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Comprehensive understandings to the built environment especially the urban form is a prerequisite for building a smart city. This paper is based on computational methods to examine the urban fabric of Hankou, China, as a case study. Quantitative and comparative analyses are involved to understand the characteristics on the block scale, where massive demolition and new construction coincide with the...
Due to high risk of unstable supply from fossil energy and growing concern with the preservation of the environment, well-developed Jiangsu province in China is hungering for alternative energy resources to catalyze stupendous economic growth. Assessing the technically available potential of solar energy spatially and temporally over the whole province might be able to improve the unfavorable situation...
Geographers, demographers and other scholars have a sustaining interest in China's population distribution. The research is based on China's GIS data sets of population census in 1953, 1964, 1982, 1990 and 2000. The first part of this study is to analyze the population density patterns by various spatial analysis methods and explain possible influencing factors. The second part analyzes population...
Through the study of the sharing mechanism on international and domestic geographical spatial information, it is analyzed to the development process, the problem and the strategy on the sharing mechanism of the geographical spatial information in China, and suggested to the construction and the development planning on the sharing mechanism of the geographical spatial information in China.
Four dates Landsat MSS, TM and ETM+ images together with historical topographic maps, land use maps were used to analyze and quantify the temporal dynamics and spatial pattern of land use/cover changes and identify the urban expansion in Xining city, northwest China. The results indicated that from 1977 to 2007, the areas of cultivated land, grassland and unused land decreased by 3.31%, 1.1% and 0...
In order to make a quantitative study about accessibility of cities in China, the spatial analyst module functions of ARCGIS were mainly used to do an empirical research about it based on land traffic network structure and calculations of optimal road routes and time to cities of China, which generated accessibility diffusion graph and average accessibility graph of cities. And then, the ESDA was...
The study on the coupling relationship between the variation of soil erosion and geomorphological factors in watershed scale will contribute to the effectiveness of soil and water conservation. Based on soil erosion database, the topographic variations of soil erosion in watershed and the relationship between it with different geomorphologic factors were analyzed in the paper, with a case study of...
The study on groundwater vulnerability is an effective technical measure for rational development and protection of groundwater resource. In the paper, according to the hydrogeology conditions of the Lincang Basin in Yunnan Province, USEPA's DRASTIC method was applied to evaluate the groundwater vulnerability of this area with the consideration of depth to the water table, Net recharge, aquifer material,...
This paper taking Mudanjiang in Heilongjiang Province as the study region, the remote sensing data and topographic map data in forth years as a basis for data, the vulnerability model was evaluated based on the sensitivity, exposure and adaption ability, relevant parameters of model was acquired by GIS and RS technology and mathematic model, and the vulnerability of ecological environment was in a...
This study was undertaken in Danjiangkou reservoir and the upper reaches, where the SWAT model was used to analyze the space distribution of non-point source pollution. The land-use pattern was interpreted by Environment for Visualizing Images Software (ENVI). The runoff and the sediment data series from 2001 to 2006 were collected to calibrate the parameters and validate the model. The calculated...
With the aid of the spatial analyzing technology, three periods land use data of the Longchuanjiang catchments have been obtained. Raster-conversion and cartographic algebraic operation were conducted of the land coverage data, using a complex method integrating GIS spatial analysis with traditional statistical analysis, to create a new GRID database. Based on the database, the effect of land use...
In order to exploit solar energy resources, and improve agricultural production and, this paper make a analyses and calculation about the distribution of direct solar radiation in Yanchi country of Ningxia by using the geographic information system(ViewGIS3.0). In addition, we combined with meteorological data to ascertain the period of effectively using solar radiation resource for agricultural production...
This research is innovative in such aspects as research content, method and so on. Authors took Northeast China as study area, with the help from "3S" technology and based on spatial and temporal land resource data, agricultural statistics data and considering the natural and socio-economic factors. And, this paper analyzed the impact of cultivated land change on the grain production capacity...
The Zhuhai city in Pearl River Delta was chosen as a study area. The soil samples were recollected according to the sampling points of Second National Soil Survey. Based on application of geographical information system (GIS) and SPSS software, the content, distribution and its influence factors of available Cu in cultivated soils were analyzed. The results showed that: the average available copper...
Geographic informational system (GIS) and the Soil and Water Assessment Tool (SWAT) was used to simulate the transport of runoff, sediment, total nitrogen and total phosphorus into the Zhangjiafen stations. The main objective was to discuss climate change affecting on sediment and water quality. The results showed: The SWAT generally performs well and could accurately simulate monthly runoff, sediment,...
Great land use change has taken place in most regions worldwide and such information is urgently needed to help the mankind with rational land use and development. In this paper, land use and change for Xinxiang City in Henan Province of China were analyzed in 1995, 2000 and 2005 by using a series of Landsat Thematic Mapper (TM) satellite data. And spatiotemporal characteristics analysis of land use...
FY-2C is geostationary satellite which is researched and developed by China. The primary advantage of geostationary satellite is the ability to characterize the radiance by obtaining numerous views of a specific earth location at any time of a day. This allows the production of a composite image to monitor short-term weather better. In this paper, data compression from the composite multi-spectral...
The study investigated the performance of support vector machine (SVM) classifier for regional land cover mapping. First, 8 input features derived from MODIS time series and DEM data were selected by Jeffreys-Matusita distance. Then, all the features were analyzed to generate land cover map of Sanjiang Plain in China, using SVM algorithm. Finally, we evaluated the impact of sample size and its distribution...
Nowadays, the harmful blue-green algae blooms on lakes or streams threaten the daily life of millions of people in China. In this paper, we demonstrate the sensor network system we built on Lake Tai for the surveillance and cleanup of the algae blooms which is at work in Wuxi City, Jiangsu Province. We designed the sensor device and algorithm to monitor the algae bloom and estimate the bloom area...
With regional economy development, regions interact each other and aren't independent any more. This paper aimed to reveal how the regions (provinces) effect to each other in terms of industry from spatial angle, put forwards and defined four modes of inter-regional industrial interactions based on basic regional agglomeration and radiation theory, and explored quantitative measurements combining...
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