Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The China-Russia Crude Oil Pipeline (CRCOP), one of the four key national energy strategic channels, plays an important role in ensuring national energy security, diversifying oil supplies and transportation patterns, promoting the China-Mongolia-Russian economic corridor, and deepening Sino-Russian strategic cooperation. Aiming at permafrost engineering problems along the CRCOP, the principles of thaw control are put forward. This study develops a set of innovative techniques for mitigating and controlling the thaw of permafrost foundation soils of the pipeline, which provides an important guarantee for the green construction and safe operation of the CRCOP and can protect the permafrost environment along the pipeline route. The research results can offer important references and basis for design, construction, and maintenance of the similar projects in permafrost regions.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The cross-border railways and oil and gas pipelines along the China-Mongolia-Russia Economic Corridor are key hubs and channels supporting the regional cooperation and development. It is very important to complete scientific regionalization of ecological risk of China-Mongolia-Russia Economic Corridor and put forward suggestions to guarantee smooth construction and safe cross-border traffic project. By establishing ecological risk evaluation model, we quantitatively analyzed the ecological risk of China Mongolia#2;Russia Economic Corridor, and regionalized high, middle, and low risk. We put forward the ecological risk prevention and control countermeasures for China-Mongolia-Russia Economic Corridor. It shows that the ecological risk areas are distributed along the “two belts and one line”. The risk of desertification is along the China-Mongolia-Russia cross-border traffic belt, the risk of permafrost is along the China-Russia cross-border traffic belt and the China-Russian crude oil pipeline. The proposed suggestions are designated to prevent and control ecological risk from the perspectives of promoting ecological civilization to realize a “two-highs and three-lows” mode; constructing of a green economic corridor, optimizing the industrial structure, actively establishing a four-tier circular economy system, and developing green circular industries; innovating technical biological engineering; establishing system and mechanism of an international cooperation and monitoring ecological risk network system along China-Mongolia-Russia Economic Corridor. We provide scientific technic support for rationally building cross-border railways and pipelines, avoiding and preventing ecological risks in China#2;Mongolia-Russia Economic Corridor. It will be decision-making basis to promote regional green and sustainable development.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The cryosphere is closely related to climate change, human engineering activities and social and economic development. Each element of cryosphere has significantly different influence characteristics on engineering. Disasters by glaciers, snow cover, and sea (river and lake) ice will mainly affect the construction, safe operation, and serviceability of engineering. Frozen soil is a special foundation soil for engineering structures, thus freezing-thawing disasters and thermal and mechanical stability change of frozen soil will directly affect the stability of engineering. As global change, the elements of cryosphere change and its hydrological and ecological environment, surface process changes have significant influence on engineering, thus it is needed to strengthen the relationship research between the engineering construction and safety operation and the environmental factors change. In addition, engineering security technology is also needed to be more comprehensive to consider the influence of climate and environment changes. Therefore, climate and environmental change will become an important factor to be considered in the construction, safe operation, and serviceability of engineering in the regions of cryosphere in the future. At the same time, the Belt and Road infrastructure construction not only brings opportunities to cryosphere engineering, but also faces greater challenges.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-05-24 Cooperative journals: 《干旱区研究》
Abstract：冻融作用对土壤呼吸的“激发效应”被证实在高纬度及高海拔地区普遍存在。气候变暖背景下，这些区域将经历更为频繁的冻融变化，并可能提高土壤呼吸对区域碳循环的贡献。本文概述了冻融作用对土壤呼吸的“激发效应”，从土壤物理性状、根系周转、微生物活性及群落结构等方面阐述了冻融作用对土壤呼吸的影响机制。未来研究需要：① 强化对高海拔生态系统的研究；② 注重将原位观测与室内冻融模拟相结合，并进一步优化室内模拟实验；③ 综合考虑生物及非生物因子影响；④ 从土壤呼吸组分的角度探究土壤呼吸对冻融变化的响应机理。
Hits
YES
Hits
Downloads
Comment