Document Type
Paper
Start Date
15-10-2024 10:30 AM
End Date
15-10-2024 11:05 AM
Abstract
Rice trade has played a significant role in ensuring global rice consumption security. However, the spatial coupling of paddy fields based on rice trade can also transfer ecological environmental effects and threaten the sustainability of local systems. As the largest rice producer and consumer in the world, as well as one of the countries with the lowest per capita water resources, studying the inter-provincial rice flow in China and its water resource utilization efficiency is of great significance for ensuring national rice security and water resource security. Research has found that, China's rice consumption decreased by 11.97 Mt from 2000 to 2020, rice supply-demand relationship shifted from a state of shortage to one of surplus. The inter-provincial rice flow in China increased from 17.88 Mt to 46.51 Mt, Huang-Huai-Hai Plain (HHHP) and South China (SC) are the core rice inflow regions, while rice outflow from Northeast China Plain (NECP) continues to increase. The spatial coupled area of paddy fields in China increased from 3.15 Mha to 6.11 Mha. The types and areas of spatial coupling of paddy field between NECP and other agricultural regions showed an increasing trend. Affected by the decrease in per capita rice consumption, the actual and theoretical water consumption of paddy fields decreased by 24.03 billion m3 and 25.22 billion m3. The difference between actual and theoretical water consumption increased from 2.73 billion m3 to 3.92 billion m3, indicating that rice is being transferred from areas with low water resource utilization efficiency to those with high efficiency. The inter-provincial spatial coupling of paddy fields has resulted in an additional water resource consumption of 13.73 billion m3 in NECP.
DOI
10.5703/1288284317780
Included in
Natural Resources and Conservation Commons, Natural Resources Management and Policy Commons, Sustainability Commons, Water Resource Management Commons
Inter-provincial spatial coupling of paddy fields in China has accelerated the water consumption
Rice trade has played a significant role in ensuring global rice consumption security. However, the spatial coupling of paddy fields based on rice trade can also transfer ecological environmental effects and threaten the sustainability of local systems. As the largest rice producer and consumer in the world, as well as one of the countries with the lowest per capita water resources, studying the inter-provincial rice flow in China and its water resource utilization efficiency is of great significance for ensuring national rice security and water resource security. Research has found that, China's rice consumption decreased by 11.97 Mt from 2000 to 2020, rice supply-demand relationship shifted from a state of shortage to one of surplus. The inter-provincial rice flow in China increased from 17.88 Mt to 46.51 Mt, Huang-Huai-Hai Plain (HHHP) and South China (SC) are the core rice inflow regions, while rice outflow from Northeast China Plain (NECP) continues to increase. The spatial coupled area of paddy fields in China increased from 3.15 Mha to 6.11 Mha. The types and areas of spatial coupling of paddy field between NECP and other agricultural regions showed an increasing trend. Affected by the decrease in per capita rice consumption, the actual and theoretical water consumption of paddy fields decreased by 24.03 billion m3 and 25.22 billion m3. The difference between actual and theoretical water consumption increased from 2.73 billion m3 to 3.92 billion m3, indicating that rice is being transferred from areas with low water resource utilization efficiency to those with high efficiency. The inter-provincial spatial coupling of paddy fields has resulted in an additional water resource consumption of 13.73 billion m3 in NECP.