Assessment of ground water quality for irrigation in Tapi command area of Dhule District: II. pH, EC and derived parameters

Abstract

The investigation was carried out on ‘Assessment of ground water quality for irrigation in Tapi command area of Dhule district’ during the year 2024-25 with the objectives to assess the pH, electrical conductivity and derived parameters in irrigation water from Tapi command area of Dhule district and to classify water for its suitability for irrigation in Tapi command area. A systemic survey was carried out in Tapi river command area and depending upon the variation in physiographic units in the study area. Total 100 irrigation water samples (open well and tube well) were collected during the month of April and May 2024 at grid of 5 km x 5 km with GPS location. The samples were analyzed in the laboratory for pH and EC, derived parameters i.e. SAR, RSC were computed by using standard procedures. The data thus obtained was interpreted with their relative properties and categorized as per ratings of irrigation water quality. In Tapi command area, 51% samples were neutral and 49% samples were moderately alkaline. Regarding electrical conductivity, 52% samples were good and 48% samples under permissible limit. The Sodium Adsorption Ratio (SAR) and Residual Sodium Carbonate (RSC) were in safe limit.