نتایج جستجو برای: drought management

تعداد نتایج: 880686  

2005
ANNE C. STEINEMANN

Drought hazards, and the ability to mitigate them with advance warning, offer potentially valuable applications of climate forecast products. Yet the value is often untapped, owing to the gap between climate science and societal decisions. This study bridged that gap; it determined forecast needs among water managers, translated forecasts to meet those needs, and shaped drought decision making ...

A remarkable part of Iran is surrounded by arid and semi-arid areas, which are faced with drought and salinity stresses. Today, the management of salinity and drought stresses in the landscape, has a particular importance. In this study, the drought and salinity tolerance of Phyla and Frankenia were investigated, which consisted of 12 treatments (Four levels of salinity at 0.5, 3, 6 and 9 dS/m ...

2005
A. T. Jeyaseelan

Space technology has made substantial contribution in all the three phases such as preparedness, prevention and relief phases of drought and flood disaster management. The Earth Observation satellites which include both geostationary and polar orbiting satellites provide comprehensive, synoptic and multi temporal coverage of large areas in real time and at frequent intervals and ‘thus’ have bec...

2008
Andrew W. Wood

Over the last decade, great strides have been made in land surface modeling at regional to continental scales. The North American Land Data Assimilation System has developed new approaches for estimating current land surface moisture conditions (e.g., soil moisture, snow and runoff) as well as retrospective reconstructions of the same variables. These science-based products were motivated by a ...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
ستاره امیرخانی دانش آموخته گروه ترویج و آموزش کشاورزی دانشکده کشاورزی دانشگاه تربیت مدرس محمد چیذری استاد گروه ترویج و آموزش کشارزی دانشکده کشاورزی دانشگاه تربیت مدرس سید محمود حسینی دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران

drought, known as one of the serious natural disasters, has adversely affected climatic equilibrium of the countries during recent years, bringing about various economic and social losses. the purpose followed in this study was to assess the effective factors involved in the adoption of the type of management wheat farmers of varamin township choose to alleviate the situation. the methodologica...

Journal: :Tree physiology 2012
Britta Eilmann Andreas Rigling

Climate change is challenging forestry management and practices. Among other things, tree species with the ability to cope with more extreme climate conditions have to be identified. However, while environmental factors may severely limit tree growth or even cause tree death, assessing a tree species' potential for surviving future aggravated environmental conditions is rather demanding. The ai...

2015
Hamid R. Safavi Kian Malek Ahmadi

Although drought impacts on water quantity are widely recognized, the impacts on water quality are less known. The Zayandehrud River basin in the west-central part of Iran plateau witnessed an increased contamination during the recent droughts and low flows. The river has been receiving wastewater and effluents from the villages, a number of small and large industries, and irrigation drainage s...

Farmers frequently cope with risks due to the uncertainty of climatic conditions. Population growth, changes in agricultural policies, environmental regulations and the degradation of natural resources such as soil and water also present farmers with numerous challenges. Although farmers have experience in coping with a certain degree of uncertainty, increased climate variability and changes ma...

Journal: :Remote Sensing 2014
Tarin Paz-Kagan Natalya Panov Moshe Shachak Eli Zaady Arnon Karnieli

Drought events cause changes in ecosystem function and structure by reducing the shrub abundance and expanding the biological soil crusts (biocrusts). This change increases the leakage of nutrient resources and water into the river streams in semi-arid areas. A common management solution for decreasing this loss of resources is to create a runoff-harvesting system (RHS). The objective of the cu...

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