How to define desertification Chapter 12 of Agenda 21, as approved by the United Nations Conference on Environment and Development UNCEDdefines desertification as "land degradation in arid, semi-arid and dry subhumid areas resulting from various factors, including climatic variations and human activities". This definition is simplistic, as it does not express clearly the constant interaction between climatic factors and human activities - the latter often being decisive in triggering desertification processes. Nevertheless, it seems important to state that, in certain parts of the world, desertification processes land degradation operate in the absence of human activities, where such activities are negligible because of low population density. The natural recurring drought processes, which may be caused by global climatic changes that are difficult to evaluate, may lead to land degradation, thus endangering the peoples in and around those areas, or preventing future land use.
Water erosion and reduced soil conservation in semi-arid Burkina Faso negatively affects ecosystem services Source: MA Historically, dryland livelihoods have been based on a mixture of hunting, gathering, farming, and herding.
|Desertification: What are the major causes of desertification?||How will different future development paths influence desertification? Population growth and increased food demand are expected to drive the expansion and intensification of land cultivation in drylands.|
|The Battle Against Desertification—Why Canada Should Care - Water Canada||China Fighting desertification in China Beijing launched an ambitious plan a decade ago, but the desert continues to swallow up large tracts of green land.|
|Desertification - Wikipedia||Definitions[ edit ] Considerable controversy exists over the proper definition of the term "desertification" for which Helmut Geist has identified more than formal definitions. During most of these times, deserts have grown and shrunk independent of human activities.|
This mixture varied with time, place, and culture, since the harsh conditions forced people to be flexible in their use of the land. Population pressure, however, has led to the extension of cultivated lands in dryland areas.
In some cases this has caused desertification and conflicts between herders and farmers who claimed access to the same land. In other cases, when policy and market conditions were favorable, it led to positive interactions between the two groups. In some areas, the increase in cultivation has been driven by increased irrigation which has often been unsustainable.
Irrigation can cause environmental problems such as waterloggingsalinizationwater pollution, eutrophicationand excessive groundwater use. On the whole, irrigation has had a strong impact on inland waterscausing a decline in biodiversity and further desertification. Frequent and intensive fires can contribute to desertification when they affect natural vegetation.
However, limited controlled fires can play an important role in the management of dryland herding and farming systems, promoting nutrient cycling and forage quality.Desertification in China is a major problem for Beijing, as the country’s deserts are growing, threatening environmental, economic, and political stability.
The Green Wall of China Following the creation of the People’s Republic of China (PRC) in , the country embarked on . Drylands, people and land use term drylands.
Two of the most widely accepted definitions are those of FAO and the United Nations Convention to Combat Desertification (UNCCD, ). FAO has defined soils (FAO, ) (Figure 2). Important features of dryland soils for agricultural production are their water holding capacity and their. Desertification What exactly is desertification?
Unfortunately, there are many responses and many contradicting definitions. Some say that it is permanent, others say it is a reversible process. There are even debates on whether the definition should include human involvement or not.
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Search. What is China doing to prevent desertification of its land. Planting trees. What is not one of the reasons for India's recent economic success. REASONS ARE; Foreign investers, agricultural success, and foregone companies.
PICK. Rocky features of Southern Africa include plateaus and mountains, such as the Drakensberg range.
Southern Africa is the epicenter of Africas well-known reserves, which protect animal species such as lions, elephants, . Desertification Essay Examples. 11 total results. The Major Causes of Desertification of the Earth words. 1 page. An Introduction to the Process of Desertification.
7 pages. Desertification and Its Contribution to the Lack of Development of a Country 1, words. 3 pages. An Overview of Desertification. words. 1.