1 / 7

Millers Rainwater Project

Millers Rainwater Project. Briarcliff Raingarden. After. Before. Plymouth Pond. After. Before. Storm Comparison #1: Hydrographs. 2003. Total Rain: 0.6 inches in 2 hours prior to highest flow 1 inches total of rain received on April 4. Note: plymouth transducer was offline.

kiara-miranda
Télécharger la présentation

Millers Rainwater Project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Millers Rainwater Project Briarcliff Raingarden After Before

  2. Plymouth Pond After Before

  3. Storm Comparison #1: Hydrographs 2003 Total Rain: 0.6 inches in 2 hours prior to highest flow 1 inches total of rain received on April 4 Note: plymouth transducer was offline Total Rain: 0.62 inches in 2 hours prior to highest flow 0.97 inches total of rain received on May 11-May 13. 2010 Prior moisture conditions: In 2003, off and on rains occurred throughout the day of the storm. In 2010, off and on rain occurred throughout 2 days prior to the storm. Both years had substantial rains 6 days prior to dates shown on graph.

  4. Watershed size: 1.519 mi2 Storm Comparison #1: Water Calculations for Glazier Way study site April 4, 2003 May 13, 2010 • Inches of rain during storm:0.62 inches • Total amount of rain:2,188,216 ft3 • Percent of rain leaving system via stream: :52% (1,131,702 ft3) • Percent of rain trapped in BMPs, soil, plants, ponds, or evaporated: • 48% (1,056,514 ft3) • Percent of rain trapped in 75 rainbarrels (assuming they fill completely):0.03% (602 ft3) • Percent of rain absorbed by Thurston Elementary Raingarden:0.01% (191 ft3) • Percent of rain absorbed by Briarcliff Raingarden:0.10% (2,118 ft3) • Peak Flow: 131 cfs • Time from peak rain to peak flow: • 1 hour, 20 min • Rate of flow increase, once flow started to increase: • Approx 1 cfs/ min • Length of time it takes to return to pre-storm flow: • 43 hours 28 min • Rate of flow decrease for 2 hours after peak flow: • Approx 0.7 cfs/min • Inches of rain during storm: 0.70 inches • Total amount of rain:2,470,258 ft3 • Percent of rain leaving system via stream: • 43% (1,064,717 ft3) • Percent of rain trapped in soil, plants, ponds, or evaporated: • 57% (1,405,541 ft3) • Peak Flow:184 cfs • Time from peak rain to peak flow:5 min • Rate of flow increase, once flow started to increase: • Approx 1.5 cfs/min • Length of time it takes to return to pre-storm flow: • 14 hours 6 min • Rate of flow decrease for 2 hours after peak flow: • Approx 1.3 cfs/min

  5. Storm Comparison #2: Hydrographs Total Rain: 0.4 inches in 2 hours (plus an additional 0.1 inches earlier in the day) 2003 Total Rain #1 : 0.5 inches mostly within 2 hours Peak Flow: 42 cfs Time from peak rain to peak flow: 2 hours Total Rain #2 : 0.42 inches mostly within 1 hours Peak Flow: 49 cfs Time from peak rain to peak flow: 1 hr, 24 min 2010 Prior moisture conditions: 2003 had only minor precipitation throughout March. 2010 had a major storm (about 1 inch rain) five days prior to dates shown on graph.

  6. Watershed size: 1.519 mi2 Storm Comparison #2: Water Calculations for Glazier Way study site March 20, 2003 May 7, 2010 (note: these numbers are for the second peak, indicating pre-existing wet conditions • Inches of rain during storm:0.42 inches • Total amount of rain:1,482,155 ft3 • Percent of rain leaving system via stream: :Difficult to determine w/ 2 rain peaks • Percent of rain trapped in BMPs, soil, plants, ponds, or evaporated: • Difficult to determine w/ 2 rain peaks • Peak Flow: 49 cfs • Time from peak rain to peak flow: • 1 hour, 24 min • Rate of flow increase, once flow started to increase: • Approx 0.61 cfs/ min • Length of time it takes to return to pre-storm (peak 1) flow: • 48 hours • Rate of flow decrease for 2 hours after peak flow: • Approx 0.26 cfs/min • Inches of rain during storm: 0.4 inches • Total amount of rain:1,411,576 ft3 • Percent of rain leaving system via stream: • 29% (414,465 ft3) • Percent of rain trapped in soil, plants, ponds, or evaporated: • 71% (997, 111 ft3) • Peak Flow:82 cfs • Time from peak rain to peak flow:19 min • Rate of flow increase, once flow started to increase: • Approx 1.1 cfs/min • Length of time it takes to return to pre-storm flow: • 48 hours • Rate of flow decrease for 2 hours after peak flow: • Approx 0.6 cfs/min

  7. Storm Comparison #3: Hydrographs Total Rain: 0.4 inches in 3 hours (first peak only) with 0.2 inches in 1 hour 2003 Total Rain: 0.40 inches in 5 hours (first peak only) With 0.19 inches in 1 hour. 2010

More Related