滨海吹填土灌排工程改良效果研究

通过田间试验,对灌排工程改良措施改良滨海吹填土的效果进行了研究。结果表明,改良过程中排水工程从小区排出了大量的盐分,排出水矿化度从55.109g/L下降到5g/L左右。灌排措施下,300mm左右的淋洗水量能使0～40cm土层土壤脱盐率达到约65%,但不能使0～100cm土体整体脱盐;约700mm淋洗用水量能使0～100...

Effect of Leaching and Draining on Improvement of Dredger Fill

In the paper,the effect of leaching and draining technique on improvement of dredger fill was studied by field experiment.The results showed that,lots of salinity was moved from the experiment plot by drainage,and the mineralization degree of effluent dropped from 55.109 g/L to about 5 g/L at the period of reclamation.Desalination rate of 0~40 cm layer soil was about 65% with approximately 300 mm leaching water,but salt content of 0~100 cm layer soil did not decreased.Desalination rate of 0~100 cm layer soil was about 50% with approximately 700 mm leaching water,and the rate of 0~100 cm layer soil was above 71% with approximately 1 050 mm leaching water.The leaching curve was fitted,which showed the relation between soil desalting and irrigation water,and the fitting efficiency was very perfect.The research results proved that the leaching and draining technique was a successful measure to improve dredger fill.