Spiessl et al. Mathematically, a weighted arithmetic mean of the nodal concentration value C n [ML - 3 ] at conduit node n can be expressed as follows [ 33 ]:. Both the simulated chloride concentrations in some monitoring wells and the extents of chloride plume in the WKP are presented as follows. Chloride level is significantly affected by the application of sprayfields near the City of Tallahassee.
Simulation results and water quality measurements at two monitoring wells near the sprayfields are compared. Chloride levels continued to increase ever since. Chloride concentrations by simulation in those monitoring wells seem to be stabilized at high concentrations after to now, and also estimate to keep at this value till Input from the west boundary is a major chloride source, which also indicates very important groundwater inflow from the west.
Simulated results of chloride concentration distribution in the WKP by the CFPv2 and UMT3D solute transport numerical model at the ends of the years , and are discussed in this study. The concentration distributions at end of the model in as predictionare also included.
In the central of the study region, chloride plume area from the sprayfield also increased comparing with results. Chloride distribution in did not change much comparing with the distribution in the study region, indicated a relatively stable status. In other parts of the study region, chloride level also decreased from highest at the west boundary to lowest at east, which was similar to the distribution in Chloride concentration at Spring Creek Springs is still the highest in the whole study region.
The west part of study region still has higher chloride concentration than the east part. The CFPM1 is able to accurately simulate groundwater flow in karst aquifers. The simulated monitoring wells match well with the observations. Chloride concentration plumes are originated from the sprayfields and extended southward to Wakulla Springs.
Sprayfields in the south of Tallahassee and septic tanks in the rural area are the major source of chloride contamination in the WKP.
GROUNDWATER FLOW AND SOLUTE TRANSPORT MODELLING Research Papers - urknysmaclatchblok.ga
From the monitoring wells observation, chloride concentration started to increased, especially after the SEF sprayfield went into service in s and remained a high value in future prediction. Chloride contamination transported through the conduit network and formed extended plumes far away from the sprayfield.
The transport method modified the flow and solute transport within conduits and considered the exchange between conduits and matrix, generated more accurate simulation results due to more precise description of conduits in the model. Licensee IntechOpen.
Improved management of groundwater resources
This chapter is distributed under the terms of the Creative Commons Attribution 3. Help us write another book on this subject and reach those readers. Login to your personal dashboard for more detailed statistics on your publications. Edited by Muhammad Salik Javaid. We are IntechOpen, the world's leading publisher of Open Access books. Built by scientists, for scientists.
Our readership spans scientists, professors, researchers, librarians, and students, as well as business professionals. Downloaded: Abstract Numerical simulation of groundwater flow and solute transport in a dual-permeability karst aquifer is a challenging issue, since groundwater flow in karst conduit network can become non-darcian even turbulent flow.
Numerical simulation of groundwater flow in a karst aquifer 3. Flow modeling application The discharges into sinkholes were turned off in the simulation of Numerical simulation of solute transport in karst aquifer 4.
Governing equations of solute transport Solute transport modeling in a porous medium needs to solve groundwater flow advection, molecular diffusion and mechanical dispersion. More Print chapter. How to cite and reference Link to this chapter Copy to clipboard. Cite this chapter Copy to clipboard Bill X. Hu and Zexuan Xu July 27th Available from:.
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