Restoration of Ecosystems and Water Source Purification (Terraced Rice Fields, February 2003)

Restoration of Ecosystems and Water Source Purification (Terraced Rice Fields, February 2003)

Terraced rice fields, found in mountainous regions, have historically played a crucial role in Japan's agriculture and ecosystems. Due to their unique structure, terraced rice fields have a high water retention capacity, allowing rainwater to slowly infiltrate the soil rather than running off quickly. This gives them a water source recharge capability comparable to that of dams. As a result, they significantly contribute to local water resource management and flood prevention. However, in recent years,...

Importance of Conserving Terraced Rice Fields
Abandoned terraced rice fields, overgrown with vegetation, fail to retain water properly, leading to soil degradation and increasing the risk of floods and landslides. Furthermore, the loss of terraced fields diminishes their water source recharge function, potentially causing water shortages downstream and deteriorating river water quality. To address these concerns, efforts to preserve and restore terraced rice fields have become vital.

Contribution to Water Purification
Terraced rice fields naturally filter out pollutants by allowing water to slowly infiltrate the soil, contributing to the purification of groundwater and rivers. In particular, agricultural pesticides and chemical fertilizers, if not properly managed, can contaminate rivers and groundwater. However, terraced fields act as natural filters, preventing the release of these harmful substances into water sources.

Efforts Toward Restoration
In recent years, efforts to utilize terraced rice fields for eco-tourism and regional revitalization have been underway, with collaboration between local residents, government, companies, and NGOs. These efforts not only support agriculture but also contribute to ecosystem restoration and local water resource management. The use of terraced fields is expected to restore biodiversity in the region, balancing environmental conservation with economic development.