Evaluation of rural residential land consolidation classification and priority of Pinggu district in Beijing

Delineating rural residential land consolidation classification and the degree of priority zones is the basic work for land consolidation planning. Taking Pinggu district in Beijing as an example, the key factors were chosen for rural residential land consolidation classifying considering natural-environmental and socio-economic condition, and the rural residential areas were divided into 6 types by multi-factor limiting analysis and comprehensive suitability evaluation. Then, based on the farmland classification results, with the help of neighborhood-substitution method and buffer-recognition function of GIS, the potential of the supplying cultivated land grade in Pinggu was calculated. Furthermore, using cluster analysis method, the scheduling and layout of rural residential land consolidation were investigated. The results showed that the key point of rural residential land consolidation in Pinggu district should be eliminating ecological risks, advancing the overall development of rural cities and rural areas, ensuring the grain security. TheⅠandⅡclass rural residential land consolidated zones should be the priority areas in the near future, which will take the leading trend towards rural urbanization and village relocation; the Ⅲ and Ⅳ class rural residential land consolidated zones should be the suitable region in the medium and long term, which should be focused on collecting internal rural land and upgrading low-and medium-yield farmland surrounding village; and there was no need to consolidate the rural residential land in theⅤclass zone. The theory and results of the farmland gradation was tried to apply to rural residential land consolidation research, and the results can provide scientific instructions for land consolidation planning and new rural communities construction practice.