Globally, the COVID-19 pandemic has had significant effects on human life and the environment, especially freshwater ecosystems. Despite its many effects, the pandemic has increased the quality of the environment, making it possible to recover devastated ecosystems. During the lockdown period of COVID some improvements in environmental quality was observed in different parts of the world by many researchers. Due to increased manufacturing and urbanization over the past few decades, Dhaka's periphery rivers have become heavily polluted. Hence in this study an attempt has been taken to depict the post covid surface water quality status of heavily polluted Turag river in Bangladesh. So, for the first time, a GIS-based spatial analysis of water quality index was used to try to measure 16 water quality parameters (pH, EC, temperature, turbidity, salinity, TDS, DO, Na+, K+ Ca2+, Mg2+ Cl−, Cu, Pb, Fe, Cd) in the water of the river Turag. So, it could be used as a point of reference for future research in Bangladesh. At first WQI for the collected samples were calculated and it was observed that all the sampling stations water quality status were extremely poor since WQI > 100. Kriging method of interpolation was used to predict the engulfing WQS and visually present those using GIS maps. The upshots of this study is extremely alarming as 100% of the observed samples WQS exceeded the standard limits. On the basis of these findings, we advocated the immediate implementation of appropriate water management methods and policies in order to manage and protect the water resources.
The COVID-19 pandemic has had enormous effects on human life and the environment, particularly freshwater ecosystems, on a global scale. Despite its numerous effects, the pandemic has improved the quality of the environment, allowing devastated ecosystems to recover. During the COVID lockdown period, many researchers observed positive amendments in environmental quality in various parts of the world. Due to increased industrialization and urbanization over the past several decades, Dhaka's peripheral rivers have grown highly polluted. In this study, an attempt was made to illustrate the post-covid surface water quality scenario of Bangladesh's hihgly contaminated Turag River. Therefore, for the first time, a GIS-based spatial analysis of water quality index was used to endeavor to quantify 16 water quality parameters (pH, EC, temperature, turbidity, salinity, TDS, DO, Na+, K+ Ca2+, Mg2+ Cl-, Cu, Pb, Fe, and Cd) in the river Turag. Thus, it could serve as a reference work for future researches in Bangladesh. After calculating the WQI for the collected samples, it was determined that the water quality status at all sampling stations was extremely poor because each WQI was greater than 100. Using the Kriging method of interpolation, the encroaching WQS were predicted and visually represented using GIS maps. The findings of this study are particularly concerning, as all recorded WQS samples surpassed the standard limits. Based on these findings, we urged for the rapid deployment of proper water management practices and policies in order to safeguard and manage the water resources.
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