Urmia Lake has been designated as an international park by the United Nations. The lake occupies a 5700 km2 depression in northwestern Iran. Thirteen permanent rivers flow into the lake. Water level in the lake has been decreased 3.5 m in the last decade due to a shortage of precipitation and progressively dry climate. Geologically the lake basin is considered to be a graben of tectonic origin....

Although arsenic (As) contamination of groundwater in the Bengal Basin has received wide attention over the past decade, comparative studies of hydrogeochemistry in geologically different sub-basins within the basin have been lacking. Groundwater samples were collected from sub-basins in the western margin (River Bhagirathi sub-basin, Nadia, India; 90 samples) and eastern margin (River Meghna s...

Water salinization changes hydrogeochemistry, affects the quality and quantity of groundwater available for human consumption its mitigation is time-consuming. A large brackish lagoon Atlantic Ocean surround aquifer São José do Norte town (Brazil). Population economic growth demand more domestic agricultural purposes, stressing aquifer. Despise aquifer’s social-economic status, potential impact...

man's past condition is related to his present life and history means surveying the quality of the past activities whose traces remain in the present time. the main field of historical research is man's past life, the stages which have been put behind in the process of evolution and changes as well as progresses made in these stages. history is a means to provide human beings with a complete in...

The Ring of Cenotes (RC) extends along the edge Chicxulub crater, in limestone platform Yucatan Peninsula (YP), where groundwater shows two preferential flow paths toward coast near Celestun and Dzilam Bravo towns. objectives this study were to describe regional hydrogeochemical evolution RC, its association with dissolution/precipitation minerals present pathway ocean. These results obtained b...

In this paper the investigation results of thermal springs of the Mutnovsky Volcano (Kamchatka, Russia) are provided. Mud pots in the Donnoe Field of this volcano have a unique solution composition. High concentrations of a wide spectrum of chemical elements such as Al, Ti, V, Cr, Ni, Co, REE and PGE were discovered there. To explain the mechanisms of solution formation it was made an attempt t...