Fig. 1. Water retention curve of Tottori dune sand for drying from saturation. Fitted line is the van Genuchten retention function, ( - _r)/(_s - _r) = [1 + (|h|)ⁿ]^-1+1/n, with _s = 0.35, _r = 0.05, = 0.05, and n = 5.2.

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