نتایج جستجو برای: groundwater type is na

تعداد نتایج: 7987648  

2013
Mutewekil M. Obeidat Muheeb Awawdeh Hussein Al-Mughaid

An assessment of groundwater pollution in the area surrounding a domestic wastewater treatment plant in northern Jordan has been carried out. Groundwater in the study area is classified as alkaline earth water with increased portions of alkalis and prevailing chloride, tending to shift to alkaline water with the dominance of chloride. This trend indicates mixing between the two end members of f...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان - دانشکده علوم انسانی و اجتماعی 1392

most specialists in the field of foreign language teachingconsiderreading skill as an interactive process between the reader’s prior knowledge and the text.accordingly, the activation of prior knowledge for an effective comprehension is very important. it is generally agreed that the pre-reading phase is the stage where this type of interaction and activation may be enhanced throughcertain stra...

2017
Yong Xiao Xiaomin Gu Shiyang Yin Xingyao Pan Jingli Shao Yali Cui

The usage of reclaimed water can efficiently mitigate water crises, but it may cause groundwater pollution. To clearly understand the potential influences of long-term reclaimed water usage, a total of 91 samples of shallow and deep groundwater were collected from a typical reclaimed water use area during the dry and rainy seasons. The results suggest both shallow and deep groundwater are mainl...

Journal: :Environmental monitoring and assessment 2010
Mohan Viswanathan Prasanna S Chidambaram A Shahul Hameed K Srinivasamoorthy

Gadilam river basin has gained its importance due to the presence of Neyveli Lignite open cast mines and other industrial complexes. It is also due to extensive depressurization of Cuddalore aquifer, and bore wells for New Veeranam Scheme are constructed downstream of the basin. Geochemical indicators of groundwater were used to identify the chemical processes that control hydrogeochemistry. Ch...

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

abstract the influence of cation?? and anion?? interactions on the strength and nature of n…h hydrogen bond has been investigated by quantum chemical calculations in s-triazine…3hf complex. ab initio calculations were performed at mp2/6-311++g(d,p) level of theory. the natural bond orbital (nbo) analysis and the bader’s quantum theory of atoms in molecules (aim) were also used to elucidate t...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2011
P K Mohapatra R Vijay P R Pujari S K Sundaray B P Mohanty

Variability of groundwater quality parameters is linked to various processes such as weathering, organic matter degradation, aerobic respiration, iron reduction, mineral dissolution and precipitation, cation exchange and mixing of salt water with fresh water. Multivariate statistical analyses such as principal component analysis (PCA) and hierarchical cluster analysis (HCA) were applied to the ...

Ghale-madreseh is the first point that the saline and sulfurous streams flow into Tembi River, one of the well-known saline rivers in Khuzestan province, Iran. This river is one of the main sources of increasing Karun River’s salinity, which is the largest river in Iran in terms of discharge. There are three saline and sulfurous springs (Shour-1, Shour-2m and Namak Springs) as well as a drinkab...

In many urban areas, groundwater has been exploited neglecting to wet and dry periods owing to of surface water deficit. In this study, using the percent of normal rainfall index, 36 year (1971-2008) were studied and a drought event and a wet event were determined. The reason to choose two consecutive years is the effect of early wet period on groundwater quality. Physicochemical characteristic...

Journal: :محیط شناسی 0
رضا حسن زاده کارشناس ارشد زمین شناسی زیست محیطی. دانشگاه شهید باهنر کرمان.–مرکز بین المللی علوم، تکنولوژی پیشرفته و علوم محیطی احمد عباس نژاد استادیار بخش زمین شناسی دانشگاه شهید باهنر کرمان محمد علی حمزه کارشناس ارشد زمین شناسی زیست محیطی، کارشناس مؤسسه ملی اقیانوس شناسی

in this article, groundwater samples in urban areas of kerman studied to assess the degree of pollution by heavy metals and major ions and other water quality parameters as a consequence of geology and anthropogenic sources. 43 samples were collected and analyzed by graphite furnace atomic absorption spectrometry, titration and potentiometery for some heavy metals (cd, cr, cu, mn, pb and zn), m...

Journal: :محیط شناسی 0
مرجان عبدالهی کارشناس ارشد رشتۀ زمین شناسی زیست محیطی، دانشکدۀ علوم زمین، دانشگاه شاهرود افشین قشلاقی استادیار، دانشکدۀ علوم زمین، دانشگاه شاهرود احمد عباس نژاد دانشیار، گروه زمین شناسی، دانشگاه شهید باهنر کرمان

introduction groundwater resources in arid-semiarid zones universally suffer from problems of over-abstraction and declining water tables. in addition to the issues related to quantity, degradation of groundwater quality now assumes major importance in the arid and semiarid regions. in such areas, natural factors such as the low precipitation, combined with high evapotranspiration, result in hi...

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