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.