摘要
为解决城镇快速发展带来的用地矛盾和建设用地无序蔓延等问题,该研究以咸阳市为例,基于“双评价”技术方法划定城镇建设适宜区与不适宜区作为约束条件,在此基础上,引入PLUS模型模拟咸阳市2040年土地利用变化情况,最终划定并修正相对应的三重城镇开发边界。结果表明:1)咸阳市南部以城镇发展和农业生产为主,北部以生态保护为主,城镇建设适宜区面积为1368.98 km^(2),不适宜区面积为3853.04 km^(2)。2)PLUS模型模拟得到2040年城镇建设用地面积为133.86 km^(2),与未加约束的自然发展情景相比,未利用地面积明显减少,耕地、林地、建设用地等面积均有增加,有利于实现土地的高效利用。3)划定除城镇建设不适宜区外的底线城镇开发边界、由城镇建设适宜区构成的备用城镇开发边界、以及将2040年城镇建设用地作为范围的优先城镇开发边界面积分别为3863.39、852.28和134.84 km^(2)。该方法划定的城镇开发边界能够满足城镇动态发展的需要,有利于解决城镇发展、耕地保护、生态保护之间的矛盾,并为规划实践提供方法参考和决策依据。
Rapid urbanization has exerted the considerable pressure on land resources and infrastructure,leading to urban sprawl.The delineation of urban growth boundaries(UGBs)has been one of the most crucial tools to manage and curb the urban sprawl.The delineation can also be optimized to alleviate the land-use conflicts for the sustainable urban development.The second-largest city in Shaanxi Province,Xianyang City is similar to the most middle-sized cities in China,indicating the rapid development with the land-use conflicts and ecological crises.In this study,according to the"Dual-Evaluation"framework,the ecological protection areas of the high importance,the agricultural production and urban construction suitability areas were delineated.The"top-down"policy constraints were served as the delineation of UGBs.Concurrently,the patchgenerating land use simulation(PLUS)model was employed to conduct to meet the resource requirements and development potential in the study area.Future demands were forecasted and simulated for the land use.A"bottom-up"demand-driven approach was used to promote the rational use of land resources in the sustainable development of the environment.The delineation of UGBs was also in line with the local needs of actual development.Additionally,the erosion-dilation test was also employed to remove the noise points from the UGBs,particularly for the smoother and easier to manage.The results showed that:1)The southern region was predominantly focused on urban development,where the area of 1368.98 km^(2) was designated as the urban construction.Meanwhile,the northern was prioritized the ecological protection,where the area of 3853.04 km^(2) was unsuitable for construction.2)The PLUS model was used to simulate the urban construction land in 2040,which was 133.86 km^(2) under the constraints of suitability evaluation.Compared with the natural development scenario,there was a significant reduction in the unused land area,along with an increase in the areas of arable land,forest land,and construction land,in order to facilitate the efficient use of land.3)The erosion and dilation were integrated to exclude the unsuitable area for urban construction.The bottom-line UGBs was delineated as 3863.39 km^(2);The alternate UGBs was 852.28 km^(2),which was composed of the suitable urban construction zones;The priority UGBs was 134.84 km^(2) in the distribution range of urban construction land by 2040.The triple functional boundaries were established to promote the more compact and continuous urban pattern after morphological adjustments,thus guiding the direction of urban development.This approach can offer a novel perspective and scientific rationale to delineate the UGBs in the urbanization,in order to balance the development and protection.The conflicts among urban development,farmland protection and ecological conservation can also be determined to enable the coordinated development among population,resources and the environment.
作者
顾彤
张青峰
游政
李丁一
王诗雨
GU Tong;ZHANG Qingfeng;YOU Zheng;LI Dingyi;WANG Shiyu(College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,China;The First Institute of Photogrammetry and Remote Sensing,MNR,Xi'an 710054,China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2024年第14期210-220,F0003,共12页
Transactions of the Chinese Society of Agricultural Engineering
基金
陕西省农业协同创新与推广联盟项目(LMR202204)
陕西省自然科学基础研究计划项目(2021JZ-17)。
关键词
土地利用
城镇开发边界
PLUS模型
双评价
国土空间规划
land use
urban growth boundaries(UGBs)
PLUS model
dual-evaluation
territorial spatial planning
