长江河口存在着弱降解区（河流段）、强降解区（浑浊带区）和光合区（羽状锋区）；
The Changjiang river mouth can be divided into three regions: weak degradation (river section), strong degradation (TM ) and photosynthesis ( plume area).
在一些强冲积性河流特别是河口区，由于洪水或洪水和潮流共同作用，河床的冲淤变化十分剧烈。
Due to the effect of flood or flood and tidal currents, in some strong alluvial river particular in estuary, the erosion in riverbed is severe.
储集层沉积于水体动荡、氧化性强的过补偿环境，如冲积扇相、河流相、滨浅湖相、三角洲相、浊积扇相、风成相、浅海相等。
Reservoir formed in the turbulent and oxidized environment, for example alluvial fan facies, fluvial facies, delta facies, aeolian facies aad shallow-sea facies etc.
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