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Table 4 Variation in water depth, velocity, and water level of the screened watercourses across different months (Kafr El-Sheikh, 2019)

From: Determinants of Schistosoma mansoni transmission in hotspots at the late stage of elimination in Egypt

Variable

Month n (%)

χ2

P

July

August

September

November

Depth (m)

  < 0.5 m

29.0 (25.9)

40.0 (35.7)

17.0 (15.2)

26.0 (23.2)

32.04

 < 0.001**

 0.5–1 m

3.0 (14.3)

3.0 (14.3)

10.0 (47.6)

5.0 (23.8)

  > 1 m

13.0 (27.7)

2.0 (4.3)

18.0 (38.3)

14.0 (29.8)

Water velocity (m/s)

  > 1 m3/s

0.0 (0.0)

5.0(100.0)

0.0 (0.0)

0.0 (0.0)

14.61

0.002**

 0.5–1 m3/s

3.0 (100.0)

0.0 (0.0)

0.0 (0.0)

0.0 (0.0)

  < 0.5 m3/s

4.0 (20.0)

7.0 (35.0)

9.0 (45.0)

0.0 (0.0)

 Still

38.0 (25.0)

33.0 (21.7)

36 (23.7)

45.0 (29.6)

Water level

 Flooded

0.0 (0.0)

0.0 (0.0)

9.0 (90)

1.0 (10)

55.15

 < 0.001**

 Normal

9.0 (22.0)

0.0 (0.0)

17.0 (41.5)

15.0 (36.6)

 Low

36.0 (27.9)

45.0 (34.9)

19.0 (14.7)

29.0 (22.5)

  1. Statistical significance P < 0.05; **: high statistical significance P < 0.01