts.
Tectonic processes such as orogenies and uplifts cause land to be elevated, whereas erosional and weathering processes wear the land away by smoothing and reducing topographic features.[5] The relationship of erosion and tectonics rarely (if ever) reaches equilibrium.[6][7][8] These processes are also codependent, however the full range of their interactions is still a topic of debate.[9][10][11][12][13]
Land surface parameters are quantitative measures of various morphometric properties of a surface. The most common examples are used to derive slope or aspect of a terrain or curvatures at each location. These measures can also be used to derive hydrological parameters that reflect flow/erosion processes. Climatic parameters are based on the modelling of solar radiation or air flow.
Land surface objects, or landforms, are definite physical objects (lines, points, areas) that differ from the surrounding objects. The most typical examples airlines of watersheds, stream patterns, ridges, break-lines, pools or borders of specific landforms.
See also
- Applications of global navigation satellite systems (GNSS)
- Cartographic relief depiction (2D relief map)
- Digital terrain model
- Geographic information system (GIS)
- Geomorphometry
- Hypsometry
- Isostasy
- Physical terrain model
- Relief ratio
- Subterranea
- Terrain awareness and warning system
- Terrane
- Topography
References
- ^ Baker, N.T., and Capel, P.D., 2011, "Environmental factors that influence the location of crop agriculture in the conterminous United States": U.S. Geological Survey Scientific Investigations Report 2011–5108, 72 p.
- ^ Brush, L. M. (1961). "Drainage basins, channels, and flow characteristics of selected streams in central Pennsylvania" (pp. 1-44) (United States, U.S. Department of the Interior, GEOLOGICAL SURVEY). Washington D.C.: UNITED STATES GOVERNMENT PRINTING OFFICE. Retrieved October 29, 2017, from https://pubs.usgs.gov/pp/0282f/report.pdf
- ^ Summerfield, M.A., 1991, Global Geomorphology, Pearson, 537 p. ISBN 9780582301566
- ^ African Landscapes: Interdisciplinary Approaches, edited by Michael Bollig, Olaf Bubenzer. Cologne: Springer, 2009, p. 48.
- ^ Strak, V., Dominguez, S., Petit, C., Meyer, B., & Loget, N. (2011). Interaction between normal fault slip and erosion on relief evolution; insights from experimental modelling. Tectonophysics, 513(1-4), 1-19. doi:10.1016/j.tecto.2011.10.005
- ^ Gasparini, N., Bras, R., & Whipple, K. (2006). Numerical modeling of non–steady-state river profile evolution using a sediment-flux-dependent incision model. Special Paper - Geological Society of America, 398, 127-141. doi:10.1130/2006.2398(08)
- ^ Roe, G., Stolar, D., & Willett, S. (2006). Response of a steady-state critical wedge orogen to changes in climate and tectonic forcing. Special Paper - Geological Society of America, 398, 227-239. doi:10.1130/2005.2398(13)
- ^ Stolar, D., Willett, S., & Roe, G. (2006). Climatic and tectonic forcing of a critical orogen. Special Paper - Geological Society of America, 398, 241-250. doi:10.1130/2006.2398(14)
- ^ Wobus, C., Whipple, K., Kirby, E., Snyder, N., Johnson, J., Spyropolou, K., Sheehan, D. (2006). Tectonics from topography: Procedures, promise, and pitfalls. Special Paper - Geological Society of America, 398, 55-74. doi:10.1130/2006.2398(04)
- ^ Hoth, S., Adam, J., Kukowski, N., & Oncken, O. (2006). Influence of erosion on the kinematics of bivergent orogens: Results from scaled sandbox simulations. Special Paper - Geological Society of America, 398, 201-225. doi:10.1130/2006.2398(12)
- ^ Bonnet, C., J. Malavieille, and J. Mosar (2007), Interactions between tectonics, erosion, and sedimentation during the recent evolution of the Alpine orogen: Analogue modeling insights, Tectonics, 26, TC6016, doi:10.1029/2006TC002048
- ^ University of Cologne. "New insights into the relationship between erosion and tectonics in the Himalayas." ScienceDaily. ScienceDaily, 23 August 2016. <www.sciencedaily.com/releases/2016/08/160823083555.htm>
- ^ King, G., Herman, F., & Guralnik, B. (2016). Northward migration of the eastern himalayan syntaxis revealed by OSL thermochronometry. Science, 353(6301), 800-804. doi:10.1126/science.aaf2637
Further reading
- Boots on the ground. On military terrain from the perspective of the combat soldier. By Professor Derek Gregory
External links
The dictionary definition of terrain at Wiktionary