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.

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 .

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.

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.

Sign in / Sign up

Export Citation Format

Share Document