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. The 2017 Hanjiang autumn flood appeared to have higher surfacewater levels at the same discharge rate than previously at the Huangzhuanggauging station. It is seriously impacted the flood control. This paperanalyses the 2000–2017 data from the Huangzhuang reach in the HanjiangRiver, including surface water levels, the surface water fall,erosion-deposition variation and the engineering activities. A comparison ofthe 2016–2017 data with the 2000–2015 data in the Huangzhuang reach,revealed that the surface water levels were about 1.47 and 0.13 m higherin the high and intermediate discharge ranges, respectively. In the lowdischarge range, the 2016–2017 and 2010–2015 surface water levels weresimilar. However, a comparison of the 2016–2017 with the 2000–2009 data inthe low discharge range, shows that the surface water levels were 0.28–0.4 mlower. The surface water fall in the Zhuandouwan–Huangzhuang's reach decreased in 2016–2017 for discharges above5000 m 3  s −1 , whereas in the Huangzhuang–Datong reach theopposite was found. For other time periods and discharge ranges the falldecreased. In the Datong-Shayang reach the fall reduced in 2014–2015relative to other periods in 2000–2017 in the discharge range above5000 m 3  s −1 . The erosion-silting analysis for the Huangzhuang reach showedscouring of local river deposits due to bridge engineering. However, nearthe bridge the substantial silting was found. The collated surface waterlevel and scouring-silting data suggest that reduced surface water levelsduring low discharge are mainly due to the overall river erosion. Theincreased surface levels in the high discharge range are due to local riversiltation, especially because of the increased water resistance as responseto bridge engineering.

Analysis of water level variations in the Huangzhuang reach (Hanjiang River, China) during recent years