Analysis of distribution dissolved oxygen concentration in Kali Lamong river estuary, Surabaya during pandemic Covid-19

Dissolved oxygen (DO) is the amount of gaseous oxygen dissolved in water, which is influenced by atmospheric pressure, temperature, salinity, water turbulence, photosynthesis, respiration, and waste. The amount of dissolved oxygen DO in a river or lake represents the quality of water. Water molecules contain an oxygen atom. However, it is not needed by aquatic organisms living in natural water. This study aims to analyze the distribution of dissolved oxygen DO concentration distribution in the Kali Lamong river estuary during pandemic Covid-19â in.the dry season. The concentration of dissolved oxygen DO was measured by DO meter in real-Time. The result demonstrated that the average concentration of dissolved oxygen dissolved oxygen concentration in the Kali Lamong river estuary was 5.29â mg/L. The results show that the water quality of Kali Lamong is classified in second class. These criteria indicate the water classification that can be utilized for water infrastructure/facilities. © 2022 Author(s).

Analysis of Ammonia in Kali Lamong River Estuary Surabaya during Pandemic Covid-19

Water quality monitoring is an important instrument in the management of freshwater resources because they offer essential information about the physical, chemical, and biological water resources status, determining patterns and changes over time, and identifying emerging water quality issues especially in a specific situation. This study investigates the ammonia concentration in Kali Lamong river estuaries Surabaya to comprehensive the level of pollution that occurs during pandemic Covid-19. This research was conducted in the river downstream of Kali Lamong in the dry season. Sampling has occurred in 3 stations. Each station has 3 sampling sites that were ¼ of the left side, ½ from the side of the left, and ¼ of the right side. The measurement ammonia in water was measured by SNI 06-6989.30-2005 method. The laboratory result depicted the highest of ammonia concentration (0.765 mg/L) at B1 site. The ammonia concentration in water was <0.02 to 0.13 mg/L in another site. The water sampling result was classified based on PP number 22 of 2021 implementation of protection and management of environment in sixth appendix about national water quality standard with third-class purpose. © 2021 Institute of Physics Publishing. All rights reserved.