Xiongan New Area
Spatial distribution characteristics and construction occupancy zoning of cultivated land quality in Xiongan New Area
Transactions of the Chinese Society of Agricultural Engineering,Vol 34,No. 01
【Abstract】 Xiongan New Area was set up on April 1, 2017 and became a hot spot for scholars. This research aimed to distinguish the spatial distribution characteristics of cultivated land quality grade in the Xiongan New Area, so as to provide the scientific basis for construction land selection. This paper discussed the spatial distribution characteristics of cultivated land quality grade, and analyzed the characteristics and average grade of cultivated land quality at different spatial scales, as well as the spatial agglomeration characteristics of cultivated land quality grade, on the basis of cultivated land quality grade complement results and land use change database, using spatial statistical analysis of Arc GIS, area-weighted average method, mean dichotomy method, and partial autocorrelation method, and as a basis for the zoning of cultivated land occupied by construction land. The agricultural acreage of Xiongan New Area was 88 894.63 hm 2. This research showed that the quality of cultivated land in the New Area was distributed from Grade 6 to Grade 14, and the average grade was 9.42, slightly higher than that in Hebei Province. The deviation value of cultivated land was from −3.42 to 4.58, with the lower dispersion in north and east parts and higher dispersion in central and south parts of the New Area. The cultivated land quality showed the high positive correlation in spatial distribution, Higher aggregation type (LL type) was distributed in the northeast and southwest, and lower aggregation type (HH type) was distributed in the northwestern, eastern and southern parts of the region. There was no obvious concentration area of HL and negative correlation types (LH type). Based on the results of local spatial autocorrelation, the occupancy rule of arable land by construction land was made, and the priority occupancy area, reserved occupancy area, maintained area of cultivated land, and river system regulation and control area were delimited, which were the recommended cultivated lands occupied by construction land. The quality grade of cultivated land in the priority occupancy area was from 10 to 14, with the area of 40 981.03 hm 2, occupying 26.4% of the total area, mainly distributed in the northern part of the New Area, closer to Rongcheng and Xiongzhou Town. The quality grade of cultivated land in the reserved occupancy area was from 9 to 11, with the area of 57 304.07 hm 2, occupying 36.92% of the total area. The quality of cultivated land in the maintained area of cultivated land was from 6 to 9, with an area of 39 008.29 hm 2, occupying 25.13% of the whole area, mainly distributed in the northeast and south of the New Area. The river system regulation and control areas were mainly distributed around the Baiyang Lake, occupying 11.55% of the total area. Through the rationality analysis, the recommended partition result is considered to be credible. Based on these results, the paper suggests that the low grade cultivated land should be occupied in priority, and the high grade cultivated land should be protected.
Climate Change Projection over Xiong’an District and Its Adjacent Areas: An Ensemble of RegCM4 Simulations
Chinese Journal of Atmospheric Sciences,Vol 42,No. 03
【Abstract】 We investigate the future climate changes in the 21st century in the Xiong’an District, recently established by the Chinese government, and its surrounding areas in North China based on 4 sets of RegCM4 climate change simulations over East Asia under the mid-range RCP4.5 (Representative Concentration Pathway) scenario. The model is run at a grid spacing of 25 km, and driven by the global model simulations of CSIRO-Mk3-6-0, EC-EARTH, Had GEM2-ES and MPI-ESM-MR, respectively. Validation of the present (1986–2005) climate simulations is conducted first, followed by the ensemble projection of future changes along with the inter-simulation spread. Results show that the model can well capture both the spatial distributions of mean temperature and precipitation and their annual cycles. The model also shows a good performance in reproducing the temperature extreme indices of annual maximum value of daily maximum temperature (TXx) and annual minimum value of daily minimum temperature (TNn), and the precipitation extreme index of annual maximum 1-day precipitation (RX1day). Continuous warming and increases of TXx and TNn are found over Xiong’an District and its adjacent areas in the 21st century, indicating a warmer climate condition and more frequent hot spells in the future. With slight increases in mean precipitation, significant increases in RX1day with small inter-simulation spread are projected, indicating the intensification of precipitation extremes and more floods over the region. In the meantime, the greater increase in potential evapotranspiration compared to precipitation following the warming will lead to increases in water stress.
The output effects of labor force interregional transference and labor absorptive capacity of national new areas
Population & Economics,No. 02
【Abstract】 Based on international labor mobility theory and specific factor trade model, this paper constructed a theoretical framework of labor force interregional transference between national new areas and their neighbor regions. Using the panel data of provincial regions in Chinese mainland during1990–2015, this paper analyzed the output effects of labor transference caused by the national new areas through three econometric models based on C-D production function. This paper also calculated equilibrium scale of labor force and labor absorptive capacity of the national new areas of Pudong, Binhai and Liangjiang. The conclusions have been drawn as follows. First, labor transference between the new areas and their neighbor regions will promote both the productivity of national new areas and their neighbor regions. Second, more positive policies concerned on labor force should be adopted because of such a large labor absorptive capacity of national new areas.