Analysis of changes in flood regime using a distributed hydrological model: a case study in the Second Songhua River basin, China

作者：Wang, Mingyuan; Lei, Xiaohui^*; Liao, Weihong; Shang, Yizi

来源：International Journal of Water Resources Development, 2018, 34(3): 386-404.

DOI：10.1080/07900627.2018.1440538

• Flood regime
• change detection
• distributed hydrological model
• Second Songhua River basin
• EasyDHM model

This study proposes and tests a new approach to detect and analyze changes in flood regime using a distributed hydrological model (EasyDHM), using the Second Songhua River basin, China, as a case study. Model calibration and parameter sensitivity were used to represent flood regimes in a 60-year series (1954-2013), with three different flood regime periods identified. The changes in flood regime were estimated by model parameters, flood result residuals and the overall process in the hydrological model in the three periods. The results show that human activities significantly impacted flood regimes, with significant flood regime change largely attributed to increases in water storage in multiple small reservoirs. Flood volume was reduced significantly between the periods in all three watersheds. The parameters also changed in variety between the periods. The study highlights the importance of incorporating data on small-reservoir constructions in flood control systems.

• 出版日期2018
• 单位天津大学; 中国水利水电科学研究院; 流域水循环模拟与调控国家重点实验室