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Illustration of the method for calculating the spatial variability of the lake ecological status and the grid cell representativeness from simulation results. Selection of four dates (step 1), calculation of the lake ecological status in each grid cell based on the five variables for one set of randomly selected sampling dates (step 2) and calculation of grid cell representativeness based on each variable (step 3). These steps were repeated for 1000 sets of randomly selected sampling dates.
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