Application of GA-SVM for County Ecological Security Prediction of Land Resources

2018 ◽  
Author(s):  
Zhao Jing ◽  
Zhao Ziru
Keyword(s):  
Ecological Security ◽  
Land Resources

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.

Research about the Change of Land Resources Ecological Security Based on P-S-R in Chongqing City

2013 ◽  
Vol 726-731 ◽  
pp. 4797-4800
Author(s):  
Ai Qing Guo ◽  
Jing Wang ◽  
Ling Qin
Keyword(s):  
Index System ◽  
Ecological Condition ◽  
Land Resource ◽  
Sustainable Utilization ◽  
Ecological Security ◽  
Land Resources ◽  
Chongqing City ◽  
Ecological Problems ◽  
Security Index

In recent years, the land resource ecological problems become more and more serious. And the study on ecological security of land resources becomes the frontier problems on Sustainable Utilization of land resources. Based on P-S-R model, this paper built the land resource ecological security index system. And it studyed the land resource ecological security status of Chongqing city from 2001 to 2010.The results showed that land resources ecological security situation of Chongqing city has been improved in recent ten years, but the security situation is still not optimistic. It needs further take effective measures and improve the land resources ecological condition.

scholarly journals Regional Land Eco-Security Evaluation for the Mining City of Daye in China Using the GIS-Based Grey TOPSIS Method

Land ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 118
Author(s):  
Xinchang Zhang ◽  
Min Chen ◽  
Kai Guo ◽  
Yang Liu ◽  
Yi Liu ◽  
...  
Keyword(s):  
Regional Scale ◽  
Arable Land ◽  
Parameter Analysis ◽  
Central China ◽  
Security Evaluation ◽  
Ecological Security ◽  
Land Resources ◽  
Regional Environment ◽  
Mining City ◽  
Ecological Resources

Regional ecological security assessment is a significant methodology for environmental protection, land utilisation, and human development. This study aims to reveal the regional constraints of ecological resources to overcome the difficulties and complexities in quantification of current models used in land ecosystems. For this purpose, the technique for order preference by similarity to an ideal solution (TOPSIS) was linked to a grey relational analysis and integrated with a geographic information system. The obtained method was used to construct a land eco-security evaluation on a regional scale for application in a traditional mining city, Daye, in central China. Parameter analysis was introduced to the method to produce a more realistic spatial distribution of eco-security. Subsequently, based on the pressure–state–response framework, the eco-security index was calculated, and the carrying capacity of land resources and population for each sub-region were analysed. The results showed that: (i) very insecure and insecure classes comprised 5.65% and 18.2% of the total area, respectively, highlighting the vulnerable eco-environmental situation; (ii) moderate secure classes areas comprised a large amount of arable land, spanning an area of 494.5 km2; (iii) secure areas were distributed in the northwest, containing mostly water and wetland areas and accounting for 426.3 km2; and (iv) very secure areas were located on the southeastern region, involving traditional woodland with a better vegetation cover and an overall higher eco-environmental quality. In addition, for each sub-region, the extremely low and low ecological security areas were mainly arable and urban lands, which amounted to 305 and 190 km2, respectively. Under the current ecological constraints, sub-region 1 cannot continue supporting the population size in Daye City. The present results demonstrate the accuracy of our methodology, and our method may be used by local managers to make effective decisions for regional environment protection and sustainable use of land resources.

scholarly journals Spatio-Temporal Characteristics and Obstacle Factors of Cultivated Land Resources Security

2021 ◽  
Vol 13 (15) ◽  
pp. 8498
Author(s):  
Liejia Huang ◽  
Yue Feng ◽  
Boqing Zhang ◽  
Weiyan Hu
Keyword(s):  
Spatial Pattern ◽  
Hubei Province ◽  
Economic Security ◽  
Ecological Security ◽  
Cultivated Land ◽  
Land Resources ◽  
Upward Trend ◽  
The West ◽  
Temporal Characteristics ◽  
Spatio Temporal

The security of cultivated land resources is closely related to a country’s food security, economic security and social security, and as such is always the top priority of those responsible for the governance and administration of state affairs. The study area is 13 prefecture-level cities in Hubei Province. An entropy weight method, comprehensive index method, spatial analysis and obstacle degree model are employed to explore the spatio-temporal characteristics and obstacle factors of cultivated land resources in quantity, quality and ecological security. The study shows that (1) the security level of cultivated land resources in Hubei Province showed an upward trend between 2010 and 2019. The land resources’ quality and ecological security showed an upward trend, while quantity security showed a downward trend. (2) The security of cultivated land resources presents obvious spatial differences, generally showing a decreasing trend from west to east. Among them, quantity security presents a spatial pattern of being high in the central, low in the east and lower in the west of Hubei Province. Quality security presents a spatial pattern of being high in the central region and low in the east and west. Ecological security presents a spatial pattern of being high in the west and low in the east. (3) The main obstacles to its security in quantity, in quality and in ecology are obviously different. Finally, some countermeasures are put forward to ensure the security of cultivated land resources from the perspectives of quantity, quality and ecological security, and to assist with the implementation of different protection policies in the western, central and eastern areas of Hubei. This study expands the content and perspective of cultivated land resources security and has a certain novelty in the selection of the index of water resources per unit of land area, and the application of the obstacle degree model expands the research on the influencing factors of cultivated land resource security.

Nomadic Migration and Rural Violence in Nigeria

2020 ◽  
Vol 43 (1) ◽  
pp. 64-95
Author(s):  
Nsemba Edward Lenshie ◽  
Patience Kondu Jacob
Keyword(s):  
State Government ◽  
Migration Pattern ◽  
Land Resources ◽  
Focus Group Discussions ◽  
Group Discussions ◽  
Security Governance ◽  
North East ◽  
Descriptive Approach ◽  
The Relationship ◽  
Depth Interviews

The relationship between Fulani herdsmen and farmers has in recent years become hot-tempered motivated by competitive control of land resources, particularly in central and north-east Nigeria. In Taraba State, the ongoing nomadic migration pattern from the Sahel in quest of pastures has led to violent confrontation between Fulani herdsmen and farming indigenous natives. Using a descriptive approach consisting of documented evidence, in-depth interviews, and focus group discussions, the analysis revealed that conflicts between Fulani herdsmen and indigenous native farmers have culminated in population displacement and destruction of life and property in numerous rural enclaves in Taraba State. Despite the consequences of the conflicts, the Taraba State government was unable to act proactively because of the centralization of command over Nigerian security agencies. Accordingly, the study suggests decentralization of security agencies in Nigeria, especially the police, as the way forward for effective security governance in Nigeria.

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