Simulation Of Spatial And Temporal Variations
Of Dissolved Oxygen Of Baynespruit Stream In
South Africa
Author(s)
Muthukrishnavellaisamy Kumarasamy
Abstract
Water is essential for life processes of all species in the environment and for the
socio-economic development of the human community. Without proper water
quality, the life sustainability of many species is definitely doubtful. Pollutants
from various sources enter river systems and cause serious river water pollution.
In this situation, we need to understand how pollutants are transported along the
water course, the types and sources of these pollutants and their effects on water
quality. By understanding the water pollution and self-cleaning capacity of a
river system, one can make an appropriate decision for managing pollutant
disposal. While a non-conservative pollutant enters a water course, depletion of
dissolved oxygen (DO) takes place due to the consumption of oxygen in addition
to advection and dispersion. At the same time, depending on the deficit of DO,
re-aeration process takes place at a specific rate. There are many ways to solve
DO and non-conservative pollutant relationships, such as the Streeter–Phelps
model, many other concepts and experimental studies. The limitations of the
previous studies on DO are that they are primarily based on the advection
principle and first order decay only. In this study, considering first order decay
along with advection and dispersion, DO concentration has been simulated by
making use of mathematical mixing cells model incorporating de-oxygenation
and re-aeration. In order for the validation, the results of the proposed model are
compared with that of advection-dispersion based DO model. The spatial and
temporal distribution of dissolved oxygen concentrations of Baynespruit stream
in South Africa has been simulated having some input data and compared with
large set of dissolved oxygen data at various locations of the stream.
Keywords: dissolved oxygen, mixing cells concept, Baynespruit stream.
Keywords
dissolved oxygen, mixing cells concept, Baynespruit stream
Related Book
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