Technological innovations in construction of underground caverns in basaltic rocks at Baihetan Hydropower Station on Jinsha River

Fan, Qixiang; Wang, Zhilin; He, Wei; Peng, Lin; Wang, Hongbin; Xu, Jianrong; Duan, Hang

doi:10.1360/sst-2021-0053

Cited by 8 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Lu et al [6], the main source of NH 3 -N in the Jinsha River is domestic sewage, whereas agricultural pollution is not prominent. Qiaojia County, where Baihetan Dam is located, was once one of the poorest areas in China [25]. It is located in a remote mountainous area with poor transportation.…”

Section: Concentrations Of Pollutantsmentioning

confidence: 99%

“…The population was small, and various industries were underdeveloped, so the living conditions of local residents were poor and the amount of domestic sewage produced was small. However, according to Fan et al [25], the construction of Baihetan Dam not only improved the local transportation conditions but also brought USD 260 million in investment for Qiaojia County, which considerably contributed to the development of the local economy and the improvement of living standards. Therefore, domestic sewage generated in Qiaojia County and the emissions of NH 3 -N increased.…”

Section: Concentrations Of Pollutantsmentioning

confidence: 99%

See 1 more Smart Citation

Ecological Risk Evaluation of Baihetan Dam Based on Fuzzy Hazard Quotient Model

Feng

Yang

et al. 2022

Water

View full text Add to dashboard Cite

To evaluate the variation in ecological risk induced by pollutants from the construction of Baihetan Dam, the largest hydropower station under construction in the world, this study proposes a fuzzy hazard quotient (HQ) model designed on the basis of triangular fuzzy number (TFN) theory. The fuzzy HQ model uses hazardous TFN to evaluate the ecological risk including uncertain observation data, and the transition TFN to analyze the variation in ecological risk before and after the dam construction. The results show the following: (i) The ecological risk of ammonia nitrogen (NH3-N) showed a marked increasing trend after the construction of the dam because this activity weakened the degradation ability of the water body. The chronic hazard of NH3-N was classified as “medium” grade and its acute hazard was “low” grade. (ii) The crucial acute hazard factor for the local aquatic ecosystem was copper (Cu) and the key chronic hazard factor was lead (Pb). (iii) After the construction of Baihetan Dam, both the long-term and short-term hazardous TFNs of Cu were classified as “medium” grade. The acute hazard of Pb belonged to “low” grade with high certainty, whereas its chronic hazard classification had uncertainties. Its long-term hazardous vectors upstream were {0.000, 0.928, 0.072}, whereas its long-term hazardous vectors downstream were {0.000, 0.108, 0.892}. (iv) Both of the ecological risks of Cu and Pb showed substantial decreasing trends after the construction of Baihetan Dam because the impounding effect of Baihetan Dam promoted the settlement of heavy metals with sediment. (v) The hazardous TFN method can be applied to perform an ecological risk evaluation that accounts for uncertainties in the observation data set, and the transition TFN method can analyze the variation in ecological risk with a small sample size. Therefore, the fuzzy HQ model is effective for the evaluation of ecological risk induced by dam construction.

show abstract

Section: Concentrations Of Pollutantsmentioning

confidence: 99%

Section: Concentrations Of Pollutantsmentioning

confidence: 99%