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Topic: Thalweg


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In the News (Fri 17 Feb 12)

  
  What Can Thalweg Profiles Tell Us? - Summer 1999
A thalweg profile is constructed by surveying the elevation of the channel bed in a downstream direction along the deepest part of the channel.
Thalweg profiles are also useful in combination with cross-sectional profiles or channel planform analysis to determine the vertical dimension of channel morphologic features.
An analysis of thalweg profiles in the Redwood Creek basin surveyed between 1977 and 1997 showed there were statistically significant differences in the distributions of residual water depths and the variation of channel bed elevations in streams impacted by high sediment loads.
www.watershed.org /news/sum_99/11_thalweg_profiles.htm   (3829 words)

  
 Britain.tv Wikipedia - Thalweg
Thalweg (a German word compounded from Thal (nowadays spelled Tal), valley, and Weg, way) is a term adopted into English usage for geography and geomorphology.
The thalweg principle is the principle of determining national boundaries at the thalweg of a river separating two states.
A thalweg in geology is a line representing the profile of a land surface, drawn as a series of cross-sections that crosses all contour lines at right angles.
www.britain.tv /wikipedia.php?title=Thalweg   (220 words)

  
 Sugar Creek Monitoring Sites | NRCS NWMC
In June 1968, a thalweg survey was conducted to record effects from a storm on April 12, 1967 whose mean daily flow upstream at the Gracemont Gage was 1200 cubic feet per second (cfs).
In June 1968, a thalweg survey was conducted to record effects from the April 12, 1967 storm, that had a mean daily flow recorded at the Gracemont Gage of 1,200 cfs.
Thalweg measurements were not conducted specifically at cross section #2, downstream and upstream measurements indicate no aggradation or degradation in the reach, therefore, it is assumed that thalweg elevation remained at ~1155.7 feet amsl.
wmc.ar.nrcs.usda.gov /technical/HHSWR/Sugarcreek/scurvemain.html   (2779 words)

  
 First World War.com - Primary Documents - Treaty of Bucharest, 7 May 1918: Articles 10-12
The Danube frontier between the territories ceded to Bulgaria and Roumania follows the thalweg of the river.
Roumania cedes to the Allied Powers the part of the Dobrudja situated to the north of the new frontier line described in paragraph a, down to the Danube and exactly between the forking of the river and the Black Sea even to St. George's Arm.
The details regarding the determination of the thalweg must be agreed upon between the interested Powers immediately after the signing of the peace treaty; the delimitation will take place in the autumn of 1918 at low-water mark.
www.firstworldwar.com /source/bucharest1918ch3.htm   (915 words)

  
 KGS--Kansas River Corridor--Fluvial Hydraulics
The thalweg is a line connecting the deepest parts of the channel.
Channel cross sections are used to monitor changes in the channel morphology (thalweg and topwidth) and to calculate relationships between discharge and water depth.
The thalweg profile was lowered almost everywhere (5 feet [1.5 m] is a typical value), with the exception of some cross sections between river miles 12 and 20, which registered some aggradation.
www.kgs.ku.edu /Publications/KR/kr_hydro.html   (8344 words)

  
 Tucson Weekly : Books : Confessional Woes
She writes a paper on Shakespeare and "type[s] in cold blood" the word "thalweg." Di Prisco, with two books of poetry to his credit, and hence Brother Eli share an enchantment with words.
A thalweg is the deepest part of the valley channel where the water flows.
The thalweg, something he's lacked for as long as he can remember, takes on special importance for Brother Eli.
www.tucsonweekly.com /gbase/Books/Content?oid=oid:44583   (726 words)

  
 Publikationen Jussi Baade (1990-1994)(Abstracts)
Most of the sediment mobilized by soil erosion is derived from small drainageways on the fields where overland flow and interflow or returnflow concentrates and triggers ephemeral gully erosion or thalweg erosion, respectively.
It was calculated that inside of the catchment of gauge station 18 (705 ha) thalweg erosion accounts for 20% of the soil eroded.
But these on-field damages are concentrated at the bottom of the thalweg, which normally means that the farmer is not that much concerned about them.
www.geogr.uni-jena.de /~cub/jb1994eng.html   (751 words)

  
 The situation
Erosion phenomena are linear and generally confined to the thalweg axis, although they can also appear on the headlands (ends of fields) or on any lines of concentration between plots.
Soil losses are always confined to the thalweg, but vary greatly, ranging between 0 and 500 m³/km² per year (Ouvry 1992).
Ludwig, Boiffin and Masclet (1992) estimated the volume of the rills to be 100.8 m³ during the winter of 1988-89.
www.fao.org /docrep/T1765E/t1765e16.htm   (2135 words)

  
 JUDGMENT: CASE CONCERNING KASIKILI/SEDUDU ISLAND (BOTSWANA/NAMIBIA) - 13 DECEMBER 1999   (Site not responding. Last check: 2007-10-20)
The Court notes that various definitions of the term "thalweg" are found in treaties delimiting boundaries and that the concepts of the thalweg of a watercourse and the centre of a watercourse are not equivalent.
The word "thalweg" has variously been taken to mean "the most suitable channel for navigation" on the river, the line "determined by the line of deepest soundings", or "the median line of the main channel followed by boatmen travelling downstream".
In Botswana's view, it is to be found "on the basis of the thalwegs in the northern and western channel of the Chobe", whereas in Namibia's view, it "lies in the centre (that is to say thalweg) of the southern channel of the Chobe River".
www.icj-cij.org /icjwww/idocket/ibona/ibonaJudgments/ibona_ijudgment_19991213.htm   (14327 words)

  
 FindLaw for Legal Professionals - Case Law, Federal and State Resources, Forms, and Code
The case is controlled by the island exception to the rule of the thalweg.
The latter rule specifies that the river boundary between States lies along the main downstream navigational channel, or thalweg, and moves as the channel changes with the gradual processes of erosion and accretion.
Mississippi, 202 U.S. Though there are exceptions, the rule is that the river boundary between States lies along the main downstream navigational channel, or thalweg, and moves as the channel changes with the gradual processes of erosion and accretion.
caselaw.lp.findlaw.com /scripts/getcase.pl?court=US&vol=000&invol=u10238   (2031 words)

  
 THALWEG (ein deutsches... - Online Informationsartikel ungefähr THALWEG (ein deutsches...
THALWEG (ein deutsches Wort zusammengesetzt von Thal, von der Senke und von YPeg, von der Weise)
THALWEG (ein deutsches Wort zusammengesetzt von Thal, von See also:
End of Article: THALWEG (ein deutsches Wort zusammengesetzt von Thal, von der Senke und von YPeg, von der Weise)
encyclopedia.jrank.org /de/TAN_THE/THALWEG_ein_deutsches_Wort_zusa.html   (389 words)

  
 Conjunctive Use Without Management:Overdraft and Overdraft-Related Problems
During the period 1950 through 1975, the water table steadily declined in much of the Cache Creek sub-basin, in the Lower Cache-Putah sub-basin and on the western side of the Colusa sub-basin (Scott, et al., 1975; DWR, 1961).
Heavy pumping, coincident with the lowering of the Cache Creek thalweg from aggregate mining, was responsible for declines in the Hungry Hollow area, in the Yolo/Woodland area and in the areas on both sides of the Creek from Esparto Bridge to Yolo (Wahler Associates, 1981).
Since 1975, with the ordinance on in-stream mining to protect the thalweg, and introduction of supplemental Indian Valley surface supplies in the Hungry Hollow area, declining water levels have been reversed, or stabilized in the part of the Cache Creek sub-basin west of the Plainfield Ridge.
www.dcn.davis.ca.us /dcn/projects/conjunctiveuse/chapt3ef.html   (1086 words)

  
 Tutorial on Geospatial representation of river channels
Selecting the new initial centerline is necessary because the Thalweg layer already has one feature in it and if there are more than one features in the thalweg layer, the program works with the selected feature, if selected.
Since the first feature in the thalweg feature class is the thalweg located by the first approach, it is necessary to select the initial centerline digitized in the second approach.
After the thalweg is located, the program will display the same message box that was displayed with the first approach.
www.crwr.utexas.edu /gis/gishydro03/Channel/Channels.htm   (2142 words)

  
 2000, Pirmez et al.
Where the rates of tectonic deformation are comparable to the sediment flux, the thalweg profile smoothes irregularities but reflects, in part, the motion of active structures, as illustrated by intra-slope channels in the Gulf of Mexico and offshore Nigeria.
Disruption of the equilibrium profile occurs when the rate of tectonic deformation exceeds the sediment flux or when there is a rapid change in the sediment flux compared with the prevailing flow conditions.
These include thalweg downcutting and meander cut-offs updip of knickpoints, development of distributary channels and sheets as aggradation progresses downdip, and channel damming and redirection associated with down-to-the-shelf normal faults and folds.
www.gcssepm.org /pubs/2000_ab_56.htm   (393 words)

  
 Stream Flow Dynamics   (Site not responding. Last check: 2007-10-20)
Students will produce a vertical profile of a stream and be able to map as well as define thalweg, point bar, and cut bank.
At the cut bank the stream is eroding, at its deepest part (the thalweg) the stream is transporting sediment and it is depositing sediment on the point bar.
We are going to measure the profile of a stream, determine its current velocity at various points and depths and examine the sediment on the stream bottom.
www.beloit.edu /~SEPM/Earth_Works/Stream_Flow.html   (754 words)

  
 thalweg aman musique bretonne de bretagne celtique en telechargement
Thalweg : mot désignant la ligne d'écoulement des eaux, le point de rencontre imaginaire entre deux montagnes.
Thalweg fait alors figure d'un pionnier qui voyage entre Cornouaille et Kabylie, jetant un pont entre tradition et modernité.
Thalweg, mot allemand, de tal (vallée) et de weg (chemin).
www.gwerz.com /disques/artistes/thalweg-aman.htm   (443 words)

  
 The Sea Ranch Association Soundings - Winter, 2000
A thalweg profile is created by measuring the elevation and distance of those points from a fixed reference point.
The LWD measurements, as with the thalweg profile, correlate with the distance of the monitoring reach.
The relationship between the thalweg profile and LWD is shown in the diagram.
www.tsra.org /archives/Archive66.htm   (12119 words)

  
 METEO FRANCE - thalweg ou talweg
La configuration topographique inverse d'un thalweg est celle qui est associée aux régions anticycloniques de l'atmosphère et s'appelle une dorsale.
Enfin, diverses catégories de thalwegs caractérisent la propagation non de perturbations tempérées — où ils se déplacent d'ouest en est —, mais de dépressions implantées dans le courant général d'est de la zone intertropicale : on peut citer entre autres, parmi ces thalwegs se déplaçant généralement d'est en ouest, les
Comme le montre ce dernier cas, le terme de "thalweg" convient aussi pour la description des saisons climatiques, de même qu'il peut servir à décrire des situations aux échelles moyennes.
www.meteofrance.com /FR/glossaire/designation/837_curieux_view.jsp   (317 words)

  
 THALWEG (a German word... - Online Information article about THALWEG (a German word...
Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.
THALWEG (a German word compounded from Thal, valley, and YPeg, way)
End of Article: THALWEG (a German word compounded from Thal, valley, and YPeg, way)
encyclopedia.jrank.org /TAV_THE/THALWEG_a_German_word_compounde.html   (191 words)

  
 Location of the Thalweg of the Colorado River prior to the Impoundment of Lake Mead   (Site not responding. Last check: 2007-10-20)
Location of the Thalweg of the Colorado River prior to the Impoundment of Lake Mead
This ArcView GIS overlay indicates the position of the thalweg of the Colorado River prior to the impoundment of Lake Mead.
This state boundary is assumed to represent the thalweg of the Colorado River prior to the impoundment of Lake Mead.
pubs.usgs.gov /of/2003/of03-320/metadata/bounds/thalwegmeta.htm   (796 words)

  
 Location of the Thalweg of the Colorado River prior to the Impoundment of Lake Mead
Lake Mead is a large interstate reservoir located in the Mojave Desert of southeastern Nevada and northwestern Arizona.
Away from the river beds that are now covered with post-impoundment sediment, pre-impoundment alluvial deposits and rock outcrops are still exposed on the lake floor.
Twichell, David C., 2003, Location of the Thalweg of the Colorado River prior to the Impoundment of Lake Mead:.
pubs.usgs.gov /of/2003/of03-320/metadata/bounds/thalwegfaq.htm   (1086 words)

  
 River Channel Morphology Model
The RCMM uses the left bank of the river channel, and based on its curvature, the thalweg, cross-sections, and profile-lines are generated.
The thalweg location is multiplied with the width of the channel to locate the actual thalweg on the map.
RCMM uses the thalweg location relative to the left bank, and creates cross-sections as a combination of two beta distributions.
www.crwr.utexas.edu /gis/gishydro04/Modeling/RiverChannel.htm   (2246 words)

  
 Louzine.net, collectif d'artistes : Thalweg
THALWEG a été créé en janvier 2000 par des musiciens de plusieurs groupes travaillant à l'Usine d'Arcueil, réunis par leur grand désir d'expérimenter le mixage des musiques maghrébines et celtiques.
Aujourd’hui Thalweg se métamorphose en fusionnant son répertoire avec celui de Cheikh Sidi Bémol (alias Hocine Boukella).
C’est tout cela: Mélodies, textes et rythmes endiablés, qui fait de THALWEG un groupe de référence dans l’univers musical de la world music.
www.louzine.net /thalweg.htm   (273 words)

  
 Mapping Turbidite System Pathways on the Lousiana Continental Slope with GLORIA and Multibeam Bathymetry   (Site not responding. Last check: 2007-10-20)
Yellow lines marks the location of the thalweg of Bryant Canyon that is shown in the adjacent plot.
Green line on the adjacent shaded-relief image shows location of the thalweg of the Eastern system, yellow line shows location of the Bryant Canyon system, and orange line shows location of the westward extension of the Bryant Canyon system.
Note the abrupt changes in gradient where the thalweg crosses the salt-withdrawal basins.
kai.er.usgs.gov /regional/contusa/gomex/centgulf/lcs/aapg97/index.html   (811 words)

  
 Take Our Word For It, page two, Words to the Wise
An uncommon word in everyday parlance, it is pronounced "tall-vegg", which should give you a clue as
The German form is also thalweg (or talweg, the reformed German spelling), and it is formed from thal "valley" (cognate with English dale) and weg "way".
Now, the next time a friend or colleague uses thalweg in conversation you will be well equipped to provide its etymology.
www.takeourword.com /TOW114/page2.html   (1065 words)

  
 Silver Creek Restoration, Site 2
Flows should be deflected towards the center of the stream to move the thalweg away from the banks.
The thalweg is the deepest part of the flow that also carries the majority of the erosive energy.
Log barbs are used to deflect this energy.
www.mountainvisions.com /~SilverCreek/site2pan.html   (53 words)

  
 [No title]
b) (5 pts) In order to continue your answer you draw a meandering stream, labelling the thalweg (i.e., the region of greatest depth and velocity), point bar deposits, and regions of greatest bank erosion.
Thalweg stays near the outside of meanders; point bars form on the inside of meanders, greatest bank erosion occurs on the outside of meanders (near thalweg).
Oxbow lakes form when the outside of two meanders meet each other due to erosion, and river takes shortest route to get downhill.
www.es.ucsc.edu /~es10/classnotes/test2.key.html   (1404 words)

  
 THALWEG
Fusion de musiciens « résidents » qui se sont peu à peu investis dans l'aventure, Thalweg incarne désormais des sonorités venues de la musique du Maghreb, de la musique traditionnelle et du jazz.
Thalweg : quand le Bendir, le Tin Whistle (flûte irlandaise) et la Bombarde, créent une musique pionnière, jetant un lien entre tradition et modernité.
Porté par Samy Chiboub, le batteur, ce projet a vu le jour en janvier 2000 en prenant corps au sein de l'Association l'Usine.
www.berberescope.com /groupe_thalweg.htm   (752 words)

  
 SEMP - What Is the “Thalweg Principle”   (Site not responding. Last check: 2007-10-20)
The Shatt al Arab (Canal of the Arab, henceforth Shatt) is a 120-mile tidal river that begins at the confluence of the freshwater Tigris and Euphrates rivers in southern Iraq and ends at the head of the Persian Gulf.
In 1975, Iraq and Iran met during the Organization of Petroleum Exporting Countries (OPEC) in Algiers to sign the so-called Algiers Accord, which recognized the line running down the middle of the bottom of the murky Shatt, in the mud, as the official border between Iraq and Iran.
This line, called the thalweg (a German word compounded from “thal”, valley, and “weg”, way), joins the lowest points along the entire length of a streambed or valley.
www.semp.us /biots/biot_152.html   (640 words)

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