نتایج جستجو برای: in drastic method
تعداد نتایج: 17233902 فیلتر نتایج به سال:
Abstract Evolving groundwater vulnerability from DRASTIC to modified methods helps choose the most accurate areas that are delicate toward pollution. This study aims modify with land use and water quality index for assessment in Halabja-Khurmal sub-basin, NE/Iraq. The sub-basin is calculated nine hydrogeological parameters by overlay weighting method. As a result, 1.3% of total area has very hi...
Abstract The DRASTIC method is one of the most widely used groundwater vulnerability assessment techniques. In areas where main useful aquifers are covered with an extra layer diverse sediments, a further modification required for more precise estimation. this article, was improved in characterized by Quaternary deposits remarkably influencing infiltration conditions. Three parameters were modi...
in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...
this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...
introduction water is the most important parameter in the development of human societies. one of the pillars in the development of water resources is the investigation of environmental conditions and environmental compatibility of the project. identification of the areas vulnerable to pollution can play a major role in development strategies. in most areas of iran, located in the arid and semi-...
به منظور دستیابی به یک روش مناسب و موثر برای حفاظت منابع آب زیرزمینی از آلودگی هایی که در آینده آن را تهدید می کند، محققین و مدیران، سیستم های ارزیابی آسیب پذیری سفره های آب زیرزمینی را به منظور پیش بینی مناطقی که دارای استعداد بیشتری به آلوده شدن نسبت به سایر مناطق هستند، ارائه نموده اند. در این خصوص، جهت تهیه نقشه آسیب پذیری آبخوان دشت ملایر که تأمین کننده آب بخش های کشاورزی، صنعت و شرب منطقه...
seismic retrofit strategies have been developed in the past few decades following the introduction of new seismic provisions and the availability of advanced materials and methods. it can be observed that new approaches to deal with more lateral forces are more innovative and more energy absorbent. in line with this, there is a growing trend toward the use of steel shear walls as a system with ...
this research is a study on indicators of listening instruction in iranian english as a foreign language (efl) curriculum at guidance school and high school educational levels. this thesis aims at determining: a) the indicators of listening instruction at guidance school and high school efl curriculum. b) the indicators of listening instruction in irans guidance school and high school efl curri...
reinsurance is widely recognized as an important instrument in the capital management of an insurance company as well as its risk management tool. this thesis is intended to determine premium rates for different types of reinsurance policies. also, given the fact that the reinsurance coverage of every company depends upon its reserves, so different types of reserves and the method of their calc...
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