It is considered that the critical slope and steady slope can be formed for condition of characteristic flow during river closure of main channel.
认为在三峡大江截流特定的水流条件下，可以形成临界坡度和稳定坡度两种坡度。
TGP main river channel closure has such features as large discharge, deep water and high dumping intensity.
三峡工程大江截流，流量大、水深、抛填强度高。
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