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Impact of sensor placement in soil water estimation: a real-case study
- Source :
- Irrigation Science. 41:395-411
- Publication Year :
- 2023
- Publisher :
- Springer Science and Business Media LLC, 2023.
-
Abstract
- One of the essential elements in implementing a closed-loop irrigation system is soil moisture estimation based on a limited number of available sensors. One associated problem is the determination of the optimal locations to install the sensors such that good soil moisture estimation can be obtained. In our previous work, the modal degree of observability was employed to address the problem of optimal sensor placement for soil moisture estimation of agro-hydrological systems. It was demonstrated that the optimally placed sensors can improve the soil moisture estimation performance. However, it is unclear whether the optimal sensor placement can significantly improve the soil moisture estimation performance in actual applications. In this work, we investigate the impact of sensor placement in soil moisture estimation for an actual agricultural field in Lethbridge, Alberta, Canada. In an experiment on the studied field, 42 soil moisture sensors were installed at different depths to collect the soil moisture measurements for one growing season. A three-dimensional agro-hydrological model with heterogeneous soil parameters of the studied field is developed. The modal degree of observability is applied to the three-dimensional system to determine the optimal sensor locations. The extended Kalman filter (EKF) is chosen as the data assimilation tool to estimate the soil moisture content of the studied field. Soil moisture estimation results for different scenarios are obtained and analyzed to investigate the effects of sensor placement on the performance of soil moisture estimation in the actual applications.
- Subjects :
- FOS: Computer and information sciences
Soil Science
Systems and Control (eess.SY)
Statistics - Applications
Electrical Engineering and Systems Science - Systems and Control
Computer Science - Computers and Society
Optimization and Control (math.OC)
Computers and Society (cs.CY)
FOS: Electrical engineering, electronic engineering, information engineering
FOS: Mathematics
Applications (stat.AP)
Mathematics - Optimization and Control
Agronomy and Crop Science
Water Science and Technology
Subjects
Details
- ISSN :
- 14321319 and 03427188
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Irrigation Science
- Accession number :
- edsair.doi.dedup.....ed54a81017d2ae6d237fca64b663c55b