1. Institute of Geographical Sciences Hebei Academy of Sciences/ Hebei Engineering Research Center for Geographic Information Application, Shijiazhaung 050011, China 2. Key Laboratory of Soil and Water Conservation and Desertification Control of Ministry of Education, College of Soil and Water Conservation,Beijimg Forestry University, Beijing 100083, China
Ecological land is connected with human social development and natural ecological succession based on the inherent correlation between land use and land cover. Studying the topographical differentiation of ecological land spatial-temporal pattern in Hebei Province can provide scientific basis for the protection and optimization of ecological land in Beijing-Tianjin-Hebei region. Based on land use data of Hebei Province obtained in 1990, 2000 and 2015, the authors used GIS technology to analyze the topographical differentiation of ecological land spatial-temporal pattern in Hebei Province. The conclusions are as follows: ① The advantageous distribution topographical types of ecological land are hills, low mountain and middle mountain, while the advantageous distribution topographical types of forest are low mountain and middle mountain, the advantageous distribution topographical types of grassland are hills, low mountain and middle mountain, the advantageous distribution topographical types of wetland are plains and plateau, the advantageous distribution topographical types of other ecological land are plains, platform and plateau. ② During the study period, the forest in the platform and the other ecological land in plain, platform, low mountain and mid-mountain landform types had extremely poor spatial stability. ③ According to the land use change TUPU, the stable type is the primary land use change type, accounting for 86.75% of the whole catchment. The low mountain and middle mountain are the advantageous distribution topographical types for the stability, while the plain, platform, hill and plateau are the advantageous distribution topographical types for the prophase kind, the plain, platform and plateau are the advantageous distribution topographical types for the anaphase kind, the plain, platform and hill are the advantageous distribution topographical types for the repetitive kind, and the plain is the advantage distribution topographical type for the constant kind. The topographical differentiation of ecological land distribution, spatial stability and TUPU are significant.
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