Relation of total dissolved gas supersaturation and suspended sediment concentration of high-dams

In order to resolve the issue concerning the relation of total dissolved gas (TDG)supersaturation and sus-pended sediment concentration of high-dams,a practical abatement measure for TDG supersaturation is put forward in this study.Based on a series of experiments,the production and release of TDG supersaturation in sediment laden flow are studied.The result shows that the production of TDG supersaturation remains almost the same level in either sediment laden flow or clear water for the same initial conditions.The rate of release of TDG supersaturation in sediment laden flow is significantly faster than that in clear water.The suspended sediment concentration can be increased through the use of bottom intakes,speeding up the release of TDG supersaturation.Such a measure can minimize the effect of TDG supersaturation on fish species in the downstream region of high-dams.