Table 3.
Characteristic of stormwater drain and catch basin (no. examined for specific characteristic) | No. (%) with characteristic | No. (%)Ae. aegypti immatures collected | No. (%) Cx. quinquefasciatus immatures collected |
---|---|---|---|
Size (1,761)a | |||
Small | 19 (1.1) | 344 (1.5) | 418 (1.1) |
Medium | 1,724 (97.9) | 21,342 (91.5) | 32,957 (83.9) |
Large | 18 (1.0) | 1,627 (7.0) | 5,894 (15.0) |
Drainage pipe (1,761) | |||
Missing | 739 (42.0) | 19,111 (82.0) | 20,011 (51.0) |
Vertical | 317 (18.0) | 452 (2.0) | 3,313 (8.4) |
Horizontal | 705 (40.0) | 3,750 (16.0) | 15,945 (40.6) |
Well (connected to drainage pipe if this is present) (1,761) | |||
Present | 419 (23.8) | 1,081 (4.6) | 6,839 (17.4) |
Absent | 1,342 (76.2) | 22,232 (95.4) | 32,430 (82.6) |
Status of walls (1,761) | |||
Finished and impermeable | 878 (49.9) | 8,488 (36.4) | 11,929 (30.4) |
Unfinished and permeable | 883 (50.1) | 14,825 (63.6) | 27,340 (69.6) |
Trash items (1,761) | |||
Present | 402 (22.8) | 15,956 (68.4) | 22,401 (57.0) |
Absent | 1,359 (77.2) | 7,357 (31.6) | 16,868 (43.0) |
Water quality (262)b | |||
Clear | 54 (20.6) | 5,503 (23.6) | 8,638 (22.0) |
Turbid | 208 (79.4) | 17,810 (76.4) | 30,631 (78.0) |
Water odor (262)b | |||
Present | 139 (53.0) | 13,717 (58.8) | 19,177 (48.8) |
Absent | 123 (47.0) | 9,596 (41.2) | 20,092 (51.2) |
Water volume (262)b | |||
≤10 liters | 27 (10.3) | 799 (3.4) | 994 (2.5) |
>10 liters | 235 (89.7) | 22,514 (96.6) | 38,275 (97.5) |
Water pH (262)b | |||
≤7 | 102 (38.9) | 7,671 (32.9) | 17,306 (44.1) |
>7 | 160 (61.1) | 15,642 (67.1) | 21,963 (55.9) |
Water temperature (262)b | |||
≤25 °C | 12 (4.6) | 68 (0.3) | 7,343 (18.7) |
26–27 °C | 68 (25.9) | 11,325 (48.6) | 11,079 (28.2) |
28–29 °C | 153 (58.4) | 11,063 (47.4) | 20,093 (51.2) |
≥30 °C | 29 (11.1) | 857 (3.7) | 754 (1.9) |
Percentage of shade (262)b | |||
0% | 217 (82.8) | 18,594 (79.8) | 26,165 (66.7) |
25% | 22 (8.4) | 2,270 (9.7) | 4,450 (11.3) |
50% | 19 (7.3) | 2,164 (9.3) | 4,554 (11.6) |
100% | 4 (1.5) | 285 (1.2) | 4,100 (10.4) |
Types of organic matter present (262)b | |||
Primarily wood | 2 (0.7) | 165 (0.7) | 39 (0.1) |
Primarily grass | 7 (2.7) | 440 (1.9) | 1,179 (3.0) |
Primarily leaves | 197 (75.2) | 21,202 (90.9) | 33,792 (86.0 ) |
Primarily fruits | 7 (2.7) | 385 (1.7) | 2,811 (7.2) |
Primarily flowersUnrecognizable | 6 (2.3)43 (16.4) | 772 (3.3)349 (1.5) | 641 (1.6)806 (2.1) |
Status of organic matter (262)b | |||
Primarily intact | 156 (59.5) | 21,668 (92.9) | 27,433 (69.9) |
Primarily decomposed | 106 (40.5 ) | 1,645 (7.1) | 11,836 (30.1) |
Small: ~1.0 m length × 0.5 m width × 0.7 m depth; Medium: ~ 2.0 m length × 0.5 m width × 0.7 m depth; Large: ~ 4.0 m length × 0.5 m width × 0.7 m depth.
Based on 262 stormwater drains and catch basins that held water at the time they were examined.