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Julia Tanzer
Proman Management GmbH, Weingartenstrasse 92, 2214 Auersthal, Austria

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Journal article
Published: 31 March 2021 in Sustainability
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The Baltic Sea is considered the marine water body most severely affected by eutrophication within Europe. Due to its limited water exchange nutrients have a particularly long residence time in the sea. While several studies have analysed the costs of reducing current nutrient emissions, the costs for remediating legacy nutrient loads of past emissions remain unknown. Although the Baltic Sea is a comparatively well-monitored region, current data and knowledge is insufficient to provide a sound quantification of legacy nutrient loads and much less their abatement costs. A first rough estimation of agricultural legacy nutrient loads yields an accumulation of 0.5–4.0 Mt N and 0.3–1.2 Mt P in the Baltic Sea and 0.4–0.5 Mt P in agricultural soils within the catchment. The costs for removing or immobilising this amount of nutrients via deep water oxygenation, mussel farming and soil gypsum amendment are in the range of few tens to over 100 billion €. These preliminary results are meant as a basis for future studies and show that while requiring serious commitment to funding and implementation, remediating agricultural legacy loads is not infeasible and may even provide economic benefits to local communities in the long run.

ACS Style

Julia Tanzer; Ralf Hermann; Ludwig Hermann. Remediating Agricultural Legacy Nutrient Loads in the Baltic Sea Region. Sustainability 2021, 13, 3872 .

AMA Style

Julia Tanzer, Ralf Hermann, Ludwig Hermann. Remediating Agricultural Legacy Nutrient Loads in the Baltic Sea Region. Sustainability. 2021; 13 (7):3872.

Chicago/Turabian Style

Julia Tanzer; Ralf Hermann; Ludwig Hermann. 2021. "Remediating Agricultural Legacy Nutrient Loads in the Baltic Sea Region." Sustainability 13, no. 7: 3872.

Journal article
Published: 01 July 2020 in Resources, Conservation and Recycling
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The successful implementation of sustainable resource management strategies depends on the availability of indicators that are capable of reflecting system complexity adequately but can easily be computed and communicated. However, systematic assessment of the scope and limits of simple indicators is often lacking. In the present study two indicators that can readily be derived from a material flow analysis structure are applied to and evaluated in a large and complex system of phosphorus and nitrogen management in Austria. Circularity (C) is defined as the share of recycled materials in total system throughput, whereas the Substance Concentration Efficiency (SCE), an indicator based on statistical entropy, measures the extent to which a substance is concentrated or diluted while passing through the system. For comparison the indicators were normalized with respect to a best-case and worst-case scenario (C¯ and SCE¯). Although both indicators correspond well in their general statements, clear differences in the prioritization of different aspects of sustainability can be observed. While C¯ focuses on increasing recycling, emission reduction and system downsizing have stronger effects on SCE¯. SCE¯ therefore is considered more suitable for providing first indications on sustainability in Austrian nutrient management.

ACS Style

Julia Tanzer; Helmut Rechberger. Complex system, simple indicators: Evaluation of circularity and statistical entropy as indicators of sustainability in Austrian nutrient management. Resources, Conservation and Recycling 2020, 162, 104961 .

AMA Style

Julia Tanzer, Helmut Rechberger. Complex system, simple indicators: Evaluation of circularity and statistical entropy as indicators of sustainability in Austrian nutrient management. Resources, Conservation and Recycling. 2020; 162 ():104961.

Chicago/Turabian Style

Julia Tanzer; Helmut Rechberger. 2020. "Complex system, simple indicators: Evaluation of circularity and statistical entropy as indicators of sustainability in Austrian nutrient management." Resources, Conservation and Recycling 162, no. : 104961.

Journal article
Published: 27 September 2019 in Sustainability
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Agriculture is one of the largest consumers of water and energy. This paper evaluated the agricultural sustainability of the Chenmengquan irrigation district of China based on the water–energy–food nexus. One objective weighting method and one subjective weighting method were integrated, based on game theory, and a matter–element model was constructed to evaluate agricultural sustainability for the research region. The sensitivity of each index to the evaluation class was also analyzed. The results showed that agricultural sustainability was moderate in 2006–2012 and high in 2012–2015. The indexes, which represent water-use efficiency and yield per unit area of crops, had higher sensitivities in the context of the present case study. The results also indicated that agricultural sustainability had a comparatively positive trend between 2012 and 2015, and that pesticide utilization was the most important issue for agricultural sustainability. The approach of using the combination of a weighting method, based upon game theory, and the use of the matter–element model provides a guide for the evaluation of agricultural sustainability.

ACS Style

Chang Liu; Zhanyu Zhang; Shuya Liu; Qiaoyuan Liu; Baoping Feng; Julia Tanzer. Evaluating Agricultural Sustainability Based on the Water–Energy–Food Nexus in the Chenmengquan Irrigation District of China. Sustainability 2019, 11, 5350 .

AMA Style

Chang Liu, Zhanyu Zhang, Shuya Liu, Qiaoyuan Liu, Baoping Feng, Julia Tanzer. Evaluating Agricultural Sustainability Based on the Water–Energy–Food Nexus in the Chenmengquan Irrigation District of China. Sustainability. 2019; 11 (19):5350.

Chicago/Turabian Style

Chang Liu; Zhanyu Zhang; Shuya Liu; Qiaoyuan Liu; Baoping Feng; Julia Tanzer. 2019. "Evaluating Agricultural Sustainability Based on the Water–Energy–Food Nexus in the Chenmengquan Irrigation District of China." Sustainability 11, no. 19: 5350.

Journal article
Published: 04 June 2019 in Recycling
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Circular economy is currently characterized by various definitions, measurement approaches, and critical analyses thereof coexisting alongside each other. Whether the concept eventually prevails or collapses will depend to some extent on our success in harmonizing assessment methods among public, scientific, and private institutions, as well as across different materials and scales. Therefore, in this article, we present a generic material flow analysis framework that might serve as a common basis for circularity assessment, and test it by means of three case studies. It proved impossible to eliminate all subjective assumptions when transforming a real complex system into the generic framework, especially regarding the definition of by-products. However, by introducing subsystems it is at least possible to make such assumptions transparent. Therefore, adequate comparability across regions, materials, and scales is provided. Moreover, the generic system allows for coupled analysis of multiple materials simultaneously so that interactions between them can be studied, as well and a deeper insight into overall sustainability of the system can be gained.

ACS Style

Julia Tanzer; Helmut Rechberger. Setting the Common Ground: A Generic Framework for Material Flow Analysis of Complex Systems. Recycling 2019, 4, 23 .

AMA Style

Julia Tanzer, Helmut Rechberger. Setting the Common Ground: A Generic Framework for Material Flow Analysis of Complex Systems. Recycling. 2019; 4 (2):23.

Chicago/Turabian Style

Julia Tanzer; Helmut Rechberger. 2019. "Setting the Common Ground: A Generic Framework for Material Flow Analysis of Complex Systems." Recycling 4, no. 2: 23.

Journal article
Published: 01 November 2018 in Science of The Total Environment
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The tremendous increase in resource consumption over the past century and the environmental challenges it entails has spurred discussions for a shift from a linear to a circular resource use. However, to date most resource studies are restricted to one material or a single sector or process. In this work, a coupled material flow analysis taking the national phosphorus (P) and nitrogen (N) system of Austria as an example for two closely connected resource systems is conducted. Effects of different measures aimed at reducing P and/or N-demand, increasing recycling or reducing emissions to air and water are compared to a reference state (representing the actual situation in 2015). Changes in the mineral fertilizer demand of the system, P and N losses in the waste sector, water emissions of P and N, P soil accumulation and atmospheric N emissions are analyzed. Overall positive feedbacks between measures and between different goals of one measure always outweigh negative ones, which is why the highest efficiency gains (57±4%) can be achieved by a combination of all the 16 measures studied. Potentials for the reduction of mineral fertilizer demand are larger than for emission reduction though, confirming the past priority of environmental protection over resource protection. Although coupling significantly raises model complexity it can be shown that material flows of more than one substance can be simultaneously analyzed in a rather complex system. This may reveal interrelations, co-benefits and trade-offs between different resources that might have been omitted in a mono-substance analysis and thus improve judgment of sustainability and viability of different management strategies.

ACS Style

Julia Tanzer; Ottavia Zoboli; Matthias Zessner; Helmut Rechberger. Filling two needs with one deed: Potentials to simultaneously improve phosphorus and nitrogen management in Austria as an example for coupled resource management systems. Science of The Total Environment 2018, 640-641, 894 -907.

AMA Style

Julia Tanzer, Ottavia Zoboli, Matthias Zessner, Helmut Rechberger. Filling two needs with one deed: Potentials to simultaneously improve phosphorus and nitrogen management in Austria as an example for coupled resource management systems. Science of The Total Environment. 2018; 640-641 ():894-907.

Chicago/Turabian Style

Julia Tanzer; Ottavia Zoboli; Matthias Zessner; Helmut Rechberger. 2018. "Filling two needs with one deed: Potentials to simultaneously improve phosphorus and nitrogen management in Austria as an example for coupled resource management systems." Science of The Total Environment 640-641, no. : 894-907.