Dynamics of Dissolved Oxygen in Relation to Saturation and Health of an Aquatic Body: A Case for Chilka Lagoon, India

Table 3

List of parameters.

Parameter (units)	Description	Range	Value	Source
Parameters
O (mgO2L^−1)	Dissolved oxygen
Oss (mgO2L^−1)	Dissolved oxygen saturation concentration
NH4 (mgNL^−1)	Ammonium nitrogen concentration
Phy (mgCL^−1)	Phytoplankton carbon concentration
Zoo (mgCL^−1)	Zooplankton carbon concentration
𝑊Temp (°C)	Water temperature
Rate parameters
𝐾𝑎 (day^−1)	Reaeration rate at 20°C		Computed
𝐾12 (day^−1)	Nitrification rate constant at 20°C	0.005–0.54	0.54	[5]
𝐾1𝑅1 (day^−1)	Diatoms respiration rate constant at 20°C	0.05–0.2	0.1	[5]
𝐾2𝑅 (day^−1)	MPB respiration rate constant at 20°C	0.05–0.2	0.1	[5]
𝐾1𝑅2 (day^−1)	Cyanophyceans respiration rate constant at 20°C	0.05–0.2	0.147	[5]
𝑍1𝑅 (day^−1)	Zooplankton respiration rate constant at 20°C		0.084	[15]
𝐾Loss (Assumed) (day^−1)	Loss rate due to other processes		1.86	—
Temp correction coefficients
𝜃12 (none)	Nitrification temperature correction coefficient	1.045–1.08	1.08	[5]
𝜃1𝑅 (none)	Respiration temperature correction coefficient	1.04–1.08	1.08	[5]
𝐾𝑇 (none)	Mineralisation temperature correction coefficient		0.063	[5]
Half-saturation constants
𝐾NIT (mgO2L^−1)	Half-saturation constant of nitrification	1-2	2	[5]
Growth parameters
𝐺Phy (day^−1)	Specific growth rate constant of Diatoms	0.2–4	1.3	[5]
𝐺MPB (day^−1)	Specific growth rate constant of MPB	0.2–4	1.45	[5]
𝐺CPhy (day^−1)	Specific growth rate constant of Cyanophyceans	0.2–4	2.041	[5]
Mortality parameters
𝐷Phy (day^−1)	Mortality rate constant of Diatoms	0.005–0.2	0.1	[5]
𝐷MPB (day^−1)	Mortality rate constant of MPB	0.005–0.2	0.05	[5]
𝐷CPhy (day^−1)	Mortality rate constant of Cyanophyceans	0.005–0.2	0.145	[5]
𝐷Zoo (day^−1)	Mortality rate constant of Zoo		0.01	[5]
Conversion factors
𝑎nc (mgNmg^−1C)	Nitrogen to carbon ratio	0.15–0.25	0.1509	[15]