The Spatial Reconstruction Of Land Use/Land Cover In The Early Reclaimed Time Of The Western Jilin Province

The historical period of land use and land cover change research will help us tocorrectly understand the essence of the relationship between human and land, and themechanism of harmonious development of human and the environment in thehistorical process， and provide an important reference for interpreting andunderstanding of the current land use and land cover conditions and forecasting futurechanges. Based on the remote sensing techniques, contemporary land use and landcover change monitoring and research has been made great progress, but the studyperiod is generally confined to the last50years.Therefore, in order to study the landuse and land cover change a longer time before, you need to use a variety ofinformation recorded in historical documents.In the past100years, western Jilin province occur a large-scale populationmovements and land reclamation process, is one of the regions in China has dramaticchanges in land use/cover. This change will have a profound impact on the regionalecological environment and the local climate, with important regional research value.And, for now, the land ecological problems of western Jilin Province is veryprominent, research the land use/cover change during history period, and rebuildingarable land and other land cover types in its reclamation process, can help us identifythe ecological environmental impact caused by land use changes, understand thehistory of the development process for reasonable guidance and arrangement of landecological restoration and construction work is of great practical significance.In this paper, based on the topographic maps, gazetteer, statistics, and otherhistorical data, rebuilding the land use/cover types in the study area in the1930smakes use of a comprehensive variety of methods, discussing deep the land use/coverdigital reconstruction of the reclamation early period when there is no remote sensingdata. Proved this land use/cover digital reconstruction method is feasible by analysisand comparison. Specific conclusions are as follows:(1) The increase of arable land in the region is due to the influx of immigrant reclamation.(2) The reclamation of arable land has a close spatial correlation with soil type,slope, population as well as the distance from the settlements.(3) Through correct and digital1:100000topographic maps of the1930s, theland use/cover types can be extracted: paddy field, dry land, orchards, meadows,rivers, urban land, rural land, wetlands, hardwood forest,(species unknown) forests,wastelands and lakes, and ponds. Which accounted for the largest area of the studyarea are wasteland, dry land, broad-leaved woodland and wetland.(4) Based on the impact of soil type, slope, population in the1930s and thedistance from the settlements on arable land, we enter the amount of cultivated land inthe1930s,, arable land and non-arable land space maps in the1950s into GEOMODmodel, and simulate a1930’s arable land and non-cultivated land space maps, but alsogenerates an arable land distribution suitability map. The model mainly reconstructionof arable land space distribution, the reconstruction results are ideal.(5) The main reason for land use change in the study area: With the enactment of“lifting a ban” policy from the government of Qing Dynasty, a large number of Hanpeople came here and brought their agricultural generation to the region, acceleratethe development of land. During the reclamation early period, the land use change ofthe study area is mainly affected by the policy, institutional and political factors,followed by the impact of natural disasters.