Modelling Arsenic Transport In A River Basin:
A Case Study In Finland
Author(s)
Ä. Bilaletdin, H. Kaipainen, T. Ruskeeniemi & A. Parviainen
Abstract
Arsenic undergoes a number of changes in response to environmental conditions
such as pH, redox potential and other soluble compounds and solid phases
present in the system. As exact transfer modelling requires huge amounts of data,
a relatively simple calculation method is needed for large sites. A model has to
contain enough essential processes, state variables etc. but it should not require
too much data, and the running of the model should not be too laborious. This is
especially important for modelling tools designed to assist authorities in their
tentative environmental reviews.
The aim of this study is to develop a statistical arsenic transport model for
surface waters using monitored data and to take into account the discharge of
small rivers and the sub-catchments, calculated using a runoff model. Dilution,
sedimentation and chemical processes are presumable processes regarding
arsenic transport. The general form of the model is an advection-dispersion
model and the first order kinetics. The advection-dispersion model, separately
for particle bounded arsenic and soluble arsenic, has been used to simulate the
total arsenic concentration. The driving process for particle bounded arsenic is
sedimentation and the driving state variable for soluble arsenic is pH. The main
conclusion of this study is that by using a quite simple mass balance model it
was possible to simulate arsenic transport in surface waters for risk assessment
purposes.
Keywords: arsenic, transport model, RAMAS, surface water, advectiondispersion.
Keywords
arsenic, transport model, RAMAS, surface water, advectiondispersion.
Related Book
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