Coefficient of Storage for Unconfined Aquifer Calculator

The Coefficient of Storage for Unconfined Aquifer formula is defined as the specific yield in the context of unconfined aquifers, is a dimensionless measure that represents the volume of water released from or taken into storage per unit surface area of the aquifer per unit change in the head (water level). For unconfined aquifers, this coefficient is a critical parameter because it directly impacts groundwater availability and movement and is represented as S'' = S_y+(γ/1000)*(α+η*β)*B_s or Coefficient of Storage for Unconfined Aquifer = Specific Yield+(Unit Weight of Fluid/1000)*(Compressibility+Porosity of Soil*Compressibility of Water)*Saturated Thickness of Aquifer. Specific Yield is the amount of water that can be extracted from an aquifer per unit of its volume. It is a crucial parameter in assessing the sustainable yield of groundwater resources, Unit Weight of Fluid is the weight of a fluid per unit volume. For water at standard conditions (4°C), fundamental for analyzing and designing various water-related structures and systems, Compressibility is the measure of how much a material, such as soil or water-bearing formations (aquifers), can decrease in volume under pressure, Porosity of Soil is the ratio of the volume of voids to the total volume of the soil. Porosity is a crucial parameter in hydrology as it influences the movement and storage of water within the soil, Compressibility of Water is the ability of water to decrease in volume under the application of pressure. It is quantified by the bulk modulus of elasticity & Saturated Thickness of Aquifer is the vertical distance between the top of the saturated zone and the base of the aquifer, which is typically defined by an impermeable layer or boundary.