توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Spatial and seasonal variation of ground water quality in Qaenat, South Khorasan, Iran
نویسنده(ها): ، ، ،
اطلاعات انتشار: نهمین کنگره بین المللی مهندسی عمران، سال
تعداد صفحات: ۸
The spatial distribution and seasonal variation of Cl–, Ca+2, EC, Mg+2, Na+, NO3–, SO4–2, TDS, HCO3–, Alkalinity, and Total Hardness were obtained by surveying 25 sampling stations in 2009 and 2010. All the parameters were analyzed by standard methods and spatial distribution maps drown using Arc GIS 9.3 and GS+5.1 softwares using kriging method. In the present study an attempt has been made to evaluate the variation of the contaminated parameters in the different seasons and years with the help of normalized scatter coefficient formula which for EC, Mg+ Ca+2, 2 NO3–, SO4–2, HCO3–, Alkalinity, and Total Hardness show consistent increase form 2009 to 2010 while there is a general decrease in Cl–, TDS, Na+ concentrations. The results of the study showed in 2009 and 2010 with passing the time from cold seasons to warm seasons the contaminated parameters EC, TDS ,Cl–, Na+ are seen to be increasing throughout the ground water.<\div>

۲A Study on Strategies of Air Pollution Control and Reduction in Urban Areas
نویسنده(ها): ، ، ،
اطلاعات انتشار: نهمین کنگره بین المللی مهندسی عمران، سال
تعداد صفحات: ۱۲
There are various air pollution control technologies and strategies to reduce air pollution such as reduction of the vehicle producing air pollution, increasing public transportation, promoting reduction in travels demand, encourage to active transport, environmentally friendly fuels, scrap old cars, vehicle inspection and maintenance program, vehicle emission control technologies and etc. In the present study the efficacy and application of various strategies for traffic pollution control was reviewed. The strategies and techniques are categorized into four group viz .alternative fuel, passive control, traffic management and vehicles emission control. The present study revealed that utilization of alternative fuels, increasing public transportation, proper design of the city for air pollution control, increasing green space, scrapping old vehicles, speed limitation, location of parking and the inspection and maintenance program are useful for control and reduction traffic pollution in urban areas<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه