Building a large dam: identifying the relationship between catchment area and slope using the confidence ellipse approach

Liu, Suning1; Chen, Ji2; Li, Jiaye3; Li, Tiejian4; Shi, Haiyun5; Sivakumar, Bellie4,6

2023-01-11

10.1186/s40562-022-00260-9

Geoscience Letters   Impact Factor & Quartile

2196-4092

2196-4092

With the population projections indicating continued growth during this century, construction of large dams can be considered as one of the best available options to meet the future increases in water, food, and energy demands. While there are reports that thousands of large dams will be built in the near future, a key question is: what are the appropriate conditions for selecting the sites for these dams? The site of a large dam should be carefully evaluated based on many factors, such as socioeconomic development, water resources availability, topographic characteristics, and environmental impacts. This study aims to partly address the above question through identifying the relationship between two topographic characteristics (i.e., catchment area and slope) of a river reach to build a large dam based on the 30-m-resolution global drainage networks. The information about 2815 existing large dams from the Global Reservoir and Dam (GRanD) database is collected for analysis. The confidence ellipse approach is introduced to establish the quantitative relationship between these two variables, which is then used to evaluate the site selection of a large dam from the perspective of topographic characteristics. The results show that: (1) each large dam can well correspond to the nearest river reach in the global drainage networks and (2) the logarithmic values of catchment area and slope can be well described by a confidence ellipse, which is obtained based on the means, standard deviations, and Pearson correlation coefficients of the two variables. The outcomes of this study will be of great value for policymakers to have a more comprehensive understanding of large dam development in future.

Large dams Topographic characteristics Global drainage networks Confidence ellipse

SCI

English

Corresponding

[JCYJ20210324105014039]

Geology ; Meteorology & Atmospheric Sciences

Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences

WOS:000912365500001

SPRINGER

2-s2.0-85146246012

Web of Science

1.Inst Basic Sci, Ctr Climate Phys, Pusan, South Korea
2.Univ Hong Kong, Dept Civil Engn, Hong Kong, Peoples R China
3.Dongguan Univ Technol, Sch Environm & Civil Engn, Dongguan, Guangdong, Peoples R China
4.Tsinghua Univ, Dept Hydraul Engn, Beijing, Peoples R China
5.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen Key Lab Precis Measurement & Early Warnin, Shenzhen, Guangdong, Peoples R China
6.Indian Inst Technol, Dept Civil Engn, Mumbai, India

Liu, Suning,Chen, Ji,Li, Jiaye,et al. Building a large dam: identifying the relationship between catchment area and slope using the confidence ellipse approach[J]. Geoscience Letters,2023,10(1).

Liu, Suning,Chen, Ji,Li, Jiaye,Li, Tiejian,Shi, Haiyun,&Sivakumar, Bellie.(2023).Building a large dam: identifying the relationship between catchment area and slope using the confidence ellipse approach.Geoscience Letters,10(1).

Liu, Suning,et al."Building a large dam: identifying the relationship between catchment area and slope using the confidence ellipse approach".Geoscience Letters 10.1(2023).