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Analysis of Water Resources Supply and Demand and Security of Water Resources Development in Irrigation Regions of the Middle Reaches of the Heihe River Basin, Northwest China 被引量:11
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作者 JI Xi-bin KANG Er-si +3 位作者 CHEN Ren-sheng ZHAO Wen-zhi XlAO Sheng-chun JIN Bo-wen 《Agricultural Sciences in China》 CAS CSCD 2006年第2期130-140,共11页
Based on the data for meteorology, hydrology, soil, planting, vegetation, and socio-economic development of the irrigation region in the middle reaches of the Heihe River basin, Northwest China, the model of balance o... Based on the data for meteorology, hydrology, soil, planting, vegetation, and socio-economic development of the irrigation region in the middle reaches of the Heihe River basin, Northwest China, the model of balance of water supply and demand in the region was established, and the security of water resource was assessed, from which the results that the effects of unified management of water resources in the Heihe River basin between Gansu Province and Inner Mongolia on regional hydrology are significant with a decrease in water supply diverted from Heihe River and an increase in groundwater extracted. In addition, it was found that the groundwater level has been steadily decreasing due to over pumping and decrease in recharges. In present year (2003), the volume of potential groundwater in the irrigation districts is far small because of the groundwater overdraft; even in the particular regions, there is no availability of groundwater resources for use. By 2003, water supply is not sufficient to meet the water demand in the different irrigation districts, the sustainable development and utilization of water resources are not secured, and the water supply crisis occurs in Pingchuan irrigation district. Achieving water security for the sustainable development of society, agriculture, economy, industry, and livelihoods while maintaining or improving the abilities of the management and planning of water resources, determining of the reasonable percentage between water supply and groundwater utilization and water saving in agricultural irrigation are taken into account. If this does not occur, it is feared that the present performance of water development and planning may further aggravate the problem of scarcities of water resources and further damage the fragile ecological system. 展开更多
关键词 middle reaches of Heihe River irrigation region water resources supply and demand balance evaluation of the security of water resources
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Prospect of Lithium Resources Supply and Demand 被引量:3
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作者 ZHOU Ping TANG Jinrong XIANG Renjie 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第S1期287-288,共2页
1 Introduction The conflict between resources and the environment has been increasingly outstanding as the population,economy and society around the globe have developed rapidly since the 21st century.An important cha... 1 Introduction The conflict between resources and the environment has been increasingly outstanding as the population,economy and society around the globe have developed rapidly since the 21st century.An important challenge that the human 展开更多
关键词 Prospect of Lithium resources supply and Demand TRU
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The Research of Supply Chain Management Resource Model
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作者 Jihui Ma Zhongyi Zhang Shihai Du 《Chinese Business Review》 2004年第10期40-44,共5页
Considering the harder and harder competition among enterprises, this paper puts forward the Resource model of supply chain (RBV) to enhance competitive advantages, then analyses the source of supply chain competiti... Considering the harder and harder competition among enterprises, this paper puts forward the Resource model of supply chain (RBV) to enhance competitive advantages, then analyses the source of supply chain competitive advantages and introduce the advantage formula. Finally, the rent contribution to supply chain management is explained in detail. 展开更多
关键词 supply chain management resource model RBV
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Study on Supply Drive and Demand Drive of the Telecommunication Operation
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作者 Min Wang Qi Kang 《Chinese Business Review》 2004年第3期64-69,共6页
This paper analyzes the total movement period of the development of the world telecommunication industry, and points out the basic principles of the supply and demand regulation and the market drive are important and ... This paper analyzes the total movement period of the development of the world telecommunication industry, and points out the basic principles of the supply and demand regulation and the market drive are important and useful to the telecommunication industry. The thesis puts forward the pertinent evaluation and the positive suggestions according to the general characteristics and individual characteristics of Chinese telecommunication industry and emphasizes the meaning of the demand drive. 展开更多
关键词 supply drive demand drive resources excess telecommunication operation
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Optimization research on supply and demand system for water resources in the Chang-Zhu-Tan urban agglomeration 被引量:3
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作者 XIONG Ying LI Jingzhi JIANG Dingling 《Journal of Geographical Sciences》 SCIE CSCD 2015年第11期1357-1376,共20页
Using system analysis theory and methods, a dynamic model of a water resource supply and demand system was built to simulate trends in the supply and demand of water in the Changsha-Zhuzhou-Xiangtan (Chang-Zhu-Tan) ... Using system analysis theory and methods, a dynamic model of a water resource supply and demand system was built to simulate trends in the supply and demand of water in the Changsha-Zhuzhou-Xiangtan (Chang-Zhu-Tan) urban agglomeration for the period 2012 to 2030. Four scenarios were examined; namely, a traditional development model, an economic development model, a water-saving model, and a coordinated development model. (i) The problem of balancing water resource supply and demand is becoming increasingly conspicuous with a growing population and a rapidly developing economy. (ii) By 2030, water demand is set to reach a total of 105.1 × 10^8 m^3, with a water supply of 5.4 × 10^8 m^3. A coordinated development model for water resource supply could meet the growing demands of socio-economic development, and generate huge comprehensive benefits. This will be the best solution for the development and utilization of a water resource supply and demand system in the Chang-Zhu-Tan urban agglomeration. (iii) We should accelerate the construction of water conservation projects, strengthen the management of water conservation, optimize economic structures, enhance our awareness of the importance of protecting water resources, hasten the recycling of waste water and environmental improvement, and promote utilization efficiency, and support the capabilities of water resources to meet our expectations. 展开更多
关键词 water resource supply and demand system analog simulation optimization decision-making system dynamics Chang-Zhu-Tan (Changsha-Zhozhoa-Xiangtan) urban agglomeration
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Modeling demand/supply of water resources in the arid region of northwestern China during the late 1980s to 2010 被引量:7
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作者 LIU Xingran SHEN Yanjun +2 位作者 GUO Ying LI Shuo GUO Bin 《Journal of Geographical Sciences》 SCIE CSCD 2015年第5期573-591,共19页
Water demand increases continuously with an increasing population and economic development. As a result, the difference between water supply and demand becomes a sig- nificant issue, especially in arid regions. To fig... Water demand increases continuously with an increasing population and economic development. As a result, the difference between water supply and demand becomes a sig- nificant issue, especially in arid regions. To figure out the utilization of water resources in the arid region of northwestern China (ARNWC), and also to provide methodologies to predict the water use in future, three models were established in this study to calculate agricultural irri- gation, industrial and domestic water use in the ARNWC from the late 1980s to 2010. Based on river discharges in the region, the supply and demand of water resources at the river basin level were analyzed. The results indicated that agricultural irrigation demand occupies more than 90% of the total water use in the ARNWC. Total water demand increased from 31.97 km3 in the late 1980s to 48.19 km3 in 2010. Most river basins in this arid region were under me- dium and high water stress. Severe-risk river basins, such as the Shiyang river basin and the eastern part of the northern piedmont of the Tianshan Mountains, were found in this region. It was revealed that the water supply became critical from April to May, which was the season of the lowest water supply as determined by comparing monthly water consumption. 展开更多
关键词 agricultural irrigation water demand industrial water demand domestic water demand total waterdemand supply and demand of water resources arid region of northwestern China
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Construction Direction and Development Path of Digital Educational Resources in the Era of New Educational Infrastructure Construction 被引量:2
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作者 KE Qingchao LIN Jian +1 位作者 MA Xiufang BAO Tingting 《Frontiers of Education in China》 2022年第4期510-531,共22页
Digital educational resources have become essential elements of modern educational public services.China’s national program on new educational infrastructure construction has proposed to take new infrastructure const... Digital educational resources have become essential elements of modern educational public services.China’s national program on new educational infrastructure construction has proposed to take new infrastructure construction of digital educational resources as one of the critical tasks.This paper aims to provide a theoretical basis for advancing the reform and development of digital educational resources in the new era.It classifies the current development and realistic challenges of China’s digital educational resources,and summaries and interprets the directions of the three construction projects of new type resources and tools,the resource supply system,and the resource supervisory system.It depicts the prospect of digital educational resource construction in the intelligent era in the combination of the strategic layout of the policies on new educational infrastructure construction.It also discusses such key technologies supporting new infrastructure construction of digital educational resources as multimodal learning analytics,disciplinary knowledge graphs,machine learning,and blockchain.It finally proposes a specific development path for new infrastructure construction of digital educational resources. 展开更多
关键词 new educational infrastructure construction digital educational resources disciplinary knowledge graph resource supply system
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