The local government should implement a more efficient pattern of groundwater use

Oct 13, 2025 by magicalceylontours.com 78 views

Seawater Intrusion Study Using Dipole-Dipole Configuration Resistivity Methods in the Lubuk Saban Village Area, Pantai Cermin District

Introduction

Coastal communities rely heavily on groundwater as a source of clean drinking water. However, the increasing use of groundwater in these regions has the potential to trigger seawater intrusion, which is the entry of saltwater into a freshwater aquifer. Lubuk Saban Village, Pantai Cermin District, is a prime example of this threat. To understand the subsurface structure and detect seawater intrusion, a geophysical study using the dipole-dipole configuration resistivity method was conducted in the region.

Background

Groundwater is a vital resource for coastal communities. However, the increasing demand for groundwater has led to concerns about seawater intrusion. Seawater intrusion occurs when saltwater from the ocean enters a freshwater aquifer, contaminating the water and making it undrinkable. This phenomenon is a significant threat to the sustainability of groundwater resources in coastal areas.

Lubuk Saban Village, Pantai Cermin District, is a region prone to seawater intrusion. The village's location near the coast and the increasing use of groundwater have created a high risk of seawater intrusion. To mitigate this risk, a geophysical study was conducted to understand the subsurface structure and detect seawater intrusion.

Methodology

The study involved 32 electrodes with a distance of 5 cm between each electrode. The electrodes were arranged in three paths along 155 meters. The pseudo-resistivity data obtained was then processed using Res2DinV VER 3.3G software to get the actual resistivity value.

The data analysis revealed a subsurface structure consisting of a layer of aquifer clay (alluvium) containing a little fresh water and mixed with sand (sandstone), gravel (crust), and sandstone. The maximum depth of the subsurface structure was 31.2 meters.

Results

The results of the study revealed the existence of seawater intrusion in the third track, with varying saltwater volumes. The most significant intrusion of seawater occurred in the first path, with resistivity values ranging from 1.08 to 4.12 Ωm. On the second path, seawater intrusion occurred slightly, with a resistivity value of 4.54 Ωm, which may be caused by a distance of measurement that is further than the coastline.

In the third path, seawater intrusion occurred very large and evenly in almost all measurement points, with resistivity values ranging from 0.512 to 3.74 Ωm. This phenomenon is allegedly triggered by the measurement location close to the coastline (44 meters) and because the location was once a pond area.

Discussion

The results of this study provide a real picture of the threat of seawater intrusion in Lubuk Saban Village. Analysis of subsurface structures and identification of seawater intrusion is very important to manage groundwater resources on an ongoing basis. This information can be the basis for the local government in taking prevention and mitigation steps, such as building a water filtering system, implementing a more efficient pattern of groundwater use, and maintaining the sustainability of watersheds.

Through a better understanding of seawater intrusion, we can protect vital water resources and ensure access to clean water for future generations. The study highlights the importance of geophysical methods in detecting seawater intrusion and managing groundwater resources.

Conclusion

The study demonstrates the effectiveness of the dipole-dipole configuration resistivity method in detecting seawater intrusion. The results of the study provide valuable information for the local government to take prevention and mitigation steps to protect groundwater resources. The study also highlights the importance of geophysical methods in managing groundwater resources and ensuring access to clean water for future generations.

Recommendations

Based on the results of this study, the following recommendations are made:

The local government should implement a more efficient pattern of groundwater use to reduce the risk of seawater intrusion.
A water filtering system should be built to protect groundwater resources.
The sustainability of watersheds should be maintained to ensure the long-term availability of clean water.

Future Research Directions

Future research directions include:

Conducting a more detailed study of the subsurface structure to better understand the mechanisms of seawater intrusion.
Developing a more efficient method for detecting seawater intrusion using geophysical methods.
Evaluating the effectiveness of prevention and mitigation measures to protect groundwater resources.

References

[1] Res2DinV VER 3.3G software. (n.d.). Retrieved from https://www.res2dinv.com/
[2] Dipole-dipole configuration resistivity method. (n.d.). Retrieved from https://en.wikipedia.org/wiki/Dipole-dipole_configuration_resistivity_method
[3] Seawater intrusion. (n.d.). Retrieved from https://en.wikipedia.org/wiki/Seawater_intrusion
Frequently Asked Questions (FAQs) about Seawater Intrusion Study Using Dipole-Dipole Configuration Resistivity Methods in the Lubuk Saban Village Area, Pantai Cermin District

Q: What is seawater intrusion?

A: Seawater intrusion is the entry of saltwater into a freshwater aquifer, contaminating the water and making it undrinkable. This phenomenon is a significant threat to the sustainability of groundwater resources in coastal areas.

Q: Why is seawater intrusion a concern in Lubuk Saban Village?

A: Lubuk Saban Village is a region prone to seawater intrusion due to its location near the coast and the increasing use of groundwater. The village's groundwater resources are at risk of contamination, which can have severe consequences for the local community.

Q: What is the dipole-dipole configuration resistivity method?

A: The dipole-dipole configuration resistivity method is a geophysical technique used to detect subsurface structures and identify seawater intrusion. This method involves arranging electrodes in a specific configuration to measure the resistivity of the subsurface.

Q: What were the results of the study?

A: The study revealed the existence of seawater intrusion in the third track, with varying saltwater volumes. The most significant intrusion of seawater occurred in the first path, with resistivity values ranging from 1.08 to 4.12 Ωm.

Q: What are the implications of the study's findings?

A: The study's findings highlight the importance of geophysical methods in detecting seawater intrusion and managing groundwater resources. The results of the study provide valuable information for the local government to take prevention and mitigation steps to protect groundwater resources.

Q: What are the recommendations based on the study's findings?

A: Based on the study's findings, the following recommendations are made:

The local government should implement a more efficient pattern of groundwater use to reduce the risk of seawater intrusion.
A water filtering system should be built to protect groundwater resources.
The sustainability of watersheds should be maintained to ensure the long-term availability of clean water.

Q: What are the future research directions?

A: Future research directions include:

Conducting a more detailed study of the subsurface structure to better understand the mechanisms of seawater intrusion.
Developing a more efficient method for detecting seawater intrusion using geophysical methods.
Evaluating the effectiveness of prevention and mitigation measures to protect groundwater resources.

Q: What are the benefits of the study?

A: The study provides a better understanding of seawater intrusion and its impact on groundwater resources. The study's findings can be used to develop effective strategies for managing groundwater resources and protecting the local community from the risks associated with seawater intrusion.

Q: What are the limitations of the study?

A: The study has some limitations, including:

The study was conducted in a specific location, and the results may not be applicable to other areas.
The study used a specific geophysical method, and other methods may be more effective in certain situations.
The study did not evaluate the effectiveness of prevention and mitigation measures.

Q: What are the future implications of the study?

A: The study's findings have significant implications for the management of groundwater resources in coastal areas. The study highlights the importance of geophysical methods in detecting seawater intrusion and managing groundwater resources. The study's findings can be used to develop effective strategies for protecting groundwater resources and ensuring the long-term availability of clean water.