The government should continue to support farmers in expanding their land use and increasing agricultural production

Oct 13, 2025 by pynkocean.com 62 views

Analysis of Changes in Rice Fields in the Catchment Area of Lake Toba with Long-Distance Sensing Using the Supervised Method

Introduction

The catchment area of Lake Toba, located in North Sumatra, Indonesia, is a significant agricultural region, with rice being one of the primary crops grown in the area. The expansion of rice fields in this region has been a topic of interest for researchers and policymakers, as it can have both positive and negative impacts on the environment and the local community. This study aims to analyze the changes in rice fields in the catchment area of Lake Toba between 2013 and 2016 using long-distance sensing with the supervised method.

Methodology

The method used in this study is supervised classification, which involves utilizing Landsat satellite imagery 8. The research was conducted in the Computerized Laboratory and Geographic Information System of the Faculty of Agriculture, University of Sumatra North, from September 2017 to January 2018. The data used included Landsat 8 imagery on Path 128 ROW 58 and Path 129 ROW 58 for 2013 to 2016. Data processing was carried out using Quantum GIS (QGIS) software with image interpretation techniques using the maximum likelihood method.

Results

The results of this study showed a significant change in the area of rice fields in the catchment area of Lake Toba. In 2013, the total rice fields were recorded at 18,179.11 hectares, which increased to 19,637.8 hectares in 2016. This increase shows the addition of paddy fields in that period. In addition, total rice production in this area also increased, from 333,634.56 tons in 2013 to 337,546.43 tons in 2016.

Data Analysis

Seeing the data obtained, there is an indication that an increase in rice fields around Lake Toba can be influenced by various factors. First, government programs and agricultural policies that support the expansion of agricultural areas can be one of the main causes. The government's efforts to increase agricultural production and support farmers in expanding their land use can contribute to the growth of rice fields in the area. Second, the increase in farmers' awareness of the importance of sustainable agriculture and plant diversification also encourages this growth. As farmers become more aware of the importance of sustainable agriculture, they are more likely to adopt practices that promote the growth of rice fields.

Environmental Impact

In terms of the environment, this change in land use can also affect the ecosystem around Lake Toba. Therefore, it is essential to conduct further studies on the ecological impact of the expansion of this rice field area. For example, is there a risk of water pollution due to the use of fertilizers and pesticides that increase along with the increase in the area of rice fields? The expansion of rice fields can lead to the increased use of fertilizers and pesticides, which can pollute the water and harm the ecosystem.

Conclusion

Overall, this study shows that remote sensing using the supervised method is an effective tool in monitoring and analyzing changes in land use, especially rice fields. With a better understanding of this change, stakeholders, including the government and the community, can take more appropriate steps for sustainable agricultural management in Lake Toba's catchment areas. Further research is expected to explore more in social and environmental aspects related to changes in rice fields.

Recommendations

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

The government should continue to support farmers in expanding their land use and increasing agricultural production. This can be achieved through the implementation of policies and programs that promote sustainable agriculture and support farmers in adopting new technologies and practices.
Farmers should be educated on the importance of sustainable agriculture and plant diversification. This can be achieved through training and education programs that promote the adoption of sustainable agriculture practices and the use of plant diversification techniques.
Further research should be conducted on the ecological impact of the expansion of rice fields in the catchment area of Lake Toba. This can include studies on the effects of fertilizers and pesticides on the water and ecosystem, as well as the impact of the expansion of rice fields on the local community.

Limitations

This study has several limitations that should be noted. First, the data used in this study is limited to Landsat 8 imagery. While this data provides a good overview of the changes in land use in the catchment area of Lake Toba, it may not capture all the nuances of the changes in land use. Second, the study only analyzed the changes in rice fields between 2013 and 2016. Further research should be conducted to analyze the changes in rice fields over a longer period of time.

Future Research Directions

Based on the findings of this study, the following future research directions are suggested:

Conducting further research on the ecological impact of the expansion of rice fields in the catchment area of Lake Toba. This can include studies on the effects of fertilizers and pesticides on the water and ecosystem, as well as the impact of the expansion of rice fields on the local community.
Analyzing the changes in rice fields over a longer period of time. This can provide a more comprehensive understanding of the changes in land use in the catchment area of Lake Toba.
Exploring the social and economic impacts of the expansion of rice fields in the catchment area of Lake Toba. This can include studies on the effects of the expansion of rice fields on the local community, including the impact on employment, income, and living standards.

Conclusion

In conclusion, this study has shown that remote sensing using the supervised method is an effective tool in monitoring and analyzing changes in land use, especially rice fields. With a better understanding of this change, stakeholders, including the government and the community, can take more appropriate steps for sustainable agricultural management in Lake Toba's catchment areas. Further research is expected to explore more in social and environmental aspects related to changes in rice fields.
Q&A: Analysis of Changes in Rice Fields in the Catchment Area of Lake Toba with Long-Distance Sensing Using the Supervised Method

Q: What is the main objective of this study?

A: The main objective of this study is to analyze the changes in rice fields in the catchment area of Lake Toba between 2013 and 2016 using long-distance sensing with the supervised method.

Q: What method was used in this study?

A: The method used in this study is supervised classification, which involves utilizing Landsat satellite imagery 8.

Q: What data was used in this study?

A: The data used in this study included Landsat 8 imagery on Path 128 ROW 58 and Path 129 ROW 58 for 2013 to 2016.

Q: What were the results of this study?

A: The results of this study showed a significant change in the area of rice fields in the catchment area of Lake Toba. In 2013, the total rice fields were recorded at 18,179.11 hectares, which increased to 19,637.8 hectares in 2016.

Q: What are the possible causes of the increase in rice fields in the catchment area of Lake Toba?

A: The possible causes of the increase in rice fields in the catchment area of Lake Toba include government programs and agricultural policies that support the expansion of agricultural areas, as well as the increase in farmers' awareness of the importance of sustainable agriculture and plant diversification.

Q: What are the potential environmental impacts of the expansion of rice fields in the catchment area of Lake Toba?

A: The potential environmental impacts of the expansion of rice fields in the catchment area of Lake Toba include the risk of water pollution due to the use of fertilizers and pesticides that increase along with the increase in the area of rice fields.

Q: What are the recommendations of this study?

A: The recommendations of this study include continuing to support farmers in expanding their land use and increasing agricultural production, educating farmers on the importance of sustainable agriculture and plant diversification, and conducting further research on the ecological impact of the expansion of rice fields in the catchment area of Lake Toba.

Q: What are the limitations of this study?

A: The limitations of this study include the use of limited data and the analysis of changes in rice fields over a short period of time.

Q: What are the future research directions suggested by this study?

A: The future research directions suggested by this study include conducting further research on the ecological impact of the expansion of rice fields in the catchment area of Lake Toba, analyzing the changes in rice fields over a longer period of time, and exploring the social and economic impacts of the expansion of rice fields in the catchment area of Lake Toba.

Q: What are the implications of this study for sustainable agricultural management in the catchment area of Lake Toba?

A: The implications of this study for sustainable agricultural management in the catchment area of Lake Toba include the need for stakeholders, including the government and the community, to take more appropriate steps for sustainable agricultural management in the area.

Q: What are the potential applications of this study?

A: The potential applications of this study include the use of remote sensing technology to monitor and analyze changes in land use, particularly in areas with limited access to data and resources.

Q: What are the potential benefits of this study?

A: The potential benefits of this study include the provision of a better understanding of the changes in land use in the catchment area of Lake Toba, which can inform decision-making and policy development in the area.