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What Is a Water Footprint?

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Muller, Tia, Water Footprint, 9-26-2015

Publié dans : Formation
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What Is a Water Footprint?

  1. 1. What is a Water Footprint? What is blue, green, and gray water? Blue water, green water, and gray water categorize where our water comes from and its use. These classifications include water ex- tracted from rivers, lakes, and groundwater; rainwater used directly by crops; and water needed to dilute polluted water into usable condition, respectively. Each of these classifications can be found during the production of hogs. A water footprint is a measure of the amount of water used to produce goods and services and the water impacted by the system. It can cover a process, product, or even a whole company. Analysis of water footprints depend on the boundaries of the system, recognizing the footprint for a barn is a component of the footprint for a county, which is a component of the water footprint for a state. Every sector from agriculture to industry has a water footprint; the analysis of these footprints varies depending on how specific the target of investigation is. There are direct and indirect uses of water. Footprints are direct if they evaluate the amount of water a person or product uses in an immediate situation. Indirect footprints tally the water usage of an entire process. The water consumed by hogs in a barn would be an illustration of a direct water footprint, whereas the water it takes to run a hog operation is an indirect water footprint. The Pig Production Environmental Calculator gives producers data in gallons of water used. These gallons are divided into a total, per pig per year, and per pound live pig produced per year. The full results page will also divide water consumption between specific production components such as feed, management, and general water usage. This section of re- sults is also where producers are able to categorize their water into blue, green, and gray. NPB Pig Production Environmental Calculator Tia Muller, Agricultural Engineering Student, South Dakota State University Abigail Repenning, Agricultural Engineering Student, South Dakota State University Ashley Schmit, Animal Science Student, University of Nebraska-Lincoln Amy Millmier Schmidt, Livestock Bioenvironmental Engineer, University of Nebraska-Lincoln Erin Cortus, Agricultural Engineer, South Dakota State University Richard Stowell, Livestock Housing Engineer, University of Nebraska-Lincoln The Pig Production Environmental Footprint Calculator was developed with grant support (#2011-68002-30208) from the USDA National Institute of Food and Agriculture. Barn Water – Blue Water Feed – Green Water Manure Digester – Gray Water Example screen from the NPB Pork Environmental Footprint Calculator Water Usage for this farm Farm: Gestation Barn and Lagoon How can I use this information? Producers benefit from having the data represented in gallons and separated into categories because they then have the ability to pinpoint specific areas of their operation where adjustments can be made. These adjustments could include cutbacks to direct water usage or possibly using alternative functions to lessen their footprint. Although the Pig Production Environmental Calculator gives a good estimate of water footprint it cannot produce exact results. This noted, hog producers around the United States can still improve their operation efficiency while being environmentally conscious by using results from the calculator.