Use of soil moisture resistance units in water supply forecasting

Soil moisture measuring units are used to sample the soil moisture condition under the snowpack. The data derived is used as a correction factor in preparing water supply forecasts when using water content snow survey data. Field installation procedures are discussed as to location of measurement site and placement of units at regular intervals in the soil as a stack of units. A conversion chart of ohms resistance to percent soil moisture in the several horizons of soil are illustrated. The existing network of soil moisture stations in Colorado and New Mexico river basins are mentioned in connection with their use in water supply forecasting.