کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5518470 | 1543966 | 2017 | 7 صفحه PDF | دانلود رایگان |
Optimization of field techniques is crucial to ensure high quality soil moisture data. The aim of the work is to present a sampling method for undisturbed soil and soil water content to calibrated soil moisture probes, in a context of the SMOS (Soil Moisture and Ocean Salinity) mission MIRAS Level 2 soil moisture product validation in Pampean Region of Argentina. The method avoids soil alteration and is recommended to calibrated probes based on soil type under a freely drying process at ambient temperature. A detailed explanation of field and laboratory procedures to obtain reference soil moisture is shown. The calibration results reflected accurate operation for the Delta-T thetaProbe ML2x probes in most of analyzed cases (RMSE and bias â¤Â 0.05 m3/m3). Post-calibration results indicated that the accuracy improves significantly applying the adjustments of the calibration based on soil types (RMSE â¤Â 0.022 m3/m3, bias â¤Â â0.010 m3/m3).
- A sampling method that provides high quality data of soil water content for calibration of probes is described.
- Importance of calibration based on soil types.
- A calibration process for similar soil types could be suitable in practical terms, depending on the required accuracy level.
131
Journal: MethodsX - Volume 4, 2017, Pages 243-249