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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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