Skip to main content Accessibility help
×
Home
Hostname: page-component-56f9d74cfd-wh2kg Total loading time: 0.643 Render date: 2022-06-26T12:22:59.188Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "useRatesEcommerce": false, "useNewApi": true }

2 - Stochastic soil moisture dynamics and water balance

Published online by Cambridge University Press:  14 October 2009

Ignacio Rodríguez-Iturbe
Affiliation:
Princeton University, New Jersey
Amilcare Porporato
Affiliation:
Duke University, North Carolina
Get access

Summary

This chapter presents a probabilistic model for the temporal dynamics of soil moisture, with the goal of providing a simplified yet realistic description amenable to analytical solutions. Such an analysis is the necessary starting point for the quantitative understanding of the impacts of soil moisture on ecosystems' dynamics, such as the vegetation response to water stress, the hydrologic control on cycles of soil nutrients, and the dynamics of plant competition for water. The same approach may also be useful to obtain insights into other processes closely related to soil moisture dynamics, such as soil–atmosphere interactions, soil production, and soil gas emissions.

The probabilistic soil moisture model that we describe in this chapter was originally proposed by Rodríguez-Iturbe et al. (1999a) and improved by Laio et al. (2001a). Here all the various physical processes involved in the soil moisture dynamics, the simplifying assumptions, and their related implications are discussed in detail. Particular attention is devoted to the role of soil properties and plant transpiration characteristics.

The solution of the problem in probabilistic terms, which is made necessary by the introduction of the stochastic representation of rainfall, is carried out for statistically steady-state conditions during a growing season. The results allow assessment of the roles of climate, soil, and vegetation on the soil moisture probability density function (pdf) and on the average long-term water balance. The chapter closes with a brief discussion of possible simplifications of the soil moisture dynamics that are of interest when considering the large-scale water balance.

Type
Chapter
Information
Ecohydrology of Water-Controlled Ecosystems
Soil Moisture and Plant Dynamics
, pp. 15 - 58
Publisher: Cambridge University Press
Print publication year: 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)
1
Cited by

Save book to Kindle

To save this book to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×