Feature | Beaches | ||
---|---|---|---|
Los Algodones | San Francisco | Miramar | |
Type of site | Bay | Open beach | Bay |
Beach length used | ~1.8 km | ~1.5 km | ~1 km |
Beach area used | ~9000 m2 | ~7500 m2 | ~5000 m2 |
Coast type | Micromareal (tidal range < 1 m) | Micromareal (tidal range < 1 m) | Micromareal (tidal range < 1 m) |
Wave height | < 1 m | < 1 m | <1 m |
Surrounding land | Shrubs Sand dunes | Shrubs Sand dunes | Mangrove forest Urban development |
Residential | Residential | Residential | |
Human activity | Hotel | Trails | Hotel |
Trails | Streets | ||
Commerce | Commerce | ||
Domestic animals | Domestic animals | Domestic animals | |
Animals | Sea birds | Sea birds | Sea birds |
Horses | |||
Summertime: Southeast | Summertime: Southeast | Summertime: Southeast | |
Prevailing winds | Wintertime: Northwest | Wintertime: Northwest | Wintertime: Northwest |
Summertime: Southeast | Summertime: Southeast | Summertime: Southeast | |
Prevailing coastal currents | Wintertime: Northwest | Wintertime: Northwest | Wintertime: Northwest |
< 300 mm yr−1 | < 300 mm yr−1 | < 300 mm yr−1 | |
Annual rainfall and seasonal distribution | Mostly summertime | Mostly summertime | Mostly summertime |
Sewage discharges identified | No | No | Yes |
Stormwater mixed with wastewater | Likely influence | Likely influence | Yes |
Ships | Occasional | Occasional | Occasional |
Los Algodones | San Francisco | Miramar | |||||||
---|---|---|---|---|---|---|---|---|---|
Min.–Max | Average | SD | Min.–Max | Average | SD | Min.–Max | Average | SD | |
Temperature (°C) | 17.6–31.5 | 21.50 | 4.74 | 18.3–31.5 | 21.81 | 4.23 | 17.2–30.4 | 21.53 | 4.41 |
Salinity (PSU) | 30.3–36.8 | 35.08 | 1.93 | 29.7–36.8 | 34.97 | 1.84 | 30.4–36.9 | 35.13 | 1.89 |
Dissolved oxygen (mgl−1) | 3.2–7.5 | 6.19 | 1.38 | 3.4–7.7 | 6.26 | 1.26 | 5.8–8.1 | 7.04 | 0.71 |
pH | 7.8–8.6 | 8.28 | 0.25 | 7.8–8.7 | 8.32 | 0.30 | 7.4–8.7 | 8.31 | 0.33 |
95th percentile value of intestinal enterococci/100 ml (rounded values) | Estimated risk per exposure |
---|---|
0–40 | < 1% GI disease risk/< 0.3 AFRI risk |
41–200 | 1–5% GI disease risk/0.3–1.9% AFRI risk |
201–500 | 5–10% GI disease risk/1.9–3.9% AFRI risk |
> 500 | > 10% GI disease risk/> 3.9% AFRI risk |
GI: Gastrointestinal, AFRI: Acute febrile respiratory illness |