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. Author manuscript; available in PMC: 2018 Mar 16.
Published in final edited form as: J Hydrol (Amst). 2016 Nov 27;544:428–437. doi: 10.1016/j.jhydrol.2016.11.052

Figure 9.

Figure 9

Number of wells required to represent the spatial mean at four different absolute error level as a function of their extent at (a) 0.25 degree, (b) 0.5 degree and (c) 1 degree-scale. The number within the squares indicating basin numbers (Table 1) corresponding to their extent and number of wells