NDLI: Multispectral Remote Sensing Over Semi-arid Landscapes for Resource Management

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Multispectral Remote Sensing Over Semi-arid Landscapes for Resource Management

Content Provider	Scilit
Author	Ustin, Susan L. Costick, Larry A.
Copyright Year	2000
Description	Arid and semi-arid landscapes are fragile ecosystems, sensitive to degradation and desertification. Loss of productivity results from complex interactions between climate impacts and unsustainable land use practices. The United Nations Conference on Envi ronment and Development (UNCED, 1992) estimates 70% of all drylands, totaling about 3.6 B ha or 25% of the Earth's land surface, are affected by desertification. North America and Spain have the largest percentage of deteriorating arid lands, with 90% of arid lands in North America moderately to severely desertified (Dregne, 1986). Dregne (1986) identifies three processes that promote desertification: 1) deterioration of vegetation cover from overgrazing, wood cutting and burning; 2) wind and water erosion from improper land management; and 3) salinization from improper irrigation management. The U.S. National Research Council (1994) identified three criteria for defining rangeland health: soil stability and watershed function, integrity of nutrient cycles and energy flow, and presence of functioning recovery mechanisms. Land managers need new techniques to identify and map locations of environmental problems within their management units to develop effective plans for sustainability. Human activities create disturbances at all spatial scales, making it difficult to develop consistent management decisions, especially over the extended periods necessary to reverse environmental degradation. Book Name: Spatial Information for Land Use Management
Related Links	https://content.taylorfrancis.com/books/download?dac=C2004-0-07721-1&isbn=9780429182525&doi=10.1201/9781482283129-22&format=pdf
Ending Page	168
Page Count	16
Starting Page	153
DOI	10.1201/9781482283129-22
Language	English
Publisher	Informa UK Limited
Publisher Date	2000-11-17
Access Restriction	Open
Subject Keyword	Book Name: Spatial Information for Land Use Management Remote Sensing Desertification National Research Arid and Semi
Content Type	Text
Resource Type	Chapter

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