Impacts of soil-water conservation in Jialing River on sedimentation of the Three Gorges Reservoir

2006 ◽  
Vol 11 (4) ◽  
pp. 922-928 ◽  
Author(s):  
Lei Xiaozhang ◽  
Cao Shuyou ◽  
Jiang Xiaohua
Keyword(s):  
Soil Water ◽  
Water Conservation ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Jialing River

Influence of the Three Gorges Reservoir Filling at 175m Scheme on Chongqing Water Transportation

2012 ◽  
Vol 209-211 ◽  
pp. 786-791
Author(s):  
Jing Li Yang ◽  
Hua Fu ◽  
Yao Chang Ma ◽  
Yun Yun Yang
Keyword(s):  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
Chongqing Municipality ◽  
Water Transportation ◽  
The Three Gorges ◽  
Reservoir Impoundment ◽  
Jialing River ◽  
Reservoir Filling

Jialing River flows into Yangtze River at main city zone of Chongqing Municipality, evolutional mechanism of rivers near the confluence site obviously shows some estuary properties. In September 2008, the Three Gorges Reservoir experimented to fill water at 175m, thus, rivers near the Chongqing Municipality are located in the upper or middle area of fluctuating backwater region and alternatively behave as reservoirs or natural rivers. On the basis of field experimental data of the reservoir impoundment process, the properties of sediment transport of some key harbors were investigated to study the waterway characters. The results show that most of the rivers took place silting. The specific results are that, at the Jiulongpo and the Jinshaqi areas, the sediment deposition grew higher 1-2m and 1-3m, respectively, and at the Zhuerqi zone, there was a few silting. The disadvantages of long-term impoundment process of the Three Gorges Reservoir on water transportation should be further explored in time.

scholarly journals Modeling the Effect of Different Forest Types on Water Balance in the Three Gorges Reservoir Area in China, with CoupModel

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 654
Author(s):  
Zhi Yang ◽  
Fang Hou ◽  
Jinhua Cheng ◽  
Youyan Zhang
Keyword(s):  
Water Balance ◽  
Soil Water ◽  
Three Gorges Reservoir ◽  
Chinese Fir ◽  
Oak Forest ◽  
Deep Percolation ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Water Recharge

Precipitation, throughfall, stemflow, and soil water content were measured, whereas interception, transpiration, evaporation, deep percolation, and soil water recharge were estimated in three plots, including oak (Lithocarpus glaber), Chinese fir (Cunninghamia lanceolata) forestlands, and maize (Zea mays) farmland in the Three Gorges Reservoir in China. A physical process-based model (CoupModel) was set up with climatic measurements as input and was calibrated with throughfall and vertical frequency domain reflectometry measurements from January 2018 to December 2019. Simulated values of soil moisture were fairly consistent with measured ones, with a determination coefficient (R2) of 0.73–0.91. Evapotranspiration was the main output of water balance, with a percentage of up to 61%, and such output was ranked as follows: oak forest (720 mm/y) > Chinese fir forest (700 mm/y) > maize farmland (600 mm/y). Afforestation influenced water balance, and water recharge was generally less significant in oak forestland than in Chinese fir forestland. Annual simulated deep percolation decreased by 60 mm for oak and 47 mm for Chinese fir compared with that for farmland (452 mm/y) and even more significantly in wet years. This decrease was mainly attributed to increased interception (122–159 mm/y) and transpiration (49–84 mm/y) after afforestation. Simulations indicated that vegetation species significantly influenced the magnitude of water balance components, calling for further attention to the selection of regrown tree species in the planning for afforestation projects, particularly for such projects that aim to improve the quantity of water infiltrating groundwater. Soil and water conservation measures should also be applied scientifically when converting farmland to forest in this area, particularly in the oak forest stand.

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.

Seasonal variation and longitudinal distribution characters of cladocerans in the Three Gorges Reservoir

2009 ◽  
Vol 17 (5) ◽  
pp. 512
Author(s):  
Wu Hui-xian ◽  
Yao Jian-liang ◽  
Liu Yan ◽  
Xue Jun-zeng ◽  
Cai Qing-hua ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Three Gorges Reservoir ◽  
Longitudinal Distribution ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

Preliminary Effects of Impounding on Vegetation in Drawdown Zone of the Three Gorges Reservoir Region

2010 ◽  
Vol 30 (3) ◽  
pp. 303-314 ◽  
Author(s):  
Zhi-Jun LU ◽  
Lian-Fa LI ◽  
Han-Dong HUANG ◽  
Min TAO ◽  
Quan-Fa ZHANG ◽  
...  
Keyword(s):  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Three Gorges Reservoir Region ◽  
Drawdown Zone
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