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Yu S.-M.,CAS Institute of Tibetan Plateau Research | Yu S.-M.,University of Chinese Academy of Sciences | Liu J.-S.,CAS Institute of Tibetan Plateau Research | Yuan J.-G.,Hebei Normal University | Yuan J.-G.,Hebei Key Laboratory of Environmental Change and Ecological Construction
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2010

The area we studied is Lake Yamzho Yumco Basin (28°27'-29°12'N, 90°08'-91°45'E), the largest inland lake basin in southern Tibetan Plateau, China. Using the SPOT-VGT NDVI vegetation index from 1998 to 2007 in the basin, the temporal and spatial variation characteristics of NDVI and its correlation with the major climatic factors (air temperature, precipitation) were analyzed. The results show that the average NDVI of the lake basin ranges from 0.12 to 0.31and its seasonal change is obvious; the NDVI begins to rise rapidly in May and reaches the maximum value in early September. The average NDVI of the basin shows the slow increasing trend during 1998 to 2007, and it indicates that the eco-environment of the basin is recovering. The high value of NDVI has close relationships with water supply, altitude and vegetation types, so NDVI is relatively high near water sources and is the highest in meadow grassland. The summer air temperature and precipitation are the important climate elements that influence the vegetation in the basin, and the linear correlation coefficients between NDVI and air temperature and precipitation are 0.7 and 0.71, respectively. In recent years, warm and humid trend of the local climate is prevailing to improve the ecological environment in YamzhoYumco Basin. Source


Liu J.,Hebei Normal University | Wang W.,Hebei Key Laboratory of Environmental Change and Ecological Construction | Xiang H.,Hebei Key Laboratory of Environmental Change and Ecological Construction
Proceedings - 2011 19th International Conference on Geoinformatics, Geoinformatics 2011 | Year: 2011

A computational model of multi-scale population densities was developed based on the native population database of Shijiazhuang city. The model comprises four parts: data processing, down-scaling, data format conversion and up-scaling. Down-scaling was completed by apportioning village population to each street block. The vector dataset of block population was converted into 100m×100m grid dataset, which is the minimum grain population density. By changing the radius of circular filter factor, the up-scaling of population density was realized and the multi-scale population density was obtained. The results show that the long-term balance of human and nature environment can be clearly revealed on the maps of population densities at R =0, R =3, R =12, R =29 and R =99. The model is helpful to observe the interaction of man-land relationship at different scales systematically, and to build a mathematical foundation for studying the MAUP (The Modifiable Area Unit Problem) of population density. © 2011 IEEE. Source


Huang Z.Y.,Shijiazhuang University of Economics | Chen J.,Hebei Provincial Land Consolidation Service Center | Liang Y.Q.,Hebei Normal University | Liang Y.Q.,Hebei Key Laboratory of Environmental Change and Ecological Construction | And 2 more authors.
Advanced Materials Research | Year: 2013

In recent years, due to the differences between natural environment and the human way of life, under the pressure of environment and development, there presented varying degrees of frangibility in different areas. Take the north mountain of Hebei Province as an example to make spatio-temporal analysis, which can provide basis for sustainable development of economic, society and environment. Research results showed that: from the perspective of time series, the overall situation of ecological environment was improved, and the average ecological frangibility index declined by 0.19% from 1987 to 2000, and it declined by 0.77% from 2000 to 2008. From the perspective of space series, the overall state was improved. © (2013) Trans Tech Publications, Switzerland. Source


Long L.M.,Hebei Normal University | Long L.M.,Hebei Key Laboratory of Environmental Change and Ecological Construction | Zhao L.B.,Hebei Normal University | Zhao L.B.,Hebei Key Laboratory of Environmental Change and Ecological Construction | Guo Y.R.,Hebei University of Science and Technology
Advanced Materials Research | Year: 2014

The protection of historical street plays an irreplaceable role in historic continuity of ancient city. This article takes Center Street of Dingzhou city in Hebei Province as an example, the evolution process of Center Street is analyzed, and the value of historical and cultural characteristics is summarized. The major problems and reasons of historical style are discussed from aspects of street scale, land functions and landscape style, etc. Planning thoughts on relocating Center Street, continuing the historical style of Song Dynasty and constructing vigorous commercial streets are proposed. Historic styles remediation goals of Center Street are determined. Specific planning ideas are proposed, including taking streets as axis to form five important historical nodes from south to north, including South Gate, South Street guhuai, Kaiyuan Temple, Dingzhou Museum and Temple, and updating the constructions on streets, continuing historic features of Song Dynasty, enhancing landscape and environmental construction and improving street traffic conditions. The historical streets carrying the millennium change of ancient city, is the core of ancient city styles. Due to natural and man-made destruction, many historical glorious objects have all gone, so the retained historical and cultural heritages have become very valuable, especially those existing historical streets. The significance of protection lies not only in the historical, artistic and scientific values of the street itself, the more important is its irreplaceable function in improving the quality of urban culture, maintaining and continuing the features and styles of historical and cultural city. Dingzhou city in Hebei Province was approved as a provincial-level historical and cultural city in 1988. Center Street is located at the center of the city, and is an important commercial street of the ancient city of Dingzhou surrounded by many historic interests. Based on the protection of places of historic interest, renovation and protection of the Center Street Historic Street, the resumption and continuation of the traditional pattern and historical style has become an urgent problem to be solved.1. The formation, evolution and value assessment of the Center Street of Dingzhou. © (2014) Trans Tech Publications, Switzerland. Source


Li J.,Hebei Normal University | Li R.,Hebei Normal University | Li R.,Hebei Key Laboratory of Environmental Change and Ecological Construction
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2012

Sight-seeing route is an interactive interface between tourists and ecotourism environments. How to design tourist routes perperly and reduce the interference to the environment is an important issue to be resolved in ecological tourism plannings. Although public attitudes towards landscapes are shaped by many different factors, such as age, sex, social and economic status etc., there are also some common preferences to landscape types, especially for people with similar education background or environmental value orientations. Ecotourists are just such groups. This paper introduced the visible perception affected by landscape visibility, the best viewing distance and the best viewing orientation, and the ecological perception affected by the landscape types and the resource value into the landscape perception sensitivity model, and built a synthesis-weight computation model of ecotourism destination sight-seeing routes selection with the combination of topographic factors such as slope and relief degree of land surface (RDLS). The main steps are as follows. Firstly, the authors calculated the landscape perception degree of each landscape, then added the results together and divided the results into ten levels from high to low using the reclassification tools of ArcGIS, assigned 1-10 to each level; Secondly, calculated the slope and RDLS using terrain analysis tool of ArcGIS platform, and also divided the results into ten levels from low to high using the reclassification tools of ArcGIS, assigned 1-10 to each level; Thirdly, built the suitability computation function of sight-seeing route selection in ecotourism destinations, and calculated the weight results combined with landscape perception degree and terrain factors, then selected the best sight-seeing route using the optimal path analysis of ArcGIS platform; Finally, revised the sight-seeing route acquired automatically with field trips, expert opinion and other factors, so as to the characteristics of scenic landscape to be shown better, and the route is more realistic. This method is tested in the case of Qixiagu scenic region, Wu'an National Geopark in Handan, Hebei Province. Based on Digital Elevation Model (DEM) and high-resolution satellite images, the authors first built the virtual 3D landscape in the ecotourism destination, and then the best scenic sight-seeing route of Qixiagu scenic region was selected automatically based on the virtual geographical environment structured by ArcGIS platform. Finally the sight-seeing route was revised by field trips and other correction factors. Thus a sight-seeing route was determined in easy way where tourists can have better perception. This method can supply us a relatively reasonable sight-seeing route quickly in scenic spot planning period. The synthesis-weight computation model of ecotourism destination sight-seeing route selection provides a quantitative analysis method for the plannings of ecotourism and landscape designs in micro-scale. This method can be also applied to the evaluation the existing sight-seeing route in scenic spot. So it can provide more ideas and references for the management and ecology protection of scenic spots. Source

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