Journal of Water Resource Engineering and Pollution Studies ISSN: 3107-8419 (Online)

Authors: Prasad Devadigaa, Thanushree A Hegde

Abstract: Infiltration is the rate at which water can enter into a soil, in our project we have used double ring infiltrometer. It consists an inner and outer ring. The main purpose is to create a one-dimensional flow of water from the inner ring. If water is flowing in 1-D at steady condition and a unit gradient is present in the underlying soil, the infiltration rate is approximately equal to the saturated hydraulic conductivity of the soil. An inner ring is driven into the ground, and outer ring driven to help control the flow of water through the first ring. Water is supplied either with a constant or falling head condition, and the operator need to records how much water infiltrates from the inner ring into the soil over a given time period. Soil samples were collected from agricultural lands of Karkala region and Nitte, and tested for basic soil properties such as specific gravity, dry density, moisture content, coefficient of permeability and percentage of clay and silt of the soil. To determine the presence of Nitrogen (N), Phosphorus (P) and Potassium (K) of soil optical transducers are used. Such transducer is useful to decide how much extra contents of these nutrients are added to the soil to increase fertility of the soil. This can improve the quality of soil and reduces the undesired use of fertilizers to be added. The N, P and K value of the sample are determined by absorption light of each nutrient.

Keywords-: Infiltration, Double ring infiltrometer, N P K, Optical transducer etc.