Transcription

2012 HIGHER EDUCATIONSUSTAINABILITY CONFERENCEWATER EFFICIENCY AND SITE WATER QUALITY

PRESENTATION OVERVIEW Cal Poly Campus OverviewCal Poly Water ResourcesEvapotranspiration (ET) Irrigation Control SystemSports Complex Artificial TurfPoly Canyon Village RestorationAgriculture Water and Waste ManagementLandfill/Mining Pit Restoration

CAMPUS OVERVIEW Land Holdings Campus Core 155 acresExtended Campus 1,666 acresSLO Creek Ranches 1,614 acresChorro Creek Ranches 3043 acresSwanton Pacific Ranch (Santa Cruz County) 3,200 acres

WATER RESOURCES 57 miles of drainages7 miles of perennial streams10 reservoirs7 wastewater ponds100 isolated areas with wetland characteristicsSprings, wells and water storage facilities3 potable water storage reservoirs (1.5M cap)Whale Rock Reservoir (13,500 acre-feet)

ET (EVAPOTRANSPIRATION) BASEDIRRIGATION CONTROL SYSTEM 32 acres Spanos Stadium Track Fields Sports Complex Reduction 20-30% water use 6 acre-feet potable ( 14,000/year) 14 acre-feet non-potable ( 300/year)

RAINMASTER EVOLUTION DX2 ETCONTROL STATION OASIS Software Automatically adjustsirrigation rates basedon ET rates Reducesmaintenance labor Inspection &adjustment Instantaneousnotification of systemmalfunction

SPORTS COMPLEX ARTIFICIAL TURF July 2009 5.7 acres replaced with artificial turf Goals Conserving water Reduced maintenance Increased playability during rainy season

SPORTS COMPLEX ARTIFICIAL TURF Artificial Turf Monofilament fibersystem crumb rubber infill,brock underlayment,sand bedding andporous aggregate subbase Perforated drainagesystem Permanent striping

POLY CANYON VILLAGE RESTORATION 2700 on-campushousing beds (30 acres) 4 acre site 12,000 native speciesplanted Temporarily dripirrigated 100 cubic yards ofmulch

PLANTING

AGRICULTURE WATER AND WASTEMANAGEMENT Discharge of animal waste 40 acre-feet storage from 2009-10 rain year Improvement in Discharge Reservoir Level Balance Compost Animal Bedding Utilized on campus landscape and in fields and pastures March 2012 – begin bagging compost from animalmanure Since Mid-April 2012 – sold 500 bags (1.5 cubic-feet or 50lbs)

DAIRY WASTEWATER 240 Dairy Cows Solid Separation 30,000 gallons/dayin washwater 34 acre-feet/year Sprayfield Discharge WDRs under RWQCBpermit

AG IRRIGATION MANAGEMENT Irrigation ManagementStudy Upgrades to existing Wells Replaced with variablefrequency drive, allowswater pressure toincrease/decrease gradually Well Flow Meters 8 meters installed Regular monitoring andmetering of electricity Rain Catchment Complete 2013 Reduce groundwaterwithdrawals

LANDFILL/MININGSTORMWATER CONTROLSWater Retention - before

Water Retention - after

DETENTION BASINS

STRAW WATTLES

CURTAIN DRAINBEFOREAFTER

RIPARIAN ENHANCEMENT

RIPARIAN ENHANCEMENT Riparian HabitatImprovement 200 container plants 1000 ft of riparianfencing replaced On-going projects Competing weeds Animal management

GENERAL No increase in indoor water usage since 2004/05 –including addition of 2,700 beds of on-campushousing Reduction of campus core irrigation water use by14% since 2009 Reduction of Agricultural water use by 20% since2009

COSTS ET Irrigation Control System – 12,000Sports Complex Artificial Turf – 4 millionPoly Canyon Village Restoration - 265,000Agriculture Irrigation Upgrades - 175,000Improvements to wells, springs & reservoirs - 175,000Riparian Enhancement Project - 222,000 ( 130,000SWRCB 319(h) Grant)

REDUCTIONS Potable Irrigation Water – 14% reduction 45 acre feet/year (15 MILLION gallons) Non-potable Water – 20% reduction 130 acre feet/year (42 MILLION gallons) Improved Stormwater 20 acre feet/year (6.5 MILLION gallons) Reclaimed/Recycled Water (Dairy) 34 acre feet/year (11 MILLION gallons) Reclaimed Water – Sprayfields 40 acre feet/year (13 MILLION gallons)

SAVINGS Potable Water Savings (Irrigation) 107,000/year (at 5,44/hcf) Non-Potable Water Savings (Irrigation) 2,800/year (at 0.05/hcf) Non-Potable Water Savings (Recycled) 1,600/year (at 0.05/hcf) TOTAL Savings 111,400hcf hundred cubic feet (748.05 gallons)

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