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.

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.

Study on Environment Resources with Assessment on the Sustaninability of Use of Land Resources in Hebei Province

2013 ◽  
Vol 788 ◽  
pp. 311-314
Author(s):  
Yan Na Zhao ◽  
Yu Qiang Sun
Keyword(s):  
Index System ◽  
Sustainable Use ◽  
Hebei Province ◽  
Evaluation Index System ◽  
Final Evaluation ◽  
Evaluation Index ◽  
Land Resource ◽  
Sustainable Utilization ◽  
Land Resources ◽  
Ahp Method

Land resource is an important part of environmental resources. In order to make better use of limited land resources, we should strengthen the evaluation of sustainable utilization of land resources. Firstly, This paper constructs land resource sustainable utilization evaluation index system of primary from two angles of quantity and quality . Secondly, we uses the AHP method to filter the index. Finally, we constructs the sustainable use of land resources final evaluation index system .

scholarly journals Investigation of ecological environment and assessment of ecological security in Tieshan Reservoir watershed

2022 ◽  
Vol 355 ◽  
pp. 02069
Author(s):  
Na Wang ◽  
Ying Wang ◽  
Zhan Liu
Keyword(s):  
Index System ◽  
Assessment Model ◽  
Security Level ◽  
Ecological Security ◽  
The Sustainable Development ◽  
Assessment Index ◽  
Green Tourism ◽  
Assessment Index System ◽  
Security Index ◽  
Reservoir Watershed

In this study, based on the “Driver-Pressure-State-Impact-Response” (DPSIR) assessment model, an assessment index system aming at the Tieshan Reservoir watershed was established from 4 aspects including social-economic impact, ecological subsystem, ecological service subsystem, regulation and management. Eighteen major items containing 55 indexes were selected in the assessment index system. Furthermore, the ecological security index (ESI) was calculated, and the deviation degree of reservoir ecological safety from the standard state was assessed. Results showed that ecological security index of Tieshan Reservoir watershed is 89, ecological security level is I , indicating security. The low security indexes of total phosphorus and total nitrogen were the major disadvantage factors that affected the ecological security of Tieshan Reservoir watershed, including rural life pollution and farmland runoff pollution. In addition, long-term mechanism of protection and development has not been formed yet, which also restricts the economic growth. Strengthening the formulation of laws and regulations on environmental protection, tamping the basic capacity building of water pollution control, developing ecological agriculture and green tourism are the important ways to improve the ecological security and realize the sustainable development of Tieshan Reservoir watershed.

scholarly journals Study on the Preparation and Properties of Impervious and Breathable Sand Based on Hydrophobic Theory

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5613
Author(s):  
Xiao Li ◽  
Xiong Zhang ◽  
Hao Ren
Keyword(s):  
Contact Angle ◽  
Hydrostatic Pressure ◽  
Air Permeability ◽  
Coating Material ◽  
Raw Material ◽  
Sustainable Utilization ◽  
Land Resources ◽  
Nano Structure ◽  
Material Content ◽  
Pressure Resistance

Land desertification, a severe global ecological and environmental problem, brings challenges to the sustainable utilization of land resources in the world. The purpose of this research is to use hydrophobic theory to prepare impervious and breathable sand, and to solve the problems of sandy soil that seeps easily and makes it difficult for vegetation to survive in desertified areas. The influences of coating material content, first-level and second-level rough structure on the impermeability and air permeability of impervious and breathable sand were studied. The research showed that, with the increase in coating material content, the impervious performance of the sample increased firstly and then decreased, and the air permeability rose continuously. The hydrostatic pressure resistance of the sample can reach an extreme value of 53 mm. The first-level rough structure of micron structure can greatly improve the hydrophobic performance, thus improving the impervious performance. The addition of micron calcium carbonate would improve the hydrostatic pressure resistance height of the sample to 190 mm. The sample would reach a superhydrophobic state in the condition of a first-level rough structure of a nano structure built by nano silica, and the contact angle was up to 152.0°, so that the hydrostatic pressure resistance height can rise to 205 mm. The best performance would be achieved under the condition of relatively less raw material with a second-level rough structure of micro–nano. At this point, the contact angle of the sample reached 152.8° and the hydrostatic pressure resistance height was up to 205 mm. At the same time, the air permeability index of the above four kinds of impervious and breathable sand met all planting requirements. The sample prepared can satisfy the demands of different degrees of impermeability and air permeability, and can be widely used in desertification control.

The Use of Geographic Information Systems (GIS) in Land Resources Appraisal

1994 ◽  
Vol 23 (4) ◽  
pp. 249-255 ◽  
Author(s):  
W.G. Sombroek ◽  
J. Antoine
Keyword(s):  
Land Use ◽  
Developing Countries ◽  
Information Systems ◽  
Geographic Information Systems ◽  
Land Degradation ◽  
Geographic Information ◽  
Land Resource ◽  
Land Resources ◽  
Training Support ◽  
Village Communities

Nations, village communities and individual land users need to make choices about land use in order to support development without risk of land degradation. Computerized land information systems (LIS) based on geographic information systems (GIS) have emerged as powerful tools for generating maps and reports to inform such decisions. Recently, FAO has been developing GIS/LIS systems in linkage with its agroecological zoning (AEZ) and other models, and using them to tackle issues of land, food and people at global, national and subnational levels. They have been successfully developed for land resource management at different scales, but practical difficulties have been encountered in making them accessible to the casual user in most developing countries, due to scarcity of data and poor training support.

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