A Study of Ecological Security Assessment for Natural Reserve

2015 ◽  
Vol 1092-1093 ◽  
pp. 1081-1086
Author(s):  
Zhao Yan Diao ◽  
De Rong Su ◽  
Shi Hai Lv ◽  
Zhi Rong Zheng ◽  
Sheng Xing Ye ◽  
...  
Keyword(s):  
Landscape Pattern ◽  
Spatial Information ◽  
Ecological Security ◽  
Security Assessment ◽  
Ecological Safety ◽  
Topographic Map ◽  
Safety Index ◽  
Dynamic Changes ◽  
Natural Reserve ◽  
Safe Area

Based on TM remote sensing image and topographic map, the spatial information of landscape pattern was extracted in study areas in 1990, 2000 and 2010. With the principles and methods of landscape ecology, land use/cover change, ecosystem service values were selected to construct the ecological safety index which was used to quantitatively analyze the dynamic changes of landscape pattern and elucidated ecological safety status in study area. Result showed that During the 20 years from 1990 to 2010, as human factors interference increase, the farmland and construction land increased by 21.11% and 15.38% respectively, the grassland area is reduced by 27.57%.Cropland had an increased trend during the period of 1990 to 2010 period, The wood land and swamp land had an increased trend during the period of 1990 to 2000 area also, but reduced during from 2000 to 2010.From 1990 to 2010, the whole study area lied in the level of relatively safer, but the safe area was reduced the amount of 4967 ha during 2000 to 2010. The relatively safer land areas was increased first then reduced during the whole study period, the relatively non-safer level land and relatively safer level land areas were accounting for 10.81% and 2.92% of the total area respectively.

Ecological Safety Assessment in Hulunbeier Steppe Based on the Landscape Pattern

2013 ◽  
Vol 726-731 ◽  
pp. 1121-1129 ◽  
Author(s):  
Jun Jing Gao ◽  
Shi Hai Lv ◽  
Zhi Rong Zheng ◽  
Chao Yang Feng ◽  
Sheng Xing Ye ◽  
...  
Keyword(s):  
Landscape Pattern ◽  
Spatial Information ◽  
Landscape Fragmentation ◽  
Ecological Safety ◽  
Topographic Map ◽  
Safety Index ◽  
Continuous Increase ◽  
Construction Land ◽  
Fragmentation Index ◽  
Unused Land

Based on TM remote sensing image and topographic map, the spatial information of landscape pattern was extracted in Hulunbeier steppe in 1995, 2000, 2005 and 2010. With the principles and methods of landscape ecology, landscape fragmentation index, division index, dominance index and fragility index were selected to construct the ecological safety index which was used to quantitatively analyze the dynamic changes of landscape pattern and elucidated ecological safety status in study area. Result showed that the overall landscape tended to become fragmentized and complicated with the total number of patches increasing in the study area from 1995 to 2010. The ecological safety index of landscape types can be classified into four grades, grassland > unused land, wood land > water body, crop land > construction land. Overall, the regional ecological safety status got worse with the ecological safety index of natural landscapes decreasing and the ecological safety index of artificial landscapes increasing. In particular, the area of construction land had a continuous increase with a higher growth rate (7.41% per year during 2005~2010), which will be unfavorable to regional ecological safety as the biggest potential risk.

scholarly journals Landscape Pattern and Ecological Security Assessment and Prediction Using Remote Sensing Approach

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Pei Liu ◽  
Shoujun Jia ◽  
Ruimei Han ◽  
Hanwei Zhang
Keyword(s):  
Remote Sensing ◽  
Landscape Pattern ◽  
Response Pattern ◽  
Ecological Security ◽  
Security Assessment ◽  
Remotely Sensed Data ◽  
Landscape Type ◽  
Type Area ◽  
Status Assessment ◽  
Changing Trend

In this work, we present a processing chain for landscape pattern and ecological security status assessment and prediction based on cellular automata Markov (CA-Markov) and pressure status response pattern (PSRP) models using remotely sensed data (RSD) captured in 1986, 1996, 2006, 2016, and RSD simulated in 2026 over Zhengzhou city, Henan province, China. Three major findings can be withdrawn through the experiments. First, there is a significant changing of landscape type area, especially for building land. The area of building land is up to more than 5%, from 1986 to 2016. Secondly, the heterogeneity of landscape is increasing, and the diversity of landscape is becoming more and more diversifying and complex. Third, the changing trend of ecological security of Zhengzhou city shaped as decreasing and increasing gradually during the last 40 years. While the ecological security status, nowadays, appeared to a good trend by contrast of the previous stages. The predicted results with CA-Markov model show that the level of ecological security is still in moderate and has a trend of moving toward to the center in 2026.

Three Parallel Rivers World Natural Heritage Hongshan District Ecological Security Assessment

2012 ◽  
Vol 610-613 ◽  
pp. 673-676
Author(s):  
Hui Li ◽  
Si Qi Wang ◽  
Wen Xi Wang ◽  
Qiuchen Duan ◽  
Guo Yan Li
Keyword(s):  
Driving Forces ◽  
Image Interpretation ◽  
Safety Evaluation ◽  
Evaluation Index System ◽  
Security Level ◽  
Ecological Security ◽  
Security Assessment ◽  
Ecological Safety ◽  
Natural Heritage ◽  
World Natural Heritage

Hongshan district is a typical region in Three Parallel Rivers World Natural Heritage site of China. In recent years, human factors lead to series ecological security problems. Ecological safety assessment is an important basis to study regional ecological security situation. Using 2006 and 1990 time image interpretation data, we have built Driving forces- Pressure- State- Impact- Responses (DPSIR) model by GIS and structured ecological safety evaluation index system. Using Spss17 etc software and according to the weight and ecological safety factor calculation evaluated ecological safety in the area, and got the ecological security level space differences. The results show that three towns in the area 1990 to 2006 ecological safety evaluation, Gezan Village ecological security synthetical index reduced from 0.3335 to 0.4550, and the ecological security level dropped from 4 to 5, and in extremely insecurity state; Dongwang Village increased from 0.5252 to 0.5707, level keep 4, belong to quite insecurity state; Jiantang Township increased from 0.6438 to 0.6672, level keep 3, belong to insecurity state. We proposed ecological safety protection suggestions.

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.

Study on Urban Water Ecological Security Assessment

2013 ◽  
Vol 295-298 ◽  
pp. 829-832
Author(s):  
Wen Jie Xu ◽  
Wei Guo Chen ◽  
Xiao Ping Zhang ◽  
Hui Ling Gong
Keyword(s):  
Ecological Security ◽  
Urban Water ◽  
Security Assessment ◽  
Analytic Hierarchy ◽  
State Response ◽  
Comprehensive Index ◽  
Optimum Selection ◽  
The Index System ◽  
Hierarchy Process ◽  
Pressure State

Many natural, environmental, ecological and social economical indexes are involved for urban water ecological security assessment. The index system is built with the pressure-state-response model put forward by Organization for Economic Co-operation and Development. The comprehensive index weights are determined with improved analytic hierarchy process and entropy value method. The model based on fuzzy optimum selection theory is used. The application of this model in Jinan is given as an example. The results correspond basically with the reality.

Evaluation on Ecological Security of Land Resources

2013 ◽  
Vol 664 ◽  
pp. 129-132
Author(s):  
Sai Ming Yang
Keyword(s):  
Mathematical Models ◽  
Index System ◽  
Research Topic ◽  
Social Aspects ◽  
Sustainable Utilization ◽  
Ecological Security ◽  
Security Assessment ◽  
Land Resources ◽  
Ahp Method ◽  
Security Values

Ecological security is the basis of sustainable development.Ecological security assessment of land resources is a forefront research topic of sustainable utilization of land resources. A index system of twenty indicators on ecological security of land resources,including natural, economic and social aspects, is established. Using AHP method to determine the index weights and mathematical models to calculate ecological security values of land resources, Ecological security values of land resources are devided into five grades.

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