Spatial Scaling of Soil Moisture, Evapotranspiration, and Leakage

Michael Puma, Michael Celia, Ignacio Rodriguez-Iturbe, Jan Nordbotten, Andrew Guswa & Michael Puma
An outstanding issue in ecohydrological modeling is scaling nonlinear plant-level interactions among soil, vegetation, and water to larger spatial scales. Spatial heterogeneity in precipitation and vegetation exert significant control on scaling properties, especially in water-limited ecosystems. Computational results indicate that relationships between spatially averaged variables controlling soil-moisture dynamics are non-unique at larger averaging scales, even when unique, non-hysteretic relationships are defined at the plant level. The complexity of these relationships evolves with increasing averaging area...
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