Impact of the urban landscape pattern in the Hangzhou Section of the Beijing-Hangzhou Grand Canal on the river aquatic environment

2021 ◽  
Vol 41 (13) ◽  
Author(s):  
李雪,张婧,于婉晴,范雅双,李小玉 LI Xue
2020 ◽  
Vol 47 (8) ◽  
pp. 1361-1379
Author(s):  
Chao Xu ◽  
Dagmar Haase ◽  
Meirong Su ◽  
Yutao Wang ◽  
Stephan Pauleit

In the context of rapid urbanization, it remains unclear how urban landscape patterns shift under different urban dynamics, in particular taking different influencing factors of urban dynamics into consideration. In the present study, three key influencing factors were considered, namely, housing demand, spatial structure, and growth form. On this basis, multiple urban dynamic scenarios were constructed and then calculated using either an autologistic regression–Markov chain–based cellular automata model or an integer programming-based urban green space optimization model. A battery of landscape metrics was employed to characterize and quantitatively assess the landscape pattern changes, among which the redundancy was pre-tested and reduced using principal component analysis. The case study of the Munich region, a fast-growing urban region in southern Germany, demonstrated that the changes of the patch complexity index and the landscape aggregation index were largely similar at sub- and regional scales. Specifically, low housing demand, monocentric and compact growth scenarios showed higher levels of patch complexity but lower levels of landscape aggregation, compared to high housing demand, polycentric and sprawl growth scenarios, respectively. In contrast, the changes in the landscape diversity index under different scenarios showed contrasting trends between different sub-regional zones. The findings of this study provide planners and policymakers with a more in-depth understanding of urban landscape pattern changes under different urban planning strategies and its implications for landscape functions and services.


2012 ◽  
Vol 209-211 ◽  
pp. 337-340
Author(s):  
Bin Xun ◽  
De Yong Yu ◽  
Yu Peng Liu

urbanization, land use, landscape pattern, landscape sustainability, Shenzhen Abstract. Urbanization has been a universal and irresistible trend across the world. Quantifying urban landscape pattern changes can provide detailed information to understand the urbanization process and to operationalize landscape sustainability. Combining the remotely sensed images and landscape metrics, we analyze the land use structure and landscape dynamics in a typical region of rapid urbanization in China—Shenzhen during the period of 1980-2010. The results showed that the dominant semi-natural and agricultural landscape has been fundamentally converted into the human-induced landscape. At the landscape level, the signatures of landscape dynamics exhibited a coalescence-diffusion-coalescence pattern. At the class level, the degree of fragmentation and shape complexity of four main land use types substantially increased.


2018 ◽  
Vol 7 (9) ◽  
pp. 340 ◽  
Author(s):  
Jianjun Lv ◽  
Teng Ma ◽  
Zhiwen Dong ◽  
Yao Yao ◽  
Zehao Yuan

With the acceleration of the process of building a national-level central city in Wuhan, the landscape pattern of the city has undergone tremendous changes. In this paper, remote images are classified through the neural network classification method, based on texture extraction, and the evolution of landscape patterns was quantitatively analyzed, based on the method of moving windows, landscape metrics and urban density calculation, in order to accurately extract landscape types and perform quantitative analyses. Wuhan City is taken as an example. The surface coverage of Wuhan City from 1989 to 2016 is divided into four types: agricultural landscape clusters, forest landscape clusters, water landscape clusters, and urban landscape clusters. It was concluded that, during the study period, the landscape heterogeneity of the entire area in Wuhan has increased, but the central urban area in Wuhan has decreased. The development of urban areas has compacted inwards but expanded outwards. In addition, the western part of Wuhan City developed better than the eastern part.


Author(s):  
Lina Tang ◽  
Hui Wang ◽  
Luyan Wang ◽  
Quanyi Qiu

2006 ◽  
Vol 21 (8) ◽  
pp. 1297-1309 ◽  
Author(s):  
Yichun Xie ◽  
Mei Yu ◽  
Yongfei Bai ◽  
Xuerong Xing

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