Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Groundwater Quality and Human Health Risk Assessment for Safe and Sustainable Water Supply of Dhaka City Dwellers in Bangladesh

Md. Bodrud-Doza
Department of Environmental Sciences, Jahangirnagar University, Dhaka, 1342, Bangladesh

S.M. Didar-UlIslam
School of Environment, Tsinghua University, Beijing, 100084, China

Tanjena Rumed
School of Space and Environment, Beihang University, Beijing, 100191, China

Shamshad B. Quraishi
Chemistry Division, Atomic Energy Center, Dhaka, 1000, Bangladesh

M. Safiur Rahmane
Chemistry Division, Atomic Energy Center, Dhaka, 1000, Bangladesh

Mohammad Amir Hossain Bhuiyana
Department of Environmental Sciences, Jahangirnagar University, Dhaka, 1342, Bangladesh

Abstract/ Executive Summary:

Accessing safe drinking water is an essential and primary human needs. This study was conducted to investigate the suitability of groundwater use in Dhaka City dwellers, factors affecting groundwater quality, and human health risk to initiate the control measures. In this regard, groundwater samples were collected and analysed for pH, EC, TDS, Fe, Mn, Zn, F?, and NO3?. The results revealed that, groundwater is slightly acidic to alkaline and in some samples, Fe and Mn concentrations exceed the standard permissible limits. Principal component analysis (PCA) and cluster analysis (CA) were performed to identify the pollution source and controlling factors, which revealed quality of the groundwater mainly controlled by geological, and several anthropogenic actions. However, chronic health risk of metals and anions exposure via oral and dermal routes were further determined by calculating the hazard quotient (HQ) and hazard index (HI), for both adult and children. Results suggest that, children of the study area are under health risk due to consumption of groundwater for long times, without further treatment. However, from the interpolated maps of HI, south-western part of the study area is identified as the vulnerable zone for public health issues. It is expected that, outcomes of this study will provide useful insights for safe water supply for the city dwellers, and sustainable management of groundwater resources to reduce human hazards.

Keywords: Contamination, Controlling factors, Distribution, Future management, Reduce the health hazards

Location: Dhaka City, Bangladesh

Start Date:

End Date:

Program Area: Risk Management in Agriculture

Commodity: Groundwater, Health hazard, Water pollution

Objectives:

To identify the possible source of contamination, controlling factors and distribution of contamination for future management and to reduce the health hazards.

Methodology:

The study focused on the Dhaka City area located in the central part of Bangladesh lies between 23°40′ and 23°54′ N latitude and 90°20′ and 90°28′ E longitude. The city covering an area of 370 km2 and is bounded by the inter-connecting streams i.e., Tongi Canal to the north, the Buriganga River to the south, the Turag River to the west and the Balu River to the east. The topography of Dhaka City is relatively flat, and its elevation varies between 0.5 and 12 m (Hoque et al., 2007). A total of 23 groundwater samples were collected from the pre-selected sampling points of Dhaka City area, since April 2016. The depths of the wells were varied from 57.91 to 320.04 m. These 23 representative sampling sites were selected by the fishnet method, combination with zonal and block statistics to identify the locations of similar sampling areas (Cali'ski and Kageyama, 2000; Raghavarao and Padgett, 2005) Geographical location of the selected wells was determined. The summary of the measured parameters of groundwater samples and comparison with others studies and standard permissible limits are presented. According to the results, pH of the groundwater is slightly acidic to alkaline in nature, ranging from 6.66 to 8.19 with a mean value of 7.32. Generally, pH indicates the strength of the water to react with the acidic or alkaline material presents in water.

Source of Information: Groundwater for Sustainable Development, Volume 10, April 2020, 100374

Article Link (Online Journal): https://doi.org/10.1016/j.gsd.2020.100374

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The groundwater of the Dhaka City, the capital of Bangladesh was investigated to analyze the health risk due to oral and dermal exposure. Results evident the slight quality deterioration of groundwater, including acidic to alkaline pH, and high Fe and Mn concentration exceeding standard permissible limits. From PCA and CA it was found that, different anthropogenic activities along with rock-water interaction and ion-exchange play a significant role on groundwater quality.

Knowledge Management: Journal