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Yan H.,Beijing Forestry University | Yan H.,Zhejiang Agriculture And forestry University | Fan S.,Beijing Forestry University | Guo C.,Beijing Forestry University | And 3 more authors.
PLoS ONE | Year: 2014

The effects of land cover on urban-rural and intra-urban temperature differences have been extensively documented. However, few studies have quantitatively related air temperature to land cover composition at a local scale which may be useful to guide landscape planning and design. In this study, the quantitative relationships between air temperature and land cover composition at a neighborhood scale in Beijing were investigated through a field measurement campaign and statistical analysis. The results showed that the air temperature had a significant positive correlation with the coverage of man-made surfaces, but the degree of correlation varied among different times and seasons. The different land cover types had different effects on air temperature, and also had very different spatial extent dependence: with increasing buffer zone size (from 20 to 300 m in radius), the correlation coefficient of different land cover types varied differently, and their relative impacts also varied among different times and seasons. At noon in summer, ∼37% of the variations in temperature were explained by the percentage tree cover, while ∼87% of the variations in temperature were explained by the percentage of building area and the percentage tree cover on summer night. The results emphasize the key role of tree cover in attenuating urban air temperature during daytime and nighttime in summer, further highlighting that increasing vegetation cover could be one effective way to ameliorate the urban thermal environment. © 2014 Yan et al. Source


Jin P.,Zhejiang University | Fu Z.,Beijing Tsinghua Urban Planning and Design Institute | Ban M.,Zhejiang University
Chinese Geographical Science | Year: 2012

Karst cave tourism plays an important role in the overall tourism of Zhejiang Province, China. In analyzing the current status of karst cave tourism resources, it is crucial to develop a scientific system for optimizing resource exploitation and tourism development in the future. This study conducted an analysis of resource characteristics and regional structure in Zhejiang Province. Nearest neighbor index (NNI) method and accessibility index method were used for a comprehensive understanding of the effects of scale, strength, combination, and accessibility of karst cave tourism resources. Results indicated that karst cave tourism resources in Zhejiang Province have a significant regional influence, and that resource quality and exploitation are diverse in different regions. Among the regions, Jinhua had the highest exploitation proportion of over 60% and the lowest NNI value of 0.098. Furthermore, regional analysis inferred that different karst caves demonstrate diversity in accessibility to tourism markets, among which the Lingshan Cave, Fengshui Cave, and Xianqiao Cave reveal the highest accessibility index of 2.41. Finally, we put forward a karst cave tourism system in Zhejiang Province based on the Growth Pole Theory and set up an overall scheme for karst cave tourism development. From a regional perspective analysis, the study refined the methods for regional resource research and provided a strategic proposal for karst cave tourism in Zhejiang Province. © Science Press, Northeast Institute of Geography and Agroecology, CAS and Springer-Verlag Berlin Heidelberg 2012. Source


Lin W.,Tsinghua University | Yu T.,Beijing Tsinghua Urban Planning and Design Institute
2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings | Year: 2011

China is now practicing the rural construction to narrow the gap between the urban and rural areas. Consequently, tens of millions of dollars are pumped into rural areas. To guarantee the social equity and achieve the economic efficiency, however, where or which villages should accept the investment? This paper aims to forming a technical flow details on how to pick out the exact built locations of public service facilities from great lots of counties with preconditions that the distribution and size of counties are invariable. We consider the issue as a set covering problem that can be resolved by spatial analysis technique. This method is used to locate different levels of school in Linzhou, Henan province, China. Results show that this method has a great maneuverability in practice. © 2011 IEEE. Source


Lin W.-Q.,Tsinghua University | Zheng X.-J.,Beijing Tsinghua Urban Planning and Design Institute
Proceedings - 2012 International Conference on Biomedical Engineering and Biotechnology, iCBEB 2012 | Year: 2012

Urban construction and other human activities have been changing the local and regional ecosystems and causing a lot of ecological problems. After reviewing the problems happened, this paper presents a theoretical framework of ecological researches analyzing what should be done to meet the needs and the orders of the natural patterns and processes. This framework is now used in our project of the national park study in the northwestern region of Yunnan province, southwest of China. © 2012 IEEE. Source


Konig H.J.,Leibniz Center for Agricultural Landscape Research | Konig H.J.,University of Potsdam | Zhen L.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Helming K.,Leibniz Center for Agricultural Landscape Research | And 6 more authors.
Land Degradation and Development | Year: 2014

The goal of China's sloping land conversion programme (SLCP) is to combat soil erosion and to reduce rural poverty. An ex-ante assessment of possible SLCP impacts was conducted with a focus on rural sustainability, taking the drought-prone region of Guyuan in Western China as an example. The Framework for Participatory Impact Assessment (FoPIA) was used to conduct two complementary impact assessments, one assessing SLCP impacts at regional level and a second one assessing alternative forest management options, to explore possible trade-offs among the economic, social and environmental dimensions of sustainability. Regional stakeholders assessed the SLCP to be capable of reducing soil erosion but felt it negatively affected rural employment, and a further continuation of the Programme was advocated. Assessment of three forest management scenarios by scientists showed that an orientation towards energy forests is potentially beneficial to all three sustainability dimensions. Ecological forests had disproportionate positive impacts on environmental functions and adverse impact on the other two sustainability dimensions. Economic forests were assessed to serve primarily the economic and social sustainability dimensions, while environmental impacts were still tolerable. The FoPIA results were evaluated against the available literature on the SLCP. Overall, the assessment results appeared to be reasonable, but the results of the regional stakeholders appeared to be too optimistic compared with the more critical assessment of the scientists. The SLCP seems to have the potential to tackle soil erosion but requires integrated forest management to minimize the risk of water stress while contributing to economic and social benefits in Guyuan. © 2012 John Wiley & Sons, Ltd. Source

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