Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Water for food and ecosystems in the Baviaanskloof Mega Reserve : land and water resources assessment in the Baviaanskloof, Eastern Cape Province, South Africa
    Jansen, H.C. - \ 2008
    Wageningen : Alterra (Alterra-rapport 1812) - 80
    watervoorraden - bruikbaar land - waterbeheer - grondbeheer - natuurbescherming - duurzaamheid (sustainability) - ecosystemen - watersystemen - zuid-afrika - beleidsondersteuning - water resources - land resources - water management - land management - nature conservation - sustainability - ecosystems - water systems - south africa - policy support
    Climate interpolation for land resource and land use studies in mountainous regions
    Baigorria, G.A. - \ 2005
    Wageningen University. Promotor(en): Tom Veldkamp, co-promotor(en): Jetse Stoorvogel. - Wageningen : - ISBN 9789085042389 - 168
    klimaat - weersgegevens - weersvoorspelling - weer - bruikbaar land - landgebruik - berggebieden - peru - ecuador - andes - climate - weather data - weather forecasting - weather - land resources - land use - mountain areas - peru - ecuador - andes
    Researchers in the field of land resources and land use are increasingly faced with a serious data constraint. New techniques like simulation models require detailed and quantitative data on climate and soils. Large mapping units with representative weather stations or representative soil profiles ignore an important part of the inherent spatial variability of the landscape.New techniques involving geographical information systems (GIS), geostatistics, and remote sensing open new opportunities.A good example in the field of soil science arethe rapid advances in digital soil mapping. The main objective of this research is to resolve the data constraint related to the meteorological data through the interpolation of meteorological data from weather stations and to explore the value of the newly created datasets in the field of land resource and land use studies. Research focused on two areas in the Peruvian and Ecuadorian Andean highlands: (i) La Encañada and Tambomayo watersheds in Peru (2950 to 4000 meters above sea level) where agriculture is performed in marginal areas; and (ii) Chitan and San Gabriel watersheds in Ecuador (2700 to 3840 meters above sea level) where agriculture is commercially oriented to the production of potato and milk. During the first step, empiric and physical process-based models for climate interpolation were developed, calibrated, evaluated and validated to be applied under topography-complex terrains. The use of seasonal-climate forecast from Global Circulation Models' (GCM) was also analyzed to explore the feasibility to support decision makers. Effects of detailed-spatial climate information as a soil-forming factor were analyzed as a basis for digital soil mapping to disaggregate soil mapping units, and the question of how much information do we really need for land resources and land use studies was assessed. As results, two physical process-based models to interpolate maximum and minimum temperatures, and rainfall were developed and four empirical models to estimate incident solar radiation were evaluated and calibrated. The feasibility to produce crop-yield's forecast by downscaling GCM's outputs was assessed by linking statistical and crop models aggregated at watershed level. Theory of soil forming factors applicable at large scales was demonstrated to be applicable also at small scales by using the detailed interpolated climate information. Finally, an analysis with the Tradeoff Analysis system to assess the impact of different resolutions of input data gave as a result that there is not a thumb rule to establish the resolution's threshold. To each study case a sensitivity analysis must be performed to specifically establish the threshold resolution according to the project objectives, the biophysical and economic model to be used, and to the necessities of the different stakeholders among other main factors.
    Land and forest economics
    Kooten, G.C. van; Folmer, H. - \ 2004
    Cheltenham, United Kingdom : Edward Elgar - ISBN 9781843768814 - 552
    bosbouweconomie - agrarische economie - landgebruik - hulpbronnenbeheer - hulpbronnenbehoud - bruikbaar land - landschapsbescherming - forest economics - agricultural economics - land use - resource management - resource conservation - land resources - landscape conservation
    This text provides a comprehensive introduction to the important issues of land use and forest economics. The authors employ economic tools to study the allocation of land among alternative activities such as agriculture, grazing and forestry which impact upon the landscape.
    GammaGroen rapporten : onderzoeksprogramma GammaGroen
    Veeneklaas, F.R. - \ 2003
    Den Haag : LEI Wageningen UR (Alterra-rapport 823)
    platteland - plattelandssamenleving - plattelandseconomie - rurale welzijnszorg - ontvolking van het platteland - bruikbaar land - natuurlijke hulpbronnen - nederland - rural areas - rural society - rural economy - rural welfare - rural depopulation - land resources - natural resources - netherlands
    A taxotransfer rule-based approach for filling gaps in measured soil data in primary SOTER databases
    Batjes, N.H. - \ 2003
    Wageningen : ISRIC - World Soil Information (Report / ISRIC World Soil Information 2003/03)
    bruikbaar land - informatiesystemen - databanken - land resources - information systems - databases
    Knowledge of the Land: Land Resources Information and it's Use in Rural Development
    Dalal-Clayton, D.B. ; Dent, D. - \ 2001
    Oxford : Oxford University Press - ISBN 9780198296010 - 446
    bruikbaar land - landevaluatie - plattelandsontwikkeling - gegevensverwerking - informatieverwerking - remote sensing - landgebruiksplanning - milieueffect - duurzaamheid (sustainability) - participatie - tanzania - sri lanka - land resources - land evaluation - rural development - data processing - information processing - remote sensing - land use planning - environmental impact - sustainability - participation - tanzania - sri lanka
    Land use analysis and planning for sustainable food security: with an illustration for the state of Haryana, India
    Aggarwal, P.K. ; Roetter, R.P. ; Kalra, N. ; Keulen, H. van; Hoanh, C.T. ; Laar, H.H. van - \ 2001
    New Delhi [etc.] : IARI [etc.] - ISBN 9789712201684 - 167
    landgebruik - analyse - landgebruiksplanning - duurzaamheid (sustainability) - gewasproductie - bruikbaar land - bedrijfssystemen - voedselproductie - optimalisatie - modellen - india - beslissingsondersteunende systemen - bemesting - gewasbescherming - landbouw - milieu - waterbeheer - Azië - land use - analysis - land use planning - sustainability - crop production - land resources - farming systems - food production - optimization - models - india - decision support systems
    SOTER summary file for Central and Eastern Europe (ver. 1.0)
    Batjes, N.H. - \ 2000
    Wageningen : ISRIC - World Soil Information (ISRIC Report 2000/06) - 11
    bruikbaar land - informatiesystemen - databanken - bodem - cartografie - gegevens verzamelen - landevaluatie - centraal-europa - land resources - information systems - databases - soil - mapping - data collection - land evaluation - central europe
    Ruimtedruk Zuidelijke Randstad
    Rijk, P.J. ; Vreke, J. - \ 2000
    onbekend : LEI (Rapport LEI 4.0011) - ISBN 9789052425825 - 68
    ruimtelijke ordening - landbouwgrond - kapitaalmarkt - bezit - nederland - landgebruik - grondbeheer - bruikbaar land - grondmarkten - grondprijzen - overdrachten van grond - zuid-holland - physical planning - agricultural land - capital market - land use - land management - land resources - land markets - land prices - land transfers - property - netherlands - zuid-holland
    Op verzoek van de directie Zuidwest van het Ministerie van Landbouw, Natuurbeheer en Visserij heeft het LEI onderzoek uitgevoerd naar de ruimtedruk in de Zuidelijke Randstad. Hierbij is zowel gekeken naar de huidige als naar de toekomstige ruimtedruk. Ook wordt inzicht gegeven in de diverse prijsvormings- en verwervingsprocessen van grond. Om de regionale verschillen aan te geven zijn 9 landbouwgebieden in Zuid-Holland onderscheiden. Per gebied wordt inzicht gegeven in aantallen inwoners, bevolkingsdicht-heid, type grondgebruik en m2 groen per inwoner, grondprijzen, verhandelde arealen en type verwervers. Ook is per gebied de oppervlakte en het type van toekomstige ruimtelijk plannen bepaald (wonen, werken, groen en infrastructuur). Een beeld van de regionale grondspanning is verkregen door de gemiddelde toekom-stige vraag (uit de ruimtelijke plannen) te confronteren met het gemiddelde jaarlijkse verwachte vrije grondaanbod. Oplossingsrichtingen worden aangereikt hoe omgegaan kan worden met de disharmonie tussen vraag en aanbod van grond.
    Changes in agriculture and land use in Europe
    Rabbinge, R. ; Diepen, C.A. van - \ 2000
    European Journal of Agronomy 13 (2000). - ISSN 1161-0301 - p. 85 - 99.
    landgebruik - bruikbaar land - opbrengsten - grondvermogen - landen van de europese unie - land use - land resources - yields - land capability - european union countries
    Changes in land use and agriculture have occurred frequently during the last millennium in Europe. Now at the start of the millennium a review of how and why changes took place may lead to a better understanding of these developments. This insight based on scientific analysis and understanding may be combined with explorative studies to gain a view on future possibilities. Such an explorative study for Europe is described. It demonstrates that contraction of agricultural area in the coming decades is inevitable and in line with an historic development where periods of expansion and contraction of agricultural area were intermingled. The new millennium will start with a period of changes in land use to fulfill societal goals in an optimum way. The research agenda that helps to define optimal land use and agricultural methods is based on this analysis and helps to develop the policy agenda for the near future
    Geographical information modelling for land resource survey
    Bruin, S. de - \ 2000
    Agricultural University. Promotor(en): M. Molenaar; A.K. Bregt. - S.l. : S.n. - ISBN 9789058082114 - 131
    bruikbaar land - landgebruik - luchtkarteringen - cartografie - geografische informatiesystemen - gegevensanalyse - gegevens verzamelen - beeldverwerking - modellen - spanje - digitaal terreinmodel - land resources - land use - aerial surveys - mapping - geographical information systems - data analysis - data collection - image processing - models - spain - digital elevation model

    The increasing popularity of geographical information systems (GIS) has at least three major implications for land resources survey. Firstly, GIS allows alternative and richer representation of spatial phenomena than is possible with the traditional paper map. Secondly, digital technology has improved the accessibility of ancillary data, such as digital elevation models and remotely sensed imagery, and the possibilities of incorporating these into target database production. Thirdly, owing to the greater distance between data producers and consumers there is a greater need for uncertainty analysis. However, partly due to disciplinary gaps, the introduction of GIS has not resulted in a thorough adjustment of traditional survey methods. Against this background, the overall objective of this study was to explore and demonstrate the utility of new concepts and tools within the context of pedological and agronomical land surveys. To this end, research was conducted on the interface between five fields of study: geographic information theory, land resource survey, remote sensing, statistics and fuzzy set theory. A demonstration site was chosen around the village of Alora in southern Spain.

    Fuzzy set theory provides a formalism to deal with classes that are partly indistinct as a result of vague class intensions. Fuzzy sets are characterised by membership functions that assign real numbers from the interval [0, 1] to elements, thereby indicating the grade of membership in that set. When fuzzy membership functions are used to classify attribute data linked to geometrical elements, presence of spatial dependence among these elements ensures that they form spatially contiguous regions. These can be interpreted as objects with indeterminate boundaries or fuzzy objects. Fuzzy set theory thus adds to the conventional conceptual data models that assume either discrete spatial objects or continuous fields.

    This thesis includes two case studies that demonstrate the use of the fuzzy set theory in the acquisition and querying of geographical information. The first study explored the use of fuzzy c -means clustering of attribute data derived from a digital elevation model to represent transition zones in a soil-landscape model. Validity evaluation of the resulting terrain descriptions was based on the coefficient of determination of regressing topsoil clay data on membership grades. Vaguely bounded regions were more closely related to the observed variation of clay content () than crisply bounded units as used in a conventional soil survey ().

    The second case study involved the use of the fuzzy set theory in querying uncertain geographical data. It explains differences between fuzziness and stochastic uncertainty on the basis of an example query concerning loss of forest and ease of access. Relationships between probabilities and fuzzy set memberships were established using a linguistic probability qualifier (high probability) and the expectation of a membership function defined on a stochastic travel time. Fuzzy query processing was compared with crisp processing. The fuzzy query response contained more information because, unlike the crisp response, it indicated the degree to which individual locations matched the vague selection criteria.

    In a land resource survey, data acquisition typically involves collecting a small sample of precisely measured primary data as well as a larger or even exhaustive sample of related secondary data. Soil surveyors often rely on soil-landscape relationships and image interpretation to enable efficient mapping of soil properties. Yet, they generally fail to communicate about the knowledge and methods employed in deriving map units and statements about their content.

    In this thesis, a methodological framework is formulated and demonstrated that takes advantage of GIS to interactively formalise soil-landscape knowledge using stepwise image interpretation and inductive learning of soil-landscape relationships. It examines topology to record potential part of links between hierarchically nested terrain objects corresponding to distinct soil formation regimes. These relationships can be applied in similar areas to facilitate image interpretation by restricting possible lower level objects. GIS visualisation tools can be used to create images (e.g. perspective views) illustrating the landscape configuration of interpreted terrain objects. The framework is expected to support different methods for analysing and describing soil variation in relation to a terrain description, including those requiring alternative conceptual data models. In this thesis, though, it is only demonstrated with the discrete object model.

    Satellite remote sensing has become an important tool in land cover mapping, providing an attractive supplement to relatively inefficient ground surveys. A common approach to extract land cover data from remotely sensed imagery is by probabilistic classification of multispectral data. Additional information can be incorporated into such classification, for example by translating it into Bayesian prior probabilities for each land cover type. This is particularly advantageous in the case of spectral overlap among target classes, i.e. when unequivocal class assignment based on spectral data alone is impossible.

    This thesis demonstrates a procedure to iteratively estimate regional prior class probabilities pertaining to areas resulting from image stratification. This method thus allows the incorporation of additional information into the classification process without the requirement of known prior class probabilities. The demonstration project involved Landsat TM imagery from 1984 and 1995. Image stratification was based on a geological map of the study area. Overall classification accuracy improved from 76% to 90% (1984) and from 64% to 69% (1995) when employing iteratively estimated prior probabilities.

    The fact that any landscape description is a model based on a limited sample of measured target attribute data implies that it is never completely certain. The presence of error or inaccuracy in the data contributes significantly to such uncertainty. Usually, the accuracy of land survey datasets is indicated using global indices (e.g. see above). Error modelling, on the other hand, allows an indication of the spatial distribution of possible map inaccuracies to be given. This study explored two approaches to error modelling, which are demonstrated within the context of land cover analysis using remotely sensed imagery.

    The first approach involves the use of local class probabilities conditional to the pixels' spectral data. These probabilities are intermediate results of probabilistic image classification and indicate the magnitude and distribution of classification uncertainty. A case study demonstrated the implication of such uncertainty on change detection by comparing independently classified images. A major shortcoming of this approach is that it implicitly assumes data in neighbouring pixels to be independent. Moreover, it does not make full use of available reference data as it ignores their spatial component. It does not consider data locations nor does it use spatial dependence models that can be derived from the reference data.

    The assumption of independent pixels obviously impedes proper assessment of spatial uncertainty, such as joint uncertainty about the land cover class at several pixels taken together. Therefore, the second approach was based on geostatistical methods, which exploit spatial dependence rather than ignoring it. It is demonstrated how the above conditional probabilities can be updated by conditioning on sampled reference data at their locations. Stochastic simulation was used to generate a set of 500 equally probable maps, from which uncertainties regarding the spatial extent of contiguous olive orchards could be inferred.

    Future challenges include studies on other quality aspects of land survey datasets. The present research was limited to uncertainty analysis, so that, for example, data precision and fitness for use were not addressed. Other potential extensions to this work concern full inclusion of the third spatial dimension and modelling of temporal aspects.

    Groene grond in ruimtelijke perspectieven
    Goetgeluk, R. ; Helming, J.F.M. ; Luijt, J. ; Schotten, K. - \ 1999
    Den Haag : LEI (Rapport LEI 4.99.18) - ISBN 9789052425207 - 107
    plattelandsontwikkeling - groene zones - urbanisatie - landgebruik - bruikbaar land - grondprijzen - grondmarkten - overheidsbeleid - natuur - rural development - green belts - urbanization - land use - land resources - land prices - land markets - government policy - nature
    De langetermijngrondmarkteffecten van de ruimtelijke perspectieven Palet (geen ruimtelijke ordening) en Stedenland+ (huidige situatie met stedelijke ontwikkeling langs de internationale vervoersassen) lopen nogal uiteen. Zo is er in Palet sprake van een ongesegmenteerde grondmarkt met relatief hoge 'agrarische' grondprijzen in het landelijk gebied, van versnipperd grondgebruik en een hoge grondmobiliteit. In Stedenland+ zijn er grote grondprijsverschillen tussen de diverse stedelijke en niet-stedelijke segmenten en is er sprake van hoge agrarische grondprijzen wanneer voor de landbouw wordt uitgegaan van evenwichtsbemesting. Grond voor wonen en werken is in Stedenland+ relatief duur omdat het daarvoor ter beschikking staande areaal kunstmatig schaars wordt gehouden. De uitbreiding van de Ecologische Hoofd Structuur kan daarentegen tegen lage kosten binnen het agrarische segment worden gerealiseerd, indien bij grondeigenaren niet de verwachting wordt gewekt dat 'rood voor groen betaalt'.
    Ecologische aspecten van landgebruik: LCA en biodiversiteit
    Dobben, H.F. van - \ 1999
    Nederlands Bosbouwtijdschrift 71 (1999)6. - ISSN 0028-2057 - p. 244 - 248.
    landgebruik - bruikbaar land - hulpbronnengebruik - biodiversiteit - soortendiversiteit - milieu - milieueffect - beoordeling - analyse - levenscyclus - levenscyclusanalyse - land use - land resources - resource utilization - biodiversity - species diversity - environment - environmental impact - assessment - analysis - life cycle - life cycle assessment
    LCA (levenscyclus-analyse) is een methode om de milieu-effecten van productie en gebruik van een object in kaart te brengen. In het artikel wordt getracht het landgebruik van een activiteit en het daarmee gepaard gaande verlies aan biodiversiteit te kwantificeren en mee te nemen in LCA-studies.Een en ander op mondiaal niveau en uitgewerkt voor verschillende soorten menselijke activiteiten (o.a. zandwinning in Europees landbouwgebied; bauxietwinning in Zuid-amerikaans tropisch bos)
    Voldoende, goed land
    Hellinga, F. - \ 1981
    Wageningen : Landbouwhogeschool - 16
    land - huisvesting - bodem - bruikbaar land - bodemkunde - ontginning - landinrichting - ruimtelijke ordening - planning - beleid - ontwikkeling - nederland - landbouw - regionale economie - openbare redes - land - housing - soil - land resources - soil science - reclamation - land development - physical planning - planning - policy - development - netherlands - agriculture - regional economics - public speeches
    Rede Wageningen, 5 november 1981
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