The movement of water into and out of a lake as described by a balance equation in which the change in storage of water equals the rate of inflow from all sources minus the rate of loss.
the accounting of the inflows and outflows of water to and from a system.
An accounting of the inflow to, outflow from, and storage changes of water within a system, such as a watershed or aquifer
a fundamental means of describing and quantifying the amounts and movement of water in the hydrologic cycle
Calculation of the inflow, outflow, and storage of groundwater and surface water for a basin or water resources unit to determine the availability of water.
A hydrological formula used by scientists and land managers to determine water surpluses and deficits in a given area. Jump to Top
An accounting of the inflow to, outflow from, and storage changes of water in a hydrologic unit.
a study of the movement of water through precipitation, evaporation, transpiration and runoff.
An irrigation tool that keeps track on a daily basis of the amount of plant available water in the soil over a 12-month period. It sums soil water depletion by evapotranspiration using one of the climatonomic estimators and deducts water inputs from precipitation or irrigation. This yields the amount of irrigation water that needs to be applied to bring the soil back to field capacity within the root zone of the crop being irrigated. Water applications in excess of field capacity are assumed lost to percolation or rum-off.
The depth of annual precipitation to cover an area. In the U.S. it is 30 inches. List of Glossary Terms
See hydrologic accounting.
A description and quantification of the quality and movement of water in the hydrologic cycle within a specified geographic area. The product is often portrayed as a "balance sheet" of water in and water out in a dynamic system.
A budget of the incoming and outgoing water from a region, including rainfall, evaporation, runoff, and seepage; often used to estimate evapotranspiration.
is a hydrologic term which refers to the annual cycle of surplus and deficit soil moisture as a result of precipitation and evapotranspiration