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Showing 1 to 20 of 46 for “"Backwater"”.
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Geomorphic History of the Atchafalaya Backwater Area: Upper Deltaic Plain Development
… reconstruction within the Atchafalaya Backwater Area of the upper deltaic plain of the Mississippi River has led to the recognition of a complex network of distributary development related to three distinct distributary systems that formed in the upper deltaic plain over the past 2500 …
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Peripheral backwater or innovative upland? : patterns of Franciscan patronage in renaissance Perugia, c. 1390 - 1527
In 1400, Perugia had little home-grown artistic talent and relied upon foreign painters to provide its major altarpieces. A century later, this situation had been reversed with Perugino, Pintoricchio and Raphael all active in the city. By investigating commissioning patterns III Franciscan …
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Ecological Limitations for Southern Wild Rice Associated with Backwater Lakes of the Illinois and Upper Mississippi River Valleys
… L.var. aquatica) populations were common in backwater lakes throughout the Illinois River Valley; however, only a single population was documented in this region between 2001 and 2007. This single population, located in Spring Lake near Pekin, Illinois, provided seed for this study. After …
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A Probabilistic Model of A Floodplain Forest: Prediction of Changes in Species Distribution Due to Variable Backwater Conditions During Reservoir Operation
Made available in DSpace on 2014-12-11T18:28:20Z (GMT). No. of bitstreams: 1 7212167.pdf: 3594898 bytes, checksum: 7d6e66efb037fba52a90b52b0293829e (MD5) Previous issue date: 1971
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Effects of Hydrologic Connection on Physicochemical Conditions and Algal Properties in Backwaters of the Lower Mississippi River
… remain numerous secondary channels and other backwater sites with which the river is hydrologically connected on a seasonal basis. In this study, the relationships of surface hydrologic connection with the main channel of the Lower Mississippi River to limnological properties and development …
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Seasonal Investigation of Native Fishes and Their Habitats in Missouri River and Yellowstone River Backwaters
… and impoundment. Ecologists have assumed that backwaters are a critical habitat component for certain life stages of native fishes; however, documented relationships are limited. During this study, I monitored fishes, invertebrates, and habitats to help determine the importance of backwaters to …
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Larval fish abundance and habitat associations in backwaters and main channel borders of the Kanawha River
… net included surface tows in Bill's Creek backwater, main channel border upstream and downstream of Little Guano backwater, and Little Guano Creek backwater, where deep tows (1.5 m deep) were also taken. The 3 shallow water habitats, less than 1 m in depth, sampled by the dropbox included …
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Fish-Habitat Associations in Small Backwaters of the Upper Missouri River, North Dakota
… and fish assemblages associated with small backwaters of the Upper Missouri River, North Dakota. Backwaters sampled ranged in size from 0.002 to 0.44 ha with a mean area of 0.08 ha and were located relatively close to the main channel of the Missouri River (mean = 48 m from river's edge). …
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Shallow Water Wave Propagation in Open Channel Flow
… phenomenon are studied: the role of downstream backwater in wave propagation processes; the difference between the noninertia wave and diffusion wave; and the applicability of different wave approximations to unsteady flow problems. Three mathematical approaches are employed. In the linear wave …
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Impact of water wheel hydrokinetic unit spacing on hydraulic conditions in a rectangular canal under mild slope subcritical flow with physical modeling
… a single unit installed. It was found that the backwater, or the rise in depth of the water upstream caused by the HK units, extended beyond the length of the model in every test. Furthermore, the backwater recovers more quickly in steeper channels tested, but did still not fully dissipate in …
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The impact of run-of-river dams on channel morphology and sedimentation
… conducted to evaluate the effects of the dams on backwater conditions and on particle mobility upstream and downstream of the dams. The results of this research show that the morphological and sedimentological effects caused by run-of-river dams are relatively minor compared to systematic patterns …
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A virtual flow meter to develop velocity-index ratings and evaluate the effect of flow disturbances on these ratings
… flow reversals, changes in stream bed roughness, backwater, and tidal effects, a stage-discharge rating is not unique and a velocity-index rating is often developed. A velocity-index rating relates the mean velocity of the channel and an index-velocity calculated by averaging velocities measured …
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Effects of Hydrological Connectivity on the Benthos of a Large River (Lower Mississippi River, USA)
… channels and oxbows, as well as rarely connected backwater lakes and pools. Herein, the effects of connectivity on riverine and floodplain biota, as well as the impacts of connectivity on the physiochemical makeup of both the water and sediments in secondary channels are examined. Between June …
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Water Quality Aspects of an Intermittent Stream and Backwaters in an Urban North Texas Watershed
… into Copas Cove of Lake Lewisville, creating backwater conditions. Pecan Creek water quality and chemistry were monitored from August 1997 to October 2001. Water quality was influenced by seasonal, spatial, climatic, and diurnal dynamics. Wastewater effluent discharged from the Pecan Creek …
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The development of Brunei during the British residential era, 1906-1959 : a sultanate regenerated
… be shown hoer a moribund, bankrupt and isolated backwater, troubled by internal disaffection and living under a Brooke 'sword of Damocles', was regenerated by more enlightened British administration, coupled later with the fortuitous discovery of petroleum, into a peaceful, flourishing and …
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Vessel induced physical effects related to navigation changes on the Kanawha River, West Virginia
… wind waves; diverging waves; squat and backwater generated by the tows; and propeller jet velocities and its associated entrainment velocities. Based on the calculated velocities, concentrations of suspended sediment induced by the disturbance are estimated, at the time of disturbance …
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Late Roman and Early Byzantine Floor Mosaics in Cilicia
… which are productions of a region considered a backwater of both Constantinople and Antioch. However, the collected mosaics at present corpus contain a wide range of artistic productions presenting representations in high aesthetic quality, as well as crudely rendered primitive examples. The …
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Population and habitat ecology of the river cooter (Pseudemys concinna) in the New River Gorge National River, W.V.
… Two radio-marked cooters wintered in shallow backwater channels. Potential factors limiting the population are collecting and high artificial summer flows which scour weed beds. Addition of basking sites may increase habitat suitability for cooters.
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NEW INSIGHTS INTO THE PALEOVEGETATION OF THE ANCIENT UNDERWATER FOREST LOCATED IN THE NORTHERN GULF OF MEXICO
… were evident, resembling a cypress backwater forest that later transitioned to grass dominant environment with high percentages of Poaceae. Cores 16DF-3A and 15DF-6 contain the no-modern analog cypress-alder communities previously described in 15DF-1. Since the pollen assemblages …
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