The delimitation of urban development boundaries plays an important role in optimizing the nation land space.“Double evaluation”is one of the important means to study and predict the scale of new construction land i...The delimitation of urban development boundaries plays an important role in optimizing the nation land space.“Double evaluation”is one of the important means to study and predict the scale of new construction land in the future and to determine the spatial distribution of urban construction land.This study combines the“double evaluation”with the FLUS(Future Land-Use Simulation)model to study the delimitation of the urban development boundary of Yichang.The results show that:(1)the“double evaluation”method comprehensively considers the carrying capacity of the resource environmental bear and the suitability of urban development;(2)the FLUS model can better couple the“double evaluation”method for Land Use/Land Cover(LULC)suitability evaluation,Land Use/land Cover Change(LUCC)simulation and urban development boundary delineation,and the overall accuracy of the simulation reaches 96%;(3)according to the requirements of relevant national policies,this study divides the urban development boundary of the study area into concentrated construction areas,elastic development areas and special purpose areas.This function-based division can meet the requirements of urban flexible development,ecological protection and urban safety.This research combines the FLUS model,which is widely used in the simulation of LUCC,with the double evaluation method used in China’s new round of land and space planning to obtain the result of the urban development boundary.This result is consistent with the existing plan of the study area.展开更多
Terrestrial carbon storage(CS)plays a crucial role in achieving carbon balance and mitigating global climate change.This study employs the Shared Socioeconomic Pathways and Representative Concentration Pathways(SSPs-R...Terrestrial carbon storage(CS)plays a crucial role in achieving carbon balance and mitigating global climate change.This study employs the Shared Socioeconomic Pathways and Representative Concentration Pathways(SSPs-RCPs)published by the Intergovernmental Panel on Climate Change(IPCC)and incorporates the Policy Control Scenario(PCS)regulated by China’s land management policies.The Future Land Use Simulation(FLUS)model is employed to generate a 1 km resolution land use/cover change(LUCC)dataset for China in 2030 and 2060.Based on the carbon density dataset of China’s terrestrial ecosystems,the study analyses CS changes and their relationship with land use changes spanning from 1990 to 2060.The findings indicate that the quantitative changes in land use in China from 1990 to 2020 are characterised by a reduction in the area proportion of cropland and grassland,along with an increase in the impervious surface and forest area.This changing trend is projected to continue under the PCS from 2020 to 2060.Under the SSPs-RCPs scenario,the proportion of cropland and impervious surface predominantly increases,while the proportions of forest and grassland continuously decrease.Carbon loss in China’s carbon storage from 1990 to 2020 amounted to 0.53×10^(12)kg,primarily due to the reduced area of cropland and grassland.In the SSPs-RCPs scenario,more significant carbon loss occurs,reaching a peak of8.07×10^(12)kg in the SSP4-RCP3.4 scenario.Carbon loss is mainly concentrated in the southeastern coastal area and the Beijing-TianjinHebei(BTH)region of China,with urbanisation and deforestation identified as the primary drivers.In the future,it is advisable to enhance the protection of forests and grassland while stabilising cropland areas and improving the intensity of urban land.These research findings offer valuable data support for China’s land management policy,land space optimisation,and the achievement of dual-carbon targets.展开更多
土地利用变化是生物多样性丧失的直接驱动因素之一。通过发展情景来模拟未来土地利用格局和生物多样性变化,可以指导生物多样性保护目标和政策的制定,成为决策的有力工具。本研究以浙江省陆域范围为研究区域,基于《昆明-蒙特利尔全球生...土地利用变化是生物多样性丧失的直接驱动因素之一。通过发展情景来模拟未来土地利用格局和生物多样性变化,可以指导生物多样性保护目标和政策的制定,成为决策的有力工具。本研究以浙江省陆域范围为研究区域,基于《昆明-蒙特利尔全球生物多样性框架》的空间规划、退化生态系统恢复、保护地3个行动目标,设定浙江省生物多样性保护目标和政策,参照“自然未来框架”的情景设计思路,制定了基线情景、美丽浙江情景和智慧浙江情景3套方案,其中基线情景强调按照现有发展趋势自然变化,美丽浙江情景强调保护自然生态系统的原真性和完整性,智慧浙江情景强调利用高科技提升大自然对人类良好生活质量的有益贡献。利用FLUS-Biodiversity模型模拟浙江省2035年、2050年土地利用格局与平均物种丰度指数(Mean Species Abundance,MSA)分布及变化,实现目标、政策与情景模拟的有机结合。结果表明:①2020年浙江省MSA指数为0.547,基线情景下城镇建设用地增长超过了城镇开发边界,挤占了生态空间和农田空间,导致生物多样性下降,2050年MSA指数降至0.535;而美丽浙江情景和智慧浙江情景扭转了这一下降趋势,2050年MSA指数分别增至0.624、0.573,生物多样性增加。②美丽浙江情景下,2035年生态保护红线面积占比达27.14%,新增范围主要分布在现有生态保护红线的外缘,有效保护了生物多样性。③美丽浙江情景和智慧浙江情景下,中度及以上干扰林地、中度及以上干扰湿地、干扰草地的受干扰程度将会变低,生物多样性因而提高。研究显示,权衡土地利用变化与生物多样性保护、实施生物多样性保护政策措施以及提升生物多样性治理能力和治理水平,可以有效提高生物多样性,实现生物多样性保护目标。展开更多
基金Natural Science Foundation of Hubei Province(No.2021CFB402)Key Laboratory of National Geographic Census and Monitoring,Ministry of Natural Resources(No.2020NGCMZD03)。
文摘The delimitation of urban development boundaries plays an important role in optimizing the nation land space.“Double evaluation”is one of the important means to study and predict the scale of new construction land in the future and to determine the spatial distribution of urban construction land.This study combines the“double evaluation”with the FLUS(Future Land-Use Simulation)model to study the delimitation of the urban development boundary of Yichang.The results show that:(1)the“double evaluation”method comprehensively considers the carrying capacity of the resource environmental bear and the suitability of urban development;(2)the FLUS model can better couple the“double evaluation”method for Land Use/Land Cover(LULC)suitability evaluation,Land Use/land Cover Change(LUCC)simulation and urban development boundary delineation,and the overall accuracy of the simulation reaches 96%;(3)according to the requirements of relevant national policies,this study divides the urban development boundary of the study area into concentrated construction areas,elastic development areas and special purpose areas.This function-based division can meet the requirements of urban flexible development,ecological protection and urban safety.This research combines the FLUS model,which is widely used in the simulation of LUCC,with the double evaluation method used in China’s new round of land and space planning to obtain the result of the urban development boundary.This result is consistent with the existing plan of the study area.
基金Under the auspices of the National Natural Science Foundation of China(No.41971219,41571168)Natural Science Foundation of Hunan Province(No.2020JJ4372)Philosophy and Social Science Fund Project of Hunan Province(No.18ZDB015)。
文摘Terrestrial carbon storage(CS)plays a crucial role in achieving carbon balance and mitigating global climate change.This study employs the Shared Socioeconomic Pathways and Representative Concentration Pathways(SSPs-RCPs)published by the Intergovernmental Panel on Climate Change(IPCC)and incorporates the Policy Control Scenario(PCS)regulated by China’s land management policies.The Future Land Use Simulation(FLUS)model is employed to generate a 1 km resolution land use/cover change(LUCC)dataset for China in 2030 and 2060.Based on the carbon density dataset of China’s terrestrial ecosystems,the study analyses CS changes and their relationship with land use changes spanning from 1990 to 2060.The findings indicate that the quantitative changes in land use in China from 1990 to 2020 are characterised by a reduction in the area proportion of cropland and grassland,along with an increase in the impervious surface and forest area.This changing trend is projected to continue under the PCS from 2020 to 2060.Under the SSPs-RCPs scenario,the proportion of cropland and impervious surface predominantly increases,while the proportions of forest and grassland continuously decrease.Carbon loss in China’s carbon storage from 1990 to 2020 amounted to 0.53×10^(12)kg,primarily due to the reduced area of cropland and grassland.In the SSPs-RCPs scenario,more significant carbon loss occurs,reaching a peak of8.07×10^(12)kg in the SSP4-RCP3.4 scenario.Carbon loss is mainly concentrated in the southeastern coastal area and the Beijing-TianjinHebei(BTH)region of China,with urbanisation and deforestation identified as the primary drivers.In the future,it is advisable to enhance the protection of forests and grassland while stabilising cropland areas and improving the intensity of urban land.These research findings offer valuable data support for China’s land management policy,land space optimisation,and the achievement of dual-carbon targets.
文摘土地利用变化是生物多样性丧失的直接驱动因素之一。通过发展情景来模拟未来土地利用格局和生物多样性变化,可以指导生物多样性保护目标和政策的制定,成为决策的有力工具。本研究以浙江省陆域范围为研究区域,基于《昆明-蒙特利尔全球生物多样性框架》的空间规划、退化生态系统恢复、保护地3个行动目标,设定浙江省生物多样性保护目标和政策,参照“自然未来框架”的情景设计思路,制定了基线情景、美丽浙江情景和智慧浙江情景3套方案,其中基线情景强调按照现有发展趋势自然变化,美丽浙江情景强调保护自然生态系统的原真性和完整性,智慧浙江情景强调利用高科技提升大自然对人类良好生活质量的有益贡献。利用FLUS-Biodiversity模型模拟浙江省2035年、2050年土地利用格局与平均物种丰度指数(Mean Species Abundance,MSA)分布及变化,实现目标、政策与情景模拟的有机结合。结果表明:①2020年浙江省MSA指数为0.547,基线情景下城镇建设用地增长超过了城镇开发边界,挤占了生态空间和农田空间,导致生物多样性下降,2050年MSA指数降至0.535;而美丽浙江情景和智慧浙江情景扭转了这一下降趋势,2050年MSA指数分别增至0.624、0.573,生物多样性增加。②美丽浙江情景下,2035年生态保护红线面积占比达27.14%,新增范围主要分布在现有生态保护红线的外缘,有效保护了生物多样性。③美丽浙江情景和智慧浙江情景下,中度及以上干扰林地、中度及以上干扰湿地、干扰草地的受干扰程度将会变低,生物多样性因而提高。研究显示,权衡土地利用变化与生物多样性保护、实施生物多样性保护政策措施以及提升生物多样性治理能力和治理水平,可以有效提高生物多样性,实现生物多样性保护目标。