Environmental Engineering Reference
In-Depth Information
(p<0.05, Table 1). Significant (p<0.01) positive relationships within dissolved oxygen, water
temperature, total suspended solids, tidal height, inundation period, soil temperature, soil
texture (% sand), soil moisture, bulk density, particle density, exchangeable Ca, total N and
the available P of soil and negative relationships within dissolved oxygen, water salinity,
water transparency, water table depth, soil salinity, soil organic carbon, organic matter, soil
texture (% clay), field water capacity were observed. On the contrary the significant (p<0.05)
negative correlation between dissolved oxygen and porosity was recorded in the present study
(Appendix B).
24.00
21.00
18.00
15.00
12.00
9.00
6.00
3.00
Figure 6. Seasonal variation of water transparency of salt marsh bed of Fauzderhat area of Chittagong
coast.
The total suspended solids (TSS) of sub-surface water in the vicinity of
P. coarctata
bed
were fluctuated between seasons that were ranged from 159.17±29.81 to 1096.25±51.94mg/l
throughout the study period. Minimum TSS value (130mg/l) was recorded during winter
while the maximum value (1145mg/l) was recorded during monsoon (Appendix A). TSS
values were highly increased in monsoon and premonsoon than the values recorded in winter
(Figure 8). Variations in TSS values in different seasons were significant at p<0.05 (Table 1).
Significantly (p<0.05) higher value in monsoon and lower value in winter was recorded.
Total suspended solids showed a positive correlation with water temperature, dissolved
oxygen, tidal height, inundation period, soil temperature, percentage of sand, bulk density,
particle density, exchangeable Ca and Mg of soil and a negative correlation with water
salinity, water transparency, water table depth, soil salinity, soil organic carbon, organic
matter, percentage of clay, moisture, field water capacity of soil at the level of p<0.01.
Similarly total suspended solids positively correlated with total N, available P and negatively
correlated with silt content of soil at 5% level of significance (Appendix B).
