基于ENVI的苏打盐渍土表层裂隙特征及与水盐运移关系的研究

通过野外定位观测和室内化验,探讨了现代水环境条件下微域尺度内苏打盐渍土表层裂隙的特征及与土壤表层积盐的关系.结果表明,小尺度内苏打盐渍化地区土壤水分和盐分再分配十分明显.碱性洼地在雨期是水分和盐分的汇集区,大量地表径流携带一定盐分汇集于碱性洼地.雨后连续干旱使碱性洼地成为微坡地和高平地水分和盐分的补给区,水分受水势梯度作用携带可溶性盐分侧向补给周边微高地.苏打盐渍土地区碱性洼地裂隙发育的过程中,同时伴随着土壤水分散失和盐分的再分配.近年来,松嫩平原西部土壤盐渍化迅速发展与水盐再分配密切相关.

Research on surface crack of sodic saline soil and the relation with soil water and salinity transportation based on ENVI

By in-situ observation and analysis in laboratory,surface crack of sodic saline soil in micro scale was characterized and the relation with soil salinity-accumulation was discussed in present hydrological environment.Results show that soil water and salinity re-distribution in small scale was quite obvious.Alkaline micro basin was the sink of water and salinity in rainy environment,where vast surface runoff carrying part salinity accumulated.Nevertheless,alkaline micro basin became source of water and salin...