Water Budget

Definition - What does Water Budget mean?

Water budget can be defined as the relationship between the inflow and outflow of water through a specified region. It gives a comparison between the supply and demand of water, making it possible to identify periods of excess and deficit precipitation. Availability of water depends on various factors such as the water cycle itself, availability of surface water in lakes, rivers, aquifers, wetlands and other water bodies and the usage of water in a region.

Knowledge of the water budget of an area is important for the planning of trenchless projects that involve the distribution of waste within a community and for other services such as supply and demand.

Trenchlesspedia explains Water Budget

Water budgets helps break down the water cycle into components to give an idea of the output, input and changes in the quantity of water. This gives a budget that helps record the amount of water deposited, water withdrawn and balance water available.

Water budgets have a few basic components, namely precipitation, which is the moisture made available from nature such as rain, hail and snow evapotranspiration, which is the water that enters the atmosphere from transpiration by plants. It also comes from the evaporation of water from soil and water bodies, surface water in streams and lakes, changes in surface water and water table levels, inter-basin transfers and the withdrawal of water for human use.

The knowledge of how much water is flowing in and flowing out helps calculate the availability of water at any given time and also helps predict stress in the water budget such as shortages and unpaid bills.

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