Koksijde Ten Bogaerde. Rapportage van het archeologische onderzoek voor de opmaak van het landschapsbeheerplan Ten Bogaerde

Het rapport behelst een archeologische studie die kadert binnen een ruimere opdracht , namelijk de opmaak van een landschapsbeheersplan voor het landschap Ten Bogaerde in opdracht van de gemeente Koksijde. Het archeologisch onderzoek bestaande uit een inventariserend bureauonderzoek, een geofysisch onderzoek en archeologisch veldwerk ter controle van de beide voorgaande fases, moet toelaten om een waardering op te maken omtrent het aanwezige archeologisch bodemarchief en hoe men hiermee dient om te gaan bij de geplande herinrichting van het gebied

Increasing positional accuracy of surveys: correcting for spatial offset and time lag

C

Good practice in high-resolution EMI data processing for archaeological prospection

N

Improving the reliability of soil EC-mapping : robust apparent electrical conductivity (rECa) estimation in ground-based frequency domain electromagnetics

The use of frequency domain electromagnetic (FDEM) instrumentation in ground-based near-surface applications is continually expanding. In soil studies, FDEM is mainly deployed to inform on soil properties such as salinity, texture, moisture or compaction by evaluating the low induction number (LIN) apparent electrical conductivity (ECa). However, advanced FDEM applications face terrains and conditions in which these LIN approximations are no longer valid. Under such conditions, the aforementioned instrumentation output systematically underestimates ECa values; making semi-qualitative data analysis, representation and practical interpretation impossible. For this reason, methods have to be developed to relate the complex FDEM responses to a reliable ECa, beyond the limitations of the LIN approximation. In this work, we present a quadrature-phase algorithm (i.e. excluding the in-phase signal from the estimation) to obtain a robust apparent electrical conductivity at both low and high induction numbers. In addition, the algorithm classifies the ECa estimations as either robust or non-robust based on instrument noise, desired precision of the ECa estimation and the effect of subsurface magnetic variations. The algorithm accounts for electrical conductivity, instrument elevation, coil geometry, operating frequency, subsurface magnetic variation and random errors. The presented procedure, which was tested on synthetic and experimental data, consists a robust and straightforward approach to increase reliability of ECa derived soil mapping

Making a mountain out of a molehill? : a low-cost and time-efficient molehill survey of the lost medieval harbor site of Monnikerede, Belgium

Grasslands pose a particular problem for archaeological survey involving artifact assessment, as no material is plowed up to the surface. Although finds in molehills are often the only source of information available on sites with such low visibility, an archaeology of molehills has thus far been largely disregarded. Yet, by applying a low-cost and time-efficient methodology, both the potential and the pitfalls of molehill archaeology come to the forefront. At the medieval harbor site of Monnikerede, it was possible to assess material culture and to locate certain structural elements. However, when artifact densities were compared with the underlying geophysical anomalies, a more complex relationship appeared at the level of individual features