A study of saline freshwater interface phenomena in the Mahanadi delta region (Orissa)
The subsurface aquifer systems in Mahanadi delta region in Orissa (India) is largely characterized by two groups of freshwater aquifer systems, both of which are prone to saline water mixing/migration with time and development:
- The south western Mahanadi delta region is represented by unconfined to semi-confined freshwater aquifers underlained by brackish/saline aquifer systems with a diffusion boundary.
- The north eastern parts of Mahanadi delta is represented by deep freshwater confined aquifers overlained by brackish/saline water aquifers with aquitard/ aquiclude boundary.
This paper by SVN Rao (lead author) of DHI Group, incorporates results of a simulation study using a finite element based FEFLOW model and examines saline water migration scenarios when subjected to increasing rates of pumping under steady state conditions with the help of a calibrated groundwater model. The results indicate the unconfined and semi-confined aquifer systems in the south western part of Mahanadi delta are prone for faster rates of saline water mixing of the contamination when compared to the deep confined systems in the north eastern parts of Mahanadi delta.
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| Attachment | Size |
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Comments
2. A study of saline freshwater interface phenomena in the Mahanadi
Glad to note that you are willing to share data and information. The paper is a brief presentation. A more detailed paper including geophysical data is under review and publication in journal. One of my co-authors is a former scientist at NGRI (Dr Radhakrishna)who helped me get data and his experience for this study to be modeled.
Data limitations in terms of availability and model (numerical) approximations are always there and we have to live with that difficulty. Please let me know more about the study you are refering to. Could you send me related publication/ report etc.
S V N Rao
1. A comment on "Study of SW-FW interface in the Mahanadi"
Dear Author,
Happy to see your publication which is the most needy in assessing the water in terms of quantity and quality in the saline environment. The study certainly reflects the Saline-Fresh Water (SW-FW) interface with the limitations as expected with the data which is expected to represent the in-situ environment. It is expected that the present study will have limitations both in data acquisition and assumptions. These limitations can be minimized when the area is scanned with geophysical studies both surface and borewell logging. I made such studies in the eastern coast with the coverage around 800 sq.kms. The outcome was tested and accepted and implementing developmental activities accordingly.
I will be happy to share the view both to understand and to plan an effective strategies in minimizing the negative impact of SW-FW interface.
Looking forward for better networking and thus to create an healthy environment.
with thanks
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