Effects Of Tourism On The Spatiotemporal Variation Of Physical And Chemical Properties Of Soil On Tianchi Scenic Spot Of Xinjiang

With the help of natural environment and cultural conditions,xinjiang has become an indispensable core region in the development of the silk road.It not only promotes economic development,but also promotes the balanced development of surrounding areas.In the layout of tourist attractions,the cultural atmosphere and natural environment suitable for tourists’physical and mental health should be created by optimizing the environment.In order to make green tourism and ecological environment coordinate with each other,protection should be the primary task when tourism products are developed to meet the needs of tourists.However,with the increasing momentum of tourism,the development process also has an impact on the ecological environment in the scenic area.Such as grassland degradation,vegetation reduction,water pollution,etc.As the object of tourists’direct contact in tourism and sightseeing activities,soil will cause interference to the soil environment,and at the same time,soil will give feedback to the interference of tourism activities through the change of its physical and chemical properties.These feedbacks can be harmful to the health of visitors in some ways,such as the atmosphere.Paper for xinjiang tianshan tianchi scenic spot in the study area,respectively different years of two surface soil data and single soil profile data,and using chemical method of the integration of environmental magnetism method of test data of soil samples,with the analysis of GIS,the same time and space scales different heavy metal soil profile,magnetic parameters and mining are vertical distribution characteristics of magnetic parameters,explore the tourism activities under the influence of spatial and temporal variations of pollution condition in the study area analysis,the results show that:（1）The pollution status of heavy metals in the soil of Tianchi Tianchi Scenic Spot,As and Pb are within the safe range,and Zn,Cu,Ni,and Cr are within the warning range.The proportion of mildly polluted Ni,Cu,and Zn in 2017 was compared with 2015.The year has risen significantly.Comparing the two spatial distribution maps,it can be seen that the areas where the Ni and Cu pollution areas increase significantly are located in the tourist-intensive areas and parking lots,and the pollution areas in the resume mining distribution map increase.（2）The low coercive ferrimagnetic minerals（magnetite and maghemite）were predominated the magnetic materials and included some amount of anti-ferrimagnetic minerals（hematite and goethite）in topsoil samples,the magnetic mineral size of the two samples was mainly composed of pseudo-domain coarse particles and SP particles with relatively low content;The properties of magnetic minerals in the topsoil samples changed significantly with time,and the content and proportion of coarse particles in the secondary mining in 2017 were higher than that in 2015;As for the spatial distribution of magnetic mineral content in topsoil samples,the changing trend of the distribution maps in the two phases was similar.In 2015,the high value area was located in the core scenic spot area and the region in the southern part of lake.In 2017,the high value area expanded from the high value area in 2015 to the area around the lake.Moreover,the content in the core scenic spot area was increased;In addition to natural factors,being far away from pollution sources such as industrial areas and cities,the spatial and temporal differences of magnetic mineral content and grain size between the two times were mainly caused by the accumulation of magnetic pollutant particles input by tourism traffic activities in these two years;It was also found that monitoring the temporal and spatial changes of the magnetic parameters of the topsoils in the scenic spot was helpful to delineate the possible changes of pollution scope and identify the sources of pollutants.（3）The magnetic profile of soil profile in Tianshan Tianchi Scenic Area is different in different regions.The parameter values(χ_LF,Soft,SIRM,HIRM)of the profile samples in the traffic area are much higher than those in the boarding area,the green area and the control area.The district is affected by tourism activities.The soil profiles in the scenic area are dominated by low-coercivity ferrimagnetic minerals and contain incomplete antiferromagnetic minerals,which is similar to the conclusion of magnetic particles in topsoil.The vertical distribution changes mainly take two forms,in the 0³0cm traffic area The magnetic parameters of soil showed a significant increase trend,which may be the phenomenon of the downward migration of magnetic particles.Except that the soil in the traffic area contains almost no SP particles,the other three sections of magnetic minerals are mainly MD and SSD,accompanied by a small amount of SP particles.The decrease of superparamagnetic particles in the soil particles at the bottom of the four profiles is related to the properties of the parent rocks.