Abstract:

In regions dominated by agricultural production,it has significant meaning to study the layout optimization of rural settlement based on farm radius.Based on the calculation model of improved farm radius and ArcGIS software,this thesis focused on quantitative analysis and the study of the farming pressure of rural settlements by adopting buffer zone and spatial analysis method.Policies of layout optimization were also pointed out.Firstly,this thesis analyzed spatial neighboring characteristics and quantity structure relations of rural settlement and farmland in Yongqiao district of Suzhou city.From the point of view of spatial neighboring characteristics,farmland and forestland were the closest land on structure and function in rural settlement in Yongqiao district of Suzhou city.Compared with forestland,farmland was the main element influencing the distribution of rural settlement.There was a good linear correlation between farmland area and the rural settlement area in each town.Secondly,Based on regular “Equal” method of calculating farm radius,this paper referred to the formula of farmland per capita,population and farm radius, and further derived the model calculating farm radius based on the “ratio of farmland and rural settlement”.This model shows that the square of farm radius had a direct ratio to the area of rural settlement.The experiment in Yongqiao district shows that the calculating method based on “ratio of farmland and rural settlement” solved the problems that rural settlement scale caused.Thirdly, this paper pointed out the conception and calculating method of farming press coefficient.The magnitude of farming press coefficient meaned farm per capita bore how many country labors,and its value was obtained through the ratio between buffer zone of rural settlement and farmland area.Based on “Equal” and “Ratio of farmland and rural settlement”,this paper calculated farm radius,formed buffer zone and drawed two farming pressure coefficient distribution map.Analysis showed that the method based on “ratio of farmland and rural settlement” was more practical on evaluating the reasonableness of the distribution of rural settlement.Fourthly,farming pressure coefficient distribution map had guiding meaning for the reasonable distribution of rural settlement.We should adopt different policy for rural settlement in different area with different farming pressure coefficient.The dismantlement of rural settlement in area with high farming pressure coefficient and construction in area with low farming press coefficient should be related together.The policy can ensure that the construction land will not increase,farmland will not reduce, the layout of rural settlement will be optimized.The study can help the layout optimization of rural settlement and increase of the benefit of tillage.The layout of rural settlement is also affected by nature,social economy,history and culture besides farmland.The future research direction is to put forward a comprehensive calculating model with the above elements.