Using automated soil water content measurements to estimate soil water budgets

Soil Water Content Monitoring Using Electromagnetic Induction

The use of electromagnetic ~EM! induction measurements was evaluated to predict water content in the upper 1.50 m of a prototype engineered barrier soil profile designed for waste containment. Water content was monitored with a neutron probe, and bulk soil electrical conductivity was monitored with a Geonics EM38 ground conductivity meter at ten locations at approximately monthly intervals over...

Response of a New Soil Water Sensor to Variable Soil, Water Content, and Temperature

Thomas (1966) and later developed by Dean et al. (1987), whose work has lead to commercial soil water The success of time domain reflectometry (TDR) has led to the measuring instruments (Evett and Steiner, 1995; Paltidevelopment of other instruments that use the soil dielectric constant as the basis for determining volumetric soil water content. An example neanu and Starr, 1997). Readers are re...

Time Stability of Soil Water Content

Predicting water content using Gaussian model on soil spectra

This paper presents an approach to estimating soil moisture content through fitting an inverted Gaussian function to the continuum in soil spectra. The soil moisture Gaussian model (SMGM) estimates the water content by the declining reflectance in the near infrared (NIR) and shortwave infrared (SWIR) regions, 1.2–2.5 Am, due to the spreading of the fundamental water absorption at 2.8 Am. Convex...

Assessing the Performance of Thermal Inertia and Hydrus Models to Estimate Surface Soil Water Content

The knowledge of soil water content (SWC) dynamics in the upper soil layer is important for several hydrological processes. Due to the difficulty of assessing the spatial and temporal SWC dynamics in the field, some model-based approaches have been proposed during the last decade. The main objective of this work was to assess the performance of two approaches to estimate SWC in the upper soil l...