Thematic issue: water environment of the Three Gorges Reservoir

Zheng, Binghui; Qin, Yanwen; Liu, Defu; Norra, Stefan; Wang, Shengrui

doi:10.1007/s12665-017-7105-8

Cited by 12 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Particularly, in the Three Gorges Reservoir (TGR) behind Three Gorges Dam -the world's largest dam, algal bloom have been observed in most tributary bays since the initial water storage in 2003 (Fu et al, 2010;Stone, 2008). The dominant algal species have changed from diatom and dinoflagellates to the recent toxic cyanobacterial (Zheng et al, 2017). The high frequency and wide distribution of algal bloom in the TGR have seriously affected the aquatic ecosystem and people living in the catchment (Hao et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The influence of hydraulic characteristics on algal bloom in three gorges reservoir, China: A combination of cultural experiments and field monitoring

et al. 2022

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

The influence of hydraulic characteristics on algal bloom in three gorges reservoir, China: A combination of cultural experiments and field monitoring

et al. 2022

Self Cite

View full text Add to dashboard Cite

“…Especially after the operation of the reservoir, with changes in the hydrological state of the reservoir area, the water environment safety of the area is facing more and more pressure. Water pollution incidents occur frequently, and the frequency and harm are increasing year by year, which brings some hidden dangers to the water environment safety of the reservoir area [10][11][12][13][14]. Industrial sewage and domestic sewage, agricultural non-point source pollution, and mobile ship pollution are the three main pollution sources affecting the water quality of the Three Gorges Reservoir area, among which industrial sewage and domestic sewage account for the largest proportion.…”

Section: Introductionmentioning

confidence: 99%

Identification and Evaluation of Water Pollution Risk in the Chongqing Section of the Three Gorges Reservoir Area in China

et al. 2022

View full text Add to dashboard Cite

The Three Gorges Reservoir is the largest freshwater resource reservoir in China. The water environment security in the Three Gorges Reservoir area has a prominent position in the major national strategy for the protection of the Yangtze River. Based on the pressure–state–response (PSR) model, this study comprehensively considers the dangerousness of risk source, the sensitivity of risk receptors, and the acceptable level of regional environmental risk to construct the grading evaluation index system of water environment pollution risk. By using spatial statistical methods, including the variation coefficient method and cold–hot spot pattern analysis, the risk distribution of water environment pollution in the Chongqing section of the Three Gorges Reservoir area was comprehensively identified and evaluated by administrative units. The results showed that: (1) the number of risk sources was largest in Yunyang County and the number of risk receptors was largest in Wanzhou District. However, the distribution of high-risk pollution sources and high-sensitivity receptors was most intensive in the main urban area and surrounding areas of Chongqing, and the regional environmental risk acceptance level was the lowest. (2) The statistical results of risk source dangerousness and the risk receptor sensitivity index at the county level in the study area showed an aggregated distribution pattern, with hotspot areas concentrated in the main urban area of Chongqing and the surrounding area in the upper reaches of the reservoir area. Moreover, the acceptable level of risk in this area showed a cold spot area, while other regions basically showed a balanced distribution pattern without forming significant hot spot or cold spot areas. (3) The high-risk river section of water pollution in the reservoir area comprised five counties, including Jiulongpo District, Yubei District, Shapingba District, Yuzhong District and Nanan District; the middle-risk river section comprised six counties, including Changshou District, Beipei District, Jiangbei District, Dadukou District, Fuling District and Shizhu County; and the low-risk river sections were mainly distributed in the Jiangjin District in the upper reaches of the reservoir area and the middle and lower reaches of the northeast ecological area of Chongqing. Therefore, the acceptable levels of water pollution risk sources, receptors and regional environmental risks in the Chongqing section of the Three Gorges Reservoir area are unevenly distributed, showing an aggregated distribution pattern. The spatial distribution of water environment pollution risk is uneven, and the significant potential risk area is the functional core area of Chongqing, which is the critical area of water environment risk management in the future.

show abstract

“…As one of the greatest hydro-junction engineerings in the world, the Three Gorges Project (TGP) plays a crucial role in the development and governs the hydrological regime in the Yangtze River basin, and has produced remarkable economic and social benefits [1,2]. However, after the operation of the TGP since 2012, the natural regime, in terms of the hydrology and water environment characteristics in the Three Gorges Reservoir Area (TGRA), has been vastly changed, resulting in a series of water environmental problems which could have arisen due to the following reasons: (1) After its 175 m experimental impoundment, the water flow rate is reduced (the residence time is prolonged), the turbulent diffusion capacity is diminished and the self-purification capacity is reduced [1,3]. (2) Due to the high-density urban agglomeration along the TGRA, unreasonable livestock and poultry breeding and agricultural production activities result in a large amount of non-point source (NPS) pollution that has not been effectively disposed of [4].…”

Section: Introductionmentioning

confidence: 99%

Spatial Variation Pattern Analysis of Hydrologic Processes and Water Quality in Three Gorges Reservoir Area

Chen

Zhang

et al. 2019

Water

View full text Add to dashboard Cite

The Three Gorges Project (TGP) has greatly enhanced the heterogeneity of the underlying surface in the Three Gorges Reservoir Area (TGRA), thereby affecting the hydrologic processes and water quality. However, the influence of the differences of underlying surfaces on the hydrologic processes and water quality in the TGRA has not been studied thoroughly. In this research, the influence of the heterogeneity of landscape pattern and geographical characteristics on the spatial distribution difference of hydrologic processes and water quality in the different tributary basins of the TGRA was identified. The TGRA was divided into 23 tributary basins with 1840 sub-basins. The spatial differentiation of the hydrologic processes and water quality of the 23 tributary basins was examined by the Soil and Water Assessment Tool (SWAT). The observed data between 1 January 2010 and 31 December 2013 were used to calibrate and validate the model, after which the SWAT model was applied to further predict the runoff and water quality in the TGRA. There are 25 main model parameters, including CN2, CH_K2 and SOL_AWC, which were calibrated and validated with SWAT-Calibration and Uncertainty Procedures (SWAT-CUP). The landscape patterns and geomorphologic characteristics in 23 tributary basins were investigated and spatially visualized to correlate with surface runoff and nutrient losses. Due to geographical difference, the average total runoff depth (2010-2013) in the left bank area (538.6 mm) was 1.4 times higher than that in the right bank area (384.5 mm), total nitrogen (TN) loads in the left bank area (6.23 kg/ha) were 1.9 times higher than in the right bank area (3.27 kg/ha), and total phosphorus (TP) loads in the left bank area (1.27 kg/ha) were 2.2 times higher than in the right bank area (0.58 kg/ha). The total runoff depth decreased from the head region (553.3 mm) to the tail region (383.2 mm), while the loads of TN and TP were the highest in the middle region (5.51 kg/ha for TN, 1.15 kg/ha for TP), followed by the tail region (5.15 kg/ha for TN, 1.12 kg/ha for TP) and head region (3.92 kg/ha for TN, 0.56 kg/ha for TP). Owing to the different spatial distributions of land use, soil and geographical features in the TGRA, correlations between elevation, slope gradient, slope length and total runoff depth, TN and TP, were not clear and no consistency was observed in each tributary basin. Therefore, the management and control schemes of the water security of the TGRA should be adapted to local conditions.

show abstract

Thematic issue: water environment of the Three Gorges Reservoir

Cited by 12 publications

References 24 publications

The influence of hydraulic characteristics on algal bloom in three gorges reservoir, China: A combination of cultural experiments and field monitoring

The influence of hydraulic characteristics on algal bloom in three gorges reservoir, China: A combination of cultural experiments and field monitoring

Identification and Evaluation of Water Pollution Risk in the Chongqing Section of the Three Gorges Reservoir Area in China

Spatial Variation Pattern Analysis of Hydrologic Processes and Water Quality in Three Gorges Reservoir Area

Contact Info

Product

Resources

About