WATER QUALITY ASSESSMENT OF TUUL RIVER IN ULAANBAATAR, MONGOLIA

Abstract

A nation’s potable water supply is a contributing factor to the national wealth of that nation. The increase in domestic sewage, industrial effluents, agricultural wastes, inadequate mining operation, urban runoff, and numerous other pollutants and overpopulation in the capital negatively influence the water quality of the TUUL river near to ULAANBAATAR and natural environment and have a lead to a disturbance of the ecological balance. Due to these aspects, the river's quality level has been deteriorating day by day. To change this situation, Mongolians need to check the actual water quality of the river is the first demand for future projection; this requirement was the object of this research paper which is called “river quality assessment of the Tuul River in Mongolia”. In a range of this study following work has been done. For instance, to determine the water quality of the Tuul river, which has based on an extensive dataset of years between 2015 and 2019, using seven biochemical and physical variables at eight sampling points that locate along with river length near Ulaanbaatar. The dataset was obtained from the central environmental laboratory of Mongolia. The “Canadian council minister of environment” (CCMEWQI) method used for the calculation part of this work; according to this method, the river’s WQI identified, which is based on the Mongolian water quality standard and classification guideline, chosen sections of the Tuul River in the area around the Ulaanbaatar city, water quality belong to fairly and strongly polluted due to high ammonium(NH4) concentration. In the criteria of the European Union water quality standard, the downstream of the Tuul River is a critical section. An adequate wastewater treatment plant (WWTP) has been required to enhance this situation, and an artificial increment of dissolved oxygen (DO) concentration has become crucial to improve water quality. Priority may brand new wastewater treatment plant is required to the Ulaanbaatar city to safety the river water quality as soon as possible.