Desertification, soil salinization and grassland degradation are the major environmental hazards faced by the Gannan Plateau, northeastern Tibetan Plateau. Ecological risk assessment plays an important role in formula...Desertification, soil salinization and grassland degradation are the major environmental hazards faced by the Gannan Plateau, northeastern Tibetan Plateau. Ecological risk assessment plays an important role in formulating environmental management strategies yet little attention to this region. In this study, we established an ecological risk assessment index system based on 30 evaluation indices in the categories of hydrometeorology, ecological environment, ground surface disturbance, and society and economy for the Gannan Plateau. An entropy method was used to calculate an index weight,and subsequently the matter-element method was used together with extension theory to establish a matter-element extension model of ecological risk. We assessed the ecological risk in this region by calculating the degree of association between index layer, system layer and target layer, and the cumulative ecological risk index. The degrees of ecological risk for the counties of the region were determined by using Arc GIS which would represent a spatial heterogeneity of the risk grade in production. Our results showed that the areas of high ecological risk were in Zhouqu County and Zhuoni County, and others were of low risk(Hezuo City, Diebu County, Xiahe County and Lintan County) or intermediate risk(Maqu County). The results of the assessment were in accord with the actual observed situation. Thus, our ecological risk assessment index system is appropriate for this region and suggests that high risk counties need a priori ecological protection. Such research could provide a technological support which would potentially prevent or reduce disasters by establishing an ecological barrier to promote the sustainable development of Gannan Plateau.展开更多
Sanjiangyuan Area is located in Tibetan Plateau in Qinghai Province in China. It＇s the source of Yangtze River, Huanghe River and Lancangiiang River. Since the ecological environment became worse in recent decades, Q...Sanjiangyuan Area is located in Tibetan Plateau in Qinghai Province in China. It＇s the source of Yangtze River, Huanghe River and Lancangiiang River. Since the ecological environment became worse in recent decades, Qinghai government conducted an environmental migration project to move the herdsman out of Sanjiangyuan Area to protect the environment. Using the data we collected in five environmental migration resettlement villages in 2009 and the basic information of the nonmigrants, this paper calculated the index of migration differences to examine the selectivity between migrants and nonmigrants. The policy implication will also be discussed in this paper.展开更多
Xi Congratulates Scientists on Expedition to the Qinghai-Tibet Plateau Chinese President Xi Jinping sent a congratulatory letter to a research team on the second scientific expedition to the Qinghai-Tibet Plateau on A...Xi Congratulates Scientists on Expedition to the Qinghai-Tibet Plateau Chinese President Xi Jinping sent a congratulatory letter to a research team on the second scientific expedition to the Qinghai-Tibet Plateau on Aug.19.Xi expressed his congratulations and greetings to scientists,young students and support staff who joined the country’s second comprehensive scientific expedition to the plateau.He noted that the expedition will promote the plateau’s sustainable development and the world’s ecological environmental protection.展开更多
基金supported by the Soft Science Project of Gansu province(1504ZKCA090-1)the National Natural Science Foundation of china(grant nos.41671516,41701623,51369003)+2 种基金the Foundation for Excellent Youth Scholars of NIEER,CAS,National Natural Science Foundation of China(Grant No.41661144046)supported by the Special Foundation for Gansu Province International Scientific Cooperation(1604WKCA002)the Fundamental Research Funds for the Central Universities(lzujbky-2015-K10,lzujbky-2016-862516,lzujbky-2017-it90)
文摘Desertification, soil salinization and grassland degradation are the major environmental hazards faced by the Gannan Plateau, northeastern Tibetan Plateau. Ecological risk assessment plays an important role in formulating environmental management strategies yet little attention to this region. In this study, we established an ecological risk assessment index system based on 30 evaluation indices in the categories of hydrometeorology, ecological environment, ground surface disturbance, and society and economy for the Gannan Plateau. An entropy method was used to calculate an index weight,and subsequently the matter-element method was used together with extension theory to establish a matter-element extension model of ecological risk. We assessed the ecological risk in this region by calculating the degree of association between index layer, system layer and target layer, and the cumulative ecological risk index. The degrees of ecological risk for the counties of the region were determined by using Arc GIS which would represent a spatial heterogeneity of the risk grade in production. Our results showed that the areas of high ecological risk were in Zhouqu County and Zhuoni County, and others were of low risk(Hezuo City, Diebu County, Xiahe County and Lintan County) or intermediate risk(Maqu County). The results of the assessment were in accord with the actual observed situation. Thus, our ecological risk assessment index system is appropriate for this region and suggests that high risk counties need a priori ecological protection. Such research could provide a technological support which would potentially prevent or reduce disasters by establishing an ecological barrier to promote the sustainable development of Gannan Plateau.
文摘Sanjiangyuan Area is located in Tibetan Plateau in Qinghai Province in China. It＇s the source of Yangtze River, Huanghe River and Lancangiiang River. Since the ecological environment became worse in recent decades, Qinghai government conducted an environmental migration project to move the herdsman out of Sanjiangyuan Area to protect the environment. Using the data we collected in five environmental migration resettlement villages in 2009 and the basic information of the nonmigrants, this paper calculated the index of migration differences to examine the selectivity between migrants and nonmigrants. The policy implication will also be discussed in this paper.
文摘Xi Congratulates Scientists on Expedition to the Qinghai-Tibet Plateau Chinese President Xi Jinping sent a congratulatory letter to a research team on the second scientific expedition to the Qinghai-Tibet Plateau on Aug.19.Xi expressed his congratulations and greetings to scientists,young students and support staff who joined the country’s second comprehensive scientific expedition to the plateau.He noted that the expedition will promote the plateau’s sustainable development and the world’s ecological environmental protection.
