Checking for non-preferred file/folder path names (may take a long time depending on the number of files/folders) ...

Calibration of soil moisture sensing with subsurface heated fiber optics using numerical simulation

Owners: This resource does not have an owner who is an active HydroShare user. Contact CUAHSI ( for information on this resource.
Type: Resource
Storage: The size of this resource is 1.4 MB
Created: Mar 31, 2018 at 8:02 p.m.
Last updated: Apr 09, 2018 at 8:37 p.m.
Citation: See how to cite this resource
Sharing Status: Public
Views: 1559
Downloads: 42
+1 Votes: Be the first one to 
Comments: No comments (yet)


The heat pulse probe method can be implemented with actively heated fiber optics (AHFO) to obtain distributed measurements of soil water content (θ) by using reported soil thermal responses measured by Distributed Temperature Sensing (DTS) and with a soil‐specific calibration relationship. However, most reported applications have been calibrated to homogeneous soils in a laboratory, while inexpensive efficient in situ calibration procedures useful in heterogeneous soils are lacking. Here we employed the Hydrus 2‐D/3‐D code to define a soil‐specific calibration curve. We define a 2‐D geometry of the fiber optic cable and the surrounding soil media, and simulate heat pulses to capture the soil thermal response at different soil water contents. The model was validated in an irrigated field using DTS data from two locations along the FO deployment in which reference moisture sensors were installed. Results indicate that θ was measured with the model‐based calibration with accuracy better than 0.022 m3 m−3.

Raw project data is available by contacting

Subject Keywords


How to Cite

Benitez-Buelga (2018). Calibration of soil moisture sensing with subsurface heated fiber optics using numerical simulation, HydroShare,

This resource is shared under the Creative Commons Attribution CC BY.


There are currently no comments

New Comment