Chemical water quality gradients in the Mongolian sub-catchments of the Selenga River basin
作者： Wolf von Tümpling , Martin Kappas , Daniel Karthe , Gunsmaa Batbayar , Martin Pfeiffer
DOI: 10.1007/S10661-017-6123-Z
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摘要: Even though the Selenga is main tributary to Lake Baikal in Russia, largest part of River basin located Mongolia. It covers a region that highly diverse, ranging from almost virgin mountain zones densely urbanized areas and mining zones. These contrasts have strong impact on rivers their ecosystems. Based two sampling campaigns (summer 2014, spring 2015), we investigated longitudinal water quality pattern along its tributaries While headwater regions typically had very good status, wastewater urban impacts were found be pollution sources tributaries. The highest nutrient concentrations catchment Tuul River, severely elevated trace elements (As, Cd, Cu, Cr, Fe, Mn, Ni, Pb, Zn), nutrients (NH4+, NO2-, NO3-, PO43-), selected major ions (SO42-) River. Moreover, element during 2015 (a time when many mines not yet started operation) markedly lower than summer indicating additional metal loads measured 2014 related activities. Nevertheless, all taken samples channel Mongolian complied with standard (MNS 1998) for parameters.
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