Land-Use Change Analysis Using GIS in the Water-Level-Fluctuating Zone of the Three Gorges Reservoir Region: A Kai'xian County Case

2010 ◽  
Author(s):  
Chuan Huang ◽  
Li-ao Wang ◽  
Hui Yuan ◽  
Junjie Bao
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Water Level ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
Change Analysis ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Three Gorges Reservoir Region

Groundwater Dynamics Analysis of Sanmashan Side Slope in the Three Gorges Reservoir Region, China

2011 ◽  
Vol 250-253 ◽  
pp. 1744-1751
Author(s):  
Jin Guo Wang ◽  
Zhi Fang Zhou
Keyword(s):  
Water Level ◽  
Three Gorges Reservoir ◽  
Hydrodynamic Pressure ◽  
Three Gorges ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
The Three Gorges Reservoir ◽  
Side Slope ◽  
The Three Gorges ◽  
Three Gorges Reservoir Region

Sanmashan side slope in the Three Gorges reservoir region is located in the center area of the Xincheng district, Fengjie county, China. Based on the analysis of hydrogeological structure of the studied area, one can conclude that a groundwater reservoir form near the side slope area after the impoundment of the Three Gorges Reservoir, which induces large groundwater pressure on the side slope. In particular, large hydrodynamic pressure will occur in the landslide mass under the condition of the reservoir water level descending significantly, which has bad effects on slope stability. Numerical simulation results show that the seepage force on landslide is 43 times of that under normal situation, as the reservoir water level declining dramatically from 175m to 145m. Thus, the influence of hydrodynamic pressure should be considered in the stability calculation.

scholarly journals Assessment of the Impacts of Land Use Changes on Nonpoint Source Pollution Inputs Upstream of the Three Gorges Reservoir

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Huicai Yang ◽  
Guoqiang Wang ◽  
Yan Yang ◽  
Baolin Xue ◽  
Binbin Wu
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Three Gorges Reservoir ◽  
Assessment Tool ◽  
Swat Model ◽  
Land Use Changes ◽  
Regression Equation ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

In recent years, land use upstream of the Three Gorges Reservoir (TGR) has changed significantly because of the TGR project. In this study, the Soil and Water Assessment Tool (SWAT) model was examined for its ability to assess relationships between land use changes and nonpoint pollutant indexes upstream of the TGR. Results indicated that the SWAT model, calibrated with the adjusted parameters, could successfully reproduce the nonpoint indexes at the water quality monitoring sites in the two rivers. The different land use change types were shown to be sensitive to nonpoint pollutants in the study area. The land use change type from upland to water was the strongest influence on changes in total nitrogen and total phosphorus. An empirical regression equation between nonpoint indexes and different land use change types was developed for the study area by partial least squares regression (PLSR) as follows:Y=b0+∑i=1mbiXi. This regression equation was useful for evaluating the influence of land use change types on changes in nonpoint pollutants over a long time period. The results from this study may be useful for the TGR management and may help to reduce nonpoint pollutant loads into downstream water bodies.

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