In China, urbanization of agricultural land around city agglomerations increases rapidly. Rapid urbanization of agricultoral land affects food supply, land value and ecological balance in the society. In China, the ur...In China, urbanization of agricultural land around city agglomerations increases rapidly. Rapid urbanization of agricultoral land affects food supply, land value and ecological balance in the society. In China, the urban built-up area had increased by 40% from 1996 to 2003. This increase came predominantly from farmland surrounding the cities. How the ongoing urbanization of China affects its agricultural land is the focus of this paper. In current studies, we have found that population density; urbanization degree and personal income are key factors that influence the urbanization process. Based on this, relation model has been established and to predict the general trends of the urban area expansion in China in 2020.In 2020, the constructed urban area of China would be increased by 1.3 times compared wtth 2003. In 2020, this study anticipates the conversion of about 32,562 sq. kin. agricultural land of China for urban use.展开更多
In China, Qanats are found solely in the Xinjiang Uygur Autonomous Region, this system has greatly contributed since long ago to local livelihood, especially agriculture. Today, there are around 600 Qanats in Xinjiang...In China, Qanats are found solely in the Xinjiang Uygur Autonomous Region, this system has greatly contributed since long ago to local livelihood, especially agriculture. Today, there are around 600 Qanats in Xinjiang, located especially in Turpan and Hami pefectures. Uygur people are the main users of the Qanat, they are not only using the techniques of construction and maintenance but they are also integrating Qanat into their culture. Today, Qanats in China are facing more and more crises with the local developmental impacts from enlarging farmland, groundwater over-extraction, seasonal water shortages, costly management, and conflicts of the interest, etc.. According to some studies, the number of Qanats in Xinjiang was reduced from 1,784 in 1950 to 600 today, which are equivalent to a decline of 23 Qanats per eventually come to end in the coming decades if we do not have year. Consequently, many experts are concerned that Qanats will effective efforts for their maintenance. It is a fact that Qanat is still able to adapt to the local environment, the local livelihood and against climate change, it cannot be converted to other hydraulic system in the arid environment of Xinjiang so far, but it is also challenged by current developments, especially rising amount of water consumption and costly maintenance. This paper aims to discuss the currently situation of Qanats in Xinjiang of China and their protection and sustainable use in a context of current development of industry, urbanization and local environmental change.展开更多
Building a forest city requires sufficient area of urban forests and an expedite water circulating system. Taking Shanghai asan example, it isproposed that China should develop its urban forestry through networking of...Building a forest city requires sufficient area of urban forests and an expedite water circulating system. Taking Shanghai asan example, it isproposed that China should develop its urban forestry through networking of forests and water areas due to high density of population, limited land resources and poor water circulating system. In orderto develop aconception of urban forest with Chinesecharacteristics, this paper elaborates implications, foundation, evolution and development of the new conception through comparative studies of urban forest developmentinside and outside China.展开更多
基金This work is supported by the National Natural Science Foundation of China(GrantNo.70273012)Century Elitist Supporting Program of China education ministry.
文摘In China, urbanization of agricultural land around city agglomerations increases rapidly. Rapid urbanization of agricultoral land affects food supply, land value and ecological balance in the society. In China, the urban built-up area had increased by 40% from 1996 to 2003. This increase came predominantly from farmland surrounding the cities. How the ongoing urbanization of China affects its agricultural land is the focus of this paper. In current studies, we have found that population density; urbanization degree and personal income are key factors that influence the urbanization process. Based on this, relation model has been established and to predict the general trends of the urban area expansion in China in 2020.In 2020, the constructed urban area of China would be increased by 1.3 times compared wtth 2003. In 2020, this study anticipates the conversion of about 32,562 sq. kin. agricultural land of China for urban use.
文摘In China, Qanats are found solely in the Xinjiang Uygur Autonomous Region, this system has greatly contributed since long ago to local livelihood, especially agriculture. Today, there are around 600 Qanats in Xinjiang, located especially in Turpan and Hami pefectures. Uygur people are the main users of the Qanat, they are not only using the techniques of construction and maintenance but they are also integrating Qanat into their culture. Today, Qanats in China are facing more and more crises with the local developmental impacts from enlarging farmland, groundwater over-extraction, seasonal water shortages, costly management, and conflicts of the interest, etc.. According to some studies, the number of Qanats in Xinjiang was reduced from 1,784 in 1950 to 600 today, which are equivalent to a decline of 23 Qanats per eventually come to end in the coming decades if we do not have year. Consequently, many experts are concerned that Qanats will effective efforts for their maintenance. It is a fact that Qanat is still able to adapt to the local environment, the local livelihood and against climate change, it cannot be converted to other hydraulic system in the arid environment of Xinjiang so far, but it is also challenged by current developments, especially rising amount of water consumption and costly maintenance. This paper aims to discuss the currently situation of Qanats in Xinjiang of China and their protection and sustainable use in a context of current development of industry, urbanization and local environmental change.
文摘Building a forest city requires sufficient area of urban forests and an expedite water circulating system. Taking Shanghai asan example, it isproposed that China should develop its urban forestry through networking of forests and water areas due to high density of population, limited land resources and poor water circulating system. In orderto develop aconception of urban forest with Chinesecharacteristics, this paper elaborates implications, foundation, evolution and development of the new conception through comparative studies of urban forest developmentinside and outside China.
