Assessment of groundwater quality in Songinokhairkhan District, Ulaanbaatar, Mongolia

DOI

10.2991/978-94-6463-278-1_13How to use a DOI?

Abstract

This study presented the hydrochemical characteristics of groundwater in the “Songinohairkhan district”. We collected 111 samples from deep and dug wells in 2020 and major ions and pollution indicators were analyzed in the laboratory, and calculated the Water Quality Indices (WQI). The most dominant water type was first Ca-HCO₃ (70.3%), the second was Mg-HCO3, Mg-[Ca]-HCO₃ (15.3%), the third was Ca-mixed and Ca-[Na]-mixed (2.7%), the fourth was Ca-CI (0.9%). In the case of mineralization, about 0.9% of the groundwater showed very fresh, 75.7% was fresh, 20.7% was freshly or relatively high mineralization, and 2.7% was salty. However, in the case of hardness, 15.3% was soft, 53.2% was softish, 23.4% was slightly hard, 3.6% was hard, and 4.5% was very hard. About 12.6% of the samples were dominated by magnesium and manganese concentrations exceeded the standard of drinking water in the 21 samples (18.9%) which was 1.1-3.16 times higher than the permissible level of the standard. Additionally, As, Sr, and U were found to be higher than the MNS0900:2018 standard in some groundwater. The WQI indicated that the groundwater samples were excellent (65.8 %), good (27%), poor (4.5%), very poor (1.8%), and 0.9% of the samples showed unsuitable water for drinking purposes. Generally, in the study region, fresh and softish water was distributed and most of the samples were suitable for drinking water standards. The Emelt, Tolgoit, and Bayankhoshuu areas have groundwater with relatively high mineralization and hardness. In other words, about 18% of groundwater does not meet the above standard in one or several parameters.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Enkhjargal Togtokh
AU  - Odsuren Batdelger
AU  - Bambasuren Zorigt
AU  - Uuriintuya Gantsetseg
AU  - Gerelt-Od Dashdondog
AU  - Dalaijargal Sandag
AU  - Erdenesetseg Tsogtbayar
AU  - Renchinbud Badrakh
PY  - 2023
DA  - 2023/10/29
TI  - Assessment of groundwater quality in Songinokhairkhan District, Ulaanbaatar, Mongolia
BT  - Proceedings of the Fourth International Conference on Environmental Science and Technology (EST 2023)
PB  - Atlantis Press
SP  - 125
EP  - 135
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-278-1_13
DO  - 10.2991/978-94-6463-278-1_13
ID  - Togtokh2023
ER  -