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Holocene sediment budgets for upland catchments : the problem of soilscape model and data availability

Holocene sediment budgets for upland catchments : the problem of soilscape model and data availability
Sediment dynamics. Special issue
Action anthropique ; Allemagne ; Bassin-versant ; Bilan sédimentaire ; Erosion des sols ; Holocène ; Modèle ; Périglaciaire ; Rheinland-Pfalz ; Taux de sédimentation ; Utilisation du sol
Germany ; Holocene ; Human impact ; Land use ; Model ; Periglacial features ; Rhineland-Palatinate ; Sediment budget ; Sedimentation rate ; Soil erosion ; Watershed
This study presents a Holocene sediment budget for the upland catchment of the Speyerbach in the Palatinate Forest, southwestern Germany. The influences of both, data availability and the choice of an appropriate soilscape model on the sediment
budget calculations are investigated. For budget calculations the spatial distribution of soils was derived from the soil map 1:50,000. In order to model the sediment budget a reference soil thickness (a so-called soilscape model), which represents
thickness of the MSS is a crucial point. Therefore a statistical model using the local profile descriptions of the soil database for the Speyerbach catchment was set up. The error estimation for sediment budget based on the Speyerbach data is complicated
. Future work will address the estimation of human impact by the analysis of historical data and datings of colluvial layers as well as a field validation of the computed sediment budgets.

Establishing a Holocene sediment budget for the river Dijle

Establishing a Holocene sediment budget for the river Dijle
Sediment dynamics. Special issue
Agricultural land use ; Belgium ; Flemish Brabant ; Forest ; Holocene ; Human impact ; Sediment budget ; Sedimentology ; Soil erosion ; Suspended load ; Watershed
A Holocene sediment budget was constructed for the Dijle catchment in the Belgian loess belt, in order to understand long-term sediment dynamics. Hillslope sediment redistribution was calculated using soil profile information from 809 soil augerings
of sediment units show an important increase in alluvial deposition from medieval times onwards, indicating the important influence of agricultural activities that developed from that period. Sediment budgets for the various tributary catchments provide
an insight in the sources and sinks of sediment at different scales within the catchment.

Irrigation agriculture and the sedimentary record in the Palpa Valley, southern Peru

Sediment dynamics. Special issue
Action anthropique ; Agriculture ; Archéologie ; Datation C 14 ; Désert ; Holocène ; Irrigation ; Paléo-environnement ; Propriétés du sol ; Pérou ; Quaternaire ; Stratigraphie ; Sédimentologie ; Taux de sédimentation
Agriculture ; Archaeology ; C 14 dating ; Desert ; Holocene ; Human impact ; Irrigation ; Palaeo-environment ; Peru ; Quaternary ; Sedimentation rate ; Sedimentology ; Soil properties ; Stratigraphy
This paper reports the results of sedimentological-pedological investigations in the Palpa Valley in the coastal desert of southern Peru, the northern extension of the Chilean Atacama, where sediment-laden river water is used for irrigation
. An adapted facies classification is used to deduce a generalised stratigraphical sequence of the valley bottom sediments. Chronological constraints from radiocarbon dating and archaeological finds are used to reconstruct sedimentation rates for fossil
to recent irragric anthrosols. Actualistic case studies are used to quantify present-day irrigation sedimentation. The investigations result in a clarification of the sedimentological and geomorphic history of this valley and a quantification of irrigation
-related sedimentation. Irragric anthrosols date back more than 3500 years and provide direct evidence for the beginning of irrigation agriculture in this region.

Trends and controls of Holocene floodplain sedimentation in the Rhine catchment

Trends and controls of Holocene floodplain sedimentation in the Rhine catchment
Sediment dynamics. Special issue
Action anthropique ; Allemagne ; Bassin-versant ; Changement climatique ; Datation C 14 ; Delta ; Europe ; Fossé tectonique ; Holocène ; Méthodologie ; Plaine d'inondation ; Rhin ; Taux de sédimentation
C 14 dating ; Climatic change ; Delta ; Europe ; Floodplain ; Germany ; Graben ; Holocene ; Human impact ; Methodology ; Rhine ; Sedimentation rate ; Watershed
Holocene floodplain sedimentation in the Rhine catchment is controlled by human and climate impacts. To better understand the relatve importance and interdependencies of external and internal controls, temporally resolved floodplain sedimentation
various parts of the catchment. The applied methodology strongly differs with the available temporal resolution and the size of the corresponding catchment. All 3 methods show a strong increase in sedimentation rate for more recent periods that can

Human impact on sediment dynamics - quantification and timing

Human impact on sediment dynamics - quantification and timing
Sediment dynamics. Special issue
Climatic change ; Floodplain ; Holocene ; Human impact ; Methodology ; Quaternary ; Sediment budget ; Sediment transport ; Sedimentology ; Soil erosion ; Watershed
This special issue provides a selection of papers (7/24) that were presented at the European Geosciences Union (EGU) General Assembly in Vienna (April 2007) in session GM19 on Quantifying and modelling human and climate controlled sediment dynamics
. The scope of the papers cover issues of sediment production, storage and transport for a range of fluvial environments in the United Kingdom, Belgium, Peru, Germany and China. These papers provide a representative sample of the current-day research
on the human impact on sediment dynamics, the methodologies used and the spatial and temporal scales considered.

Fluvial development and the sediment regime of the lower Calder, Ribble catchment, northwest England

Fluvial development and the sediment regime of the lower Calder, Ribble catchment, northwest England
Sediment dynamics. Special issue
Action anthropique ; Bassin-versant ; Bilan sédimentaire ; Datation C 14 ; Déboisement ; England ; Fluviatile ; Holocène ; Lancashire ; Pollen ; Quaternaire ; Royaume-Uni ; Taux de sédimentation
C 14 dating ; Deforestation ; England ; Fluvial processes ; Holocene ; Human impact ; Lancashire ; Pollen ; Quaternary ; Sediment budget ; Sedimentation rate ; United Kingdom ; Watershed
In the lower reaches of the Calder (Lancashire) tributary of the Ribble catchment (northwest England), 5 river terraces set into the surrounding glacial terrain have been mapped and their underlying sediments radiocarbon dated. Evidence for late

Hydrological responses to precipitation variation and diverse human activities in a mountainous tributary of the lower Xijiang, China

Sediment dynamics. Special issue
conduction, and in-channel damming) in this study. Two non-parametric statistical methods, Mann-Kendall and Pettitt test, were employed to detect the long-term changes in the time series of water discharge and sediment load (1959-2002) at the annual, monthly
and seasonal scales. The impacts of precipitation variation and human activities on water discharge and sediment load were discerned and quantified using double mass curve and linear regression methods. The operation of reservoirs and hydropower stations
is considered to be responsible for the observed increasing trends of water discharge in the dry-season and decreasing trends of sediment load after 1986, and for the latter, reforestation program in the catchment is another contributing factor. The distinct
seasonal changing patterns of both water discharge and sediment load in this study highlight the importance of involving monthly or seasonal time series in the change detection in hydrological data.

Land use history and historical soil erosion at Albersdorf (northern Germany) - Ceased agricultural land use after the pre-historical period

Sediment dynamics. Special issue
the soil/soil-sediment-sequences provided evidence for an acceleration of soil formation processes probably as a consequence of excessive prehistoric woodland pasture on poor sandy soils. The results from Albersdorf are compared with data from other sites

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