中国人民解放军城西湖“五·七”军垦农场围湖造田,其地势低洼,土壤多属粘质淤土,其中过半为粘土中夹薄粉砂层的千层状淤土,水分上下运行受阻,且受机械压实,通透性很差。尽管排涝工程设施基本完备,但由于土壤内排水不良,降水积贮土中,不易消退, People’s Liberation Army City West Lake “five seven” reclamation farm reclaimed land around the lake, its low lying, mostly clay silt soil, of which more than half of clayey silt sand clayey silt, blocked up and down the water run, And by mechanical compaction, permeability is poor. Although drainage and drainage facilities are basically complete, due to poor drainage in the soil and precipitation accumulation in soil, it is not easy to dissipate.