Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Lowland Technology International
Dongjie Guan
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Engineering Transportation

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
DYNAMIC EVOLVEMENT ASSESSMENT AND FORECAST OF LAND USE BASED ON GEOGRAPHIC INFORMATION SYSTEM Dongjie Guan; Xiaosong Lin; Weijun Gao; Weici Su; Kazunori Hokao
Lowland Technology International Vol 16 No 1, June (2014)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Based on the land use patterns in the years of 1990, 1995, 2000 and 2005 acquired with the spatial technology of geographic information system (GIS), this study takes Kitakyushu city in Japan as a case to analyze and forecast the dynamic change and transformation of various land use types. Firstly, we use the spatial distribution maps to describe the changes of area and spatial distribution of land use in the past 15 years, and then the dynamic change models are established to evaluate the changes of speed and intensity of land use. The results indicate that each land use type has changed remarkably as the urbanization, and that the land use intensity has been transferring from extensive type to intensive type. Finally, we develop a transfer matrix of Markov to track the mutual transformation processes among the land use types, and to forecast the change tendency of future land use. The forecasting results reveal that the urban land will keep increasing at a decelerated speed, and it will be a long process for land use intensity to reach to the urbanization level.
QUANTITATIVE ASSESSMENT OF ECO-ENVIRONMENT VULNERABILITY IN KARST REGION Dongjie Guan; Weici Su
Lowland Technology International Vol 16 No 1, June (2014)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Karst area is typical eco-environmental vulnerable area, where insufficient farmland and serious soil degeneration offer vulnerable ability to endure the natural disasters. Consequently, vulnerable eco-environment can’t coordinate with rapid social economic development, which leads to its feeble sustainable developmental ability. The Karst area of Chongqing in China as a study case , this paper sets up 13 influencing factors of eco-environment vulnerability to be assessment indexes, including earth surface of carbonate rock salt, area of mountainous region, area of slopping upland farming, degree of rock desertification (classified by gently, moderately, seriously), forest coverage, loss area of water and soil, soil erosion modulus, slip volume density, cultivation index, farmland area per capita, agriculture population density. Subsequently, the paper uses analytic hierarchy process (AHP) to endow indexes weight, and proposes an assessment model by using fuzzy mathematics method to analyze and assess the eco-environment vulnerability of Karst area. Finally, the assessment results are rankly divided. Results indicate: there are 3 potentially vulnerable counties, 10 gently vulnerable counties, 6 moderately vulnerable counties and 6 seriously vulnerable counties among the 25 Karst counties in Chongqing.
EVALUATION ON EXTENT CHANGE AND FUTURE DEVELOPMENT OF URBAN LAND USE USING GIS TECHNOLOGY DongJie GUAN; XueRu ZHANG; HaiFeng Li; Takuro INOHAE; Tadashi NAGAIE; Kazunori HOKAO
Lowland Technology International Vol 14 No 1, June (2012)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Based on four phases of land use patterns obtained in 1976, 1987, 1997 and 2005 with integrating spatial technology of geographic information system(GIS), this paper studied the dynamic change and transformation of various land use types in Fukuoka, Japan. Firstly, the characteristics of quantitative and spatial change of land use in the past 29 years were described according to spatial distribution maps, and then changing of land use extent was evaluated by a dynamic change model. The results indicate that the grade value of land use extent was situated between 2 and 4, showing that the land use extent has been transferring from extensive type to urban use type; additionally, change amount and change rate of land use extent were both greater than 0, thus, the land use extent has been situated at a developing stage. Finally, a transfer matrix of Markov was applied to analyze the transferring process of each land use type and to forecast the tendency of future land use change. The forecasting results reveal that area of urban land will continually keep rising at a gradually decreasing speed. Therefore, it will be a long process for land use extent to reach to the urbanization level.
Co-Authors HaiFeng Li Kazunori Hokao Tadashi NAGAIE Takuro INOHAE Weici Su Weijun Gao Xiaosong Lin XueRu ZHANG