S8_11-15-04

• Basin: Statewide
• Title: SWSI Phase 1 Report - Section 8 Options for Meeting Future Water Needs
• Date: 11/15/2004
• Author: CWCB
• SWSI - Doc Type: Final Report

Section 8
Options for Meeting Future Water Needs
^ Does not use higher quality drinking water
for irrigation.
Potential issues and concerns include:
^ Can be very expensive.
^ Must have consumable effluent to reuse or
identified return flows.
^ Wastewater treatment plant needs to be
near irrigation demands.
^ Must have storage to regulate year round
effluent flows and meet demands during
~~~i~{. ::- irrigation season.
Water
fe`'~`"' ^ As M&I users develop or expand the reuse
of existing reusable return flows via water
Figure 8-6 rights exchanges less water may be
Irrigation Reuse available to downstream users.
Potential benefits of non-potable reuse include:
^ Improves M&I reliability.
^ Maximizes successive uses of water.
^ Maximizes beneficial use of water.
^ May not require new diversion structures.
^ Lesser environmental impacts than a new water
supply project.
2
1.8
1.6
1.4
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~ 1.2
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0 0.8
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0.6
0.4
0.2
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^ Previously unused reusable effluent historically
resulted in reduced or morejunior river calls
controlling the river.
^ River calls may become more senior, impacting all
users.
^ Public acceptance of the reuse of effluent for
landscape irrigation must be achieved.
Percent of Reusable Effluent Used for Nonpotable Landscape Irrigation
Figure 8-7
Total Yield from Non-potable Reuse of 1 AF of Consumable Water
Based on One-time Reuse for Landscape Irrigation
J~~a
$~ole'ri~ice Wo~e' $upplY Initia~ive
~~
S:\REPORT\WORD PROCESSING\REPORT\S8 11-9-04.DOC H-~ 7
Consumpfion on Consumpfian on
autdoor Uses Indaor Uses
~ ~
Muniaipal &
Industrial U'sers
0% 20% 40% 60% 80% 100%