WFS des rechtskräftigen Regionalen Raumordnungsprogramms des Landkreises Rotenburg (Wümme) in zeichnerischer Darstellung. Das Regionale Raumordnungsprogramm ist aus dem Landesraumordnungsprogramm (LROP) 2017 entwickelt und legt die angestrebte räumliche und strukturelle Entwicklung des Planungsraumes fest.
Farm structures are often characterized by regional heterogeneity, agglomeration effects, sub-optimal farm sizes and income disparities. The main objective of this study is to analyze whether this is a result of path dependent structural change, what the determinants of path dependence are, and how it may be overcome. The focus is on the German dairy sector which has been highly regulated and subsidized in the past and faces severe structural deficits. The future of this sector in the process of an ongoing liberalization will be analyzed by applying theoretical concepts of path dependence and path breaking. In these regards, key issues are the actual situation, technological and market trends as well as agricultural policies. The methodology will be based on a participative use of the agent-based model AgriPoliS and participatory laboratory experiments. On the one hand, AgriPoliS will be tested as a tool for stakeholder oriented analysis of mechanisms, trends and policy effects. This part aims to analyze whether and how path dependence of structural change can be overcome on a sector level. In a second part, AgriPoliS will be extended such that human players (farmers, students) can take over the role of agents in the model. This part aims to compare human agents with computer agents in order to overcome single farm path dependence.
Soil structure determines a large part of the spatial heterogeneity in water storage and fluxes from the plot to the hillslope scale. In recent decades important progress in hydrological research has been achieved by including soil structure in hydrological models. One of the main problems herein remains the difficulty of measuring soil structure and quantifying its influence on hydrological processes. As soil structure is very often of biogenic origin (macropores), the main objective of this project is to use the influence of bioactivity and resulting soil structures to describe and support modelling of hydrological processes at different scales. Therefore, local scale bioactivity will be linked to local infiltration patterns under varying catchment conditions. At hillslope scale, the spatial distribution of bioactivity patterns will be linked to connectivity of subsurface structures to explain subsurface stormflow generation. Then we will apply species distribution modelling of key organisms in order to extrapolate the gained knowledge to the catchment scale. As on one hand, bioactivity influences the hydrological processes, but on the other hand the species distribution also depends on soil moisture contents, including the feedbacks between bioactivity and soil hydrology is pivotal for getting reliable predictions of catchment scale hydrological behavior under land use change and climate change.
In subsoils, organic matter (SOM) concentrations and microbial densities are much lower than in topsoils and most likely highly heterogeneously distributed. We therefore hypothesize, that the spatial separation between consumers (microorganisms) and their substrates (SOM) is an important limiting factor for carbon turnover in subsoils. Further, we expect microbial activity to occur mainly in few hot spots, such as the rhizosphere or flow paths where fresh substrate inputs are rapidly mineralized. In a first step, the spatial distribution of enzyme and microbial activities in top- and subsoils will be determined in order to identify hot spots and relate this to apparent 14C age, SOM composition, microbial community composition and soil properties, as determined by the other projects within the research unit. In a further step it will be determined, if microbial activity and SOM turnover is limited by substrate availability in spatially distinct soil microsites. By relating this data to root distribution and preferential flow paths we will contribute to the understanding of stabilizing and destabilizing processes of subsoil organic matter. As it is unclear, at which spatial scale these differentiating processes are effective, the analysis of spatial variability will cover the dm to the mm scale. As spatial segregation between consumers and substrates will depend on the pore and aggregate architecture of the soil, the role of the physical integrity of these structures on SOM turnover will also be investigated in laboratory experiments.
The WMS InSpEE (INSPIRE) provides information about the areal distribution of salt structures (salt domes and salt pillows) in Northern Germany. Contours of the salt structures can be displayed at horizontal cross-sections at four different depths up to a maximum depth of 2000 m below NN. The geodata have resulted from a BMWi-funded research project “InSpEE” running from the year 2012 to 2015. The acronym stands for "Information system salt structures: planning basis, selection criteria and estimation of the potential for the construction of salt caverns for the storage of renewable energies (hydrogen and compressed air)”. Taking into account the fact that this work was undertaken at a scale for providing an overview and not for investigation of single structures, the scale of display is limited to a minimum of 1:300.000. Additionally four horizontal cross-section maps display the stratigraphical situation at a given depth. In concurrence of maps at different depths areal bedding conditions can be determined, e.g. to generally assess and interpret the spread of different stratigraphic units. Clearly visible are extent and shape of the salt structures within their regional context at the different depths, with extent and boundary of the salt structures having been the main focus of the project. Four horizontal cross-section maps covering the whole onshore area of Northern Germany have been developed at a scale of 1:500.000. The maps cover the depths of -500, -1000, -1500, -2000 m below NN. The four depths are based on typical depth requirements of existing salt caverns in Northern Germany, mainly related to hydrocarbon storage. The shapes of the structures show rudimentary information of their geometry and their change with depths. In addition they form the starting point for rock mechanical calculations necessary for the planning and construction of salt caverns for storage as well as for assessing storage potentials. The maps can be used as a pre-selection tool for subsurface uses. It can also be used to assess coverage and extension of salt structures. Offshore areas were not treated within the project. All horizontal cross-section maps were adjusted with the respective state geological survey organisations. According to the Data Specification on Geology (D2.8.II.4_v3.0) the WMS InSpEE (INSPIRE) provides INSPIRE-compliant data. The WMS InSpEE (INSPIRE) contains two group layers: The first group layer “INSPIRE: Salt structures in Northern Germany“ comprises the layers GE.Geologic.Unit.Salt structure types, GE.GeologicUnit.Salt pillow remnants, GE.GeologicUnit.Structure-building salinar and GE.GeologicUnit.Structural outlines. The layer GE.GeologicUnit.Structural outlines contains according to the four depths four sublayers, e.g. GE.GeologiUnit.Structural outlines 500 m below NN. The second group layer „INSPIRE: Horizontal cross-section maps of Northern Germany“ comprises according to the four depths four layers, e.g. Horizontal cross-section map – 500 m below NN. This layer, in turns, contains two sublayers: GE.GeologicFault.Relevant fault traces and GE.GeologicUnit.Stratigraphic Units. Via the getFeatureInfo request the user obtains additional information on the different geometries. In case of the GE.Geologic.Unit.Salt structure types the user gets access to a data sheet with additional information and further reading in German for the respective salt structure via the getFeatureInfo request.
Within the framework of the GEOSTOR Project, the CO2 storage potential of the Jurassic succession in the German Central Graben was analysed. Twelve potential trap structures were initially mapped along the base of the Kimmeridge Clay Formation, which serves as the primary seal for potential reservoir sandstones within the Central Graben Subgroup. The Kimmeridge Clay Formation is generally continuously distributed across the German Central Graben, with only localized penetrations by rising salt diapirs. In contrast, the Central Graben Subgroup, serving as a potential reservoir unit, exhibits an uneven distribution across the area, limiting the presence and continuity of reservoir rocks within each trap structure. To further delineate the spatial extent of the mapped reservoir structures, the base of the Central Graben Subgroup was used as an additional reference layer. Due to the intermittent nature of Jurassic sandstones within the Central Graben Subgroup, a subsequent analysis classified each structure based on borehole data to confirm the presence of reservoir sands. Structures were categorized as ‘proven,’ ‘not present,’ or ‘uncertain’ depending on sandstone availability and continuity within the trap. All mapped reservoir structures are buried at depths ranging from 2225 to 3043 meters (apex depth) and are considered closed systems, situated within a complex structural network of salt diapirs, faults, and pinch-outs. Capacity calculations were conducted following the method outlined by Fuhrmann et al. (2024), and the horizons used for mapping are based on the work of Müller et al. (2023) and Thöle et al. (2021). Fuhrmann, A., Knopf, S., Thöle, H., Kästner, F., Ahlrichs, N., Stück, H.L., Schlieder-Kowitz, A., Kuhlmann, G., (2024). CO2 storage potential of the Middle Buntsandstein Subgroup-German sector of the North Sea. International Journal of Greenhouse Gas Control 136. Müller, S.M., Jähne-Klingberg, F., Thöle, H., Jakobsen, F.C., Bense, F., Winsemann, J. & Gaedicke, C. (2023). Jurassic to Lower Cretaceous tectonostratigraphy of the German Central Graben, southern North Sea. – Netherlands Journal of Geosciences, 102: e4. DOI:10.1017/njg.2023.4 Thöle, H., Jähne-Klingberg, F., Doornenbal, H., den Dulk, M., Britze, P. & Jakobsen F. (2021). Deliverable 3.8 – Harmonized depth models and structural framework of the NL-GER-DK North Sea. GEOERA 3DGEO-EU; 3D Geomodeling for Europe; project number GeoE.171.005. Report.
The project aims to theorize the scalar organization of natural resource governance in the European Union. This research agenda is inspired by critical geographers' work on the politics of scale. The research will examine an analytical framework derived from theories of institutional change and multi-level govern-ance to fill this theoretical gap. Furthermore, it will review conceptualizations of the state in institutional economics, evaluate their adequacy to capture the role of the state in the dynamics identified, and develop them further. The described processes may imply shifts in administrative levels, shifts in relations between different levels and changes in spatial delimitations of competent jurisdictions that result, for example, from decentralization or the introduction of river basin oriented administrative structures. The research investigates the implications of two European Directives: the Water Framework Directive (WFD) and the Marine Strategy Framework Directive (MSFD). They both have potentially great significance for the organization of marine and water governance at the level of Member States and below, and adhere to similar regulatory ideas for achieving good ecological status of waters. A multiple case study on changes in the scalar reorganization of marine and water governance that result from the implementation of the Directives will be carried out. It will rely on qualitative and quantitative data gathering based on semi-structured interviews and review of secondary and tertiary sources looking at Portugal, Spain, and Germany. It specifically addresses the role of social ecological transactions, the structure of decision making processes and the role of changes in contextual factors (such as ideologies, interdependent institutions and technology).
Volkswirtschaftliche Bewertung der nord-westlichen Umfahrung Hamburgs mit einer Elbquerung zwischen Stade und Glueckstadt, Ermittlung der Wirkungen auf die Raumstruktur, Wirkungen und Moeglichkeiten der privaten Finanzierung der Elbquerung, Aufbereitung der Gueterverkehrsprognose (Planco bearbeitet einen Teilbereich der Gesamtuntersuchung).
Das Forschungsvorhaben untersucht die Abhaengigkeit der Raumstrukturen (Produktions-, Wohnstandorte) und daraus resultierender Mobilitaet im Gueter- und Personenverkehr von den Kosten des Verkehrs. Grundlage sind statistische Analysen mit Hilfe regionalstatistischer sowie verkehrsstatistischer Daten.
Aktuelle Wettermodelle haben Schwierigkeiten die räumliche Niederschlagsverteilung von konvektiven Wolkensystemen korrekt zu modellieren, was die Vorhersage der Niederschlagsintensität und -dauer erschwert. Ziel dieses Projekts ist es zu untersuchen, wie Eispartikeleigenschaften die Entwicklung stratiformer Niederschlagsregionen innerhalb konvektiver Systeme beeinflussen. Hierzu schlagen wir die synergetische Nutzung zweier polarimetrischer Radarsysteme vor, des C-Band POLDIRAD des DLR in Oberpfaffenhofen und des Ka-Band MIRA-35 der LMU in München. Zum einen werden dazu Details der Eismikrophysik mittels einer neuen Methode beleuchtet. Zum anderen werden die Konvektionszellen mit Hilfe des operationellen DWD Radarnetzwerks verfolgt, um zeitliche Entwicklung und horizontalen Kontext zu erfassen. Für die konkreten Beobachtungstage werden wir die räumliche Entwicklung zwischen konvektiven und stratiformen Regionen mit hochaufgelösten Wettermodellläufen mit unterschiedlichen Mikrophysik-Schemata vergleichen. Ziel dieses Vergleichs ist es zu verstehen, warum die meisten Schemata die Radarreflektivität in konvektiven Regionen noch immer überschätzen und warum gleichzeitig zu wenig stratiformer Niederschlag produziert wird.In Phase 1 konnten wir die Machbarkeit koordinierter C- und Ka-Band Messungen an den beiden Standorten demonstrieren und einen Algorithmus zur Ableitung von Eispartikeleigenschaften entwickeln. Dabei konnten wir ein tieferes Verständnis der bestehenden Mehrdeutigkeiten gewinnen, welche durch die unbekannte Eispartikeldichte verursacht werden. Gleichzeitig wurden für die zahlreichen Beobachtungstage entsprechende Wettermodellläufe mit fünf unterschiedlichen Mikrophysik-Schemata durchgeführt, um die Variabilität klassischer Parameter (z.B. Anzahl, Höhe und räumliche Verteilung der Zellkerne) zwischen den Schemata zu analysieren. In Phase 2 wollen wir unsere Methoden aus Phase 1 weiterentwickeln, um noch unbekannte Größen wie die Eispartikeldichte und die räumliche Struktur des Gesamtsystems bestehend aus konvektivem Zellkern und stratiformen Teil zu erfassen. Dies ermöglicht es uns zu untersuchen wie mikrophysikalische Prozesse wie Bereifung und Aggregation Eispartikel modifizieren und damit deren Transport in den stratiformen Niederschlagsbereich beeinflussen. Um bestehende Mehrdeutigkeiten einzugrenzen, werden wir dazu Messungen der Fallgeschwindigkeit und der linearen Depolarisation mit einbeziehen. Diese Höhen-Zeit-Schnitte werden mit den Zell-Trajektorien in einem Datensatz von etwa 100 konvektiven Tagen zeitlich wie statistisch in Verbindung gebracht, um die beobachtete und modellierte Mikrophysik im konvektiv-stratiformen Übergang einzuordnen. Dazu wird die Verfolgung von Zellen in Messung und Modell auf die umgebende stratiforme Niederschlagsregion ausgeweitet. Die Kombination der horizontalen und vertikalen Perspektive ist dabei eine wesentliche Neuerung unseres Ansatzes im Vergleich zu bisherigen Studien.
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