Comparative Analysis Of Spatial Differences In Typical Areas Of Heilongjiang

Seasonal frozen soil area accounts for more than 1/2 of the national land area,affecting people’s production and life.The study of seasonal frozen soil area is single,so this paper chose the monitoring point of Songling District in Daxinganling region and Harbin city monitoring sites as the research object of cold temperature automatic monitoring data,select the 2018-2019 freeze-thaw cycle,2019-2020 freeze-thaw cycle,2020-2021 draw freeze-thaw cycle period of permafrost development process line diagram,to study the monitoring points in the spatial differences.The results point out that:1.The instrument data of the device is accurate and is time saving,and can be installed in other seasonal frozen soil areas to provide data support for the study of frozen soil areas.2.During the freeze-thaw cycle period of 2018-2019,The freezing time the monitoring point of Songling District in Daxinganling region continues to reach 206 d,The maximum freezing depth is 232.8cm,Frozen time of monitoring point in Harbin City,Heilongjiang Province,104 d,The maximum freezing depth is 120.69cm;During the 2019-2020 freeze-thaw cycle period,The freezing time of the monitoring point of Songling District in Daxinganling region has reached 210 d,The maximum freezing depth is 231.75 cm,The freezing time of the monitoring points in Harbin City,Heilongjiang Province was 129 d,The maximum freezing depth is 119.82cm;During the freeze-thaw cycle period of 2020-2021,The freezing time the monitoring point of Songling District in Daxinganling region reached 224 d,The maximum freezing depth is242.33 cm,The freezing time of monitoring point in Harbin City,Heilongjiang Province was 130 d,The maximum freezing depth is 119.01 cm.By comparing the monitoring point of Songling District in Daxinganling region,the freezing degree is deeper and longer than monitoring point in Harbin City,Heilongjiang Province.Using the calculation formula of similarity,the frozen soil development process lines of the two monitoring points are highly similar,and their spatial differences are somewhat comparable.3.To study the influence of different buried depth on ground temperature,SPSS software is used to calculate Pearson correlation coefficient,Spear man correlation coefficient and Kendall correlation coefficient to verify the correlation between the two.Thus,it is concluded that the ground temperature of the monitoring point of Songling District in Daxinganling region and the monitoring points in Harbin city,Heilongjiang Province are both affected.4.Analysis of the influencing factors of the spatial difference between the monitoring point of Songling District in Daxinganling region and those in Harbin,Heilongjiang Province: the influence of snow cover,vegetation,temperature,etc.Among them,the collected temperature data are analyzed by mathematical methods: the temperature has a certain influence on the development of frozen soil at the monitoring point.