WaterSmart Workshops Strategies for Water-Efficient Landscapes

Transcription

1 WaterSmart Workshops Strategies for Water-Efficient Landscapes San Diego Gas & Electric, Energy Innovations Center May 13-14, 2015 Carlos Michelon Principal Water Resources Specialist

2 Overview 1. Drought Update (8:15 A.M.) 2. WaterSmart Resources (3:45 P.M.) 2

3 3

4 San Diego County Water Authority Wholesale water agency created by State Legislature in 1944 o o o 24 member agencies Serves 3.1 million people and region s $191 billion economy 97% of county s population Mission is to provide safe and reliable water supply to member agencies 4

5 LAKE SHASTA State Water Project (Bay-Delta) 20% LAKE OROVILLE Colorado River 63% Local Supplies 17% 5

6 Northern Sierra Snowpack (As of April 1, 2015) Water Content (in) % of Normal Snowpack's Water Content at Record Low April 1, 2015 Manual Snow Survey Normal (AP Photo/Rich Pedroncelli) 6

7 175% Average Water Year Statewide Runoff Percent of Average (Water Year: Oct 1 Sept 30) 173% 150% 125% 100% 146% 4 th Consecutive Dry-Year % 91% 50% 25% 53% 60% 65% 62% 59% 35% 40%? 0% * 2016 *DWR Apr. 1, 2015 Forecast for Water Year 7

8 Water Authority Drought Response Orderly and Coordinated Approach to Managing Droughts 8

9 Current Activities Influencing Potential Drought Response Actions in 2015/2016 Supply availability from MWD 15% cutback allocation FY Exceedance surcharges: up to $2,960/AF Demand reductions required statewide Governor's April 1 Executive Order: 25% water savings mandate SWRCB emergency regulations 9

10 NEW Emergency Regulations Agencies report potable usage compared to 2013 Compliance measured monthly beginning June 2015 Exempt agricultural deliveries 10

11 Drought Management Actions Tentative Schedule Date April 14 April 18 April 22 April 28 May 5-6 May 14 June 1 July 1 Action MWD Board approved Level 3, 15% supply cutback SWRCB Draft regulations released for comment Deadline for comments on draft regulations SWRCB emergency rulemaking formal notice SWRCB hearing and adoption Water Authority Special Board meeting Mandatory conservation regulation takes effect MWD allocation period begins 11

12 Water Waste Prohibitions Following actions prohibited: 1. Watering of outdoor landscapes that cause excess runoff 2. Using hose to wash motor vehicle, without shut-off nozzle 3. Washing down driveways and sidewalks 4. Use of potable water in fountains or water features unless it is recirculating (Except for health and safety purposes) 12

13 Q: What is Annual Rainfall in San Diego? Avg. Rainfall in San Diego = 10 inches/year (data from )

14 What is the local ET o in San Diego? Zone 1 (33 ) Zone 4 (47 ) 4 6 Zone 6 (50 ) 9 Zone 9 (55 )

15 Water Applied vs. Plant Water Use Water Waste! Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Actual Plant Water Use Landscape Water Applied

16 Is this the right Norm?

17 17

18

19 Multiple Benefits Water efficiency Runoff reduction Embedded energy Green waste reduction Reduced green house gas emissions Habitat restoration Labor reduction

20 Before After 20

21 Typical Single-Family Use Outdoor 53% Indoor 47% Source: 2007 SF End Use Study - CA 21

22 AB 1881 Water Efficient Landscape Ordinance An objective water budget methodology: MAWA = (ETo)x(.62)x((ETAF 0.7)x(Landscape Area)+(0.3)x(SLA)) ETWU = (ETo) x (.62) x PF x HA/IE) Maximum Applied Water Allowance Gallons per year depends on Estimated Total Water Usage in gallons Should be less than MAWA Evapotranspiration Size of Area Irrigation System Efficiency Plant Factor

23

24 WaterSmart Resources eguide WaterSmartSD.org

25 Services

26 26

27

28 Weather Based ( Smart ) Res: $80/unit Base rebate $35/station Central Computer Base rebate $35/station Soil Moisture Sensor System Base rebate $35/station

29 Rotating Spray Nozzles Base rebate $4 per nozzle Large Rotary Nozzles Base rebate $13/set

30 Online application process $2 per sq/ft Some Agencies may: Add funding Apply local rules

31 Carlos Michelon Principal Water Resources Specialist San Diego County Water Authority (858)