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A
surface measurement of soil moisture may be used to correct the entire soil
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moisture
profile.
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Assimilation
of soil moisture has a positive impact on the water and energy
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budgets.
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Soil
moisture assimilation performs best for regions with shallower soils;
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particularly
depths less than 3m.
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Reduction
of observation error has more positive impact than increased
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observation
frequency or resolution.
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