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XX reservoirs with the operation, after the downstream river water discharged by the varying degrees of erosion, making the relationship between changes in the political arena. YY River on the middle reaches of the main controller XX hydrological data before and after the completion of statistical analysis, results show that, XX water after use, YY River flows under the river water level with the overall decline in three split ratio continued to decline in the river, the river gradually shrinking.

Scour: scour
Mid-stream: middle valley
Hydrology: hydrological
Water: Water Storage
Reach: reach
Flow: Flux
River: river channel
Jianghu relations: relations between river and lake

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Work with the fact that XX reservoir stores water, the channel segment accepts outwash to varying degrees under leaking the queen dam under Shimizu , change happened in feasible all corners of the country relation. XX establishes the statistic