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Understanding the historical trends and driving mechanism of China's soil moisture change is an important step in combating climate change. Using the time series satellite-derived Essential Climate Variable Soil Moisture (ECV_SM) product, we detected a significant decrease trend in land surface soil moisture in eastern China over a 32-year period (1979–2010). Theoretical sensitivity analysis suggested...
In this paper, the spatial pattern analysis is made on the development level difference among the primary industry, secondary industry and tertiary industry in 11 counties and cities with Class-I ports. The analytical results show that the economic development is unbalanced and quite different in these counties of Yunnan Province with Class-I ports.
In order to make a quantitative analysis on spatial pattern of headquarters about top 500 enterprises of Chinese service industries, the software of ArcGIS 9.2 was adopted. The results showed that the headquarters were mainly distributed in the eastern coast region of China. The value of global Moran's I was about 0.11. High value regions were all distributed in the eastern coast region of China and...
The spatial pattern of land use/cover was quantitative analyzed by using DEM data. The results show that: (1) the spatial distribution rule of land use/cover with the change of elevation and slope has notable characteristic. The agricultural land, construction land, orchard, water and wetland in strongly human-disturbed land use types mainly distribute in lower altitude region and smaller gradient...
The spatial pattern of prehistoric settlement sites in Henan Province is researched. By analyzing the relationship between prehistoric settlement sites location and regional altitude, terrain slope, rivers and other geographical environment factors, the laws of the distribution of prehistoric settlement sites are found: more than 70% of settlement sites are located at the altitude of from 50 to 400...
Principal component analysis (PCA) were applied to assess surface water quality of the Songhuajiang River basin, China. Thirteen physical-chemical parameters in 25 stations were collected monthly during the period of 2008. Three factors were extracted by PCA, which explained 83.79% of the total variance. The first factor (PCA1) was positive correlated with permanganate index, BOD5, NH3-N, CODCr, TN,...
To explore cause of collapse of Neolithic Culture around 4000 calendar(cal.) yr BP in the Wensi River Basin, Shandong, China, data of archaeological sites and features of artifacts both Longshan Culture and Yueshi Culture were collected. Based on the GIS software, the spatial and temporal pattern of sites were built. Results reveal that the advanced Shandong Longshan Culture was replaced by the lagged...
The cities and Towns along the Jialing River can be categorized into 9 spatial patterns: top-outside, top-inside, heart, neck, waist-inside, waist-outside, twins, straight and intersection. Each pattern has its own advantages and disadvantages. Analysis on 95 cities and Towns in the mainstream of Jialing River shows that the dominant spatial patterns are top-outside, straight, and intersection. Optimal...
The study of land use/cover change helps to explain the inner mechanism of interaction of human-earth system. Based on the classification of the remote sensing data in 1978, 1987, 2000 and 2005, using indices representing spatial pattern characteristics of land use/cover such as gravity center migration, diversity index, dominance index, evenness index and fragmentation index, spatial pattern dynamics...
The application of GIS in regional studies has been an increasingly active area of research in recent years. The core issues include spatial statistics and the visualization of spatial data. In this paper, we discussed some exploratory approaches in identifying the urban center-periphery areas growth patterns using spatial statistics and GIS visual techniques. Some traditional spatial statistics and...
Rapid economic development, combined with tremendous population growth and migration from rural areas, has resulted in a dramatic urbanization in the Yangtze River Delta over the last three decades. In order to develop a more quantitative understanding of urbanization trajectory in the Yangtze Delta from the late 1980s to 2005, the time-series national land cover / land-use database (NLCD), interpreted...
This paper analyzed the spatial pattern of cultivated land conversion in the Coastal Area of Pearl River Estuary based on RS and GIS technology. The results showed that the cultivated land area reduced rapidly under the pressure of urban expansion, and it was the main period about the cultivated land to reduce from 1988 to 1995. Other types of land also were converted to the cultivated land, which...
In this study, the decision tree (DT) classification technique was used to detect the land use changes based on the spectral characteristics of the samples and the spatial patterns of the six land use classes for two landsat images for the Shalamulun river catchment of China acquired in 1987 and 2001. And post-classification change detection technique was applied to map land cover changes. For validating...
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