Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.
-
Upload
willa-julia-lamb -
Category
Documents
-
view
214 -
download
1
Transcript of Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.
![Page 1: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/1.jpg)
Water Quality in Water Quality in Stormwater Retention Stormwater Retention Ponds on UWB CampusPonds on UWB Campus
Rick Vos
![Page 2: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/2.jpg)
I would like to thank the I would like to thank the following people for their following people for their valuable assistance on this valuable assistance on this project:project:Dr. Dan JaffeJohn HawthorneJoel Pothoff of UWB Physical PlantHal Hoffman
![Page 3: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/3.jpg)
Historical DataHistorical Data Impervious surface area in the North
Creek Basin while hard to measure, has increased from an estimated 26.4% in 1996 (May 1997) to roughly 49% today. (Kerwin 2001)
There has been a general increase in temperature and conductivity since 1979. (King County WLRD 2001)
Only 23% of land in North Creek Basin remains forested.(Kerwin 2001)
![Page 4: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/4.jpg)
Objective:Objective:
To determine the water quality discharged from UWB campus into North Creek by measuring N03, PO4, pH and conductivity in retention ponds.
Compare values with historical data from North Creek.
![Page 5: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/5.jpg)
GIS 2000
UWB Sampling LocationsUWB Sampling Locations
![Page 6: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/6.jpg)
Experimental Method:Experimental Method: Phosphate and Nitrate were measured
using Hach DR/2010 Portable Data Logging Spectrometer with Hach PhosVer® 3 Phosphate Reagent and NitraVer ® 5 Nitrate Reagent AccuVac® ampoules.
Cole-Palmer Basic Conductivity Meter model # 19815-10.
pH measured using an Oakton Phtestr®
![Page 7: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/7.jpg)
Quality AssuranceQuality Assurance Known standard solutions were prepared
for both nitrate (NO3-) and phosphate (PO4).
Prior to each test a sample blank was prepared and used for zeroing and a standard sample was used to check DR/2020.
A 147 µ S standard was prepared for calibration of the Cole-Palmer Conductivity meter. Meter was calibrated every 40 hours.
The Oakton pH tester was calibrated using a 7.0 buffer solution weekly.
![Page 8: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/8.jpg)
Phosphate Comparison
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
13-May 15-May 17-May 19-May 21-May 23-May 25-May 27-May 29-May 31-May
Collection Date & Time (PDT)
Concentration (mg/L)
*Pond 1 Phosphate
*Pond 2 Phosphate
*North Creek Phosphate
![Page 9: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/9.jpg)
Nitrate Comparison
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
13-May 15-May 17-May 19-May 21-May 23-May 25-May 27-May 29-May 31-May
Collection Date & Time (PDT)
Concentration (mg/L)
*Pond 1 Nitrate
*Pond 2 Nitrate
*North Creek Nitrate
![Page 10: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/10.jpg)
pH Comparison
6
6.5
7
7.5
8
8.5
9
9.5
13-May 15-May 17-May 19-May 21-May 23-May 25-May 27-May 29-May 31-May
Collection Date & Time (PDT)
pH
Pond 1 phPond 2 phNorth Creek phph limits (WAC 173-01a)
![Page 11: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/11.jpg)
What does this mean?What does this mean?
–Nitrate levels are lower in ponds
–Phosphate levels are generally lower in ponds than North Creek
–pH levels have exceeded required WAC 173-01a at all sampling sites.
![Page 12: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/12.jpg)
Conductivity Comparison
0
50
100
150
200
250
13-May 15-May 17-May 19-May 21-May 23-May 25-May 27-May 29-May 31-May
Collection Date & Time (PDT)
Co
nd
uct
ivit
y (µ
S)
Pond 1 Conductivity
Pond 2 Conductivity
North Creek Conductivity
![Page 13: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/13.jpg)
Input flow to Sampling Sites on UWB CampusInput flow to Sampling Sites on UWB Campus
![Page 14: Water Quality in Stormwater Retention Ponds on UWB Campus Rick Vos.](https://reader033.fdocuments.us/reader033/viewer/2022042822/5697bff71a28abf838cbe6eb/html5/thumbnails/14.jpg)
In ConclusionIn Conclusion