Identification Of The Effect Of Ground Water On The Level Of Landslide Vulnerability By The Geoelectric Method Of The Schlumberger Configuration (Case Study: Daulu Village, Berastagi District, Karo Regency)

by ADMIN 207 views

Understanding the Impact of Groundwater on Landslide Vulnerability: A Case Study in Daulu Village, Berastagi District, Karo Regency

Landslides are a significant threat to communities living in mountainous regions, causing loss of life, property damage, and displacement of people. The occurrence of landslides is often linked to the presence of groundwater, which can affect the stability of slopes. In this study, we investigate the effect of groundwater on landslide vulnerability using the geoelectric Schlumberger configuration method in Daulu Village, Berastagi District, Karo Regency.

Background and Significance

Landslides are a natural phenomenon that occurs when materials such as soil and rocks move downward due to gravitational force. The existence of groundwater in the earth plays a crucial role in this process, as it can affect the stability of slopes. Groundwater is water trapped in the pores of soil and rocks, and aquifers are formations that store large amounts of water. The interaction between groundwater and slope stability is a critical factor in determining the risk of landslides.

In Daulu Village, Berastagi District, Karo Regency, landslides are a recurring problem, causing damage to infrastructure and affecting the livelihoods of local communities. Understanding the impact of groundwater on landslide vulnerability is essential for developing effective strategies to mitigate this risk. This study aims to investigate the effect of groundwater on landslide vulnerability using the geoelectric Schlumberger configuration method.

Methodology

This study involved measurements at two sounding points, each with a length of 150 meters. Data taken in the field in the form of electrical potential values (V) and electric current (I) was processed using the IPI2Win application to produce a 1D cross-section. By conducting a correlation on a representative path, researchers can identify information related to aquifers, depth, and thickness of the soil.

The analysis of the 1D cross-section shows a layer that is suspected as an aquifer. The layer of soil and rocks that have the potential to become aquifers consists of sand and sandstone. At the point of Datum 2, the dominant layer is sand with a resistivity value between 734 to 983 ohm.m at a depth of 7.5 meters, while sandstone shows resistivity of 3109 ohm.m at a depth of 15.1 meters.

Results and Discussion

From the results of this interpretation, it can be concluded that the identified layer has the potential as a large enough aquifer. Through analysis, it was found that at the TU-1 research location, land movements were allegedly slow, so that it could be categorized as a type of devotional. Conversely, at the TU-2 location, the land movement is suspected to be fast, so it is included in the category of landslides. This shows the importance of an understanding of the interaction between groundwater and slope stability to anticipate the risk of landslides in the region.

Research Analysis and Relevance

This study not only provides important information about the existence of aquifers but also how environmental variables such as groundwater can affect soil stability. This information is very useful for infrastructure planners, the government, and the local community in efforts to mitigate natural disaster risk. By understanding the geological and hydrological conditions, preventive steps can be taken to reduce the impact of landslides, such as land management, water management, and development that pay attention to geotechnical aspects.

Conclusion

The geoelectric method Schlumberger configuration is proven to be effective in the identification and analysis of subsurface geological. In addition to accuracy in detecting aquifers, this method also provides a clear picture of the characteristics of existing soil layers, which can then be used for more sustainable development planning. Thus, this research is very relevant and makes a positive contribution to disaster risk management in mountainous and steep slopes as found in Daulu Village, Berastagi District.

Recommendations

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

  1. Conduct further research: Further research is needed to investigate the relationship between groundwater and landslide vulnerability in other regions.
  2. Develop early warning systems: Early warning systems should be developed to alert communities of potential landslides.
  3. Implement land management practices: Land management practices should be implemented to reduce the risk of landslides.
  4. Develop sustainable development plans: Sustainable development plans should be developed that take into account the geological and hydrological conditions of the region.

Limitations

This study has several limitations, including:

  1. Limited scope: The study was limited to a specific region and did not investigate the relationship between groundwater and landslide vulnerability in other regions.
  2. Limited data: The study relied on limited data and did not collect additional data to support the findings.
  3. Methodological limitations: The study used a specific methodological approach that may not be applicable to other regions.

Future Research Directions

Future research should focus on:

  1. Investigating the relationship between groundwater and landslide vulnerability in other regions.
  2. Developing early warning systems.
  3. Implementing land management practices.
  4. Developing sustainable development plans.

By addressing these limitations and future research directions, this study contributes to the development of effective strategies to mitigate the risk of landslides in mountainous and steep slopes.
Q&A: Understanding the Impact of Groundwater on Landslide Vulnerability

In our previous article, we discussed the importance of understanding the impact of groundwater on landslide vulnerability in mountainous regions. In this article, we will answer some frequently asked questions (FAQs) related to this topic.

Q: What is the relationship between groundwater and landslide vulnerability?

A: Groundwater plays a crucial role in landslide vulnerability. When groundwater is present in the soil, it can increase the weight of the soil, making it more susceptible to landslides. Additionally, groundwater can also affect the stability of slopes by eroding the soil and rocks.

Q: How does the geoelectric Schlumberger configuration method work?

A: The geoelectric Schlumberger configuration method is a non-invasive technique that uses electrical resistivity tomography (ERT) to image the subsurface geological structure. This method involves measuring the electrical resistivity of the soil and rocks at different depths, which can help identify the presence of aquifers and other geological features.

Q: What are the benefits of using the geoelectric Schlumberger configuration method?

A: The geoelectric Schlumberger configuration method has several benefits, including:

  • Non-invasive: This method does not require drilling or excavation, making it a non-invasive technique.
  • Cost-effective: This method is relatively inexpensive compared to other geophysical methods.
  • High-resolution imaging: This method provides high-resolution images of the subsurface geological structure.
  • Ability to detect aquifers: This method can detect the presence of aquifers, which is essential for understanding groundwater flow and recharge.

Q: What are the limitations of the geoelectric Schlumberger configuration method?

A: While the geoelectric Schlumberger configuration method is a powerful tool for understanding subsurface geological structure, it has several limitations, including:

  • Limited depth penetration: This method has limited depth penetration, which can make it difficult to image deep geological features.
  • Dependence on soil and rock properties: This method is dependent on the electrical resistivity of the soil and rocks, which can vary depending on the geological conditions.
  • Interpretation challenges: This method requires skilled interpretation to produce accurate results.

Q: How can the findings of this study be applied in practice?

A: The findings of this study can be applied in practice in several ways, including:

  • Land management: The study's findings can inform land management practices, such as identifying areas prone to landslides and implementing measures to mitigate the risk.
  • Water management: The study's findings can inform water management practices, such as identifying areas with high groundwater recharge and implementing measures to manage groundwater flow.
  • Sustainable development: The study's findings can inform sustainable development practices, such as identifying areas with high geological risk and implementing measures to mitigate the risk.

Q: What are the future research directions for this study?

A: Future research directions for this study include:

  • Investigating the relationship between groundwater and landslide vulnerability in other regions.
  • Developing early warning systems.
  • Implementing land management practices.
  • Developing sustainable development plans.

By addressing these FAQs, we hope to provide a better understanding of the impact of groundwater on landslide vulnerability and the role of the geoelectric Schlumberger configuration method in understanding subsurface geological structure.