نتایج جستجو برای: global hectares

تعداد نتایج: 450171  

Journal: : 2023

Purpose. The differences in 20-year tree cover dynamics were analysed for the three experimental strata, which correspond to former administrative districts and are located along landscape socio-ecological gradient on territory of Chernivtsi region. Methods. System analysis, statistical geospatial database Global Forest Watch service used. Results. Three strata have been identified region inter...

Yaser Hosini

Use of new techniques to evaluate irrigation areas can enhance water use efficiency in agriculture. In this study, the fuzzy analytic hierarchy Process (FAHP) was used to qualitative land suitability for sprinkler irrigation and was compared with the parametric method. Evaluation based on parametric method showed that an area of about 1597.83 hectares (31%) of the lands was highly suitable (S1)...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1391

abstract global financial crisis has created too many problems in relations among governments. among these problems, the issue of global monetary management, more than every time in the past four decades, has been moved in the center of international economic attentions. a problem which is specially known with the monetary hostility between united states and public republic of china. where ar...

unprincipled changes in land use are major challenges for many countries and different regions of the world, which in turn have devastating effects on natural resources, Therefore, the study of land-use changes has a fundamental and important role for environmental studies. The purpose of this study is to detect and predicting of land use/ land cover (LULC) changes in Darab plain through the Ma...

2016
Xihua Wang Guangxin Zhang Jun Xu Athanasios Loukas

Joint assessment of groundwater-surface water resources can help develop sustainable regional water management plans for intensive agriculture. In this study, we estimated allowable groundwater and surface water quantities using a water balance model, WetSpass-GMS, for the Sanjiang Plain (10.9 × 104 km2), one of the most important grain production bases in China. We then applied a double contro...

Journal: :Remote Sensing 2010
Prasad S. Thenkabail Munir A. Hanjra Venkateswarlu Dheeravath Muralikrishna Gumma

This paper presents an exhaustive review of global croplands and their water use, for the end of last millennium, mapped using remote sensing and non-remote sensing approaches by world’s leading researchers on the subject. A comparison at country scale of global cropland area estimated by these studies had a high R-value of 0.89–0.94. The global cropland area estimates amongst different studies...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
R A Mittermeier C G Mittermeier T M Brooks J D Pilgrim W R Konstant G A B da Fonseca C Kormos

Human pressure threatens many species and ecosystems, so conservation efforts necessarily prioritize saving them. However, conservation should clearly be proactive wherever possible. In this article, we assess the biodiversity conservation value, and specifically the irreplaceability in terms of species endemism, of those of the planet's ecosystems that remain intact. We find that 24 wilderness...

Journal: :Annals of the New York Academy of Sciences 2011
Emily S Bernhardt Margaret A Palmer

Southern Appalachian forests are recognized as a biodiversity hot spot of global significance, particularly for endemic aquatic salamanders and mussels. The dominant driver of land-cover and land-use change in this region is surface mining, with an ever-increasing proportion occurring as mountaintop mining with valley fill operations (MTVF). In MTVF, seams of coal are exposed using explosives, ...

Journal: :Current Biology 2010
Nigel Williams

Monsanto, the world's largest seed producer, which is the focus of European opposition to genetically modified crops still banned from commercial planting throughout the European Union, has flagged up a new conventional variety of broccoli set to win awards at a major European show this month. The company is hoping that the new broccoli, Bellaverde, will sway the judges at the Fruit Logistica s...

2013
William E. Rees Mathis Wackernagel

In their Perspective in this issue of PLOS Biology, Blomqvist et al. [1] set out to demonstrate that ‘‘Ecological Footprint measurements, as currently constructed, are so misleading as to preclude their use in any serious science or policy context.’’ Should the reader be confident in this assessment or are Ecological Footprint methods and results adequate to guide sustainability policy? Their P...

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