TROPICAL GEOGRAPHY ›› 2018, Vol. 38 ›› Issue (3): 337-346.

### Geographical Detection of Regional Demarcation in the Nanling Mountains

WANG Yuying1，DONG Yuxiang1,2

1. WANG Yuying1，DONG Yuxiang1,2
• Online:2018-05-05 Published:2018-05-05

Abstract: The Nanling is the largest mountain system in the southern part of China, there is a certain dispute over whether it has a distinct regional demarcation effect, in that case the Geodetector, a new spatial analysis model to reveal the driving force behind it and can measure spatial diversity, can be used by choosing temperature, precipitation, vegetation type and soil type indicators to quantitatively identify the territorial boundaries of the Nanling mountains from the perspective of spatial heterogeneity, in order to get the contribution degree of different zoning indexes to the boundary of the Nanling Mountain area, and the geographical significance of the Nanling mountains can be more objectively and accurately understood. The results showed: 1) the Nanling mountain area has obvious regional demarcation, the highest q value reaches 0.99, the Within Sum of Squares (SSW) of the south of the mountains and the north of the mountains is far less than the Total Sum of Squares (SST), the spatial stratified heterogeneit of the two sides of the Nanling mountain region is significant. 2) Nanling regional difference is mainly reflected in the specific temperature, there are 5 indexes having the greatest contribution to the regional boundary of the Nanling Mountains, which are the average temperature of the coldest month, the annual mean minimum temperature, ≥10℃ accumulated temperature, the number of days when daily mean temperature ≥10℃ and the annual average temperature; The contribution of vegetation type, soil type and precipitation index to the regional demarcation of the Nanling mountain area is less than that of the temperature index, and their contribution degree decreased in turn. 3) The regional demarcation of the Nanling mountains has obvious seasonal difference. It is notable in spring, autumn and winter, but decreases in summer. In terms of precipitation, seasonal fluctuation is obvious, and it is significant in summer and autumn, and reaches its peak in November. The research results would have certain guiding significance for the areas south of the Nanling and north of the Nanling to carry out agricultural production and daily life in local conditions. At the same time, it also would provide a new way of thinking for the study of the boundary of other mountainous regions.