Can I read Methods to Estimate Soil Hydraulic Parameters for Regional-Scale Applications of Mechanistic Models on EtoBox?

Methods to Estimate Soil Hydraulic Parameters for Regional-Scale Applications of Mechanistic Models by Dennis J. Timlin; L. R. Ahuja; Robert D. Williams is a book available to read on EtoBox.

What is Methods to Estimate Soil Hydraulic Parameters for Regional-Scale Applications of Mechanistic Models about?

The use of mechanistic models at regional scales requires parameters that represent the soil hydraulic properties of the area and their variability. Because of the large number of samples required to characterize an extensive area such as a watershed, methods to estimate soil hydraulic properties from simpler data or from a small number of measurements are alternatives to making extensive field measurements. Readily available data that can be used to obtain hydraulic parameters include soil texture, bulk density, porosity, and 33 kPa water content. The choice of estimation method depends on the type of data available and the possibility of making field measurements. Examples of estimating certain important parameters are presented. Finally, a method of assessing the quality of the estimations must be chosen. The correlation of measured properties with estimated is not always the best method. Because a simulation model integrates the effects of soil hydraulic properties with climate variables and, if simulated, with plant factors, the targeted output should be the basis of comparisons. The results of simulations carried out using a soybean model, GLYCIM, indicate that estimated soil

Author

Dennis J. Timlin; L. R. Ahuja; Robert D. Williams

Publisher

Soil Science Society of America

Published

2015

Language

EN