Spatiotemporal Change Analysis of Annual Average NDVI in Qinling Mountains as Ecological Security Barrier and Dividing Line between Geography and Climate

Land use land cover (LULC) transition analysis is a systematic approach that helps in understanding physical and human involvement in the natural environment and sustainable development. The study of the spatiotemporal shifting pattern of LULC, the simulation of future scenarios and the intensity analysis at the interval, category and transition levels provide a comprehensive prospect to determine current and future development scenarios. In this study, we used multitemporal remote sensing data from 1980–2020 with a 10-year interval, explanatory variables (Digital Elevation Model (DEM), slope, population, GDP, distance from roads, distance from the city center and distance from streams) and an integrated CA-ANN approach within the MOLUSCE plugin of QGIS to model the spatiotemporal change transition potential and future LULC simulation in the Greater Bay Area. The results indicate that physical and socioeconomic driving factors have significant impacts on the landscape patterns. Over the last four decades, the study area experienced rapid urban expansion (4.75% to 14.75%), resulting in the loss of forest (53.49% to 50.57%), cropland (21.85% to 16.04%) and grassland (13.89% to 12.05%). The projected results (2030–2050) also endorse the increasing trend in built-up area, forest, and water at the cost of substantial amounts of cropland and grassland.

Download Full-text

SPATIOTEMPORAL CHANGE OF URBAN AGRICULTURE USING GOOGLE EARTH IMAGERY: A CASE OF MUNICIPALITY OF NAKHONRATCHASIMA CITY, THAILAND

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-2-w13-1301-2019 ◽

2019 ◽

Vol XLII-2/W13 ◽

pp. 1301-1306

Author(s):

Y. Jantakat ◽

P. Juntakut ◽

S. Plaiklang ◽

W. Arree ◽

C. Jantakat

Keyword(s):

Urban Agriculture ◽

Land Development ◽

Temporal Analysis ◽

Rice Paddy ◽

Google Earth ◽

Field Crop ◽

Land Use Classification ◽

Change Analysis ◽

Entire Study ◽

Spatiotemporal Change

<p><strong>Abstract.</strong> Presently, urban agriculture (UA) is an important part of the urban ecosystem and a key factor that can help in the urban environmental management. Therefore, this paper studies a spatial-temporal analysis of UA areas and types in Municipality of Nakhonratchasima City (MNC), Thailand. This UA types referred land use classification system of Land Development Department (LDD). Google Earth images acquired in the years of 2007, 2011, 2015 and 2018 were used to examine UA change with segmentation-based classification method in QGIS to classify Google Earth images into thematic maps. Moreover, this study showed different spatiotemporal change patterns, composition and rates in the study area and indicates the importance of analyzing UA change. Therefore, the results of this classification consisted of eleven classes – abandoned paddy field, rice paddy, abandoned field crop, mixed field crop, cassava, betel palm, mixed orchard, coconut, rose apple, truck crop, and fish farm. Truck crop had the greatest cover in study area while floricultural covered the minimal space over periods of study. The UA change analysis over time for entire study areas provides an overall picture of change trends. Furthermore, the UA change at census sector scale gives new insights on how human-induced activities (e.g., built-up areas and roads) affect UA change patterns and rates. This research indicates the necessity to implement change detection for better understanding the UA change patterns and rates.</p>

Download Full-text

Ecological Security Research of the Northern Slope of Qinling Mountains under the Impact of Tourism Activities

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.955-959.1634 ◽

2014 ◽

Vol 955-959 ◽

pp. 1634-1639

Author(s):

Shi Dong Liu ◽

Jun Gao ◽

Wei Tao Pan

Keyword(s):

Evaluation System ◽

Positive Impact ◽

State Level ◽

Security Evaluation ◽

Security Level ◽

Ecological Security ◽

Qinling Mountains ◽

Northern Slope ◽

Regional Tourism ◽

The Impact

The ecological security of the piedmont area has been a focus in the research of mountain ecosystem. However, with the development of the urbanization, the research of mountain ecological security under the impact of human activities, especially in the city which near the mountain, the research of protection and development of piedmont area seems not updated enough. Therefore, this paper selected Northern slope of Qinling Mountains in Xi’an, and made tourism activities the major driving factor for ecological security of tourism environment in piedmont area, thus establishing an ecological security evaluation system of piedmont tourism environment, based on DPSIR Model. The result showed that tourism development would enhance the ecological security level of regional tourism environment, and tourism activities would exert positive impact on regional tourism environment. The conclusions include: (1) Before 2007, the tourist environment of Huxian had been in an unsafe state, but in 2013, the ecological security level was largely raised; (2)The tourism ecological security in Chang’an is higher than that in Huxian District, and the ecological security level had already got into the safe state level

Download Full-text

The Ecological Security Research of the Northern Slope of Qinling Mountains Based on the DPSIR Model

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1073-1076.438 ◽

2014 ◽

Vol 1073-1076 ◽

pp. 438-444 ◽

Cited By ~ 1

Author(s):

Shi Dong Liu ◽

Bin Rui Xue ◽

Jun Gao

Keyword(s):

Environmental Protection ◽

Human Activities ◽

Hot Spot ◽

Environmental Data ◽

Security Level ◽

Ecological Security ◽

Qinling Mountains ◽

Northern Slope ◽

Security Index ◽

The Government

Since the formal implementation of the Qinling Mountains protection strategy, the environmental protection of the Qinling Mountains has been gradually paid much attention by the government and other research institutions. Therefore, from different angles, to study the protection of the ecological environment of Qinling Mountains is currently becoming a hot spot of academic research. This paper takes the Northern slope of Qinling Mountains which have four administrative districts, and selected the DPSIR Model to analyze the ecological security index of the four districts to study the human activities impact on these areas, and chose the 2009 and 2013 economics and environmental data to establish the DPSIR Model. The results showed that with the sustainable development and environmental protection, the human activates have the positive influence on the Qinling Mountains. The conclusions include: (1)From 2009 to 2013, the ecological security index of four districts in the Northern slope of Qinling Mountains showed an increase tendency. (2)The ESI of Chang’an remained the safe status, Zhouzhi and Lantian remained the relatively unsafe status, but the ecological security level turned to relatively safe in Huxian. (3)Depends on the ESI study from 2009 to 2013, it showed that the human activities, especially the positive activities can upgrade the ESI level in the Northern slope of Qinling Mountains.

Download Full-text

Spatiotemporal change analysis of permanganate index in the middle and lower mainstem of the Yangtze River since 2004

Journal of Lake Sciences ◽

10.18307/2021.0413 ◽

2021 ◽

Vol 33 (4) ◽

pp. 1112-1122

Author(s):

Lan Jing ◽

◽

Wu Yunli ◽

Lou Baofeng ◽

Wang Ruilin ◽

...

Keyword(s):

Yangtze River ◽

The Yangtze River ◽

Change Analysis ◽

Spatiotemporal Change

Download Full-text

Remote sensing estimation of forage mass and spatiotemporal change analysis in the Beijing-Tianjin sandstorm source region, China

International Journal of Remote Sensing ◽

10.1080/01431161.2018.1523588 ◽

2018 ◽

Vol 40 (5-6) ◽

pp. 2212-2226 ◽

Cited By ~ 1

Author(s):

Yunxiang Jin ◽

Xiuchun Yang ◽

Zhemin Li ◽

Zhihao Qin ◽

Hongbin Zhang ◽

...

Keyword(s):

Remote Sensing ◽

Source Region ◽

Change Analysis ◽

Spatiotemporal Change

Download Full-text

Assessment of Qinling Forest Park’s Ecological Security Based on PSR Model - A case study of forest parks in Baoji section of the Qinling Mountains

E3S Web of Conferences ◽

10.1051/e3sconf/202018502013 ◽

2020 ◽

Vol 185 ◽

pp. 02013

Author(s):

Zuo Ying ◽

Cui Yan

Keyword(s):

Indicator System ◽

Ecological Security ◽

Qinling Mountains ◽

Security Risks ◽

New Era ◽

Forest Park ◽

Comprehensive Management ◽

Management Capacity ◽

Forest Parks

“Green growth” is a generalized trend of growth poles in the new era. Ecological security is essential to the forest park tourism. The assessment research on ecological security is significant for the development of forest park tourism. From the perspective of ecological security, this thesis selects seven forest parks in Baoji section of the Qinling Mountains as the research object, and builds the assessment indicator system of forest park ecological security according to experts’ comments. In this thesis, the PSR model is adopted to search indicators that slightly affect the security indexes of forest park; as a result,outstanding problems are found in the forest park according to current conditions, such as weak protection of forest landscaping and environment, large density of forest buildings, low comprehensive management capacity and poor guidance of forest ecological tour. The thesis has also probed the ecological security protection and development path of forest park in the Qinling region from the perspective of tourism carrying capacity control, landscaping design and building control, park ecological management system, and tourist civilized tourism according to the common security risks in forests, hoping to provide reference for the ecological security protection of other forest parks in Qinling region.

Download Full-text