HomeMy WebLinkAboutWater Budget Calculator_Common Open SpaceSECTION 3 - WATER BUDGET AREA CALCULATOR for the Common Open Space and 19th Ave. R.O.W.4/3/2025
The Water Budget Area is the Total Lot Area minus the Building Footprint, Walkways, Hardscape (e.g. sidewalk, pavers, or driveway),
Exemptions (e.g. edible gardens or retention ponds), and Artificial Plant Material areas.
Category Area (sq. ft.)
Total Lot Area 25,539
Building Footprint 0
Hardscape (e.g. sidewalk or
pavers)4,701
Walkways 0
Exemptions (e.g. retention
pond)0
Artificial Plant Materials 0
Water Budget Area (sq. ft.)20,838
WATER BUDGET CALCULATOR
Hydrozones are a portion of the landscaped area which has plants with similar water needs grouped together that are typically irrigated by one valve or station with the same
irrigation type.
When different plant factors are grouped in one hydrozone, the highest plant factor determines the hydrozone water use category.
For example, 0.1 and 0.3 plant factor species hydrozoned together would be placed into the low, or 0.3, hydrozone water use category.
Another example, drip irrigation with temporary overhead irrigation would be placed into the drip irrigation's hydrozone water use category.
Bare mulch areas are included as part of its adjacent hydrozone to account for any future plantings in that area.
Section 3 Water Budget Calculator for developments subject to BMC 38.550.040 (e.g. plats, site plans, planned development zones).
Water budget not to exceed 8 gal/square foot.
Water Budget Area (sq. ft.)20,838
Hydrozone Water Use
Category
Plant Factor
(PF)Net ETo Irrigation
Type
Irrigation
Efficiency
Irrigation
gallons per
sq. ft.
Sq. Ft.Water Use
(gal)
Percent of Total
Water Budget
Area
Percent of
Total
Irrigation
Demand
Zone #
Low 0.3 26Drip 0.9 5.4 2,924 15,712 14%27%1C
Low 0.3 26Drip 0.9 5.4 2,204 11,843 11%20%2C
Low 0.3 26Drip 0.9 5.4 2,298 12,348 11%21%3C
Low 0.3 26Drip 0.9 5.4 2,660 14,293 13%24%4C
Total Area 10,086
Tree Water Calculator
Tree Water Use
Category
Plant Factor
(PF)Net ETo Irrigation
Efficiency
Irrigation
gallons per
sq. ft.
Number of
Trees Sq. Ft.Water Use
(gal)
Percent of Total
Water Budget
Area
Percent of
Total
Irrigation
Demand
Zone #
Low 0.3 26 0.9 5.4 5 140 752 1%1%5C
Low 0.3 26 0.9 5.4 10 280 1,505 1%3%6C
Low 0.3 26 0.9 5.4 8 224 1,204 1%2%7C
Low 0.3 26 0.9 5.4 10 280 1,505 1%3%8C
TOTAL WATER USE 59,160
GAL/SF (AVG)2.8
Not to exceed 8 GAL/SF.
Reference Tables
Plant Factor Reference Table*Irrigation Efficiency Table
Plant Type
Hydrozone
Water Use
Category
Selected
Plant Factor
(PF)
Irrigation
Type
Irrigation
Efficiency
Turfgrass cool season/water
features High 0.8 Overhead 0.7
Annual Flowers High 0.8 Drip 0.9
Warm season turfgrass Medium 0.6
Woody plants and herbacious
perennials Medium 0.6
Drought adapted woody
plants and herbacious
perennials Low 0.3
Drought Tolerant Very Low 0.1
Areas with temporary
irrigation only
Temporary
Irrigation 0.1
*Refer to plant list for exact species plant factors.