W.P.A. van Deursen

• Senior Integrated Water Resources Expert at Carthago Consultancy, Rotterdam, The Netherlands

A very early article on an alternative approach to removing pits from digital elevation models that was implemented in the LandMapR software as early as 1994. This article was submitted to, and accepted by PERS in 2002 but the first author never followed up with final publication.

a b s t r a c t Exploring adaptation pathways is an emerging approach for supporting decision making under uncertain changing conditions. An adaptation pathway is a sequence of policy actions to reach specified objectives. To develop adaptation pathways, interactions between environment and policy response need to be analysed over time for an ensem...

Door het project herinrichting Renkums Beekdal zijn de bedrijven van het bedrijventerrein Beukenlaan verplaatst naar andere bedrijfslocaties. Het vertrek van Vredestein was cruciaal voor het opheffen van het hele terrein. Op de Beukenlaan kon zo ruimte worden gemaakt voor natuurherstel en de realisatie van de Ecologische Hoofdstructuur. De uitvoeri...

Exploring adaptation pathways into an uncertain future can support decisionmaking in achieving sustainable water management in a changing environment. Our objective is to develop and test a method to identify such pathways by including dynamics from natural variability and the interaction between the water system and society. Present planning studi...

Using the systems approach framework (SAF), a coupled model suite was developed for simulating land-use decision making in response to nutrient abatement costs and water and nutrient fluxes in the hydrological network of the Scheldt River, and nutrient fluxes in the estuary and adjacent coastal sea. The purpose was to assess the efficiency of diffe...

De Programmatische Aanpak Stikstof (PAS), onderdeel van Natura 2000, is economisch voordelig voor ons land. Van 2013 tot 2020 zijn de economische baten zo'n 100-200 mln. euro/jaar hoger dan de kosten. De baten van de PAS voor de sectoren landbouw, industrie en verkeer en vervoer bedragen in die periode naar schatting 200 tot 300 mln. euro/jaar, ter...

Development of sustainable water management strategies involves identifi cation of vulnerability and adaptation possibilities, followed by an effect analysis of these adaptation strategies under different possible futures. Recent scenario studies on water management were mainly ‘what-if’ assessments in one or two future situations. The future is, h...

Duurzame Delta: een serieus spel over de toekomst van het waterbeheer We zijn aanbeland in het jaar 2039. Weer is de polder bij Waasstad overstroomd. Weer is de materiële schade groot en weer zijn slachtoffers te betreuren. Het publiek schreeuwt om actie. Toch kunnen de twee partijen het beleidsmatig niet eens worden. 'Fris en groen' houdt vast aan...

An important step in the procedure of building an environmental model is the transformation of a conceptual model into a numerical simulation. To simplify model construction a framework is required that relieves the model developer from software engineering concerns. In addition, as the demand for a holistic understanding of environmental systems i...

Recent scenario studies on water management focus on one or two projection years and the effects on the water system and functions. The future is however more complex and dynamic. Therefore, we analyse transient scenarios in order to evaluate the performance of water management strategies. Current available simulation tools are not suitable for thi...

A spatial decision support system (AFFOREST-sDSS) has been built to address ‘Where’, ‘How’, ‘How long’ and ‘What if’ questions related to the environmental performance (EP) of afforestation of agricultural land in north-western Europe at two spatial resolutions. EP is defined in terms of carbon (C) sequestration in biomass and soil, nitrate losses...

In this study observed precipitation, temperature, and discharge records from the Meuse basin for the period 1911–2003 are analysed. The primary aim is to establish which meteorological conditions generate (critical) low-flows of the Meuse. This is achieved by examining the relationships between observed seasonal precipitation and temperature anoma...

Simulations with a hydrological model for the river Rhine for the present (1960?1989) and a projected future (2070?2099) climate are discussed. The hydrological model (RhineFlow) is driven by meteorological data from a 90-years (ensemble of three 30-years) simulation with the HadRM3H regional climate model for both present-day and future climate (A...

Eutrophication largely results from deposition of atmospheric N. The emission of N mainly originates from agriculture (NH3), traffic, power plants and industry (NOx). The most important ammonia source is emission from animal manure. The extent of this emission depends on manure composition and meteorological conditions. After N is emitted (either a...

A forest/tree model has been developed of which the main growth processes are based on the CENW model. The model links the flows of carbon (C)), energy, nutrients and water in trees and soil organic matter. Modelled tree growth depends on physiological plant factors, the size of plant pools, such as foliage mass, environmental factors, such as temp...

Existing complex mechanistic models require too many input data, which are generally unavailable for application at a regional scale. For the development of a simplified soil model, however, we used existing complex models to start with. This soil model includes all relevant processes in order to simulate the temporal trajectory of carbon (C) seque...

Afforestation objectives vary from one country to another and even within countries. Apart from the objectives, the specific conditions from a biophysical, environmental and socio-economic point of view should always be considered throughout the entire afforestation process, from policy decisions through location of the new forest, establishment an...

This chapter describes the development of the METAFORE metamodel for the AFFOREST project, focusing on aspects that are important in defining the role of the metamodel in the entire system. Two modes are distinguished: one in which the METAFORE metamodel operates in a batch mode for generating the AFFOREST-sDSS tables for decision support, and anot...

Op basis van de stappen van een maatschappelijke kosten-batenanalyse is een Quick Scan van kosten en sociaal-economische gevolgen van Natura 2000 uitgevoerd. De maatregelen om Natura 2000 doelen te kunnen bereiken zijn aangeleverd door KIWA, LNV en Rijkswaterstaat. Van deze maatregelen is vastgesteld of ze additioneel zijn en welke kosten ermee sam...

Water management is surrounded by uncertainties. Water management thus has to answer the question: given the uncertainties, what is the best management strategy? This paper describes the application of the perspectives method on water management in the Rhine and Meuse basins. In the perspectives method, a structured framework to analyse water manag...

The concept and structure of the Spatial Decision Support System AFFOREST sDSS dealing with environmental performance (EP) of afforestation on agricultural land in northwestern Europe, is presented. EP is defined in terms of three environmental impact categories: (1) carbon sequestration (2) groundwater recharge and (3) nitrate leaching. The core o...

Flood management of the Rhine and Meuse is surrounded by major uncertainties. The central question is then: given the uncertainties, what is the best management strategy? Moreover, flood management cannot be considered independently from other river functions such as nature, agriculture, inland navigation and landscape values. This raises the need...

Climate change scenarios based on integrations of the Hadley Centre regional climate model HadRM2 are used to determine the change in the flow regime of the river Rhine by the end of the 21st century. Two scenarios are formulated: Scenario 1 accounting for the temperature increase (4.8degreesC on average over the basin) and changes in the mean prec...

The river Rhine fulfils important socio-economic and environmental functions for the riparian states in its 185,000 km2 large basin. Even under present-day conditions, the demands for flood protection, inland navigation, ecology, hydropower, water availability for agriculture, industry and drinking water are high. Climate change is expected to enha...

Heeft de verwachte klimaatverandering invloed op de frequentie en omvang van laagwater in de zomer in de Maas. Modelstudies op grond van klimaatscenario's en analyse van historische data m.b.t. neerslag en waterafvoer tonen aan dat er, met de huidige behoefte aan Maaswater, een grote kans is dat aanzienlijke economische schade ontstaat als gevolg v...

Two series of smog chamber experiments have been conducted to determine the par- ticulate yield from toluene photo oxidation and to investigate the dependence of the yield on experimental factors. Toluene was oxidized by HO radicals in the presence of NO by irradiating mixtures of toluene/isopropylnitrite/NO with UV light and experiments were done...

This study describes historical observations and future estimates of the discharge regime of the river Meuse, with reference to climate change. It specially deals with low flows and integrates results obtained from analyses of observed records and simulations performed with hydrological models.

Although many geographical information systems (GISs) are very advanced in data processing and display, current GIS are not capable of physically based modelling. Especially, simulating transport of water and pollutants through landscapes is a problem in a GIS environment. A number of specific routing methods are needed in a GIS for hydrologic mode...

Although many geographical information systems (GISs) are very advanced in data processing and display, current GIS are not capable of physically based modelling. Especially, simulating transport of water and pollutants through landscapes is a problem in a GIS environment. A number of specific routing methods are needed in a GIS for hydrologic mode...

City planning agencies in developing countries lack important information on the generally rapid urban development which is taking place. Remote Sensing is a promising technique which provides that much needed information. A time series of four SPOT‐XS images of Ouagadougou in Burkina Faso is analyzed to assess the usefulness of SPOT imagery for ur...

This paper describes the development of 'OntwerpGIS', a map sketching tool to be used in interactive and participatory planning sessions. The sessions are characterised by the fact that the participants are stakeholders in the planning process, but these participants are not necessarily experts in GIS concepts and in GIS functionality. The paper de...

A water balance model, called RHINEFLOW, has been developed, to investigate month to month changes in the water balance compartments in the Rhine basin. The model is based on a Geographical Information System (GIS). RHINEFLOW is designed to study the sensitivity of the discharge of the River Rhine to a climatic change. The model development is part...

A method is proposed to estimate the classification accuracy of low-resolution images by using high-resolution images in place of ground truth information. For that reason, low-resolution pixels have been simulated by degrading high-resolution images using different multi-resolution techniques. We carried out a statistical analysis, resulting in tw...

For some time vegetation scientists have used simulation models to describe ecological relations and processes. These models are mostly used to gain insight into the functioning of plant species, such as growth performance and competitive ability tinder different conditions. However, most plant species have a mobile stage during their life cycle, w...

An integrated, executable mathematical modelling language for environmental and ecological applications has been developed to create and run Dynamic Models in a GIS. The modelling language is embedded in the GIS, providing the ability to model complex space-time systems free from the technical burdens of database management and algorithm optimizati...

An integrated, executable mathematical modelling language for environmental and ecological applications has been developed to create and run Dynamic Models in a GIS. The modelling language is embedded in the GIS, providing the ability to model complex space-time systems free from the technical burdens of database management and algorithm optimizati...

A modelling language is presented to ran dynamic models in a GIS environment. The focus of the language is on environmental applications. The approach taken was to design and build a GIS which includes a modelling language for the formulation of the dynamic behaviour of environmental systems. The spatial modelling language allows for a component-ba...

Using simulation models on terrestrial carbon cycling is an important way to get sufficient insight into impacts of climate change. Remote Sensing (RS) techniques have been used to develop an operational method to derive Net Primary Production (NPP) data for European ecosystems. The method has been developed on the concept of finding so-called fing...

The model is built with the PC RASTER package, a set of utilities for hydrological and geomorphological modelling that can be linked to a raster GIS. With these utilities water balances can be modelled on each of the cells of the raster system. A geomorphologically based routing model allows the surface water computed from the water balance to drai...

This paper uses fuzzy classification to determine land suitability and compares the results obtained with conventional Boolean methods. The methods are illustrated using data from the Alberta Agricultural Department experimental farm at Lacombe in Alberta, Canada. Data on site elevation and soil chemical and physical properties measured at 154 soil...

Models of spatial processes such as the movement of groundwater, the erosion of soil or the colonization of bare surfaces by organisms have been developed by specialists whose primary aim is often to represent a physical process as accurately as possible. The success of the process models is often directly proportional to the amount of data availab...

This paper evaluates the users of environmental models in GIS. It argues that different user groups might be distinguished, each with different needs and perspectives. This paper gives a classification of the intended user groups and describes some characteristics of them. As current generations of GIS focus on only a part of these intended user gr...

De waterbeheerders in Nederland bereiden zich sinds het einde van de jaren negentig serieus voor op de gevolgen van klimaatverandering. Tot op heden gebeurde dit op basis van klimaatscenario's die in het kader van Waterbeheer 21ste eeuw (WB21) zijn gepresenteerd. De nieuwe KNMI06-scenario's geven de laatste inzichten in de gevolgen van klimaatveran...