Tracing sources of suspended sediment in river basins: A case study of the River Culm, Devon, UK

1995 ◽  
Vol 46 (1) ◽  
pp. 327 ◽  
Author(s):  
DE Walling ◽  
JC Woodward
Keyword(s):  
Suspended Sediment ◽  
Drainage Basin ◽  
River Basins ◽  
Relative Importance ◽  
Considerable Potential ◽  
Rock Types ◽  
Monitoring Strategies ◽  
Specific Source ◽  
Composite Fingerprint

Information on the source of the suspended sediment transported by a river is becoming an increasingly important requirement in sediment investigations. Such information is difficult to assemble by means of traditional monitoring strategies, but the 'fingerprinting' technique offers considerable potential. The use of composite 'fingerprints' in combination with a multivariate mixing model can provide a basis for determining the relative importance of both individual areas of a catchment and specific source types. The results of applying this approach to the 276-km² basin of the River Culm in Devon, UK are presented. A suite of nine fingerprint properties was employed as a composite fingerprint, and this permitted the relative contributions of seven source types to be established. These source types represented material derived from the surface af cultivated and pasture areas on each of the three main rock types and material eroded from channel banks. By collecting samples of suspended sediment at different times during individual floods, it was possible to document changes in the relative contributions of the various sources during each flood in response to runoff source and travel times. Although the multivariate fingerprint approach has a number of limitations, it also has considerable potential as a means of tracing sources of suspended sediment within a large drainage basin.

Another Way of Early Pottery Distribution in Eastern Europe? Case Study of the Pezmog 4 Site, European Far Northeast

Radiocarbon ◽  
2014 ◽  
Vol 56 (2) ◽  
pp. 733-741 ◽  
Author(s):  
Victor N Karmanov ◽  
Natalia E Zaretskaya ◽  
Alexander V Volokitin
Keyword(s):  
Eastern Europe ◽  
River Basin ◽  
Radiocarbon Dating ◽  
Early Stage ◽  
River Basins ◽  
Ural Region ◽  
Time Range ◽  
Forest Zone ◽  
Early Pottery

A case study of the Neolithic comb ceramic site Pezmog 4 of the Kama culture presents a situation when results of radiocarbon dating change long-existing concepts concerning the development of archaeological events. Until the early 2000s, the chronology of the Kama culture, distributed mainly in the Kama and Vychegda River basins, has been based on comparative-typological analysis. Estimates of the age of this culture changed from the 3rd millennium BC in the 1950s to the 1st half of the 4th millennium BC by the 1990s. Research concerning the Pezmog 4 site in the central Vychegda River basin in 1999–2002 has abruptly changed this chronological understanding. The data obtained put the age of the early stage of Kama culture within the time range 5750–5620 cal BC and allowed us to propose the existence of another way of early pottery distribution in the forest zone of eastern Europe at the beginning of the 6th millennium BC. This innovation probably penetrated from the trans-Ural region.

scholarly journals First report of pyrethroid bioaccumulation in wild river fish: A case study in Iberian river basins (Spain)

2015 ◽  
Vol 75 ◽  
pp. 110-116 ◽  
Author(s):  
Cayo Corcellas ◽  
Ethel Eljarrat ◽  
Damià Barceló
Keyword(s):  
River Basins ◽  
First Report ◽  
River Fish

Estimation of streams order according to strahler classification system using GIS. Case study: streams of the Republic of Moldova

2019 ◽  
Author(s):  
Ana Jeleapov ◽  
Keyword(s):  
Water Resources ◽  
Classification System ◽  
River Basins ◽  
Drainage Density ◽  
Drainage Network ◽  
Republic Of Moldova ◽  
Rivers And Streams ◽  
The Republic

The paper contains the results of classification of rivers and streams of the Republic of Moldova according to classic Strahler method. Mentioned method was applied to estimate the hierarchical rank of the stream segments situated in 50 pilot basins using modern GIS techniques and drainage network of the GIS for Water Resources of Moldova. It was estimated that the maximal order of segments is 7 specific for the Raut and Ialpug rivers. Overall, length of 1st order streams forms 50%, while that of 7th order streams - < 1%. Additionally, stream number and frequency as well as drainage density were calculated for pilot river basins.

scholarly journals Multiple controls on sediment grain properties of Peruvian coastal river basins

2017 ◽  
Author(s):  
Camille Litty ◽  
Fritz Schlunegger ◽  
Willem Viveen
Keyword(s):  
Grain Size ◽  
Drainage Basin ◽  
River Basins ◽  
Humid Climate ◽  
Sediment Properties ◽  
Peruvian Andes ◽  
Southern Group ◽  
Gravel Beds ◽  
The North ◽  
Grain Properties

Abstract. Twenty-one coastal rivers located on the western Peruvian margin were analyzed to determine the relationships between fluvial and environmental processes and sediment grain properties such as grain size, roundness and sphericity. Modern gravel beds were sampled along a north-south transect on the western side of the Peruvian Andes, and at each site the long a-axis and the intermediate b-axis of about 500 pebbles were measured. Morphometric properties such as river gradient, catchment size and discharge of each drainage basin were determined and compared against measured grain properties. Grain size data show a constant value of the D50 percentile all along the coast, but an increase in the D84 and D96 values and an increase in the ratio of the intermediate and the long axis from south to north. Our results then yield better-sorted and less spherical material in the south when compared to the north. No correlations were found between the grain size and the morphometric properties of the river basins when considering the data together. Grouping the results in a northern and southern group shows better-sorted sediments and lower D84 and D96 values for the southern group of basins. Within the two groups, correlations were found between the grain size distributions and morphometric basins properties. Our data indicates that fluvial transport is the dominant process controlling the erosion, transport and deposition of sediment in the southern basins while we propose a geomorphic control on the grain size properties in the northern basins. Sediment properties in the northern and southern basins could not be linked to differences in tectonic controls. On the other hand, the north-south trend in the grain size and in the b/a ratio seems controlled by a shift towards a more humid climate and towards a stronger El Nino impact in northern Peru. But, generally speaking, the resulting trends and differences in sediment properties seem controlled by differences in the complex geomorphic setting along the arc and forearc regions.

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