Ecological security pattern of land use in a typical transect of Hebei Province

The "Planning Outline of Hebei Xiong'an New District", which has been published recently in full text, states that it is necessary to adhere to the priority of ecological protection and build an ecological corridor taking in "Taihang Mountain Range-Bohai Bay", and "Jingnan Ecological Green Wedge-Juma River-Baiyangdian". In view of this, this paper referred to the principle and basis of land sample selection, laid out the typical sample belt of Hebei Province, and used the minimum cumulative resistance model, with the forest land, grassland and wetland of the sample belt as the ecological source land, and the artificial surface as the source of urban expansion. In terms of attributes and external attributes, five indicators-elevation, land landscape type, soil type, ecological sensitivity, and ecosystem service value-have been selected to investigate the ecological security pattern of land use. The findings were as follows:five ecological safety areas were designated for the typical sample area in Hebei Province; these were ecological core area, ecological buffer area, ecological transition area, ecological occupation area, and ecological management area. The spatial pattern distribution of ecological source areas and urban expansion sources showed clear boundaries, all of which were concentrated and contiguous, though the ecological connectivity was weak. The ecological core area, which was the core area of the nature reserve, was at least 1 082.42 km². The buffer area, which was the medium connecting the upper, middle and lower reaches, was as much as 6 943.63 km². This area should be used rationally for protection. The ecological transition area, which was the key area for the development and construction of the reserve following the urban and rural construction, was 3 189.25 km². The ecological occupation area, with an area of 5 835.34 km², was distributed in the ecological transition area and the ecological governance zone. It was the main area of urban construction and economic development. The ecological management area was 1 710.70 km²; it was primarily an ecologically fragile area and was a key region for ecological restoration and future ecological industry development. In summary, There should be a large-scale planting of the ecological core area and the ecological buffer zone. The ecological transition area should be controlled strictly to expand to the ecological land, and the ecological occupation area should be developed according to the needs of the urban population and the economy. It is necessary to return farmland to the lake to restore the water surface, strictly to the soil environmental safety bottom line, and optimize the ecological safety barrier system.