Qualitative assessment of sediment from River Meghna, Bangladesh

Abstract

The present study was conducted to find the status of different soil quality variables of the Meghna River during the period from September, 2015 to March, 2016. The values of different soil quality parameters such as silt, sand, clay, bulk density, pH, EC and organic matter fluctuated between 13.33-58.33%, 29.25-88.42%, 4.92-17.42%, 1.43-1.71g/cm3, 6.86-8.06, 43-942.67µs/cm and 0.24-3.1% respectively. The heavy metals were analyzed by Atomic Absorption Spectrophotometer (AAS). The observed order of heavy metals mean concentration in sediments Fe> Pb >Cr > Co > Cd in mg/kg, respectively. Significant differences (p<0.05) was found in the values of soil organic matter of the Meghna river in terms of sites. But the value of silt, sand, clay, bulk density, pH and EC exhibited no significant variation with sites. The concentration of silt, sand, clay, bulk density, pH, EC and organic matter showed no significant variation with seasons (p>0.05). Very strong positive correlation between Cr vs EC (0.965), Cd vs EC (0.962), Cd vs Cr (0.959) and bulk density vs % sand (0.951) was observed at the significance level 0.01. Fe vs % sand (0.944), Cd vs Fe (0.824), Pb vs % O.M (0.823) and bulk density vs Fe (0.822) showed very strong positive correlations at 0.05 level of significance. The concentration of the soil parameters indicate that the river is being polluted and the statistical analysis proved that anthropogenic sources are the main contributor.Bangladesh J. Sci. Ind. Res.53(2), 89-98, 2018

Assessment of soil quality in relationship with aluminium phosphide (ALP) and rotenone in selected fish ponds of Rajshahi district in Bangladesh

“…ANOVA shows significant differences in potassium (F = 6.782, P = 0.0046) and iron (F = 5.273, P = 0.0126) in the soil of fish ponds at the level of p<0.01 and p<0.05 respectively (Table 3). The finding is in agreement with the earlier accounts of Bhuyan et al [44] , who revealed that no significant differences are found in soil quality parameters such as EC, pH, OC and OM. This study is also supported by a previous study that there are no significant differences between total N, K, P, S, As and Ni around the Barapukuria coal mining industrial area [45] .…”

“…On the other hand, some parameters were also exhibited significant relationships with rotenone vs control viz, S (p<0.001), K (p<0.001), P (p<0.01) and Ca (p<0.05) (Table 4). More or less similar findings were observed by Bhuyan et al [44] , in Sitalakshya river and by Kumar et al [35] in Madhupur tract, Bangladesh. Kumar et al [35] .…”

Assessment of the Hydraulic Geometry of the Upper Meghna River in Bangladesh

“…Hence, the grain size of the sediments is quite similar to that of the neighbouring floodplain sediments (Datta & Subramanian, 1997; USAID [United States Agency for International Development], 1988). Bhuyan & Islam (2018) assessed different soil quality variables of the Meghna River during the period from September, 2015 to March, 2016, which is presented in Table 1. The concentration of sand, silt, clay, bulk density, pH, and electrical conductivity (EC) showed no significant spatiotemporal variation except soil organic matter, which showed significant spatial variation.…”