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Overzichtsartikel voor buitenlandse planologen over een aantal nieuwe ontwikkelingen in de ruimtelijke ordening in Nederland: de stormvloedkering in de Oosterschelde, hoogspanningsleidingen en afval van stortplaatsen

Over the past decades, observed increases in temperature have been particularly pronounced in mountain regions. If this trend should continue in the 21st Century, frequency and intensity of droughts will increase, and will pose major challenges for forest management. Under current conditions drought-related tree mortality is already an important factor of forest ecosystems in dry inner-Alpine valleys. Here we assess the sensitivity of forest ecosystems to climate change and evaluate alternative forest management strategies in the Visp region. We integrate data from forest monitoring plots, field experiments and dynamic forests models to evaluate how the forest ecosystem services timber production, protection against natural hazards, carbon storage and biodiversity will be impacted. Our results suggest that at dry low elevation sites the drought tolerance of native tree species will be exceeded so that in the longer term a transition to more drought-adapted species should be considered. At medium elevations, drought and insect disturbances as by bark beetles are projected to be important for forest development, while at high elevations forests are projected to expand and grow better. All of the ecosystem services that we considered are projected to be impacted by changing forest conditions, with the specific impacts often being elevation-dependent. In the medium term, forest management that aims to increase the resilience of forests to drought can help maintain forest ecosystem services temporarily. However, our results suggest that relatively rigid management interventions are required to achieve significant effects. By using a combination of environmental monitoring, field experiments and modeling, we are able to gain insight into how forest ecosystem, and the services they provide, will respond to future changes.

Die Realisierung von Energieeinsparungen mithilfe von Gewächshausdächern aus Isolierglas erfordert meist hohe Investitionen. Auf der Suche nach einer kostengünstigeren Alternative hat ein Konsortium der Unternehmen VDH Plastic Greenhouses, Van der Valk Horti Systems, AGC Chemicals Europe und Boal Systems das Gewächshausdachkonzept ‘2SaveEnergy’ entwickelt und im Sommer 2014 realisiert. Die Kombination von Klarglas und diffuser ETFE-Folie als Bedachung mit einem doppelten Energieschirm mit einem Zwischenraumvon nur wenigen Zentimetern führte im Versuchsjahr 2015 zu einer guten Tomatenproduktion bei geringem Energieverbrauch. Die Produktion selbst erfolgte weitestmöglich nach den Grundsätzen der ‘Neuen Kulturverfahren’. Im Vergleich zur üblichen Praxis war der Energieverbrauch bei mindestens gleicher Produktion 50% geringer. Energy savings through a greenhouse cover of insulation glass requires a large investment. In the search for a cheaper alternative by a consortium of companies consisting of VDH Plastic Greenhouses, Van der Valk Horti Systems, AGC Chemicals Europe en Boal Systems a Glass-Film-greenhouse cover, better known as the 2SaveEnergy greenhouse concept was realized in summer 2014. The combination of clear glass with a diffuse ETFE film and a double screen mounted at a distance of only a few centimetres, in the year 2015, resulted in a low energy consumption and a better than expected good tomato production. During cultivation, the principles of the new cultivation methods were used. With respect to the common practice, the energy consumption was more than 50% lower at a minimum equal production.

Data on the potential generation of energy from wind, solar and biomass is crucial for analysing their development, as it sets the limits on how much additional capacity it is feasible to install. This paper presents the methodologies used for the development of ENSPRESO, ENergy System Potentials for Renewable Energy SOurces, an EU-28 wide, open dataset for energy models on renewable energy potentials, at national and regional levels for the 2010–2050 period. In ENSPRESO, coherent GIS-based land-restriction scenarios are developed. For wind, resource evaluation also considers setback distances, as well as high resolution geo-spatial wind speed data. For solar, potentials are derived from irradiation data and available area for solar applications. Both wind and solar have separately a potential electricity production which is equivalent to three times the EU's 2016 electricity demand, with wind onshore and solar requiring 16% and 1.4% of total land, respectively. For biomass, agriculture, forestry and waste sectors are considered. Their respective sustainable potentials are equivalent to a minimum 10%, 1.5% and 1% of the total EU primary energy use. ENSPRESO can enrich the results of any energy model (e.g. JRC-EU-TIMES) by improving its analyses of the competition and complementarity of energy technologies.