Telecoupling cropland soil erosion with distant drivers within China.

Area of Science:

• Environmental Science
• Agricultural Economics
• Socioeconomics

Background:

• Soil erosion is influenced by both natural and human factors, with socioeconomic drivers being less studied than biophysical processes.
• Previous research focused on local socioeconomic impacts, overlooking how distant demands can drive regional soil erosion.
• Telecoupling effects, where distant economic activities impact local environments, have not been previously quantified for soil erosion.

Purpose of the Study:

• To quantify the contribution of China's cross-provincial economic demand to local soil erosion.
• To analyze these contributions at provincial, sectoral, and supply chain levels.
• To investigate the role of telecoupling in driving soil erosion.

Main Methods:

• Combined the Revised Universal Soil Loss Equation (RUSLE) with multiregional input-output analysis (MRIO) models.
• Quantified soil erosion contributions from inter-provincial economic demand.
• Analyzed impacts across different sectors and supply chain lengths.

Main Results:

• Significant soil erosion in southwest, northeast, and central China is linked to economic demands from other provinces.
• Agriculture and food processing are identified as key distant driving sectors.
• Household consumption drives erosion via shorter supply chains, while exports and capital formation drive it through longer chains.

Conclusions:

• Local soil erosion management must account for distant agricultural product demands.
• Coordinated national-scale food production and supply chains are essential for ecological land protection.
• Telecoupling effects represent a critical, yet understudied, factor in soil erosion dynamics.