How can transport and land-use transitions in urban regions be understood and supported? This question is increasingly relevant for researchers and policy makers alike given the growing urgency of sustainability issues confronting cities and the limited improvements can be observed despite continued policy attention, for example Transit-oriented development policies. To tackle this question, this thesis draws on theories and concepts from transition studies. This has led to a richer conceptualisation of transitions and the extent to which policy makers can actively influence them. Transport and land-use transitions can be seen as resulting from the interaction between established and novel structures and practices and exogenous developments. In historic case studies carried out in Munich and Zürich, we see that in transitions that have taken place troubles, or difficulties that people experience in their daily lives, play an important role in focusing political debates. In the process of reaching consensus regarding problems and solutions, interest groups, coalition building and both implicit and explicit societal rules open to conflict and supportive of its resolution play a pivotal role. To aid in supporting transition attempts, a reflexive planning approach has been developed and tested in the region of Amsterdam. The breadth of the focus in this approach in terms of developments considered and actors involved resulted in potential solutions that differed from traditional policy in terms of innovativeness and the extent of support for them.
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This paper focuses on the use of discrete event simulation (DES) as a decision support tool for airport land use development. As a study case, Querétaro Airport (Mexico) is used, due to its rapid growth and the different services it offers. The SIMIO® software was used to carry out a macro-level simulation of the airport’s processes, considering generic process times, flight types and demand schedules. The resulting strategic simulation model can be used to diagnose the current growth situation, analyse the airport's growth potential, and evaluate different expansion scenarios using the available land, including the expansion of the terminal building, cargo operations or MRO. The arrival and departure of aircraft (commercial, cargo, maintenance, aviation school and private aviation) at the airport were simulated to detect bottlenecks for different expansion scenarios, that aim to find an optimal balance between the growth options in the different airport grounds. The objective is to compare the potential growth of different layout expansion possibilities. Preliminary results indicate that land use options have a great impact on the growth potential of the airport and some general aviation activities, such as the aviation school, are interfering with the potential growth of other activities at Querétaro Airport.
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In this article, we assess the potential of alternative land use systems using non-drainage peatland species which could eventually phase out or partly replace oil palm plantations on undrainable peatlands. We have used the ecosystem services approach to analyse what scenarios using drainage-free peatland species could be suitable alternatives for oil palm cultivation on peat and how these scenarios compare to oil palm plantations in terms of selected ecosystem services. Our results indicate that alternative paludiculture systems will provide more direct and indirect ecosystem services than oil palm plantations on peat. We also found that stakeholders were aware of issues with growing oil palm on peat, and that there was a general intention for sustainable use of peatlands amongst several groups of stakeholders. Replacing oil palm with alternative systems such as paludiculture in Malaysia is not yet realistic. The most important impediments are a lack of knowledge on potential of non-drainage peatland species and its associated value chains, as well as the technical difficulty for smallholders to implement such a system. We recommend starting experimental plantings with paludiculture systems to further test species performance, life cycle analysis, growth, intercropping limitations and possibilities, yields and improvements in the value chain.
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Land subsidence in areas with weak soils affects a large part of the Netherlands and causes manyproblems. To solve them diverse and specialized knowledge of possible measures to prevent, mitigate or reverse land subsidence is needed. This knowledge is fragmented over many agencies, companies and individuals. Here we show how data and knowledge are related and we stress the importance of implicit knowledge for knowledge transfer on land subsidence. It is demonstrated that land subsidence in the Netherlands is a “wicked problem”.This makes its solution cumbersome. However, we show that self-learning digital environments can help considerably in knowledge acquisition, storage and retrieval. We give an inventory of research questions that have still to be answered to make an digital environment really effective for a wicked problem like land subsidence.
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Land subsidence in areas with weak soils affects a large part of the Netherlands and causes manyproblems. To solve them diverse and specialized knowledge of possible measures to prevent, mitigate or reverse land subsidence is needed. This knowledge is fragmented over many agencies, companies and individuals. Here we show how data and knowledge are related and we stress the importance of implicit knowledge for knowledge transfer on land subsidence.
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This paper pioneers the assessment of tourism's total global resource use, including its fossil fuel consumption, associated CO2 emissions, fresh water, land, and food use. As tourism is a dynamic growth system, characterized by rapidly increasing tourist numbers, understanding its past, current, and future contributions to global resource use is a central requirement for sustainable tourism assessments. The paper introduces the concept of resource use intensities (RUIs), which represent tourism's resource needs per unit of consumption (e.g. energy per guest night). Based on estimates of RUIs, a first assessment of tourism's global resource use and emissions is provided for the period 1900–2050, utilizing the Peeters Global Tourism Transport Model. Results indicate that the current (2010) global tourism system may require c.16,700 PJ of energy, 138 km3 of fresh water, 62,000 km2 of land, and 39.4 Mt of food, also causing emissions of 1.12 Gt CO2. Despite efforts to implement more sustainable forms of tourism, analysis indicates that tourism's overall resource consumption may grow by between 92% (water) and 189% (land use) in the period 2010–2050. To maintain the global tourism system consequently requires rapidly growing resource inputs, while the system is simultaneously becoming increasingly vulnerable to disruptions in resource flows.
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The increasing demand for Prunus africana resources is an opportunity for its conservation and commercial use to support livelihoods in Africa. The objective for this study was to investigate major steps to advance production of P. africana for long-term commercial use in Uganda. Specific objectives were to explore potential production schemes, setbacks in production and strategies to advance it. The study was done by review of literature, documents and interviews with experts. Results indicated Agroforestry and large plantations to be useful schemes for production. Identified setbacks are: low trade in P. africana, unknown returns from production, competing land uses, long growth period, limited market assurance and information. The lack of a resource assessment for P. africana in forests contributes to its low trade which undermines related economic benefits for national development and incentives to commercial production. We propose that a national Quantitative resource assessment of P. africana in forests is one of the crucial steps that should be undertaken to carefully organise and advance sustainable trade to provide rational incentives for commercial production. Subsequently, production should be localised in suitable sites and producers be organised into cooperatives. Further research to improve returns from commercial production of P. africana is needed.
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Vacant land can provide social and ecological benefits to cities as they are informally used by people and spontaneously populated by animals and plant-life. However, planners and policy makers often frame vacant land as ‘empty’, ‘blank’ spaces, making it difficult to acknowledge informal and more-than-human shaping of these places. This paper demonstrates how a reconceptualization of vacant land through a relational lens enables the inclusion of informal and more-than-human placemaking in planning policy. Analysing the recent Scottish planning policy debate on vacant land through the analysis of policy documents and key informant interviews, we demonstrate that the inclusion of informal and more-than-human placemaking in the Scottish planning policy is fostered by growing recognition of concepts such as urban biodiversity, but hindered by persistent nature-culture divisions. Waymarkers for future policy making are, firstly, strengthening the presence of informal and more-than-human actors in policy debates by seeking representatives who can speak on their behalf and, secondly, supporting new placemaking traditions specifically for vacant land that are incremental and collaborative.
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This book contains the abstracts of the 4th European Agroforestry Conference carried out in the city of Nijmegen (The Netherlands) during the European Green Capital 2018. The book has plenty of extraordinary information and experiences about agroforestry practices and systems around the world including Africa, America and Europe.
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The majority of Dutch peatlands are drained and used intensively as grasslands for dairy farming. This delivers high productivity but causes severe damage to the provisioning of ecosystem services. Peatland rewetting is the best way to reverse the damage, but high water levels do not fit with intensive dairy production. Paludiculture, defined as crop production under wet conditions, provides viable land use alternatives, but these alternatives are rarely compared to conventional drainage-based systems. Here, we compare ecosystem services of six theoretical production systems on peatland following a gradient of low, medium, and high water levels. This includes conventional and organic drainage-based dairy farming, low-input grasslands for grazing and mowing, and high-input paludiculture systems with reed and Sphagnum cultivation. For each production system, a theoretical 1 ha unit was designed using data from literature. Four aspects of ecosystem services were quantified and monetized, including agricultural productivity, reduction of greenhouse gas emissions, water storage, and biodiversity potential. Results show that drainage-based dairy farming systems only support high milk production without any of the other ecosystem services included, even with organic farming practices. Biomass producing paludiculture systems have high ecosystem services value, but do not lead to production values comparable to the present dairy farming. Capitalizing GHG reduction and other ecosystem services from peatland rewetting with carbon credits or other payment schemes would close this production and income gap. However, standard practice to monetize provision of ecosystem service is currently unavailable. Sustainable use of peatlands urges more fundamental changes in land and water management along with the financial and policy support required.
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