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Authors: van Oudenhoven, A.P.E.; Advisor: -; Participants: Schröter, M.; Drakou, E.G. (2018) - We synthesized 16 criteria for ES indicator selection and organized them according to the widely used categories of credibility, salience, legitimacy (CSL). We propose to consider additional criteria related to feasibility (F), as CSL criteria alone often seem to produce indicators which are unachievable in practice. Considering CSLF together requires a combination of scientific knowledge, communication skills, policy and governance insights and on-field experience. In conclusion, we present a checklist to evaluate CSLF of your ES indicators. This checklist helps to detect and mitigate critical shortcomings in an early phase of the development process, and aids the development of effective indicators to inform actual policy decisions.
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Authors: Ostermann, F. O.; Advisor: -; Participants: Garcia-Chapeton, G.; Kraak, M. J.; Zurita-Milla, R. (2018) - This paper presents a conceptual model and a proof-of-concept implementation of a novel approach to engage citizens in supervising the analysis of user-generated geographic content (UGGC).The complexity of some tasks and the increasing volume of UGGC often restrict the role of citizens to data providers. We propose a hybrid processing approach, which maps geographical problems into data mining and machine-learning tasks, presents analysis results to human supervisors, and uses the responses to improve the machine-learning and data mining. For the pilot study, we adapt an approach to find semantically distinct places in UGGC.
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Authors: Zhang, Z.; Advisor: -; Participants: Gerke, M.; Vosselman, G.; Yang, M. Y. (2018) - Results show that the standard Lidar filter is robust to random noise. However, artefacts and blunders in the DIM points often appear due to low contrast or poor texture in the images. Filtering will be erroneous in these locations. Filtering the DIM points pre-processed by a ranking filter will bring higher Type II error (i.e. non-ground
points actually labelled as ground points) but much lower Type I error (i.e. bare ground points labelled as non-ground points). Finally, the potential DTM accuracy that can be achieved by DIM points is evaluated. Two DIM point clouds derived by Pix4Dmapper and SURE are compared. On grassland dense matching generates points higher than the true terrain surface, which will result in incorrectly elevated DTMs. The application of the ranking filter le...
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Authors: Eliades, M.; Advisor: -; Participants: Bruggeman, A.; Djuma, H.; Lubczynski, M. W. (2018) - This study aims to examine interactions between tree characteristics, sap flow, and environmental variables in an open Pinus brutia (Ten.) forest with shallow soil. We examined radial and azimuthal variations of sap flux density (Jp), and also investigated the occurrence of hydraulic redistribution mechanisms, quantified nocturnal tree transpiration, and analyzed the total water use of P. brutia trees during a three-year period. Sap flow and soil moisture sensors were installed onto and around eight trees, situated in the foothills of the Troodos Mountains, Cyprus. Radial observations showed a linear decrease of sap flux densities with increasing sapwood depth. Azimuthal differences were found to be statistically insignificant. Reverse sap flow was observed during low vapor pressure...
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Authors: Budiati, W.; Advisor: -; Participants: Grigolon, A. B.; Brussel, M. J. G.; Rachmat, S. Y. (2018) - In this research, we measured the current conditions of proposed TOD areas in thirteen MRT stations in Jakarta to determine the potential TOD development. These thirteen stations were divided into three types based on environmental characteristics of the station location such as CBD, urban, and neighbourhood characteristics. The 5D of built environment variables were used as indicators to
examine the potential of TOD areas. Then, stakeholders were involved to fit and weigh the indicators. TOD indexes for each station were examined to identify potential improvement strategies. Each station is classified as having a high, medium or low TOD index. By understanding the specific strategies for different TOD indexes, this paper is intended to support those development areas to improve lo...
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Authors: Ronzhin, S.; Advisor: -; Participants: Folmer, E. J. A.; Lemmens, R. L. G. (2018) - Modern software tools for managing Linked Data are often designed for skilled users. Therefore, they cannot be used for education
purposes because they require substantial a priori knowledge about the Resource Description Framework and the SPARQL query
language. LinkDaLe is a single page application designed to teach students the concept of Linked Data and work with linked data at
the same time. In the paper we showcase the interface and functionality of LinkDaLe by triplifying data on Geo4All member
organizations. The application was built and evaluated within The Business Process Integration Lab, a master programme course in
2016 and 2017 years. Positive feedback from both students and teachers proved the relevance of the proposed design consideration.
LinkDaLe showed usabil...
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Authors: Yoshikawa, K.; Maqhuzu, A.B.; Advisor: -; Participants: - (2018) - Crop residues and animal dung can contribute a significant portion to the biomass available for conversion to biofuels in Zimbabwe. This paper will extend a quantitative methodology involving the use of probability distributions to rigorously address uncertainty in the quantification of this biomass. The results of 100 000 Monte Carlo simulations using Palisade’s @Risk tool indicates the following at a 90% confidence interval: 2.55-5.50 million Mg/yr. of crop residue and 2.99-4.99 million Mg/yr. of dung is generated. The total exploitable energy was estimated at an annual mean of 26.6 and 16.9 million GJ for crop residue and dung respectively.
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Authors: Westen, C.V.; Astisiasari; Advisor: -; Participants: - (2018) - This paper aims to give a basic overview on the existing approaches for the assessment of multi-risk assessment along geothermal pipelines. It delivers basic principles on the analysis of risks and its contributing variables, in order to model the loss consequences. By considering the loss consequences, as well as the alternatives for mitigation measures, the environmental safety in geothermal working area could be enforced.
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Authors: Hutchins, M.G.; Hutchins, M.G.; Advisor: -; Participants: - (2018) - Changes to river flows, water temperature, river and reservoir quality were predicted under three contrasting future “storylines”; one an extension of present day rates of economic development, the others representing more extreme and less sustainable visions. Modelling revealed that lower baseflow conditions will arise under all storylines. For the less extreme storyline river water quality is likely to deteriorate but reservoir quality will improve slightly. The two more extreme futures could not be supported by current management strategies to meet water demand. To satisfy these scenarios, transfer of river water from outside the Thames river basin would be necessary. Consequently, some improvement over present day water quality in the river may be seen, and for most indicators c...
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Authors: Moller, P.; Masseroni, D.; Advisor: -; Participants: - (2018) - This study aims to evaluate the hydraulic, control and economical performances of the first automatic and remote-controlled system applied for traditional rice irrigation in Europe and tested in Italy during 2016 agricultural season. In particular, (i) the effects of automation on the water balance; (ii) the reliability of the irrigation system for a real-time control of flow regulation and water level management in the field and (iii) the economic viability of the investment are investigated. The results show that, despite the automatic system has not proven a decrease of water consumptions (ranging from 2000 to 3700 mm) or a significant increase of rice yield (of about 8 ton hectare−1), it has not revealed any mechanical malfunctioning during the irrigation season and it allows to...
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