# 1.1: Applying the Math of UDA


“Will I ever use UDA in real life?” This sort of question usually pops into the heads of students in all subjects, but in math, it happens quite often. In a practical sense, UDA can be looked at as converting between currencies. If you travel to Europe for example, you will want to know how many Euros equal a dollar. Or you may want to figure out how fast you are driving, in which case you would need to convert kilometers per hour into miles per hour.

However, in the “world” of water, converting of units is commonplace. The following few questions are written with the perspective of “real world” scenarios.

## Exercises

A water utility manager has been asked to prepare an end of year report for the utility’s Board of Directors. The utility has 4 groundwater wells and two connections to a surface water treatment plant. Complete the table below.

 Source of Supply Flow Rate (gpm) Daily Operation (Hrs) Total Flow (MGD) Annual Flow (AFY) Well 1 800 10 Well 2 1,000 8 Well 3 650 16 Well 4 2,250 11 SW Pump 1 1,750 7 SW Pump 2 1,500 9

Using the information from the above problem, fill in the table below.

 Source of Supply Annual Production (AFY) Cost per AF ($/AF) Total Annual Cost ($) Well 1 60 Well 2 60 Well 3 95 Well 4 95 SW Pump 1 450 SW Pump 2 450 Total Annual Cost
 Connection Type Number of Connections Average usage per day per connection (gallons) Average Monthly Usage per Connection Type (CCF) Residential 835 Commercial 1,370 Industrial 2,200

This page titled 1.1: Applying the Math of UDA is shared under a CC BY license and was authored, remixed, and/or curated by Mike Alvord (ZTC Textbooks) .