Low land that is seasonally flooded ; has more woody plants than a marsh and better drainage than a bog .
季节性涨水的低地；比沼泽更多的树木植被，排水较沼泽容易些。
Effect of Returning the Crop Stack into Subsoil on Improving The Marsh Bog Soil and Drainage
秸秆心土还田改良沼泽化土壤排涝效果的研究
Marsh drainageMarsh drainageMarsh drainage