Vries, S. de \ Nieuwenhuizen, W. \ Meeuwsen, H.A.M. \ 2018
Abstract: The aim of this research was to measure the influence the type of environment (land use) has on people’s reported happiness at a certain moment in time, with a view to formulating rules for quantifying the effect of spatial changes on wellbeing. The study focused on differences between built-up areas and more natural environments and between different types of natural environment. A smartphone app, called HappyHier, was developed for use by a broad sample population in the Netherlands, with push messages asking them to report how happy they felt at a certain moment. From 1 May to 28 July 2016, 4318 unique participants made use of the app, filling in at least one questionnaire on location. Part I of the report discussed the first part of the analysis, focusing mainly on differences in momentary happiness between different types of environment. Part II reports on the representativeness of the gathered data, the time spent in the diverse types of environment and the relationship between momentary happiness and life satisfaction.
Abstract: For the Assessment of the Dutch Human Environment we want to review what is known about social activities, initiatives and combination of functions for nature and biodiversity and what they contribute to enhancing biodiversity. In this study we collected data from the available literature and websites. These facts and figures show that most people are involved with nature in one way or another and that the involvement of individuals and businesses in some activities is even increasing. Most green citizens' initiatives are focused on amenity green space, but sometimes important natural values that support international biodiversity targets are also created. In addition, citizens play a vital role in monitoring plant and animal species. These facts and figures show also that in all current forms of land use there are possibilities and initiatives for nature combinations or for increasing biodiversity.
Abstract: Dit proefschrift draagt bij tot een beter begrip van de interacties tussen de bodem-waterplant systemen en tot meer geavanceerde procesgerichte modelmatige benaderingen. Bovendien wordt antwoord gegeven op vier onderzoeksvragen: 1. Wat is de rol van de verticale waterstromen zoals capillaire opstijging en recirculerend percolatiewater op de gewasopbrengsten? 2. Hoe kunnen we droogte-, zout- en zuurstof-stress modelleren en wat is hun invloed op de gewasopbrengsten? 3. Kunnen we de impact van verschillende stress-vormen op de graslandproductie in Nederland voorspellen? 4. Wat is de invloed van veranderingen in grondwaterstanden en landgebruik op gewasopbrengsten en grondwateraanvulling?
Abstract: Lowland streams are being restored to their natural situation throughout Europe. However, a lot of projects do not meet their goals. Furthermore, there is a knowledge gap on the restoration demands and the current understanding on the morphodynamics of low-energy streams. The focus of this thesis is on the morphodynamic evolution of the lowland stream the Dommel, in The Netherlands. The Dommel is located in the Roer Valley Graben and flows in the sandy deposits of the Boxtel formation. Due to the subsidence of the Roer Valley Graben, it is a good location to study sediment deposits. The used methods, are a combination of literature, Ground Penetrating Radar (GPR), auguring and Optical Stimulated Luminescence (OSL) dating. The results indicate a succession that started with a braided system during the Pleniglacial, to a large meandering system in the Late Glacial. Towards the end of the Younger Dryas the large meanders were abandoned and the system shifted to a lower energetic meandering system and eventually an immobile system. The stream kept its immobile river pattern until anthropogenic land use affected the stream by increasing the stream power, causing the Dommel to transit to a more energetic meandering pattern during the Bronze Age (Late Subboreal). It is concluded that the Dommel would have remain lateral immobile, if there were no anthropogenic influences in the catchment.
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