| The rapid development of the tourism industry has brought about remarkable social and economic benefits,but at the same time,it has also caused a certain degree of damage to the ecological environment.The scenic spots are far away from the industrial activity areas,and the scenic areas are mainly affected by the construction of tourist facilities in the scenic spots.The effects of artificial activities such as the transportation of tourist vehicles,the change of soil physical and chemical properties,is a reflection of disturbance of human activities.Magnetism is one of the physical and chemical properties of soil,and its changes can reflect the disturbance of man-made factors to the soil environment of scenic spots.However,the existing studies mainly focus on the urban soil,and there are few reports on the magnetic properties of the soils in tourist attractions.Therefore,the purpose of this study is to carry out systematic magnetic measurement and analysis of the samples of the topsoil along the road in the scenic spots.To explore its indicative effect on the pollution situation and the causes of the change in magnetic properties.This study takes the Tianchi and Kanas villages in Xinjiang as the research areas.Taking the surface soil along the road in scenic area as the research object,the magnetic parameters of the soil samples were measured systematically by using the environmental magnetics method,and the difference between the magnetic parameters along the road surface soil and the spatial distribution of the soil in the scenic spot was analyzed.?1?The content of magnetic minerals in the soil of the road cross-section of Xinjiang tourist scenic spot?Tianshan Tianchi?is lower than that of the farmland in urban and suburban areas,and the low coercivity subferromagnetic minerals?such as magnetite?are the main ones.There are a few incomplete high coercivity antiferromagnetic minerals.The particle size analysis of the magnetic minerals shows that the magnetic minerals are mainly multi-domain MD)and stable single-domain SSDs.Accompanied by a small amount of superparamagnetic fine particles,the analysis of variance of two factors in the magnetic parameters of Tianchi shows that there are significant differences between the magnetic parameters of soil samples at different positions of?LF?SIRM?SOFT??FD?SIRM/?LF?There were also significant differences between the magnetic parameters?LF?SIRM?SOFT?S-ratio of soil samples between different distances,which indicated that the transport of tourist vehicles had a significant effect on the magnetic characteristics of roads,the dust and exhaust gas produced by vehicles had a greater effect on the distance of 0.5m,but the effect on 5m was less.?2?The magnetic analysis of the surface soil samples along the Kanas road shows that the magnetic mineral content is higher than that of some urban topsoil,the magnetic bearing minerals are mainly low coercivity subferromagnetic minerals,the main minerals are magnetite,and the next are magnehemite.At the same time,there are a small amount of incomplete antiferromagnetic minerals and a small amount of superparamagnetic fine particles in the magnetic minerals,which are mainly composed of MD and PSD-SSD coarse particles.The spatial variation trend of magnetic mineral content parameter?LF?SIRM?SOFT is similar,with high values on the road leading to Hukou,respectively.Combined with the?FD analysis of particle size parameters,the magnetic particles in this high value area are relatively coarse.?3?During the peak tourist season,nearly 10,000 people travel in interval cars to and from scenic spots,and vehicle exhaust emissions,such as road dust,are ferromagnetic minerals in the input materials.The magnetic minerals along the highway contribute to the magnetic properties of the road and to the enrichment of the magnetic properties of the soil in the scenic spots.The results show that the ferromagnetic minerals in the scenic spots along the highway are higher and the artificial coarse particles are more. |
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