نتایج جستجو برای: introductiondue to shortage of fresh water resources

تعداد نتایج: 22218770  

2015

How do countries that share cross-border rivers respond to periods of abnormally low water availability? This article argues that understanding whether countries react cooperatively or conflictually to within-basin shortages is just as important as identifying the influence of cross-basin differences in absolute availability. To study the effects of within-basin, relative scarcity, the article ...

Journal: :Journal of experimental botany 2010
L J Luo

Rice is the staple food and rice production consumes about 50% of the fresh water resources in China. In addition, drought is one of the most important constraints in rice resulting in large yield losses and limiting the average yield increase of the country. There is an urgent need to enhance water-saving (W) capacity or drought resistance (DR) of rice. WDR varieties can be developed through i...

1998
Nicholas J. Barnes

Conventional techniques for assessing and monitoring water quality have been primarily based either on the use of living material as “bioindicators” or on the employment of analytical measurements to provide information about the physical and chemical status of aquatic ecosystems. The former have predominantly utilised the presence of selected species to indicate the quality of waters in which ...

Journal: :Environmental science & technology 2008
Julie Beth Zimmerman James R Mihelcic James Smith

This inequality is especially critical for Asia, which has 60% of the world’s population but only 36% of the world’s water. Water quality in terms of pollutant loading also is not distributed equally and is related to the type of use and a country’s level of development (Figure 2). Developing countries often have less capacity to improve water quality and depend on lower-quality water for a var...

Journal: :Environmental Health Perspectives 2001

Journal: :Chinese Geographical Science 2009

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1390

learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده معماری و شهرسازی 1393

چکیده نمایشگاه های جهانی یا اکسپو عنوانی ست که از سال 1851 میلادی در لندن توسط همسر ملکه انگلستان شکل گرفت ، هدف اولیه این نمایشگاه ها نمایش دستاورد های صنعتی بود، اما در طول 165 سال که این نمایشگاه های برگزار گردیدند ، رویکرد آنها تغییر کرده است . در هر دوره به یک شعار که در واقع دغدغه اصلی جهان، در آن زمان بوده است ، پاسخ داده شده و راه حل کشور های مختلف در مورد آن موضوع به نمایش گذارده شد...

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