Modification of uncertainty analysis in adapted material flow analysis: Case study of nitrogen flows in the Day-Nhue River Basin, Vietnam

Material flow analysis (MFA) system for the Day–Nhue River basin. Dashed lines represent new nitrogen flows added after field observations. Note: livestock process (12) contains pig process (12a), poultry process (12b) and cattle process (12c) processes; field crop process (14) contains paddy (14a) and vegetable–fruit (14b).

Modification of uncertainty analysis in adapted material flow analysis: Case study of nitrogen flows in the Day-Nhue River Basin, Vietnam