Grégoire Leclerc

Grégoire Leclerc
Cirad - La recherche agronomique pour le développement | CIRAD · Unité Propre de Recherche Gestion des Ressources Renouvelables et Environnement (GREEN)

PhD

About

71
Publications
7,863
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553
Citations
Additional affiliations
June 2003 - November 2011
Cheikh Anta Diop University, Dakar
Position
  • visiting scientist
January 1981 - January 1992
Université de Sherbrooke
Position
  • PhD Student

Publications

Publications (71)
Article
Full-text available
This Special Feature gathers the results of five research projects funded by the 7th Research Framework Program of the European Union and aims to identify successful cases of community-based management of environmental challenges in Latin America. The funding scheme, Research for the benefit of Civil Society Organizations, fostered innovative resea...
Article
During the first half of the 21st century, socioeconomic development is expected to contribute faster and to a greater extent to global water stress than climate change. Consequently, we aimed to identify conditions that can facilitate local adaptation planning for future water security, accounting for the socio-institutional context, developmental...
Research
Full-text available
Avances de investigación del proyecto FuturAgua
Technical Report
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FuturAgua es un proyecto de investigación que pretende fortalecer el conocimiento científico-técnico en diversas áreas relevantes para el manejo sostenible del agua. Además, pretende facilitar que la información sea comprendida y utilizada por los diferentes sectores de la sociedad guanacasteca. Sus investigaciones se pueden clasificar en dos tipos...
Technical Report
Full-text available
Primer informe de avances del proyecto Belmont Forum: FuturAgua
Article
Climate change adaptation is about risk management to secure water, food, fiber, timber and other means of livelihood. Although the management of climate risks is a long‐term undertaking, recent climate change trends underline the urgency for active measures in order to improve the resilience of people and landscapes to adverse effects of a changin...
Article
Full-text available
We introduce Fuzzy Cognitive Modelling (FCM) and provide step by step guidance and tips for using iModeler (both qualitative and quantitative approaches), the use of FCM in EcoAdapt Story and Simulation (S&S) approach based on Structured Decision Making, and briefly describe the FCM models being developed in the three study sites. This version corr...
Article
This technical note describes two methods for measuring surface roughness and deriving roughness parameters, the first using an inexpensive profilemeter and the second involving a chain and a caliper ruler. The derivation of roughness parameters from surface profiles is described in detail. An analysis conducted with parameters determined for 30 pr...
Article
Full-text available
EcoAdapt (www.ecoadapt.eu) is an ambitious, complex and demanding action-research project about water security in a context of climate change. The issues the project deals with are also complex and demanding. A central challenge is how to get the investigators, the project partner Model Forest local teams and the relevant local actors in the territ...
Experiment Findings
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Abstract: This document is about the methodology of social validation of the Climate Change Adaptation Plans and its implementation in the three Model Forests (MFs) of the EcoAdapt project. The first part of the paper presents the background and the work method. The second part deals with the specific advances and results of each of the three model...
Article
This study analyzes the spatial evolution of the port of Dakar over a little more than a century (1900-2009) and considers its linkages with political, economic and territorial issues since its inception. Spatial analysis was used to follow the transformation of the port area at a micro-local scale; it provides a few cues about how the port is link...
Article
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We review the literature to highlight criteria for analysing public participation GIS (PPGIS). The theories that have been used, developed or sketched out about PPGIS address the issue according to various entry points: communication and collective learning, negotiation and mediation, representations and cognitive processes, exclusion and politics...
Article
Full-text available
Transhumance in the Sahel have been described and mapped extensively because they represent an essential pillar for securing pastoral systems. However, very few quantifiable indicators exit to guide decision makers and policy makers for taking transhumance into account. Through a case study in the Senegalese Ferlo we propose novel indicators (spati...
Article
La population urbaine connait une croissance acceleree en Afrique, avec une augmentation encore plus importante du nombre de deplacements journaliers. D’une bonne connaissance de la mobilite dependra la planification et la mise en oeuvre d’infrastructures urbaines et de systemes de transport durables. Traditionnellement, les etudes sur la mobilite...
Article
Transhumance in the Sahel have been described and mapped extensively because they represent an essential pillar for securing pastoral systems. However, very few quantifiable indicators exit to guide decision makers and policy makers for taking transhumance into account. Through a case study in the Senegalese Ferlo we propose novel indicators (spati...
Article
We present an experimental method for measuring low-energy (0–15 eV) electron transmission through bio-organic, solid, thin films at 300 K. This method is used to determine the energy of the first electronic transitions and the energy of the lowest conduction level of an electron in those solids. By measuring the density and thickness of the films...
Article
Full-text available
A partir d’une revue de littérature nous faisons ressortir des éléments d’analyse des systèmes d’information géographique pour la participation publique (SIGPP). Les théories qui ont été ébauchées ou mobilisées concernent la communication et l’apprentissage collectif, la négociation et la médiation, les représentations et les processus cognitifs, l...
Article
Full-text available
Available online: http://www.jle.com/fr/revues/agro_biotech/agr/e-docs/00/04/56/45/article.phtml La modélisation participative présente de fortes contraintes liées, d'une part, à l'expression et au partage de points de vue, et, d'autre part, à l'intelligibilité des modèles. Elle impose des simplifications et des arbitrages. Nous partons de l'hypot...
Article
The present state of the landscapes and territories in the Sahel is the result of interactions between climatic, economic, social and political factors which have been taking place for more than four decades. In the north of Senegal, the Ferlo geographical space is representative of cohabitation between sylvopastoral and agricultural production sys...
Article
This work is about bringing together different perceptions of poverty to improve the design of poverty alleviation policies. A case study in Honduras shows how locally derived poverty indicators, developed from village-level participatory appraisals of perceptions of poverty, can be extrapolated to country level using raw census data. The “well-b...
Article
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available online: http://www.jle.com/fr/revues/agro_biotech/agr/e-docs/00/04/56/44/article.phtml
Article
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Recent improvements in the capability of statistical or dynamic models to predict climate fluctuations several months in advance may be an opportunity to improve the management of climatic risk in rain-fed agriculture. The aim of this paper is to evaluate the potential benefits that seasonal climate predictions can bring to farmers in West Africa....
Article
Full-text available
L’état actuel des paysages et des territoires sahéliens est la résultante d’interactions entre facteurs écoclimatiques, socio-économiques et politiques, à l’oeuvre depuis plus de quatre décennies. Au nord du Sénégal, l’espace géographique du Ferlo est représentatif d’une cohabitation entre des systèmes de production agrosylvopastoraux dans laquelle...
Article
While decision makers in Africa are increasingly interested by the potential of geographic information systems (GIS), donors and development players are brought into thinking about the place of these tools in their programs and about improving the design and evaluation GIS projects for local and territorial development. This study addresses the iss...
Article
Full-text available
We describe an action-research project whose objective was to help stakeholders at different organisational levels achieve sustainable land management by developing mediation models and tools. We chose to test a specific approach called companion modelling in the framework of a multidisciplinary research partnership and a formal local partnership (...
Article
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This article was submitted without an abstract, please refer to the full-text PDF file.
Article
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This article was submitted without an abstract, please refer to the full-text PDF file.
Article
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How can scientists help institutions and local stakeholders be more involved in land use and territorial management processes? Decentralization of land use management is far from complete in Senegal and La Réunion Island. Despite exhaustive legislation, local populations remain little involved in the decisions that affect their land. This is partly...
Article
Full-text available
Decentralization movement engaged in a great number of African countries allow the transfer of important competences from the State towards the local communities, and in particular, concerning Senegal, as regards to natural resources management and land tenure. In such political and institutional contexts which privilege a widened participation of...
Article
Full-text available
Paying for water in the Ferlo. Pastoral strategies of community water management A reform under way in Senegal is privatizing the management of water drawn from the pastoral boreholes of the Ferlo. The pastoral communities for their part manage their natural resources, water and pastures, in an integrated way by providing for a range of principles...
Article
The Republic of Niger belongs to the group of countries at the bottom of every scale of classification of countries in terms of development, and at the top of the line in terms of food insecurity. The United Nation's Development Program (UNDP) ranked Niger as 171st out of 172 nations in its Human Development Index (HDI) in 2002. Biophysical and geo...
Article
A nyone who has managed to make it through this book, or indeed any significant part of it, must be pretty tired of learning about the many failures of conventional economics and of economic development to date, the remaining problems of the poor and of the environment, and the rather diffuse and perhaps insufficient biophysical tools that we bring...
Article
It is fascinating to find how little is known about poverty measurement and how unreliable poverty estimates are, after decades of massive investments in poverty-alleviation programs. It is as surprising to see that poverty is still extremely widespread and endemic in the world.1 It is perhaps this proportion of the population for which the green r...
Article
Introduction The objectives of development normally are to help the poor. But who are the poor, and how can we find where they live? How do we reach them in our development attempts? It is surprising to realize that these apparently simple questions have yet to be answered objectively even after billions of dollars have been invested in development...
Article
It seems imperative that we as individuals who care about the human condition and about nature create a new way to undertake developmental economics and perhaps economics in general. The reasons that this is so important have been reviewed in previous chapters. They include our dissatisfaction with the intellectual foundations of conventional econo...
Book
Making World Development Work is about economic development and its relation to population, environment and resource issues in less affluent countries. The essays presented here criticize the way most large development projects are designed and conducted and are written by professionals from a broad range of disciplines involved in current developm...
Book
Chapitre rédigé par le collectif ComMod regroupant 40 personnes. Son correspondant est François Bousquet (CIRAD, green)
Article
This article presents a method to study and correct radiometric distortions caused by topography in SAR images. The method is easy to implement and requires neither sophisticated software nor code-level programming. It also considers the case of a flat surface having an elevation different from the one for which calibration parameters were derived....
Chapter
Land use analysis, which involves the quantification, often over time, of natural areas and the areas of land used for agronomy and forestry, plus ecology, economics, and marketing, must be interdisciplinary, quantitative, and objective, while still representing accurately an extremely complex problem. Remote sensing (RS) can play an active role in...
Chapter
Climate and weather affect most human activity, and are especially important in cultures such as Costa Rica that depend heavily on agriculture. A study of climate is an essential component of understanding the biophysical basis for a region's economy, including the growth and productivity of agricultural plants and fruit trees, erosion, other forms...
Chapter
Investigators are turning to Geographical Information Systems (GlSs) in order to maintain information about the earth in a spatially referenced and organized manner, generate maps of landscapes as they exist or might become, manage natural resources, and make decisions for the future. Although a profound knowledge of the subject one is trying to mo...
Article
Full-text available
Executive Summary In October 1998, the Seeds of Hope project contributed to the production of 2,000 copies of the "Mitch Atlas", containing fundamental maps on population, land use, roads, rivers, topography, and soils. The Atlas was freely distributed to institutions for post-Hurricane Mitch emergency response and reconstruction. Two years later,...
Book
Until recently, the phenomenal economic development of the Asian tigers, Chile, and Malaysia, as well as the sustained economic growth of the United States, painted a very desirable and optimistic picture of free markets, fiscal responsibility, and, more generally, the entire dogma of neoclassical economics. As of the fall of 1998, however, the eco...
Chapter
Thin condensed films of rare-gas atoms (Ar, Kr, Xe), grown on a Pt(111) crystal, have been exposed to monochromatic low-energy electrons (E = 5 –; 25 eV, ΔE = 60 meV). Desorbed metastable atoms are abundant for Ar films, and several desorption components are identified based on the information on flight time and desorption angle. With Kr and Xe, a...
Article
Metastable-atom desorption and uv luminescence from thin films of Kr and Xe on Pt(111) stimulated by impact of monochromatic low-energy electrons (E=5-25 eV, DeltaE=60 meV) have been studied. For either pure rare-gas film, the excitation function of the total luminescence signal shows two broad peaks that are presumably related to the interplay bet...
Article
Full-text available
Time-resolved desorption patterns of metastable argon atoms have been obtained from thin Ar(111) films condensed on Pt(111) at 15 K. The desorption is stimulated by monochromatic electrons with a fixed energy of 14.5 eV. Combining the information on time-of-flight and angular distributions, five distinct metastable-atom components can be identified...
Article
Possible causes of the spatial distortion encountered when using pierced resistive anodes for position‐sensitive detection are discussed. An accurate map of the spatial distortion around a circular hole in a resistive anode is presented, which shows that the hole’s effect is felt at distances up to three times its radius. The effect of load conditi...
Article
L'appareil que nous presentons ici a ete mis au point pour permettre d'accumuler des images numeriques, resolues dans le temps, de la desorption par stimulation electronique (DSE) d'ions positifs et negatifs, de photons et de neutres metastables, tout en conservant des capacites de base de diffraction d'electrons lents (DEL) et de transmission d'el...
Article
Use of a spreadsheet program to solve the Laplace equation and calculate charged‐particle trajectories in geometrically complex electrostatic fields is described. The technique is applied to the development of a new electron‐scattering apparatus.
Article
We have investigated the electron stimulated desorption of neutral metastable atoms from solid Argon condensed on a Pt (111) surface at 14 K. With time of flight techniques, we have observed the emission of photons and the ejection of two groups of metastable atoms, of very low kinetic energy (<300 meV) and narrow angular distribution (15° width at...
Article
The authors describe a low-energy electron impact experiment, performed on thin n-hexane films held at 80 K, that was designed for the measurement of the effective dissociation cross section in the energy range 0.5-31 eV. The onset of dissociation was found at approx. 3.6 eV incident electron energy, implicating the excitation of a low-lying triple...
Article
We describe an experimental method for measuring the transmission of slow (<10 eV) electrons through thin solid bioorganic films at 300 K, with application to the amino acid tryptophan. The data were analyzed with the aid of a simulation model of electron transport in condensed media, which allowed, for the first time, an estimation of low-energy e...
Article
Full-text available
We present preliminary results obtained from studying RADARSAT imagery to monitor land use at two coastal sites in Central America, one in Pacific northern Nicaragua, the other in Pacific southern Costa Rica. The scope of this paper is to compare the ability of different imaging modes to evidence land use features in the mangroves and their surroun...
Article
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Este artículo presenta los resultados del uso imágenes de RADARSAT-1 y de JERS-1 para desarrollar un mapa de clases generales de vegetación en un municipio de los llanos orientales de Colombia. El mapa resultante presenta 5 clases que son agua, sabanas nativas manejadas por quema, pastos introducidos o cultivos, vegetación arbustiva y bosques. Esta...
Article
Full-text available
Decentralization of land use governance creates new challenges for participatory approaches, including the involvement of highly diverse participants and the search for coherence among multiple regulations. In France, the 2000 law of Urban Reform and Solidarity ("Solidarité et Renouvellement Urbain") provides a legal framework to land use decentral...
Article
Full-text available
Unit-level data (individual, household or farm) from the 1988 population and 1993 agricultural censuses of Honduras have been integrated into a Geographic Information System (GIS). We showed how poverty indices can be computed for different scales of aggregation from village to country, and how they compare to other published figures. Indicators de...
Article
Full-text available
JIRCAS); Pierre Maurel (CEMAGREF); Cécile Adell (ENSAM); Benoit Mertens (CIFOR); Khadija Ait Alayane (Geodimensions) 1 3. Highlights ??A multi-collaborative approach was developed to link participatory planning and image processing that includes the definition of meaningful indicators. ?? A method was developed and applied to derive land use classi...

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Projects

Projects (6)
Archived project
EcoAdapt is an action-research initiative working with three Latin American provinces to influence water management processes that contribute to local development and reduce vulnerability of human populations to climate change through capacity building, knowledge sharing, conflict prevention and mitigation, and promoting joint work with local and national stakeholders. It is financed by the 7th Framework Programme (FP7) for Research and Development of the European Commission.
Archived project