During the Roman and early-medieval period in the Netherlands, an extensive network of routes connected settlements on the local, regional and supraregional scale. The orientation of these route networks in part was determined by settlement locations, and in part by environmental factors (e.g. soil type, relief). Therefore these route networks provide a key in understanding the dynamic interplay between cultural and environmental factors.This study focuses on modelling Roman and early-medieval routes using a multi-proxy approach. By combining network friction with archaeological data representing settlements, burial sites and shipping-related finds we wish to investigate the possibilities of using these large-scale datasets for modelling Roman and earlymedieval route networks in the Netherlands. Data representing past infrastructure and isolated archaeological finds were used to validate the model output.Results show that in geomorphologically diverse lowland regions, such as the Netherlands, network friction is extremely useful for modelling historical route networks. We found a clear relationship between environmental conditions, settlement locations and the spatial distribution of infrastructure. Using evidence-based modelling, we were able to correctly predict the location of 89% of the currently identified Roman infrastructure, and 85% of the known early-medieval infrastructure in the Netherlands within a 1000 m buffer. Additionally, despite only roughly covering a surface area of 13% in the Roman and 11% in the early-medieval period of the Netherlands, 82% and 72% of all known isolated finds were located within the same buffer.
This study focuses on reconstructing landscape prerequisites for Roman and early‐medieval routes in the Netherlands. We applied spatial modeling to modern and paleogeographical landscape data in order to determine geographical obstacles for possible translocation in ca. A.D. 100 and 800 via land and water. Network‐friction values were calculated to produce a spatial model of possible movement corridors and to enable the integration of archaeological data. Results show that in geographically dynamic lowland regions such as the current Netherlands, landscape units such as water, peat, and levees must have had a high impact on route orientation. The lower parts of the western Netherlands were almost inaccessible by land, implying that its inhabitants largely must have depended on rivers and streams for transportation. In Dutch coastal and river areas, the landscape changed drastically between A.D. 100 and 800, the largest changes occurring along the coast.
Holocene drift-sand activity in the northwest European sand belt is commonly
directly linked to population pressure (agricultural activity) or to climate
change (e.g. storminess). In the Pleistocene sand areas of the Netherlands,
small-scale Holocene drift-sand activity began in the Mesolithic, whereas
large-scale sand drifting started during the Middle Ages. This last phase not
only coincides with the intensification of farming and demographic pressure but
also is commonly associated with a colder climate and enhanced storminess. This
raises the question to what extent drift-sand activity can be attributed to
either human activities or natural forcing factors. In this study, we compare
the spatial and temporal patterns of drift-sand occurrence for the four
characteristic Pleistocene sand regions in the Netherlands for the period
between 1000 BC and AD 1700. To this end, we compiled a new supra-regional
overview of drift-sand activity based on age estimates (14C,
optically stimulated luminescence (OSL), archaeological and historical ages).
The occurrence of sand drifting was then compared in time and space with
historical-route networks, relative vegetation openness and climate. Results
indicate a constant but low drift-sand activity between 1000 BC and AD 1000,
interrupted by a remarkable decrease in activity around the BC/AD transition. It
is evident that human pressure on the landscape was most influential on
initiating sand drifting: this is supported by more frequent occurrences close
to routes and the uninterrupted increase of drift-sand activity from AD 900
onwards, a period of high population density and large-scale deforestation. Once
triggered by human activities, this drift-sand development was probably further
intensified several centuries later during the cold and stormier ‘Little Ice
Age’ (LIA; AD 1570–1850).
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