Te Infuence of River and Lake Diver

Te Infuence of River and Lake Diversion. Net siltation occurred in the Dongting Lake region from 1960 to 2006, but the overall balance shifed to scouring from 2007–2015. In the Poyang Lake region, there was alternating siltation and scouring from 1960 to 1999, but from 2000 to 2015, there was a tendency for increased scouring (Fig. 7). Both lakes receive sediment scoured from upstream rivers15,32. Before construction of the TGR, the siltation and fooding capacity in the Dongting Lake area decreased, and the food discharge capacity of the main stream increased, but this did not lead to higher food levels at the same discharge. Sedimentation of the Luoshan–Hankou reach was the main cause of food level elevation at the same discharge15,32. Afer construction of the TGR, the trend towards increasing erosion in the Dongting Lake and Poyang Lake was reduced, the area fooded during the food season was reduced33, and the storage volume of the lakes was somewhat increased,