Zoekresultaten

Production in peatlands

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.

The interplay between land use, travel behaviour and attitudes: a quest for causality.

Agroforestry as sustainable land use

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.

An ecosystem services analysis of oil palm and alternative land use systems on peat in Malaysia

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.

Simulation as a decision support tool for airport land use developments

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.

Transitioning the Transport and Land-use system

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.