Acta Geographica Sinica ›› 1990, Vol. 45 ›› Issue (1): 41-55.doi: 10.11821/xb199001005

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Cai Yunlong   

  1. Department of Geography, Peking University
  • Online:1990-01-15 Published:1990-01-15

Abstract: Not one previous scheme of physico-geographical regionalization has divided China into the lowest regional units. An important cause of this is that the genesis theory, upon which the Pra- cedure of division "from top to bottom" is based, can suit only for analysis of larger-scale ter-restrial differentiation. This paper takes the procedure of grouping "from bottom to top" on the land classification map as a necessary supplement. Thus the scheme of physico-geogra-phical regionalization of China is implemented thoroughly in Guizhou province and the two kinds of research, i.e. land classification and physico-geographical regionalization, are integra-ted. Guizhou province is situated in the southwestern China. It has an area of 176636 sq km, which comprises 1.84 per cent of the whole land of China. Its climate belongs to monsoon type of plateau humid subtropical zone with more overcast and rain and less sunshine. Geomor-phologically it is an erosion karst plateau and has various types of landforms. It is rich in water and waterpower resources. Its soils are mainly yellow and calcareous types. It has the vegetation of evergreen broad-leaved forest with characteristics of lcarst habitat. Most part of the Guizhou province belongs to the Natural Region of Guizhou Plateau, and others to the Na-tural Region of Sichuan Basin and Natural Region of Yunnan Plateau respectively. The Gui-zhou Plateau Region can be divided into five subregions, i.e. the Northern Mountains and Gorges, the Eastern Mountains, and Hills, t:he Southern Low Mountains and Valleys, the Wes-tern Mountains and the Central Hilly Plateau. Every subregion comprises many natural areas which have a unique land structure. In Guizhou province, the main factors of land differentiation are pattern of basic land-forsm, elevation above see level, surface material and human activity. They comprehensively reflect geomorphology and soil-vegetation. According to these indexes and taking land system as mapping unit, five land types at the first order and seventy-eight land types at the second order can be distinguished. Then, ranges with relative identical land structure may be grou-ped into natural areas. Thirty two natural areas are grouped. "Chey are regrouped so that the boundaries of natural subregions and regions are. determined. Conforming to the development of economic situation of China, the application of physico-geographical regionalization ought to be expanded from "agriculture" to "regional develop-ment and territorial readjustment". This paper analyses features of natural resources and lo- canon conditions, compares them with prohlems of present development, and suggests the fu-ture development strategies for every subregions and areas.

Key words: land classification, land structure, physico-geographical regionalization, regional development, Guizhou province