Analysis of runoff and sediment variability and its causes in the upper reach of the Dang River

• Published in: Guanʻgai paishui xuebao Vol. 44; no. 8; pp. 125 - 135
• Main Authors: YANG Nini, NIU Zuirong, ZHANG Pengju, JIA Ling
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.08.2025
• Subjects: upper reaches of the danghe river; runoff sediment relationship; interannual variation; precipitation; attribution analysis
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2025057

【Objective】Understanding the variation in hydrological and sedimentary processes and the underlying mechanisms is essential for integrated watershed management, particularly in arid inland basins. As a major tributary of the Shule River, the Dang River plays a key role in water resource regulation in the Hexi Corridor. This study analyzes the long-term changes in runoff and sediment load in the upper reach of the Dang River and its underlying mechanisms. 【Method】The analysis was based on precipitation, runoff, temperature and sediment transport measured from 1972 to 2022. The variations in hydrological and sediment transport were examined using the Mann-Kendall trend test, the cumulative anomaly analysis, and the double mass curve method. A quantitative attribution analysis was used to assess the influence of climate change and anthropogenic activities.【Result】 ① Runoff and sediment transport showed strong seasonal variation, with their peaks occurring in July and August, primarily during spring and summer. ②