snowmelt experiments Raw Experimental Data

This study presents novel insights into the mechanisms of NO3--N release during snowmelt in cold region slope-farmlands by systematically quantifying the effects of slope gradient and snow water equivalent on nitrogen transport dynamics. The research uniquely demonstrates preferential elution patterns where 50-60% of total NO3--N load is released during just the first 30% of runoff volume, establishing critical thresholds for nitrogen management. Our field experiments across multiple years reveal consistent relationships between slope characteristics, freeze-thaw cycles, and nitrogen release patterns that have not been previously documented in such detail. The study's significance extends internationally as agricultural non-point source pollution in cold regions represents a global environmental challenge, particularly as climate change alters freeze-thaw patterns. The validated predictive model developed through this research provides an essential tool for environmental managers worldwide to anticipate nitrogen flux dynamics and implement targeted mitigation strategies in snow-affected agricultural landscapes.