地理科学进展 ›› 2021, Vol. 40 ›› Issue (2): 207-219.doi: 10.18306/dlkxjz.2021.02.003
梁鑫源1,2, 金晓斌1,2,3,*(), 韩博1, 孙瑞1, 张晓琳1, 周寅康1,2,3
收稿日期:
2020-04-27
修回日期:
2020-06-01
出版日期:
2021-02-28
发布日期:
2021-04-28
通讯作者:
金晓斌
作者简介:
梁鑫源(1996— ),男,河南洛阳人,博士生,主要从事土地利用与国土整治。E-mail: 基金资助:
LIANG Xinyuan1,2, JIN Xiaobin1,2,3,*(), HAN Bo1, SUN Rui1, ZHANG Xiaolin1, ZHOU Yinkang1,2,3
Received:
2020-04-27
Revised:
2020-06-01
Online:
2021-02-28
Published:
2021-04-28
Contact:
JIN Xiaobin
Supported by:
摘要:
评估快速城市化地区的景观多功能性演变特征对于理解城乡发展转型下的资源配置与优化、制定合理的区域土地管理与规划政策至关重要。论文以长三角经济区中城市化进程最为突出的代表性城市——苏州市为研究区,选取居住承载、粮食供给、生境维持、水源涵养、气候调节与土壤保持6种景观功能指标,通过空间分析、SOFM网络模型等方法,基于1 km景观单元对区域景观多功能性的热点演变规律、权衡协同演化关系等进行分析。研究表明:① 受城市扩张影响,2000—2015年间苏州市景观多功能以居住承载功能的扩散态势为主,其他景观功能均呈现差异化缩减趋势,其中粮食供给与生境维持的功能弱化最为显著,且3种调节功能的空间分布特征存在一致性。② 随时间推移,苏州市景观多功能性逐渐增强,其高值区(>2)范围集中分布在林草地与耕地景观。在社会经济发展影响下,区域景观多功能性时空演变特征由强到弱并逐渐趋于稳定,演变热点区主要分布在乡村地区与城乡结合部,冷点区则以生态空间集聚为主。③ 景观多功能之间权衡与协同关系在研究期内的特征规律并未因时间序列演进表现出差异性,但权衡与协同程度存在波动性变化趋势。结合多功能权衡特征与多功能性热点变化规律,可在景观单元与乡镇行政单元上将苏州市划分出8类主导景观功能与4类城乡发展分区。整体而言,长三角快速城市化地区的景观多功能性优势呈“城市→近郊区→远郊区→乡村”的圈层式空间迁移过程,但多功能性映射出的土地利用多样化势必会导致更多的土地利用冲突问题,决策者应在多尺度时空耦合视角综合考虑景观管理或土地利用政策的设计与实施。
梁鑫源, 金晓斌, 韩博, 孙瑞, 张晓琳, 周寅康. 长三角快速城市化地区景观多功能性演变——以苏州市为例[J]. 地理科学进展, 2021, 40(2): 207-219.
LIANG Xinyuan, JIN Xiaobin, HAN Bo, SUN Rui, ZHANG Xiaolin, ZHOU Yinkang. Landscape multifunctionality change in rapidly urbanized areas of the Yangtze River Delta:A case study of Suzhou City[J]. PROGRESS IN GEOGRAPHY, 2021, 40(2): 207-219.
表1
景观多功能描述及计算方法"
景观功能 | 功能描述 | 应用模型 | 计算过程 |
---|---|---|---|
居住承载(RS) | 为人类生存需求提供居住空间的能力 | 基于土地利用数据的人口空间分布回归模型[ | pop是某模拟单元的人口总数,n是土地利用类型数量,ki是某模拟单元第i种土地利用类型系数,si是某模拟单元第i种土地利用类型的面积,b为常数项 |
粮食供给(GS) | 为人类生存需求提供粮食的能力 | 基于耕地与EVI的粮食产量空间分配模型[ | Gij是j乡镇i农田单元作物产量,Gj是j乡镇的总产量,EVIij是j乡镇i农田单元的EVI值,EVIsum,j是j乡镇的EVI总值 |
水源涵养(WC) | 为调节径流和河流流量的地块产水能力 | 生态系统服务和交易的综合评估模型(InVEST)[ | Yieldjx为产水量,j为某一土地利用类型,x代表某一栅格单元,ETmean,jx为平均实际蒸散发量,Rainx为年降雨量 |
生境维持(HM) | 提供适合于个体和种群生存条件的能力 | 生态系统服务和交易的综合评估模型(InVEST)[ | Qxj为土地利用类型j中的斑块组x的生境质量,Hj为土地利用类型j的生境适宜性,Dxj为土地利用类型j中栅格x的总威胁水平,z和k为比例因子(常数) |
气候调节(CR) | 通过储存和固持碳控制温室气体排放的能力 | 生态系统服务和交易的综合评估模型(InVEST)[ | Cj为土地利用类型j的碳储量,Cabove,j为植被地上碳库,Cbelow,j为植被地下碳库,Cdead,j为凋落物碳库,Csoil,j为表层土壤有机碳库 |
土壤保持(SR) | 减少水土流失和保持土壤养分的能力 | 修正的通用土壤流失方程(RUSLE)[ | A为土壤流失量,R为降雨及径流因子,K为土壤可蚀性因子,LS为坡度坡长因子,C为地表植被覆盖因子,P为水土保持措施因子 |
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