نتایج جستجو برای: land vulnerability

تعداد نتایج: 159243  

2013
Olga Wilhelmi Kenneth Hubbard Donald A. Wilhite Olga V. Wilhelmi Kenneth G. Hubbard

Agricultural drought is the leading cause for crop failure throughout the world. In the USA, significant impacts of recent droughts on agricultural production indicate the continuing vulnerability of the country to drought. This paper presents a methodology for spatial representation of the agroclimatic component of agricultural drought vulnerability. This methodology was developed as a part of...

2010
Evan D. G. Fraser Andrew J. Dougill Klaus Hubacek Claire H. Quinn Jan Sendzimir Mette Termansen

Over 40% of the earth’s land surface are drylands that are home to approximately 2.5 billion people. Livelihood sustainability in drylands is threatened by a complex and interrelated range of social, economic, political, and environmental changes that present significant challenges to researchers, policy makers, and, above all, rural land users. Dynamic ecological and environmental change model...

2014
Mohsen Ahmadi José Vicente López-Bao Mohammad Kaboli Clinton N. Jenkins

As human populations expand, there is increasing demand and pressure for land. Under this scenario, behavioural flexibility and adaptation become important processes leading to the persistence of large carnivores in human-dominated landscapes such as agroecosystems. A growing interest has recently emerged on the outcome of the coexistence between wolves and humans in these systems. It has been ...

2010
José I. Barredo Guy Engelen

It is generally accepted that flood risk has been increasing in Europe in the last decades. Accordingly, it becomes a priority to better understand its drivers and mechanisms. Flood risk is evaluated on the basis of three factors: hazard, exposure and vulnerability. If one of these factors increases, then so does the risk. Land use change models used for ex-ante assessment of spatial trends pro...

Journal: :Remote Sensing 2017
Emily J. Sturdivant Erika E. Lentz E. Robert Thieler Amy S. Farris Kathryn M. Weber David P. Remsen Simon Miner Rachel E. Henderson

The vulnerability of coastal systems to hazards such as storms and sea-level rise is typically characterized using a combination of ground and manned airborne systems that have limited spatial or temporal scales. Structure-from-motion (SfM) photogrammetry applied to imagery acquired by unmanned aerial systems (UAS) offers a rapid and inexpensive means to produce high-resolution topographic and ...

2013
Crystal L. Raymond David L. Peterson Regina M. Rochefort

The U.S. Forest Service (USFS) and National Park Service (NPS) have highlighted climate change as an agency priority and issued direction to administrative units for responding to climate change. In response, the USFS and NPS initiated the North Cascadia Adaptation Partnership (NCAP) in 2010. The goals of the NCAP were to build an inclusive partnership, increase climate change awareness, assess...

2011
James L. Sadd Manuel Pastor Rachel Morello-Frosch Justin Scoggins Bill Jesdale

Regulatory agencies, including the U.S. Environmental Protection Agency (US EPA) and state authorities like the California Air Resources Board (CARB), have sought to address the concerns of environmental justice (EJ) advocates who argue that chemical-by-chemical and source-specific assessments of potential health risks of environmental hazards do not reflect the multiple environmental and socia...

2015
A J Tatem B Tan D Sulla-Menashe S J Graves

East–Southeast Asia is currently one of the fastest urbanizing regions in theworld, with countries such as China climbing from20 to 50%urbanized in just a few decades. By 2050, these countries are projected to add 1 billion people, with 90%of that growth occurring in cities. This population shift parallels an equally astounding amount of built-up land expansion.However, spatially-and temporally...

Journal: :The Science of the total environment 2014
Todd M Preston Tara L Chesley-Preston Joanna N Thamke

Water (brine) co-produced with oil in the Williston Basin is some of the most saline in the nation. The Prairie Pothole Region (PPR), characterized by glacial sediments and numerous wetlands, covers the northern and eastern portion of the Williston Basin. Sheridan County, Montana, lies within the PPR and has a documented history of brine contamination. Surface water and shallow groundwater in t...

ژورنال: علوم آب و خاک 2014
سفیانیان, علیرضا , سلطانی, سعید , قاسمی نژاد, سعیده ,

Drought is a one of the most important natural disasters that have high socio-economic and environmental impacts. However, drought is more than a physical phenomenon or natural event. Its impact results from the relation between a natural event and demands on the water supply, and it is often exacerbated by human activities. The traditional approach to drought management has been reactive, re...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید