云南金沙江流域城市建成区核心度与人居自然环境质量耦合关系分析  

Analysis on the Coupling Relationship Between the Core Degreeof Urban Built-up Area and the Quality of Natural Environment of Human Habitation in Jinsha River Basin,Yunnan

作　　者：鄢垚 夏既胜[1] 王宇彤 YAN Yao;XIA Ji-sheng;WANG Yu-tong(School of Earth Sciences,Yunnan University,Kunming 650500,China)

机构地区：[1]云南大学地球科学学院,云南昆明650500

出　　处：《长江流域资源与环境》2023年第7期1521-1530,共10页Resources and Environment in the Yangtze Basin

基　　金：国家自然科学基金“云南金沙江流域不同地理环境下林窗动态演变及生态环境效应对比研究”(42061038)。

摘　　要：人居自然环境是人们生产生活的生态基础,城市建城区空间分布及其核心程度可以反映城市发展的规模及趋势,探究二者之间的耦合关系,有助于促进城市发展与环境保护同步协调。基于云南金沙江流域2010、2015、2020年的遥感影像和其他多源数据,从城市与自然协调可持续的角度,采用多指数融合计算城市核心度指数、多方法组合计算人居自然环境质量指数。通过阈值分割提取城市建成区核心度指数,进一步构建城市建成区核心度与人居自然环境质量的耦合协调度模型,计算二者的耦合协调度和发展差异度,将流域内城市建成区划分为9种类型,从时间和空间两个维度揭示其分异规律。结果表明:(1)流域城市核心度指数整体呈轻微下降趋势,核心度高值范围随时间逐渐扩大;人居自然环境质量指数缓慢上升,尤其是滇中地区表现明显。(2)城市建成区核心度与人居自然环境质量具有较强的空间关联度,历年耦合程度均高于0.8,表现为相互干预的耦合共同体。(3)二者的耦合协调度表现为:核心城区>边缘城区,南部城市>北部城市、中部城市>东西部城市,呈现出“中间高,四周低”的分布格局;总体协调度略有下降,高度协调范围随时间明显扩大。(4)地区自然、资源以及政策等因素的差异,影响了城市发展与生态环境之间的平衡关系,使得流域城市主要出现5种耦合协调发展类型。研究成果为流域内城市建成区合理发展和自然环境保护提供科学依据,得出的城市核心度指数和人居自然环境质量指数模型为开展类似研究提供参考。The natural environment of human settlements is the ecological basis of people’s production and life.The spatial distribution and core degree of urban built-up areas can reflect the scale and trend of urban development.Exploring the coupling relationship between the two will help promote the simultaneous coordination of urban development and environmental protection.Based on the remote sensing images and other multi-source data of Jinsha River Basin in Yunnan Province in 2010,2015 and 2020,from the perspective of coordinated and sustainable development of city and nature,the urban coreness index is calculated by multi-index fusion,and the human settlements’natural environment quality index is calculated by multi-method combination.The core degree index of urban built-up area is extracted by threshold segmentation,and the coupling coordination degree model between the core degree of urban built-up area and the quality of human settlements natural environment is further constructed.The coupling coordination degree and development difference degree of the two are calculated.The urban built-up areas in the basin are divided into nine types,and their differentiation rules are revealed from the two dimensions of time and space.The results show that:(1)The coreness index of watershed cities shows a slight downward trend as a whole,and the high-value range of core degree gradually expands with time.Human settlements’natural environment quality index rose slowly,especially in the middle reaches of the central Yunnan region.(2)There is a strong spatial correlation between the core degree of urban built-up area and the quality of human settlements natural environment,and the coupling degree is higher than 0.8 over the years.(3)The coupling coordination degree of the two shows core city>periphery city,southern city>northern city,central city>eastern and western city,showing the distribution pattern of‘high in the middle,low around’;the overall coordination degree decreased slightly,and the high coordination range e

关 键 词：金沙江流域 人居自然环境质量 城市核心度 耦合协调模型 时空分异 

分 类 号：X22[环境科学与工程—环境科学]