polycyclic aromatic hydrocarbons (pahs) in the priority controlling list of us epa weresystematically evaluated in surface sediments in dianchi lake and its estuaries. total pah concentrations(σpahs) varied from 210 to 11,070 ng/g dry weight (d.w.) in dianchi lake, and from 230 to 12,271 ng/g d.w.in the estuaries. σpahs in sediments from caohai section were higher than those from waihai section...

in the last decade, the water level of urmia lake has experienced a dramatically drop. although the causes of this lose have been investigated, the significance of groundwater supplies had not been concerned so much. in the present research, groundwater resources around the lake were explored as its water supplier. the number of wells and groundwater withdrawal has been increased because of cul...

abstract irregular extraction from agricultural wells around parishan lake, moreover fall of groundwater surface and water salty, would affect the level of lake water and move lake water into wells. in this study we have evaluated the externalities of extraction from agricultural wells around the lake. therefore feedback effect is considered between agricultural activity around the lake and lev...

Hard water lakes are known to precipitate Ca through a complex number of factors. Dal, a shallow Himalayan hard water lake was observed to remain saturated with respect to calcium carbonate CaCO3 [(S.I.) range: 0.1 – 0.7, avg. 0.3] throughout the study period of Sept. 1999 to Aug. 2000. CaCO3 precipitating tendency of lake waters primarily results from high surface loading of 422.7g Ca m yr, wh...

L Baikal in southeastern Siberia, the “Sacred Sea,” incites strong emotions and action in Russia. In March 2006, 5000 people in Irkutsk, Russia, protested the proposed construction of an oil pipeline scheduled to pass within 800 meters (m) of Lake Baikal’s shoreline, and, within days, President Putin announced the pipeline would be rerouted outside the lake’s watershed (Cullison 2007). In July ...

hydrographically bolivian poopó lake is located in the basin of desaguadero river and it has over a dozen main tributary rivers and other smaller rivers with lower flow. the mine water discharge from the abandoned and current mining activities polluted these rivers by carrying heavy metals, dissolved and suspended solids which in turn polluted the poopó lake which is considered as an important ...

abstract the urmia lake as an important water body in the northwest of iran, recently is faced with a critical level reduction, which makes it important to evaluate the causes. in this regard understanding of the lake's behavior and assessing effect of tele-connections on lake level oscillations is necessary. this subject constructs objective of the present paper that applies the spectral analy...