Daniel Altdorff

Daniel Altdorff
Universität Potsdam · Institute of Environmental Science and Geography

PhD
Large Scale Soil Moisture Mapping and Monitoring using mobile Cosmic-Ray Neutron Sensing (CRNS)

About

37
Publications
14,563
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
328
Citations

Publications

Publications (37)
Article
Full-text available
Agriculture in the boreal and Arctic regions is perceived as marginal, low intensity and inadequate to satisfy the needs of local communities, but another perspective is that northern agriculture has untapped potential to increase the local supply of food and even contribute to the global food system. Policies across northern jurisdictions target t...
Article
Link: https://rdcu.be/chuRF Under food security concerns and accelerated global warming, northern regions are becoming new agricultural frontiers. While diverse regional, national, and local policies support northern agricultural intensification and expansion through land use conversion, the scope and environmental consequences of northern agricul...
Article
Full-text available
Apparent magnetic susceptibility (MSa) as recorded by electromagnetic induction (EMI) instruments could offer relevant information about non-soil subsurface features. It is less affected by natural soil properties than its prominent counterpart,i.e., apparent electrical conductivity (ECa). Hence, MSaisgenerally a promising approach to investigate a...
Article
Full-text available
Electromagnetic induction (EMI) technique is an established method to measure the apparent electrical conductivity (EC a) of soil as a proxy for its physicochemical properties. Multi-frequency (MF) and multi-coil (MC) are the two types of commercially available EMI sensors. Although the working principles are similar, their theoretical and effectiv...
Article
Land-use conversion of pristine boreal peatlands for agricultural purposes is an ongoing process and projected to become more intensive with rising population growth and increased demands for food production. However, agricultural use of peatlands affects the production and emission of nitrous oxide (N2O), a very potent greenhouse gas currently gai...
Article
Full-text available
Multi-coil electromagnetic induction (EMI) systems induce magnetic fields below and above the subsurface. The resulting magnetic field is measured at multiple coils increasingly separated from the transmitter in a rigid boom. This field relates to the subsurface apparent electrical conductivity (σa), and σa represents an average value for the depth...
Article
Tree roots can cause damage to surface and subsurface infrastructure. Hence, timely detection of root system architecture (RSA) is needed to reduce conflict between trees and man-made facilities. Because excavation is expensive and often restricted, noninvasive detection of RSA by ground penetrating radar (GPR) is a promising technique. Although se...
Article
Full-text available
Boreal agriculture struggles with soils of lower agronomic value, most of which are sandy with a low water holding capacity (WHC) and prone to nutrient leaching. Biochar amendments are associated with positive effects on soil hydraulic properties and enhanced nutrient retention. However, these effects are strongly related to feedstock type and pyro...
Article
Tree roots can cause damage to surface and subsurface infrastructure. Hence, timely detection of root system architecture (RSA) is needed to reduce conflict between trees and man-made facilities. Because excavation is expensive and often restricted, noninvasive detection of RSA by ground penetrating radar (GPR) is a promising technique. Although se...
Article
Full-text available
As agricultural regions are threatened by climate change, warming of high latitude regions and increasing food demands may lead to northward expansion of global agriculture. While socio-economic demands and edaphic conditions may govern the expansion, climate is a key limiting factor. Extant literature on future crop projections considers establish...
Article
Full-text available
Electromagnetic induction (EMI) is an established method for mapping field-scale soil water content (SWC). However, the correlation between the recorded apparent electrical conductivity (ECa) and SWC is affected by several factors that can vary across test sites and with environmental conditions. As agricultural practices affect both, ECa and SWC,...
Research
Full-text available
Klimatische und anthropogene Änderungen beeinflussen die Wasserdynamik und damit verbunden die Wasserressourcen in Europa. Um diese Änderungen und deren Größenordnung verstehen und bewerten zu können, sowie gezielte Maßnahmen einzuleiten, bedarf es einem genauen Systemverständnis. Exemplarisch wird am Beispiel des Schweizer Mittelgebirgsflusses Enz...
Article
Conversion of boreal forest into agricultural land is likely to occur due to the shift of climatic zones and increasing food demand. However, any land conversion will affect the water balance and hence solute fluxes within the soil column and connected ecosystems. Understanding the consequences of land conversion on soil hydrology is essential to s...
Poster
Precision agriculture involves the management of agricultural fields including spatial information of soil properties derived from soil apparent electrical conductivity (ECa) measurements. However, spatio-temporal variability of soil water content (SWC), one of the main factors affecting ECa, needs to be specifically considered; managed podzols are...
Article
Full-text available
Mapping of soil water content (SWC) by electromagnetic induction (EMI) is an established method to obtain field-scale SWC information. However, the relationship between SWC and the apparent electrical conductivity (ECa) measured with EMI is complex and affected by several confounding factors at the catchment scale such as variable porosity (ϕ) and...
Technical Report
Full-text available
Re-utilisation of organic waste is globally widely employed to maximise both economic and environmental sustainability of human activities. Re-utilisation of organic waste nutrients of biochars produced from such wastes do offer a critical element for enhancing soil fertility and thus supporting sustainable agriculture. Newfoundland and Labrador pr...
Article
Peatlands store large amounts of soil organic carbon (SOC). Depending on their present condition, they act as a source or sink of carbon dioxide. Therefore, peatlands are highly relevant for climate change investigations and there is considerable interest to assess spatial heterogeneity of peat soil properties in order to assess the total amount of...
Article
Landslide activity is largely controlled by changes in soil properties, particularly soil moisture and the corresponding changes in pore pressure within the vadose zone. While knowledge of changes in soil conditions is of utmost importance for the prediction of landslides, it is difficult to obtain reliable information on the field scale. A possibi...
Data
Full-text available
Airborne geophysical measurements are widely established tools to characterize soil properties and its spatial changes (Lambot et al. 2006). However, with classical airborne surveys it is difficult to map small-scale features, because resolution decreases with flight height. The use of unmanned aerial vehicles (UAV) in near-surface geophysical sens...
Article
We strive to assess soil water content on a well-studied slow-moving hillslope in Austria. In doing so, we employ time lapse mapping of bulk electrical conductivity using a geophysical electromagnetic induction system operated at low induction numbers. This information is complemented by the acquisition of soil samples for gravimetric water content...
Article
River management and restoration measures are of increasing importance for integrated water resources management (IWRM) as well as for ecosystem services. However, often river management mainly considers engineering and construction aspects only and the hydrogeological settings as the properties and functions of ancient fluvial systems are neglecte...
Article
Intact peatlands are natural sinks of climate-relevant atmospheric CO2 and they are able to store high amounts of organic carbon (C). In addition, intact peatlands are increasingly important given positive effects on biodiversity, hydrological processes and corresponding management issues. Nevertheless, large parts of peatlands in populated areas w...
Article
Previous studies showed that in-situ visible near-infrared (vis-NIR) spectroscopy can overcome the limitations of conventional soil sampling. Costs can be reduced and spatial resolution enhanced when mapping field-scale variability of soil organic carbon (SOC). Detailed maps can help to improve SOC management and lead to better estimates of field-s...
Article
Full-text available
Hill-slopes of several hectares in size represent a difficult scale for subsurface characterisation, as these landscape units are well beyond the scope of traditional point-scale techniques. By means of electromagnetic induction (EMI) and gamma-ray spectroscopy, spatially distributed soil proxy data were collected from a heterogeneous hill-slope si...
Data
Today rapid survey methods of proximal soil sensing (PSS) provide an increasing number of different and highly resolved data. These multidimensional data sets can lead to multilayered and complex maps of parameters which are only indirectly related to soil properties and soil functions. However, in applications usually just one clear elementary map...
Article
Full-text available
Hill-slopes of several hectares in size represent a difficult scale for subsurface characterization, as these landscape units are well beyond the scope of traditional point-scale techniques. By means of electromagnetic induction (EMI) and gamma-ray spectroscopy, spatially distributed soil proxy data were collected from a heterogeneous hill-slope si...
Article
Full-text available
River restoration and applied restoration measures are of increasing importance for integrated water resources management (IWRM) as well as for ecosystem services including water storage and purification, habitat provision and climate regulation. However, often river restoration is planned and realized by engineering and constructing aspects only a...
Article
Hydrogeological issues play a major role for slope stability in the context of natural hazards. Therefore, the investigation of subsurface structures related to soil-moisture pattern as well as monitoring of soilmoisture dynamics is essential for the assessment of landslide risks. In this study, we present first results of ongoing soil-moisture mon...
Conference Paper
Full-text available
It is an always growing insight in the research and science community that interdisciplinarity and a perspective related to the landscape scale is necessary if cross-cutting issues like watershed-management or different agricultural management practices will be examined. To meet the challenges which result from questions related to soil and water a...
Article
Full-text available
For land management options, a sharp partitioning of areas is suitable. However, applied soil science usually provides integrated data and different information from identical sites and does not supply a partitioning in respect to all variables. In this paper, we describe a way for deriving reasonable partitioning of sites from multidimensional dat...

Network

Cited By

Projects

Projects (3)
Project
The current food production regions risk substantial reduction of agricultural productivity by 2100 due to accelerated climate change. However, the boreal region is also expected to undergo significant climatic changes. This might allow for a significant geographical shift of crops and cropping systems by and after 2100. These divergent scenarios linked to climate change do arguably set up the stage for a northward expansion of larger scale agricultural systems. Such a scenario would be expected to affect current farming practices and related social structures while opening the region to new opportunities and create new challenges. This raises critical social questions, superimposed on a need for strong natural sciences to support a coherent advisory system for a sustainable agricultural expansion in the boreal region. Nevertheless, the research to support the management of this northward expansion is yet to be developed to the point where it can meaningfully contribute to agricultural management in the boreal region with its distinct edaphic, hydrologic and solar radiation dynamics. Most of this expansion occurs, by necessity, on lands converted from their natural states creating a dynamic system that requires tailored management alternatives and political decisions that are hardly supported by the current body of knowledge. It may be easily argued that given the complexities of any such shift requires knowledge support systems that integrates researchers across a wide spectrum of natural, social and political sciences, not only from traditional agricultural institutions. If this is true then we must establish a knowledge exchange platform that allows communities, farmers, scientists and policy makers to examine and timely respond to challenges unique to boreal agriculture.
Project
To study the impacts of climate change from the agricultural perspective, highlighting areal changes in crop suitability due to temperature change, precipitation change, and the growing socio-economic demand for food.