17:15 〜 19:15
[U03-P02] Analysis of Farmland Stock within Urban Areas
キーワード：Satellite Remote Sensing, Urban Agriculture, Land Use Changes Detection, Farmland Stock
With the rapid development of urbanization, the farmland area within Taiwan's urban planning agricultural regions and protected areas is limited. However, it continues to play a crucial role in food production, leisure and tourism, urban green space provision, and ecological conservation. In recent years, escalating challenges such as farmland conversion, abandonment, and illegal development have further threatened the sustainability of farmland and posed significant environmental challenges to urban areas.
Effective monitoring of farmland changes is critical for informed urban land management and policy planning. However, traditional ground survey methods are inherently time-consuming and labor-intensive. In contrast, satellite remote sensing provides a highly efficient alternative, enabling the rapid and cost-effective detection of large-scale farmland changes.
The technologies used in this study include multi-temporal satellite imagery from 2016 to 2023 and GIS technology, combined with auxiliary data such as land use surveys, Google Street View, aerial imagery, and farmland resource inventories. It interprets agricultural land use (Area B) within urban planning agricultural and protected zones (Area A) and calculates the "farmland stock ratio" using the formula (B ÷ A) × 100%. The ratio can be used to analyze the current status and trends of farmland use and changes in the urban areas.
This study analyzes farmland stock ratios across four regions in Taiwan. In northern Taiwan, a highly urbanized region, the farmland stock ratio has remained around 5% in Keelung City and New Taipei City over the years, while Taipei City has consistently maintained a ratio of approximately 17%. This reflects limited farmland availability and the impact of urbanization. Meanwhile, in Taoyuan City, the farmland stock ratio declined from 35% in 2017 to 29% in 2023, highlighting the growing impact of urbanization and residential development on farmland.
In contrast, in central and southern Taiwan, including Changhua County, Yunlin County, Chiayi County, and Pingtung County, the farmland stock ratio has generally remained above 50%, demonstrating stable agricultural development with minimal impact from urban expansion.
In eastern Taiwan, including Yilan County, Hualien County, and Taitung County, the farmland stock ratio exceeds 40%, suggesting lower development pressure and better farmland preservation.
As issues such as farmland conversion, idleness, and illegal development intensify, farmland within urban areas is continuously diminishing, adversely affecting the ecological environment and spatial planning. Ongoing monitoring of farmland stock is required to ensure an appropriate balance between urban development and farmland protection, and to prevent the uncontrolled reduction of agricultural land and the expansion of non-agricultural uses. In the future, this study recommends utilizing sub-meter satellite imagery for monitoring farmland, which will improve spatial resolution and accuracy This approach will facilitate a better understanding of changes in urban farmland use and support sustainable development.
Effective monitoring of farmland changes is critical for informed urban land management and policy planning. However, traditional ground survey methods are inherently time-consuming and labor-intensive. In contrast, satellite remote sensing provides a highly efficient alternative, enabling the rapid and cost-effective detection of large-scale farmland changes.
The technologies used in this study include multi-temporal satellite imagery from 2016 to 2023 and GIS technology, combined with auxiliary data such as land use surveys, Google Street View, aerial imagery, and farmland resource inventories. It interprets agricultural land use (Area B) within urban planning agricultural and protected zones (Area A) and calculates the "farmland stock ratio" using the formula (B ÷ A) × 100%. The ratio can be used to analyze the current status and trends of farmland use and changes in the urban areas.
This study analyzes farmland stock ratios across four regions in Taiwan. In northern Taiwan, a highly urbanized region, the farmland stock ratio has remained around 5% in Keelung City and New Taipei City over the years, while Taipei City has consistently maintained a ratio of approximately 17%. This reflects limited farmland availability and the impact of urbanization. Meanwhile, in Taoyuan City, the farmland stock ratio declined from 35% in 2017 to 29% in 2023, highlighting the growing impact of urbanization and residential development on farmland.
In contrast, in central and southern Taiwan, including Changhua County, Yunlin County, Chiayi County, and Pingtung County, the farmland stock ratio has generally remained above 50%, demonstrating stable agricultural development with minimal impact from urban expansion.
In eastern Taiwan, including Yilan County, Hualien County, and Taitung County, the farmland stock ratio exceeds 40%, suggesting lower development pressure and better farmland preservation.
As issues such as farmland conversion, idleness, and illegal development intensify, farmland within urban areas is continuously diminishing, adversely affecting the ecological environment and spatial planning. Ongoing monitoring of farmland stock is required to ensure an appropriate balance between urban development and farmland protection, and to prevent the uncontrolled reduction of agricultural land and the expansion of non-agricultural uses. In the future, this study recommends utilizing sub-meter satellite imagery for monitoring farmland, which will improve spatial resolution and accuracy This approach will facilitate a better understanding of changes in urban farmland use and support sustainable development.