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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Spatial modelling and monitoring of natural landscapes with cases in the Amsterdam Waterworks Dunes
Droesen, W. - \ 1999
Agricultural University. Promotor(en): M. Molenaar; J. Sevink. - S.l. : Droesen - ISBN 9789058080547 - 163
ruimtelijke ordening - modellen - landschap - monitoring - geografische informatiesystemen - duinen - nederland - duingebieden - natuurlandschap - kennemerland - physical planning - models - landscape - geographical information systems - dunes - netherlands - duneland - natural landscape
<p>The utilisation of geographic information systems and digital image processing techniques for the construction of digital landscape models necessitate for a reconsideration of the classical concepts for landscape ecological mapping. In this thesis, some methods are presented for the spatial modelling and monitoring of natural landscapes based upon digital workflow information.</p><p>In spatial information processing, two major approaches for the conceptual representation of spatial features are distinguished, the field and spatial object respectively. A field is a feature which is contiguously distributed over space and time. The object approach, on the contrary, assumes that the earth´s surface is populated with spatially interacting discrete units. Because natural landscapes often show both continuous and discrete variation in space and time, a hybrid terrain description is proposed, denoted as ´spatial object with nested field´. In this hybrid approach the discrete landscape patterns are described by spatial objects, while the internal spatial variability within an spatial object is represented by a field.</p><p>Classification is applied during the construction of the spatial objects and nested fields, because it is acknowledged to be a powerful technique to extract essential information from the background of infinite complexity. Crisp classification yields discrete attribute values and is therefore suitable for the definition and construction of spatial objects. The representation of continuously varying terrain features requires a continuous type of classification, i.e. fuzzy classification. Throughout this thesis, fuzzy classification is applied to construct fields.The concepts for spatial modelling, that were introduced above, were used in three cases resulting from the landscape management practice in the Amsterdam Waterworks Dunes:</p><p><em>Spatio-temporal mapping of the vegetation structure from high resolution CIR-images</em></p><p>Two radiometrically corrected, digital colour infrared orthophotos from the summer of 1990 and 1995 with a resolution of 0.25 metre were semi-automatically interpreted. Crisp and fuzzy classification techniques were applied to construct the spatial objects and their nested fields, representing the vegetation structure of the test site. Compared to manual photo-interpretation, the semi-automatic interpretation of vegetation structure results in a more realistic, more detailed and less subjective digital representation of the landscape.</p><p>Subsequently, the vegetation structural dynamics were explored on the basis of this multi-temporal data set. Methods are presented to answer two primary questions relevant to nature managers, regarding the turnover between cover types and the changes in the spatial structure. It appeared necessary to aggregate the spatial objects provided by the image interpretation to composite objects prior to the spatio-temporal analysis, because thematic and geometric inaccuracies in the data can yield faulty analysis results.</p><p><em>Estimation of the spatial distribution of vegetation communities from environmental data</em></p><p>In addition to information about vegetation structural dynamics, there is a need for information on changes in the vegetation composition. This information can be provided by a multi-temporal map of vegetation communities. An experiment was conducted to estimate the presence of vegetation communities from environmental data, including vegetation structural data.</p><p>A reliable procedure for the automatic mapping of vegetation communities from environmental data requires a fine tuned definition of the vegetation communities and a powerful explanatory model. The first condition was met by applying the concept of fuzzy vegetation communities. After the optimisation of the degree of vagueness, the fuzzy vegetation community types show a closer resemblance with the vegetation abundance data in the relevees compared to the classical crisp vegetation classes. The second objective, i.e. the construction of a powerful explanatory model, was not successfully achieved. Clearly, vegetation structural data are not sufficient to map the vegetation composition in dunes. Additional information regarding some abiotic site characteristics seem indispensable to improve the explanatory power of the model.</p><p><em>Fuzzy ecohydrological expert modelling of dune slacks</em></p><p>The thesis also describes the fuzzy ecohydrological expert model ECOMOD. The model predicts the primary parameters for the specification of ecotopes, i.e. vegetation structure, moisture content, nutrient availability and acidity of the soil. ECOMOD is calibrated for dune slacks by a team of experts. These experts estimated the parameters of the membership functions that quantify the fuzzy classes and fuzzy relations constituting the model. Experts apply vagueness or fuzziness in order to quantify the continuous turnover between classes and to quantify the uncertainty related to their knowledge. Therefore, fuzzy expert models like ECOMOD enable the robust modelling of complex systems, even if relatively little data is available. Models like this are particularly suited for scenario studies. ECOMOD is a generic ecohydrological model that can be adapted and calibrated for other ecohydrological systems.</p>
Gebiedsdekkende basisinformatie voor het regionale waterbeheer in het waterschap Rijn en IJssel; programmeringsstudie
Finke, P.A. ; Bierkens, M.F.P. ; Droesen, W. ; Stolp, J. - \ 1996
Wageningen [etc.] : DLO-Staring Centrum [etc.] - 86
toepassingen - capaciteit - hydrologie - kaarten - methodologie - bodemkarteringen - theorie - waterbeheer - watervoorraden - nederland - betuwe - raden - gelderland - waterschappen - applications - capacity - hydrology - maps - methodology - soil surveys - theory - water management - water resources - netherlands - boards - polder boards
Voor het waterschap Rijn en IJssel is de gegevensbehoefte voor het regionaal waterbeheer onderzocht. De gegevensbehoeften van verschillende instrumenten zijn vergeleken, waarna variabelen geodentificeerd zijn die bij vrijwel alle instrumenten nodig zijn (het basispakket). Ook zijn twee uitbreidingspakketten gedefinieerd. Daarnaast zijn opties voor de gewenste ruimtelijke dichtheid van gegevensverzameling uitgewerkt. Combinaties van variabelenpakket en ruimtelijke dichtheid zijn geanalyseerd op kostendoorlooptijd en prioriteiten. De beste optie is verzameling van bodemgegevens en actualisatie van grondwatertrappen op een schaal van 1 : 50 000, alsmede het aanmaken van een gedetailleerd digitaal hoogtemodel.
Formalisation of ecohydrological expert knowledge applying fuzzy techniques.
Droesen, W.J. - \ 1996
Ecological Modelling 85 (1996). - ISSN 0304-3800 - p. 75 - 81.
Een strategische aanpak van milieuvoorlichting.
Meegeren, P. van; Droesen, F. - \ 1996
In: Handboek Milieucommunicatie. 7e aanvulling / Groen, M.,
Spatio-temporal modelling of the vegetation structure in the Amsterdam Waterworks Dunes using digital false colour orthophotos.
Droesen, W.J. ; Til, M. van; Assendorp, D. - \ 1995
EARSeL Advances in Remote Sensing 4 (1995). - ISSN 1017-4613 - p. 106 - 114.
Spatial modelling and monitoring in the Amsterdam Waterworks Dunes.
Droesen, W.J. - \ 1994
In: Proc. EARSeL Workshop Remote sensing and GIS for coastal zone management. Delft (1994) 104
Oecoydrologisch onderzoek Luchterduinen.
Kamps, P.T.W.J. ; Olsthoorn, T.N. ; Droesen, W.J. - \ 1993
In: Gebruik van GIS bij grondwatermodellering, CHO-TNO, Rapport no. 32 - p. 61 - 74.
Groundwater modelling using GIS at the Amsterdam water supply.
Olsthoorn, T.N. ; Kamps, P.T.W.J. ; Droesen, W.J. - \ 1993
In: Application of geographic information systems in hydrology and water resources management, K. Kovar, H.P. Nachtnebel (eds.). IAHS Publ. No. 211 - p. 665 - 674.
Application of fuzzy sets in ecohydrological expert modelling.
Droesen, W.J. ; Geelen, L.H.W.T. - \ 1993
In: Application of geographic information systems in hydrology and water resources management, K. Kovar, H.P. Nachtnebel (eds.). IAHS Publ. No. 211 - p. 3 - 12.
Variantie-analyse van bodemvocht met reflectie- en stralingstemperatuurmetingen voor het proefgebied Ulvenhout - Galder
Droesen, W.J. - \ 1991
Wageningen : Staring Centrum (Rapport / Staring Centrum 130) - 47
toepassingen - landgebruik - bedrijfsvoering - remote sensing - plattelandsontwikkeling - plattelandsplanning - grondanalyse - bodemwater - bodemwatergehalte - nederland - noord-brabant - applications - land use - management - rural development - rural planning - soil analysis - soil water - soil water content - netherlands
Milieuvoorlichting en strategische besluitvorming.
Droesen, F.M. ; Meegeren, P. van - \ 1991
In: Milieuvoorlichting en educatie / Cörvers, R.J.M., Heerlen : Open Universiteit - p. 43 - 73.
Toepassing van remote sensing in de landinrichtingspraktijk : eindrapport Ulvenhout - Galder
Droesen, W.J. ; Jaarsma, M.N. - \ 1990
Wageningen : Staring Centrum (Rapport / Staring Centrum 48) - 92
toepassingen - landgebruik - bedrijfsvoering - cartografie - remote sensing - plattelandsontwikkeling - plattelandsplanning - nederland - noord-brabant - thematische cartografie - applications - land use - management - mapping - rural development - rural planning - netherlands - thematic mapping
MAESTRO 89 ground data collection Horsterwold/Speulderbos/Flevoland (NL).
Droesen, W.J. ; Hoekman, D.H. ; Leeuwen, H.J.C. van; Sanden, J.J. van der; Bouman, B.A.M. ; Uenk, D. ; Vissers, M.A.M. ; Lemoine, G.G. - \ 1990
Unknown Publisher - 59 p.
Toepassingsmogelijkheden van remote sensing in de voorbereidingsfase van een landinrichtingsproject
Droesen, W.J. ; Lieshout, A.M. van - \ 1988
Wageningen : ICW (Nota / Instituut voor Cultuurtechniek en Waterhuishouding 1832) - 89
toepassingen - ruilverkaveling - landgebruik - bedrijfsvoering - ruimtelijke ordening - remote sensing - plattelandsontwikkeling - plattelandsplanning - bodemwater - aanwendingen - applications - land consolidation - land use - management - physical planning - rural development - rural planning - soil water - uses
Natuur- en milieu-educatie; onderzoek en praktijk.
Droesen, F. ; Woerkum, C.M.J. van - \ 1986
Unknown Publisher - 86 p.
De gemeentegronden in Noord-Brabant en Limburg en hunne ontginning : eene geschied- en landhuishoudkundige studie
Droesen, W.J. - \ 1927
University. Promotor(en): W.C. Mees R. Azn. - Roermond : Romen - 221
grondeigendom - heidegebieden - ontginning - geschiedenis - nederland - historische geografie - limburg - noord-brabant - land ownership - heathlands - reclamation - history - netherlands - historical geography
In olden times the diluvial sands of the southern Netherlands around the village nucleus formed widespread heaths, fens and bogs. On them the farmers had rights of grazing, and of digging peat and turf. In Saxon areas in the eastern Netherlands these lands became common property (marches or commons, Du. marken), while in the south, under the influence of French law, the land became municipal property.

Over the centuries they were reclaimed on a small scale; new settlements and villages grew up.

From the beginning of the 19th century the government encouraged reclamation and many thousands of hectares were sold, chiefly for forestation.

In 1856, North Brabant had about 100,000 ha and Limburg about half as much municipal waste land; figures in 1923 were 33,000 and 12,000 ha.

Artificial manures, credit (Raiffeisenbanks) and education allowed the establishment of farms on sands at the end of the 19th century. The farmers bought or rented areas of waste to enlarge their farms or to establish entirely new farms. This was later encouraged by cheap credit from the government and through reclamation by the unemployed. Large-scale reclaimers preferred areas of marsh and fen.

The advantages and disadvantages of these forms of reclamation, and of sale or renting out by the municipality were considered.

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