Study On Morphological Changes Of Territorial Border Land,and Security Prevention And Countermeasures

Frontier territorial security is related to the people's livelihood and well-being in border region.It will also have a profound impact on the long-term stability of the country and the integrity of territorial sovereignty.As the country's territory,the border region is naturally endowed with the dual significance of openness and guardianship.According to international law,the middle route of the main channel of the boundary river is usually the boundary line between the countries on both sides of the river.Due to the special nature of the transboundary river basin,once the types of land uses or ecological environment changes in the boundary river basin,it will directly affect the economic,social,environmental and even the national security of the two countries on both sides of the boundary river.In view of this,based on the remote sensing images of Beilun River(Dongxing Section)in 1966,2008,2013 and 2018,the historical archives of the Sino-Vietnamese borders,and the hydrological and social conditions of the researched site,and researched site the application of ArcGIS 10.2 data processing platform the author combined quantitative and qualitative analysis with mathematical statistics,dynamics of siltation extension and degree of river surface reduction to study the siltation,on the researched site,researched site the security impact on China territory due to the variation of siltation and the main waterway,the factors causing deposition and the countermeasures for the prevention and control of territorial security in China.The main conclusions are as follows:(1)The siltation surfaces of Beilun River(Dongxing Section)have expanded to different degrees in 1966,2008,2013 and 2018 among the 52 years,as well as the scouring or sediment deposition along the river banks on both sides,driving the bank line to shift slightly and the river area is also shrinking.According to the data statistics,charts and analysis,the main waterway and its middle line of the researched site are generally shifted from Mong Cai side of Vietnam to Dongxing side of China.The territory of China has been gradually lost and the territory in Vietnam is gradually expanding.(2)This paper explores the dominant impact of siltation in the researched site on China's homeland security,combined with the extension intensity of each siltation area in the researched siteresearched site with the reduction degree of rivers in the researched site,both of which are rising in general,and the speed and magnitude of land loss in China are continuously accelerating.Based on the climatic conditions,social conditions,historical archives and previous research results in the researched site,this paper explores the siltation in the researched site on China's territorial land.The hidden impact of security and the rapid spread of sedimentation in the researched site will also contribute to the illegal flames of border smuggling,accelerate the loss of territory at estuaries,and trigger territorial disputes.(3)The main factors causing sedimentation surface in Beilun River(Dongxing Section)are natural factors and human factors.The natural factors are mainly due to the climatic conditions in the researched site,and the sediment discharged from the upper reaches,which accumulates in the river bottom,the river bank and the original sedimentation surface.The human factor is mainly due to the inappropriate construction of the berm at the boundary river bank on Vietnamese side,such as the triangular berm built by the Vietnamese side at the Dongxing-Mong Cai branch of the Beilun River,while changing the main channel of the boundary river.The width of the river surface of the branching mouth is reduced,and these behaviors will accelerate the spread of the original siltation and increase the formation of new siltation.(4)This paper puts forward the countermeasures of territorial security prevention and control in five aspects: promoting the Sino-Vietnam embankment protection treaty,establishing the border river control project,delimiting the ecological red line of the border,compiling the coastal land planning and relying on advanced monitoring means.The countermeasures mainly include the construction of revetment along the boundary river between China and Vietnam,the siltation treatment in the boundary river,the dismantling of illegal revetment,the repair of damaged revetment,the active land supply for revetment construction and dynamic monitoring of the boundary river situation,and so on,so as to promote friendly reciprocity and harmonious coexistence between China and Vietnam.