Abstract
This article is based on a study aimed to determine physiochemical parameters, fecal coliform, total coliforms, heterotrophic plate count, arsenic, iron and lead of water to evaluate their effects on human health. Analysis was carried out on tube-well water collected from Nalitabari township of Sherpur District in Bangladesh. The dissolved oxygen (DO), total dissolved solids (TDS), salinity and electrical conductivity were in the ranges of 4.30 to 7.30 ppm, 350 to 792 mg/l, 0.2 to 0.5%, and 715 to 1,970 μS/cm. The pH values were slightly lesser or more than permissible value. Due to the vicinity to the latrines, 17 tube-wells’ water was contaminated by fecal coliforms. The highest heterotrophic plate count was 7.5×103 cfu/ml in ward-8 of the town. Eschericia coli and Vibrio cholerae were identified in ratio of 30.56% and 18.06%, respectively, in the tube-well water, resulting into diarrhea among children. About 6.94% of tube-well water was contaminated with arsenic. 3.25% and 4.5% respondents were suffering from skin diseases and headache, respectively. So, an alternative source of drinking water should be arranged for a better public health of present and next generations.
Highlights
In the urban environment there is a significant transformation of various components of the landscape, which worsens the modes of existence of biotic components of ecosystems and human living conditions
The relationship between yield parameters and landscape-ecological diversity is non-linear, which determines the presence of optimal diversity of natural protected areas for the highest potato yields
The maximum concentration of dissolved oxygen (DO) was 7.30 mg/l in the water collected from TW22, whereas the minimum concentration was found 3.95 mg/l in TW15 belonging to ward-2
Summary
In the urban environment there is a significant transformation of various components of the landscape, which worsens the modes of existence of biotic components of ecosystems and human living conditions. Functional efficiency of forest plantations in urban environment depends on sustainability and diversity of ecosystems formed within them. The growth of population and the expansion of built-up areas caused by urbanization can have a significant impact on the supply and distribution of critical ecosystem services. Soil invertebrates in urban environments are taxonomically and functionally diverse. This is contributed to by the specific features of the soil as a habitat.
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