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IssuesenvironnementLandLibrary Resource
There are 6, 240 content items of different types and languages related to environnement on the Land Portal.

environnement

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Displaying 2113 - 2124 of 3179

Democracy and deforestation. The politics of protecting the forests

Décembre, 2001
Philippines
Asie orientale
Océanie

How can the process of tropical deforestation be controlled? We now know a good deal about the causes of deforestation but not its control. Research from the University of Leeds in Thailand and the Philippines fills this gap, showing that changes in the domestic political scene explain how deforestation processes have been controlled in the two countries. Environmental constraints and increases in agricultural productivity can curb the demand for farmland to some extent.

Kazakh nomads, rangeland policy, and the environment in Altay: insights from new range ecology

Décembre, 2000

This paper considers the degree of environmental variability in an extensive pastoral area of Altay, northern Xinjiang (China); assesses the extent to which institutional arrangements are able to accommodate environmental variability, and discusses the implications of this for rangeland policy.The article finds that:there is some inter-temporal variation in rangeland productivity (in pasture zones), suggesting some applicability of new range ecologythere is less environmntal variation in summer pasture, suggesting that the concepts and tools of conventional rangeland management might be mor

Overestimating land degradation, underestimating farmers in the Sahel

Décembre, 2000
Burkina Faso
Afrique sub-saharienne

This paper examines the evidence for land degradation in Burkina Faso, and argues that local farming practices are not as unsustainable and environmentally destructive as many reports suggest.Main findings of the study include:there is little evidence of widespread degradation of crop and fallow land in Burkina Faso; the low external input practices used by West African farmers are not leading to region wide land degradation processesa major reason for the overestimation of land degradation has been the underestimation of the abilities of local farmersthere is much more to soil and water co

Nepal: breaking new ground: leasehold forestry in Nepal: hills leasehold forestry and forage development project

Décembre, 2002
Népal
Asie méridionale

This document presents the results of an evaluation of an IFAD project aimed at preventing land degradation in Nepal. The project is based on leasehold forestry, an innovative approach introduced by IFAD in the early 1990s. It works by providing forty-year leases to groups of households and giving them user rights over plots of degraded forest land.

Towards integrated natural resources management (INRM) in dry areas subject to land degradation: the example of the Khanasser valley in Syria

Décembre, 2007
République arabe syrienne
Asie occidentale
Afrique septentrionale

Using the Khanasser Valley in Syria as an example, this paper looks at Integrated Natural Resource management (INRM) as an approach to tackle land degradation. The authors argue that INRM is a better approach because of its comprehensive nature and simplification of the inherently complex socio-ecological systems. One of the greatest challenges currently facing humankind is the alleviation of poverty while maintaining life support systems. Many people are dependent on natural resources that are often unsustainably used by poor people themselves or by other powerful stakeholders.

Climate variability and maize yield in South Africa: results from GME and MELE methods

Décembre, 2008
Afrique du Sud

This paper investigates the impact of climate variability on maize yield in the Limpopo Basin of South Africa using the Generalized Maximum Entropy (GME) estimator and Maximum Entropy Leuven Estimator (MELE). Maize constitutes about 70 percent of grain production and covers about 60 percent of the cropping area in South Africa. It is a summer crop, mostly grown in semiarid regions of the country, and is highly susceptible to changes in precipitation and temperature.

Rising temperatures, rising tension: climate change and the risk of violent conflict in the Middle East

Décembre, 2008
République arabe syrienne
Jordanie
Israël
Liban
Palestine
Asie occidentale
Afrique septentrionale

Climate models are predicting a hotter, drier and less predictable climate in the Middle East, a region already considered the world's most water-scarce and where, in many places, demand for water already outstrips supply. This report addresses the links between climate change, peace and conflict.

Carbon sequestration in agricultural soils

Janvier, 2012
Asie orientale
Afrique sub-saharienne
Océanie
Asie méridionale
Amérique latine et Caraïbes

This report aims to improve the knowledge base for scaling-up investments in land management technologies that sequester soil carbon for increased productivity under changing climate conditions. The report presents the following key messages.

The Economic Valuation of Tropical Forest Land Use Options: A Manual for Researchers

Décembre, 1997

Manual for researchers in Southeast Asia involved in the economic evaluation of tropical forest land use options. It was developed initially to serve as an aid to Cambodian researchers in the execution of an EEPSEA-financed study of non-timber forest values in Ratanakiri Province, Cambodia. The aim of the manual is to provide non-specialists with a basic theoretical background to economic valuation of the environment and with a practical methodology for an economic evaluation of alternative tropical forest land uses.

Fuelwood Consumption and Forest Degradation: A Household Model for Domestic Energy Substitution in Rural India [Rajasthan]

Décembre, 1997

Paper examines domestic energy supply and demand in Northwest India. A household model is set up to analyse the links between forest scarcity and household energy consumption, focusing on the substitution of fuels from the forests and commons and the private domain. The model is estimated using recently collected data from villages bordering Sariska Tiger Reserve in Rajasthan, India. A novel maximum entropy approach is used for estimation.

Roads, lands, markets, and deforestation: a spatial model of land use in Belize

Décembre, 1994
Belize
Amérique latine et Caraïbes

Will intensifying the road network around market areas produce greater economic returns and less environmental damage than extending the road network into new areas?Rural roads promote economic development but also facilitate deforestation. To explore the trade-offs between development and environmental damage posed by road building, Chomitz and Gray develop and estimate a spatially explicit model of land use.