scholarly journals Soil Erosion Environmental Analysis of the Three Gorges Reservoir AreaBased on the “3S” Technology

2011 ◽  
Vol 10 ◽  
pp. 2218-2225
Author(s):  
Xu XiaoHua ◽  
Xu Xin-Fa ◽  
Lei Sheng ◽  
Fu ShaSha ◽  
Wu Gaowei
Keyword(s):  
Soil Erosion ◽  
Environmental Analysis ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
3S Technology ◽  
The Three Gorges

Soil erosion in the riparian zone of the Three Gorges Reservoir, China

2013 ◽  
Vol 46 (2) ◽  
pp. 212-221 ◽  
Author(s):  
Yuhai Bao ◽  
Qiang Tang ◽  
Xiubin He ◽  
Yunhua Hu ◽  
Xinbao Zhang
Keyword(s):  
Soil Erosion ◽  
Surface Runoff ◽  
Water Wave ◽  
Three Gorges Reservoir ◽  
Riparian Zone ◽  
Water Levels ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Wave Erosion

The riparian zone of the Three Gorges Reservoir (TGR) has experienced substantial erosion that may severely deteriorate the reservoir ecosystem. To calculate soil erosion characteristics, field investigations have been conducted in the TGR area and 12 erosion-monitoring transects have been set in the middle TGR. The results showed that the dominating drive forces are water wave, gravity and surface runoff. In summer when the reservoir ran at lower water levels, wave erosion led to bank instability and bank collapses. Simultaneously, due to a number of heavy storms, surface runoff erosion was also severe. In other seasons when the reservoir ran at relative higher levels reaching the highest level in winter, water wave prevailed due to the wide range of water surface and heavy waterway transportation. Soil erosion was the most severe in the mainstream where higher frequency and intensity of waves occurred. The rates of wave erosion were around 37 mm/year with the highest being 53 mm/year, and surface runoff erosion was up to 15 mm/year in the main stream riparian zone.

Soil erosion and deposition in the new shorelines of the Three Gorges Reservoir

2017 ◽  
Vol 599-600 ◽  
pp. 1485-1492 ◽  
Author(s):  
Xiaolei Su ◽  
Christer Nilsson ◽  
Francesca Pilotto ◽  
Songping Liu ◽  
Shaohua Shi ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
Erosion And Deposition ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

Soil erosion in the Three Gorges Reservoir area

Soil Research ◽  
2011 ◽  
Vol 49 (3) ◽  
pp. 212 ◽  
Author(s):  
Xibao Xu ◽  
Yan Tan ◽  
Guishan Yang ◽  
Hengpeng Li ◽  
Weizhong Su
Keyword(s):  
Soil Erosion ◽  
Three Gorges Reservoir ◽  
Storage Period ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area ◽  
Modis Ndvi ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
The Impact

Spatial and temporal change in soil erosion in the Three Gorges Reservoir area since the water storage of the reservoir began filling to 135 m in 2003 is poorly understood. Using a modified soil erosion model, this study quantifies and analyses change in the extent and intensity of soil erosion in the region from 2000 to 2008. MODIS-NDVI remote sensing data (with 250 m spatial resolution) are used in the modelling and analysis of the study. The total amount, area, and intensity of soil erosion in the reservoir region presented a declining trend from 2000 to 2008. Yet there was an anomaly in the trend, in which extreme soil erosion occurred in 2003 and lasted until 2005. The average volume of soil erosion per year decreased by 4.10 × 106 t and the mean area of land experiencing soil erosion reduced by 1129.6 km2 from the pre-storage period (2000–02) to post-storage period II (2006–08). Land suffering soil erosion at high, very high, and severe levels mainly comprises forest and cropland on slopes with gradients ≥15° and is largely distributed in the eastern and south-western sections of the reservoir area. Land experiencing soil erosion at slight or moderate levels mainly involves cropland and forest on slopes with gradients ≥10° in the central section of the reservoir area. The impact of the Three Gorges Project on soil erosion since 2000 has been mainly mediated through three mechanisms: near-resettlement of rural and urban people; increased frequency and severity of geological hazards induced by rising storage of the reservoir; and implementation of ecological projects in the region. Through the former two mechanisms, soil erosion in the affected communities has been exacerbated, while the ongoing ecological projects appear to offset both the extent and intensity of soil erosion in the reservoir region. Other important factors influencing soil erosion include urban reconstruction and expansion, varying intensity of precipitation, and soil degradation.

scholarly journals Ecological Construction Mode of Soil and Water Conservation in the Three Gorges Reservoir Area

2021 ◽  
Vol 272 ◽  
pp. 01007
Author(s):  
Xi He
Keyword(s):  
Soil Erosion ◽  
Water Conservation ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Urbanization Process ◽  
Reservoir Area ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

The Three Gorges Reservoir Area is an important ecological barrier and an important area of water conservation in China. Due to natural and man-made factors, the regional urbanization process is accompanied by soil erosion. In recent years, by actively implementing measures such as tree planting and afforestation, water and soil conservation projects, the forest coverage rate in the Chongqing Three Gorges Reservoir area has increased significantly, and soil erosion has been initially controlled. But the task of environmental protection in the Three Gorges Reservoir area is still arduous. This research analyzed the causes of soil erosion caused by the urban process, by collected and combed the data of soil erosion in the Three Gorges Reservoir area of Chongqing over the years. The causes of soil erosion in the Three Gorges Reservoir area caused by the urbanization process were deeply analyzed, we proposed to improve legislation and supervision; strengthen publicity and education of soil and water conservation; adopt new technology and technology and other governance countermeasures. The Three Gorges Reservoir is an important ecological barrier in the upper reaches of the Yangtze River. The control of soil erosion in the area has important ecological and social benefits for protecting the ecological environment of the Yangtze River Basin in China.

Impacts of forest restoration on soil erosion in the Three Gorges Reservoir area, China

2019 ◽  
Vol 697 ◽  
pp. 134164 ◽  
Author(s):  
Mingjun Teng ◽  
Chunbo Huang ◽  
Pengcheng Wang ◽  
Lixiong Zeng ◽  
Zhixiang Zhou ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Forest Restoration ◽  
Three Gorges Reservoir ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

scholarly journals Assessment of Soil Erosion Dynamics Using the GIS-Based RUSLE Model: A Case Study of Wangjiagou Watershed from the Three Gorges Reservoir Region, Southwestern China

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1817 ◽  
Author(s):  
Jinping Xue ◽  
Dongwei Lyu ◽  
Dingyong Wang ◽  
Yongmin Wang ◽  
Deliang Yin ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Soil Loss ◽  
Three Gorges Reservoir ◽  
Agricultural Watershed ◽  
Three Gorges ◽  
Rusle Model ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Three Gorges Reservoir Region ◽  
Erosion Intensity

The adjacent agricultural watershed is a vital component of the Three Gorges Reservoir Region (TGRR); however, it is affected by serious soil erosion. Assessing soil erosion dynamics in such watersheds is useful for identifying its causes and tendencies to develop, in turn providing scientific information for soil and water conservation at the regional scale. In the present study, the spatial and temporal patterns of soil erosion of a small agricultural watershed in central TGRR were investigated from 2002 to 2014 using the Revised Universal Soil Loss Equation (RUSLE) model, combined with Geographic Information Systems (GIS). The trends and processes of the overall soil erosion intensity were analyzed using spatial overlay analysis and the Markov transition matrix model, respectively. The spatial distribution of soil erosion rates within this watershed was relatively consistent during the study period. Erosion intensity was moderate, with a mean soil loss of 35.1 t·ha−1·year−1. Precipitation was a dominant factor influencing the intensity of soil erosion. Moreover, most erosion intensities shifted closely to middle grades from 2002 to 2008, and declined from 2008 to 2014, indicating that soil erosion in the Wangjiagou watershed has recently decreased. These results suggest that recently implemented integrated soil management practices were responsible for the recently observed erosion patterns.

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