Geofluids / 2018 / Article / Tab 1

Research Article

A Regional Scale Investigation on Groundwater Arsenic in Different Types of Aquifers in the Pearl River Delta, China

Table 1

Descriptive statistics of groundwater parameters in different types of aquifers.

ItemTotal ()Granular aquifer ()Fissured aquifer ()Karst aquifer ()
MinMaxMeanSDMinMaxMeanSDMinMaxMeanSDMinMaxMeanSD

pH3.77.76.10.83.87.76.20.73.77.75.80.74.57.06.00.7
EC (μS/cm)22.06510.0464.7489.830.06510.0562.0542.022.02600.0289.2314.878.0918.0285.5246.1
DO (mg/L)0.68.23.51.40.68.23.31.40.87.83.91.41.76.03.71.4
Eh (mV)−200.0330.075.883.4−34.0298.066.979.7−200.0330.089.086.8−7.0262.0126.397.2
TDS (mg/L)17.13733.9368.2396.329.53733.9457.7454.217.1864.4207.1168.760.0797.9220.9213.4
TH (mg/L)4.91040.8135.3124.06.91040.8169.2135.14.9329.572.764.110.0362.395.197.6
K+ (mg/L)0.2119.918.319.90.4119.921.220.60.3116.813.317.70.230.010.610.8
Na+ (mg/L)0.51008.836.488.41.51008.847.2108.20.585.517.517.61.847.413.412.7
Ca2+ (mg/L)1.6262.542.437.52.0262.552.840.01.6114.823.221.82.4122.630.933.2
Mg2+ (mg/L)118.57.011.70.2118.58.913.842.23.54.30.713.64.34.0
(mg/L)2.9748.1126.8134.22.9748.1161.5146.83.0426.863.473.23.0368.582.3103.6
Cl (mg/L)2.22042.858.5163.43.52042.876.0201.12.2122.327.627.15.357.321.716.5
(mg/L)324.330.537.8324.339.142.0132.414.120.775.825.428.3
(mg/L)333.531.435.3333.532.636.7153.930.133.50.653.519.819.4
(mg/L)33.200.442.1833.200.622.684.730.120.540.080.020.03
(mg/L)9.860.631.489.860.821.658.360.261.033.350.440.98
F (mg/L)1.290.130.151.290.150.170.610.090.100.370.090.11
I (mg/L)1.620.040.120.660.040.081.620.030.180.030.010.01
(mg/L)60.001.044.7460.001.555.852.400.130.371.120.140.33
Fe (mg/L)41.100.552.6941.100.753.308.070.200.750.520.130.15
Mn (mg/L)3.410.230.483.410.300.552.840.110.300.010.210.060.06
Al (mg/L)6.830.200.616.830.210.683.140.190.520.200.080.06
As (mg/L)0.30300.00500.02430.30300.00720.03010.02100.00100.00270.00250.00040.0007

SD: standard deviation; –: below the limit of detection.

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