نتایج جستجو برای: water systems
تعداد نتایج: 1683604 فیلتر نتایج به سال:
abstract the main purpose of this study was to determine farmers’ satisfaction towards pressurized irrigation systems in kermanshah province. this study used a mixed method design with descriptive correlation emphasis. a researcher made questionnaire was used to collect data. a random sample of 274 farmers who have been equipped with pressurized irrigation systems during the last three years pa...
gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...
چکیده ندارد.
rivers and runoff have always been of interest to human beings. in order to make use of the proper water resources, human societies, industrial and agricultural centers, etc. have usually been established near rivers. as the time goes on, these societies developed, and therefore water resources were extracted more and more. consequently, conditions of water quality of the rivers experienced rap...
Introduction and purpose: The need to access and produce clean water is currently felt more than ever by the communities due to the pollution of drinking water sources and the consumers’ growing concern and awareness about the absence of healthy drinking water. As a result, in the recent years, the use of water purification systems has been widely increased in the urba...
چکیده ندارد.
Aquaponic is a combination of fish and plant cultivated in recirculating systems. Fish culture in closed recirculating systems causes organic waste accumulation in the system. If these metabolites are used for plant nutrition, they are not mere waste, but have economical value and however benefit the fish production systems. Most aquaponic systems are designed as perlite-filled media, thin laye...
evaluating the performance of irrigation systems by providing the possibility of increasing irrigation efficiency in those systems is an important factor in the field of water resources management. in this study, the performance of three systems were evaluated, including linear move sprinkler irrigation systems in maize, sugar beet and alfalfa fields of magsal agro-industrial company which is l...
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