Опубликована: Ноя. 23, 2023

Retrogressive thaw slumps (RTSs) are becoming more common on the Qinghai-Tibet Plateau as permafrost thaws, but hydraulic characteristics of these have not been extensively studied. To fill this knowledge gap, we used ''space-for-time substitution method'' to differentiate three stages RTSs: original grassland, collapsing, and collapsed. Our study included on-site investigations, measurements, simulated analyses soil water characteristics, environmental factors, hydrological properties. findings show that measurements were highly consistent across RTSs, indicating accuracy V-G model in reproducing parameters for different RTSs. The grassland stage had highest retention content due its high SOM fine-textured micropores. In contrast, collapsed higher compared collapsing stage, primarily increased proportions micropores, content, lower bulk density (BD). Freeze-thaw cycles a significant impact texture structure resulting decrease an increase BD. However, absence compaction led subsequent accumulation organic matter, increasing content. Changes field capacity (FC), permanent wilting point (PWP), micropore distribution aligned with variations content.These highlight importance managing mitigate adverse effects freeze-thaw stability at Effective management strategies may include incorporating reducing compaction, maintaining optimal Further research is needed determine most suitable practices types conditions.

Язык: Английский