Compost Effects on Water Quality and Quantity in Residential Areas - PowerPoint PPT Presentation

Dec 25, 2022 •573 likes •777 views

Compost Effects on Water Quality and Quantity in Residential Areas Jovana Radovanovic February 25, 2020 About 1,000 people move to Florida every day Currently: 21.3 million Growth rate: 1.66% It takes 65+ days to build a

Compost Effects on Water Quality and Quantity in Residential Areas Jovana Radovanovic February 25, 2020
• About 1,000 people move to Florida every day • Currently: 21.3 million • Growth rate: 1.66% • It takes 65+ days to build a house from start to finish
• Central Florida Water Initiative • 3 water management districts in FL are studying whether the Floridan aquifer system is reaching its sustainable limits of use • 2035 demands: deficit is ~250 mgd • Solutions to decrease Milesi, Cristina, et al. 2012 demand? Water Supply Sustainability Index (2050) Projected Changes in Water Withdrawals (2005-2060) 2014 National Climate Assessment 2014 National Climate Assessment
On Top of the World Communities Ocala, Florida SWFWMD Average: 250 gal/home/day Currently there are 6,000 homes OTOW permit: 150 gal/home/day OTOW currently: 190 gal/home/day Buildout of 30,000 homes
Treatments • 24 homes • 7 compost, 8 till, 9 control • Treatments were applied before landscaping • Compost is incorporated into the top 6 inches at 4 yd 3 / 1000 ft 2
Storm Drains • 8 storm drains equipped with weir boxes • Uniform treatment in drainage area • ISCO 6712 autosamplers
Compost Tilled Control min 0.0000013 0.00000096 0.000017783 median 0.017068591 0.015565055 0.019040968 average 0.012028934 0.014015526 0.014734999 max 0.50989244 1.845858808 2.244518268
Leachate • Lysimeters installed during construction • Invert: 12” below soil surface • Pumped monthly • Samples analyzed for TN & TP
Soil Moisture Sensors • 12 soil moisture sensors • Collect volumetric water content within top 6” • 25% reduction in irrigation run time • Return to 100% run time at any time
Conclusion • Runoff • Trends based off of 17 sampled events • Leachate • Leachate loading may be driven by differences in leachate volume rather than nutrient concentrations • Soil Moisture • Differences in volumetric water content across the three treatments • So What? • Is there potential to further decrease irrigation? • What will results from 14 months of runoff vs rainfall data show?
Questions? Jovana Radovanovic Masters Student jradovanovic@ufl.edu

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