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Table 4 The average annual decline rate of groundwater level for observation wells

From: Geostatistical interpolation model selection based on ArcGIS and spatio-temporal variability analysis of groundwater level in piedmont plains, northwest China

Period

Average annual decline rate

Land use

Agricultural area

Residential area

Industrial area

River area

2001–2006

0.51

0.35

0.77

0.65

0.25

2007–2013

2.06

0.65

1.28

2.34

3.95

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