Table 1 The location of the sample point.

From: Characterization and evaluation of Fe2+ and Mn2+ in reservoirs and sediments in the Jianghuai Region

Sampling point

Latitude

Longitude

Da 1

117.2277689

31.91628819

Da 2

117.2396565

31.91770885

Da 3

117.2423601

31.92200712

Da 4

117.2369957

31.93726801

Da 5

117.2194004

31.94691858

Mo 1

116.8503285

31.70148052

Mo 2

116.8577957

31.70122493

Mo 3

116.8597269

31.69625912

Mo 4

116.8481827

31.69395869

Mo 5

116.8584824

31.69136607

Mo 6

116.8646193

31.69771968

Dong 1

117.2014618

31.88586623

Dong 2

117.1568298

31.89942072

Dong 3

117.1986294

31.89417406

Dong 4

117.1901321

31.8805459

Dong 5

117.1860981

31.89060324

Dong 6

117.1782017

31.89694317

Zhong 1

117.4089146

32.05108011

Zhong 2

117.4262524

32.04242269

Zhong 3

117.4367237

32.04249545

Zhong 4

117.4323463

32.03420102

Zhong 5

117.4267674

32.02670629

Zhong 6

117.4414444

32.0277978