Dynamic Monitoring And Driving Forces Analysis Of Cultivated Land In Neijiang City Based On Remote Sensing And GIS

In addition to taking effective legal,administrative,economic and planning measures to ensure the balance of cultivated land,it can also monitor and understand the quantity and dynamic changes of cultivated land resources in real time through remote sensing technology.With the increasing process of urbanization,the change of cultivated land use type and quantity becomes the focus of land function supervision,and the application of remote sensing technology can monitor the dynamic change of cultivated land use in a timely,effective manner.In this paper,the dynamic changes of cultivated land resources in the urban area of Neijiang City from 2010 to 2016 were studied.The remote sensing image data of different phases and different sensors were used.The images were pretreated by ENVI software,and the preprocessing was carried out by remote sensing image data restoration,geometric correction,image cutting,image fusion and image enhancement.In the process of farmland information extraction,the commonly used image classification comparison method.In short,by selecting the spectral characteristics of the pixels representing the known sample areas(training areas)in order to obtain the parameters of each category in advance,by determining the mathematical function of each classification,and then according to the image feature classification to extract,then classified analysis and judgment.By extracting the information of cultivated land resources in 2010,2013 and 2016 in Neijiang city,and then using ArcGis to analyze and map the data of the city area.First,the data were analyzed by data classification.The results showed that the land use types in the Neijiang City were mainly cultivated land,and the cultivated land area in 2010,2013 and 2016 were 26544.30,26210.32 and 26036.10 hm2 respectively,and the number of cultivated land A decrease of 84.70 hm2.On the other hand,during the period from 2010 to 2016,the area of urban and rural areas increased significantly,with an area of 7213.35,7591.45 and 7793.93 hm2 respectively.All the cultivated land areas were transformed into the construction area,which was the inevitable trend of urban development.Secondly,the distribution characteristics of cultivated land and other resources in the middle reaches of Neijiang City in 2010,2013 and 2016 were mainly distributed in Lingjia Town,Yong'an Town,Baima Town and Chaoyang Town.Its distribution is characterized by concentrated contiguous distribution in the west and south,massive distribution in the north,sporadic distribution in the east and the surrounding areas of the town.During the study period,the driving forces of the change of cultivated land resources was mainly human factors,among which the influence of government policy,economic development,urban expansion and population growth was more prominent.In view of the salient problems in cultivated land use,the author puts forward the following suggestions:1.In view of the rapid reduction of cultivated land area,strictly control the occupation and construction of cultivated land,increase the obligation of cultivated land to supplement the index in each region,strengthen the land remediation,land reclamation,agricultural land remediation and industrial and mining waste land remediation efforts.The protection of the quantity and quality of cultivated land in many aspects.2.The appropriate development of barren hills and barren hills,and strict implementation of forest land,strengthen ecological construction.3.Measures to reduce the use of domestic water,industrial water and agricultural water for the reduction of water area.4.For the urban and rural residential areas and the sharp increase in industrial and mining land,the need to strictly control the urban construction land and reduce the rural residential land area to control the urban and rural residential areas and industrial and mining land growth.