; Irrigation ; Lutte contre les crues ; Manitoba ; Minnesota ; North Dakota ; RedRiver ; Ressources en eau ; Régularisation ; Sol irrigable ; Vallée
The RedRivervalley is a homogeneous physical region that is partitioned between two countries and among two states and one province. Problems of water surpluses and water deficits are common to the valley. Flood protection is better developed
in the Canadian portion than in the American portion of the valley. State and provincial governments have promoted, with varying degree of success, an integrated approach to local water management.
Spatial and temporal variation of runoff of RedRiver Basin in Yunnan
China ; Climatic change ; Climatic data ; Evaporation ; Geographical information system ; Mountain ; Precipitation ; Runoff ; Spatial variation ; Stream ; Temperature ; Valley ; Watershed ; Yunnan
This paper studies the variation of runoff of RedRiver Basin and discusses the influence of corridor-barrier functions of valleys and mountains on variation of runoff by using GIS and statistic methods based on the monthly precipitation
, temperature and evaporation data from 1960 to 2000 at 32 meteorological stations in RedRiver Basin, and the annual runoff data of Yuanjiang River, Lixian River and Panlong River from 1956 to 2000. These 3 river basins are contrasted. Results and discussion.
[b1] Asian International Rivers Center, Yunnan University, Kunming, Chine
Valleys and river benches from the viewpoint of morphotectonics
Concept ; Fluvial processes ; Hydrogeology ; Valley
The geomorphological concepts on the formation of valleys and river benches applied until now have been based upon the viewpoints of dynamic and climatic geomorphology. This exogenous interpretation should be abandoned and an endogenous concept
The Late Wisconsinan savanna terrace in tributaries to the upper Mississippi River
The Savanna Terrace, composed of alternating red and gray clayey sediments of late Wisconsinan age, is the highest glaciofluvial-lacustrine deposit without a loess cover in the upper Mississippi valley. Chemical, physical, and mineralogical data
show that two different sources provided sediment. Radiocarbon dates obtained from the lower Illinois valley indicate that the terrace sediments were deposited sometime between about 13,100 and 9 500 years ago. Soils developed on the terrace
Aspects du bilan d'énergie de surface les plus importants pour le développement d'une fonte rapide des neiges au cours du printemps 1997 dans la RedRiverValley du Dakota du Nord et du Minnesota. La fonte rapide des neiges d'un amas
The evolution of the Vistula rivervalley between Cracow and Niepołomice in late Vistulian and Holocene times
Evolution of the Vistula rivervalley during the last 15 000 years, part IV
Alluvium ; Climatic variation ; Drainage network ; Fluvial processes ; Holocene ; Human impact ; Poland ; Quaternary ; Sedimentology ; Valley ; Valley floor evolution ; Wisła
This is a new synthesis of the evolution of the section of the Vistula rivervalley. There are changes in the channel patterns and parameters, sedimentological characteristics of the different alluvial deposits of different ages, the reflection
of both climatic fluctuation and human activity in the valley floor morphology and in alluvia. - (DG)
Escala espacial ; Fractal ; Geomorfometría ; Red de drenaje ; Valle
This article indicates the quantitative tools, with assistance of which it is possible to characterize the morphology (shape) of the valley network and determine their variability caused by the scale change. The monitored morphometric
characteristics (quantitative tools) have been applied to the paradigmatic examples of the schematic valley networks and have been analyzed in three scales. In order to analyze the valley networks, the most suitable are “valley junction angles” and “homogeneity
of various order valleys”, where the relevant values dropped while increasing the scale, but the normal (Gauss) distribution of values was preserved. - (EN)
The lower Colorado Rivervalley : a Pleistocene desert
Colorado RiverValley ; Domaine aride ; Etats-Unis ; Géographie de l'Amérique ; Histoire de la végétation ; Pléistocène supérieur ; Quaternaire zone chaude ; Végétation ; Zone subtropicale
A chronological sequence of plant macrofossil assemblages from twenty-five pack rat middens provides a record of desert scrub vegetation for most of the last 13,380 yr BP from a hyperarid portion of the lower Colorado RiverValley.
Late Holocene valley-bottom aggradation and erosion in the South Loup RiverValley, Nebraska
The chronology of aggradation and erosion is developed from ten radiocarbon ages. After discussing fluvial erosion and floodplain aggradation in the South Loup RiverValley, the paper reconstructs the late Holocene alluvial records of the North
and Middle Loup RiverValleys from published reports and articles.
for major logjams and rafts on Red, Atchafalaya, and Colorado Rivers on the Gulf Coast, which blocked navigation from tens to hundreds of kilometers in the 1800s. Results from Hurricane Rita suggest that blowdown into channels alone - not withstanding
blowdown elsewhere in the rivervalleys or along tributaries which could deliver large woody debris to the river - is sufficient to completely block channels, thus providing a plausible mechanism for initiating such (pre)historic log rafts.
Hurricane Rita which struck the US Gulf Coast near the Louisiana/Texas border in 2005, did not cause extensive river flooding. However, the storm did result in extensive forest damage and tree blowdown. High-resolution post-storm aerial photography
allowed an inventory of river bank trees blown into the channel along the lower Neches and Sabine Rivers of southeast Texas and southwest Louisiana. The Rita blowdown inventory also allowed an assessment of whether similar blowdown events could account
Holocene development of the River Lippe valley, Germany : a case study of anthropogenic influence
Channel geometry ; Fluvial terrace ; Germany ; Holocene ; Human impact ; Hydraulic works ; Meander ; Model ; North Rhine Westfalia ; Palaeohydrology ; River bed ; Stream
This article describes the Inselterrasse and Aue in detail and explains the Holocene development of the Lippe valley floor morphology, which is atypical for a central European river. It is shown that morphological evolution of the Lippe valley floor
is a special case of anthropogenic influence that might be an interesting addition to previous studies of human impacts on palaeohydrology, channel change and valley floor development (Gregory, 1995; Brown, 1996; Kalicki,1996).
Outlines of the late Quaternary history of the Drentsche Aa Valley (Drente, The Neteherlands)
An outline is given of the geomorphology and Late Quaternary history of the Drentsche Aa valley. The valley sediments are subdivided in fluvial, slope and aeolian sediments on lithological arguments. The vertical succession of the rivervalley
sediments demonstrates a decreasing fluvial activity during the Weichselian. Tentatively four erosion phases are distinguished in the valley system.
Rivervalleys as elements of the system of protected areas in the Lublin administrative district
Environment ; Lublin ; Nature conservation ; Poland ; Protected area ; Stream ; Valley
This article presents results of the research on the protection of the rivervalleys of Lublin Voivodeship. To determine the degree of protection of the rivervalleys cartometric methods based on the available maps and the Ministry of Environment
the protected areas, there are 70% of the length of the river. In this system of protection, fragmentation of the valleys is significant. None of the major rivers of the region, including the Vistula and the Bug, is not protected throughout in their length
and Office of Spatial Planning in Lublin data are used. The results of researches made that the protected landscape areas are element of the system of protected areas, which includes the highest percentage of river length in region (over 13%). Outside
Calle ; Casco urbano ; Esfahan ; Irán ; Khuzestan ; Red urbana ; Relieve ; Suburbio ; Yazd
This article shows that landforms have significant effects on the city shape and street patterns of the fast-growing Iranian cities of Dezful (a river) and Khorramabad (mountains and valleys), but no clear effects on the cities of Yazd and Nain
Influence of logjam-formed hard points on the formation of valley-bottom landforms in an old-growth forest valley, Queets River, Washington, USA
Floodplain ; Fluvial landform ; Forest ; Impact ; Terrace ; United States of America ; Valley ; Washington State
Des enquêtes de terrain et la datation au carbone 14 des logjams fossiles dans une vieille forêt de vallée démontrent la formation de points durs résistants à l'érosion dans la plaine d'inondation de Queets River, Washington.
Análisis de regresión ; Balance sedimentario ; Campo árido ; Cuenca hidrográfica ; Erosión de las riberas ; Geomorfometría ; Hidrología ; Hipsometría ; Jordania ; Oued ; Red de drenaje
This study addresses the morphometric variables that determine the sediment yield in Wadi Al-Arja through the analysis of the impact of different morphometric characteristics along the course of the valley on its sediment yield, as well
as the analysis of spatial and formal dimensions and morphologies of the basin and its relationship to the sediment yield. The study also addresses the size of variation in the volume of sediment yield of the river tributaries that make up the water network
of the valley under the differences of its morphometric and hydrological characteristics. The results of the step-wise regression analysis confirmed the importance of the morphometric and hydrological variables, and plant coverage in interpreting the variation
in the size of the sediment yield of the river tributaries of different stream order in Wadi Al-Arja basin.