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Table 1

Details of sampling sites located along the main stem of the Pearl River.

Sites Name Coordinates Salinity (‰) River Width (m) Information of dams (MW)
S1 Zhuhai 113°52′12″E, 22°03′24″N Brackish water (4.62)
S2 Zhongshan 113°38′07″E, 22°52′17″N Brackish water (3.50) 938
S3 Xiaotang 112°49′25″E, 23°5′2″N Freshwater (1.20) 926
S4 Zhaoqing 112°25′12″E, 23°3′15″N Freshwater (0.17) 762
S5 Deqing 111°48′9″E, 23°8′18″N Freshwater (0.08) 826
S6 Fengkai 111°30′17″E, 23°23′47″N Freshwater (0.08) 845 Longwanba (159)
S7 Wuzhou 111°12′37″E, 23°25′53″N Freshwater (0.05) 856 Changzhouba (630)
S8 Tengxian 110°53′55″E, 23°23′5″N Freshwater (0.05) 662 Changzhouba (630)
S9 Mengjiang 110°45′42″E, 23°29′28″N Freshwater (0.04) 520
S10 Guiping 110°4′27″E, 23°25′38″N Freshwater (0.06) 460 Datengxia (1600)
S11 Wuxuan 109°40′10″E, 23°41′16″N Freshwater (0.07) 501
S12 Shilong 109°42′03″E, 24°33′12″N Freshwater (0.08) 346 Qiaogong (456)
S13 Heshan 108°52′1″E, 23°49′28″N Freshwater (0.01) 220 Letan Dam (600 MW)

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