Urban dynamics, landscape ecological security, and policy implications: A case study from the Wuhan area of central China

Cities ◽  
2014 ◽  
Vol 41 ◽  
pp. 141-153 ◽  
Author(s):  
Kehao Zhou ◽  
Yaolin Liu ◽  
Ronghui Tan ◽  
Yan Song
Keyword(s):  
Policy Implications ◽  
Central China ◽  
Ecological Security ◽  
Urban Dynamics ◽  
Landscape Ecological ◽  
Wuhan Area ◽  
Landscape Ecological Security

Landscape ecological security pattern optimization based on the granularity inverse method: a case study in Xiuying District, Haikou

2015 ◽  
Vol 35 (19) ◽  
Author(s):  
陆禹 LU Yu ◽  
佘济云 SHE Jiyun ◽  
陈彩虹 CHEN Caihong ◽  
佘宇晨 SHE Yuchen ◽  
罗改改 LUO Gaigai
Keyword(s):  
Inverse Method ◽  
Ecological Security ◽  
Security Pattern ◽  
Landscape Ecological ◽  
Landscape Ecological Security

scholarly journals Landscape change patterns at three stages of the construction and operation of the TGP

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ruikang Li ◽  
Yangbing Li ◽  
Bo Li ◽  
Dianji Fu
Keyword(s):  
Landscape Pattern ◽  
Landscape Change ◽  
Ecological Security ◽  
Three Gorges ◽  
Temporal Characteristics ◽  
Landscape Type ◽  
The Three Gorges ◽  
Landscape Types ◽  
Landscape Ecological ◽  
Landscape Ecological Security

AbstractAnalyses of landscape change patterns that are based on elevation and slope can not only provide reasonable interpretations of landscape patterns but can also help to reveal evolutionary laws. However, landscape change patterns and their model in different landforms of the typical watershed in the Three Gorges Reservoir Area (TGRA) has not been quantified and assessed effectively. As a complex geographical unit, the ecological environment in the middle reach of the Yangtze River has experienced great changes due to the construction of the Three Gorges Project (TGP) and its associated human activities. Here, based mainly on a digital elevation model (DEM) and remotely sensed images from 1986, 2000, 2010, and 2017 and by using GIS technology, speeds/ trends of landscape change, the index of landscape type change intensity, landscape pattern indices, and landscape ecological security index, the spatial and temporal evolution characteristics of different elevations, slopes, and buffer landscape types were analyzed in typical watersheds, as well as an evolutionary model of the landscape pattern. The results indicated that (1) the landscape types along with the land classification and buffer zone that were influenced by the TGR construction have undergone a phased change, with the period 2000–2010 being the most dramatic period of landscape evolution during the impoundment period; (2) landscape type shifts from human-dominated farmland to nature-driven forestland and shrub-land as elevations, slopes and buffer distances increased. The landscape has shifted from diversity to relative homogeneity; (3) land types and buffer zones played essential roles in the landscape pattern index, which is reflected in the differences in landscape type indices for spatial extension and temporal characteristics. The results of this paper illustrate the spatial–temporal characteristics of various landscape types at three distinct stages in the construction of the TGR. These findings indicate that the landscape ecological security of the watershed is improving year by year. The follow-up development of the TGRA needs to consider the landscape change patterns of different landforms.

scholarly journals On The Sustainability Of Urban Institutional Dynamics: Capitalization, Decentralization, And The Case Of Two Alpine Cities

2011 ◽  
Vol 5 ◽  
pp. 24-37 ◽  
Author(s):  
Jon Marco Church ◽  
Nicolas Maisetti
Keyword(s):  
Policy Implications ◽  
Capital City ◽  
Institutional Dynamics ◽  
Urban Dynamics ◽  
Institutional Dimension ◽  
Urban Contexts ◽  
Urban Institutions ◽  
Centralization And Decentralization ◽  
Do So

The focus of this article is on the institutional dimension of urban dynamics, particularly on the twin processes of capitalization – defined as the transformation of a place into a capital city – and decentralization. We observe that they co-exist in several urban contexts. A study was conducted addressing the inherent level of sustainability for each configuration produced by the dynamics. This hypothesis was tested by performing a mental experiment to assess the consequences of the prevalence of one dynamic over the other. To do so, a case study was undertaken on two Italian Alpine cities – Turin and Bolzano – in order to empirically ground the experiment and compare the two conceptual models. From our analysis, both extreme centralization and decentralization seem unsustainable. The broader policy implications are clear: urban institutions must seek to control these processes by avoiding the extremes and mitigating their impacts.

Cultivated land landscape ecological security: Influencing factors and spatial differences in the hilly region of South China

2019 ◽  
Vol 39 (17) ◽  
Author(s):  
韩逸 HAN Yi ◽  
郭熙 GUO Xi ◽  
江叶枫 JIANG Yefeng ◽  
饶磊 RAO Lei ◽  
孙凯 SUN Kai ◽  
...  
Keyword(s):  
Influencing Factors ◽  
South China ◽  
Ecological Security ◽  
Cultivated Land ◽  
Hilly Region ◽  
Spatial Differences ◽  
Landscape Ecological ◽  
Landscape Ecological Security

Spatial-temporal differentiation and pattern optimization of landscape ecological security in the Ugan-Kuqa river oasis

2019 ◽  
Vol 39 (15) ◽  
Author(s):  
何珍珍 HE Zhenzhen ◽  
王宏卫 WANG Hongwei ◽  
杨胜天 YANG Shengtian ◽  
方斌 FANG Bin ◽  
张兆勇 ZHANG Zhaoyong ◽  
...  
Keyword(s):  
Ecological Security ◽  
Temporal Differentiation ◽  
Landscape Ecological ◽  
Landscape Ecological Security
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