نتایج جستجو برای: due to global water shortages
تعداد نتایج: 10906231 فیلتر نتایج به سال:
There has been increased use of cable median barriers in recent years to address the growing problem of crossmedian crashes. Cable median barriers are viewed as a highly effective means to mitigate the problem at a lower cost and in a shorter time frame. This has occurred despite limited current guidance on effective use of the various designs that have emerged over the past ten years. Research...
Due to its location in the dry belt, the vast country of Iran has always been faced with the problem of water shortages. In such a climate one should take measures to increase the productivity and improve the efficiency of irrigation through expansion of water-conserving technology in the agricultural sector, as this is the largest and most important consumer of water. Therefore this study aime...
abstract this study was carried out to compare disinfecting effects of nanosilver with other feed disinfectants on layer hen performance, immune system, gastrointestinal microflora and intestinal morphology. total of 90 layers (lsl) were divided into five groups consisting: 1-control, 2- formalin (200 ppm), 3- formaycin (200 ppm), 4- nanosilver in drinking water (7.5 ppm) and 5-nanosilver in f...
due to its location in the dry belt, the vast country of iran has always been faced with the problem of water shortages. in such a climate one should take measures to increase the productivity and improve the efficiency of irrigation through expansion of water-conserving technology in the agricultural sector, as this is the largest and most important consumer of water. therefore this study aime...
Water shortages pose significant threats to local water security and food production around the world. managers have resorted various resources planning measures overcome these challenges. For first time for a case study in Iran, we provide comparative analysis of two such measures: physical virtual inter-basin transfers (IBWT). We evaluate green blue footprints (WF) associated with 39 crops gr...
postcolonial feminism, also dubbed as third world feminism, is an innovative approach, demonstrating the way women of colonized countries suffer from both native patriarchies and imperial ideology. also due to this double-colonization, postcolonial feminists contend that third world women are subjected to both colonial domination of empire and male domination of patriarchy. while western femini...
looking back into the past shows that iran has always been faced with water shortages, and this has not been a problem confined to a certain period or generation. therefore, proper attention to optimal use of water resources and a move towards sustainable use of extant water resources is indispensable. in this study, using multi period mathematical programming model, the effects of the two goal...
asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...
The area under irrigated corn has significantly increased in the Charente river basin during the last 10 years. Corn water requirements are maximum in the summer, the period with low water flows and highest environmental vulnerability. Periods of water shortage during which irrigation is temporarily forbidden occur frequently. To reduce water demand, specific water saving policies are required....
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