Distribution characteristics of sediment in Wuliangsuhai Lake and its deposition health assessment

Based on the analysis of the distribution and characteristics of up-layer sediment in Lake Wuliangsuhai, its health status in terms of deposition rates were assessed. The results showed that: the distribution of deposition thickness significantly varied with sampling sites. These may be mainly controlled by the effects of landforms of the lake bottom, source of the sediment, hydrodynamic conditions, wind directions and speeds, aquatic vegetation etc. It deposited fluctuating larger in the southern area, relatively shallower in the northern, and less in the center and inlet area of the lake. Most of the areas in the lake are at the state of sub-healthy and un-healthy.