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A. C. Davison, Yadolah Dodge, and N. Wermuth

Print publication date: 2005

Print ISBN-13: 9780198566540

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198566540.001.0001

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Stochastic soil moisture dynamics and vegetation response

Stochastic soil moisture dynamics and vegetation response

(p.55) 2 Stochastic soil moisture dynamics and vegetation response
Celebrating Statistics

Amilcare Porporato

Ignacio Rodríguez-Iturbe

Oxford University Press

This chapter describes work on a stochastic soil moisture model that has been used to investigate the relationship between the hydrologic and vegetation dynamics ecohydrology in water-controlled ecosystems. Such systems are complex evolving structures whose characteristics and dynamic properties depend on many links between climate, soil, and vegetation. After a discussion of the soil water balance and a brief account of rainfall modeling, infiltration, and runoff, evapotranspiration and drainage are sketched. The probabilistic modeling of the soil moisture process and of long-term water balance are discussed, followed by minimalist modeling of soil moisture dynamics. The chapter concludes with a brief account of plant water stress, with an application to the Kalahari precipitation gradient.

Keywords:   ecohydrology, hydrology, Kalahari, plant water stress, rainfall, runoff, soil moisture, soil water balance, vegetation

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