From 2000 to 2002, the total depositional volume from HYK to GC was approximately 2.07×108 m3, except for the JHT - YXZ reach, and all other reaches displayed depositional patterns. During the trial operation stage of the XLD reservoir from 2000 to 2002, a large amount of sediment released from the reservoir was still transported to the floodplain and deposited in the different regions. After the XLD reservoir achieved full operation in 2002, three water-sediment regulation scheme (WSRS) experiments were conducted by the Yellow River Conservancy (YRCC) during the period from 2002 to 2005: July 4-15, 2002; September 6-18, 2003; and June 19 - July 13, 2004 (Hu et al., 2017). These three WSRS events led to full scouring along the downstream river channel, with a total erosion of 4.0×108m3 of the reach from HYK to GC during 2002-2005. Since 2005, the WSRS has been conducted annually by the YRCC to address downstream flooding, deposition problems, and other issues (Li & Sheng, 2011), and the cumulative erosion of the reach was approximately 9.54×108 m3between 2005 and 2017.