نتایج جستجو برای: anthropogenic factor

تعداد نتایج: 867506  

Journal: :international journal of environmental research 0

a total of 148 groundwater samples were collected from bore wells from thirumanimuttar sub-basin for two seasons to identify major geochemical process activated to alter groundwater chemistry. the study revealed relationships with the lithology and anthropogenic process. groundwater in the region was dominated by na – ca – mg and cl and hco3 types. the (ca +mg) versus tz+ plot for both seas...

Journal: :international journal of environmental research 0
m. kargar faculty of natural resources, department of environment, university of tehran, karaj, iran n.a. khorasani faculty of natural resources, department of environment, university of tehran, karaj, iran m. karami faculty of natural resources, department of environment, university of tehran, karaj, iran g.h. rafiee faculty of natural resources, department of fisheries, university of tehran, karaj, iran r. naseh national iranian copper industry company (nicico), research and development center, kerman, iran

the contents of as, cd, cu and mo were determined in soil surrounding meyduk tailings dam based on 21 surface soil samples. assessment of toxic element pollution in studied soil samples needs knowledge of pre-anthropogenic metal concentration to act as a reference against which measured values could be compared. estimating the background values was executed by sampling rocks adjacent to soil sa...

2016
Doug MacNearney Karine Pigeon Gordon Stenhouse Wiebe Nijland Nicholas C Coops Laura Finnegan

Anthropogenic landscape change (i.e., disturbance) is recognized as an important factor in the decline and extirpation of wildlife populations. Understanding and monitoring the relationship between wildlife distribution and disturbance is necessary for effective conservation planning. Many studies consider disturbance as a covariate explaining wildlife behavior. However, we propose that there a...

Journal: :E3S web of conferences 2021

The identification of potential sources groundwater pollution in the Isly basin (North-East Morocco) and understanding their spatial variability, response to certain natural anthropogenic forcings, were approached through combined study ionic ratios statistical analyses hydro-chemical data. results Principal Component Analysis (PCA) show that two factors explain nearly 78% variance. Factor 1 is...

ژورنال: بوم شناسی آبزیان 2015
bahador, mehrshad, Dehghani, Mohsen, moradi, abbas, Naji, Abolfazl,

Toxicity of trace metals in the environment, bioaccumulation in aquatic environments and in food chains are of great importance.This study concentrates on the distribution patterns of some heavy metals (Pb, Ni, Zn and Fe) in surface sediments of Shoor River estuary to obtain an overall classification for the origins of the metals in the studied area. In order to determine the degree of Contamin...

Journal: :journal of tethys 0

soil contamination in the vicinity of the abandoned lakan lead and zinc mine was studied. the results showed that over the past decades, the environmental pollution was caused by lead, zinc tailings dam and acid mine drainage. the average of lead, zinc, cadmium, copper and nickel is 1295, 4273, 27, 185 and 92 mg/kg, respectively in the soils of tailings dam. these metals were continuously dispe...

2013
Y. Takahashi T. Furukawa Y. Kanai M. Uematsu G. Zheng M. A. Marcus

Atmospheric iron (Fe) can be a significant source of nutrition for phytoplankton inhabiting remote oceans, which in turn has a large influence on the Earth’s climate. The bioavailability of Fe in aerosols depends mainly on the fraction of soluble Fe (= [FeSol]/[FeTotal], where [FeSol] and [FeTotal] are the atmospheric concentrations of soluble and total Fe, respectively). However, the numerous ...

Journal: :Environmental pollution 2011
A Arruti I Fernández-Olmo A Irabien

Air pollution by particulate matter is well linked with anthropogenic activities; the global economic crisis that broke out in the last year may be a proper indicator of this close relationship. Some economic indicators show the regional effects of the crisis on the Cantabria Region. The present work aims to evaluate the impact of the economic crisis on PM10 levels and composition at the major ...

2018
Xiaoqiong Li Mingfang Ting Dong Eun Lee

Anthropogenic aerosols are a major factor contributing to human-induced climate change, particularly over the densely populated Asian monsoon region. Understanding the physical processes controlling the aerosol-induced changes in monsoon rainfall is essential for reducing the uncertainties in the future projections of the hydrological cycle. Here we use multiple coupled and atmospheric general ...

Journal: :Environmental pollution 2009
Ling Zhang Lu Wang Kedong Yin Ying Lv Derong Zhang

In this study, the natural Cu background concentration and Cu natural and anthropogenic contamination in soil, water and crop were investigated systematically in Huangshi area. The results show that regional geology is the dominant factor controlling the natural Cu background concentration in soil and water, and that pH is important to control the vertical distribution of Cu in soil under the s...

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