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Monitoring of Groundwater Fluctuation and Safe Utilization in Different Geo-hydrological Regions-2014

Dr M A Rashid
CSO and Head
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Dr M Maniruzzaman
PSO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Dr M Mahbubul Alam
SSO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Md Hannan Ali
SO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Md Belal Hosain
SO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Dr M Towfiqul Islam
PSO and Head
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Dr Shahana Parveen
SSO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

The study was conducted to determine the fluctuation of groundwater level over time and to determine water quality at BRRI farm Gazipur, Comilla, Rajshahi, Habiganj, Kustia, Bhanga, Rangpur, Satkhira. Sonagazi and Barisal.Available water level recorder was used for measuring groundwater fluctuation. Water samples were collected from all BRRI R/S and H/Q for quality analysis. During the reporting period maximum lowering of groundwater table was observed in March/April and minimum in September/October. Among the BRRI R/S the highest depth (11.5 m) was observed in Comilla and lowest (0.82 m) in Satkhira area. The above information indicated that out of 9 BRRI R/S, 5 (Bhanga, Rangpur, Satkhira, Sonagazi and Barisal) were suitable for operating shallow tubewell (STW) and the rest 4 (Comilla, Rajshahi, Habiganj and Kustia) were not suitable for using STW during the critical period (March/April) of Boro season. But during wet season all of the 9 sites were suitable for STW use as the water table depth was within the suction limit (8 m). The results showed that both maximum and minimum groundwater level at BRRI farm Gazipur was declining day by day and it was not fully recharged after the monsoon. In 1998 the maximum groundwater level was about 11.68 m from the ground surface which was 33.61 m in 2014. So the lowering was about 22 m in 16 years. The quality analysis of water, collected from different sub-stations of BRRI showed that the water Satkhira had slight salinity problem and all other samples had no salinity problem. Out of 10 samples only 3 samples (Bhanga, Barisal and Satkhira) had slight boron toxicity problem and the other 7 samples had no boron problem. Among the 10 study locations the water of Gazipur, Rangpur , Rajshahi and Kustia were free from sodium toxicity and other six locations had slight sodium toxicity. The pH value of all samples were within the normal range. Therefore, overall the water quality was found suitable for irrigation purpose in all locations.

Keywords: Groundwater level, Aquifer, Salinity

Location: BRRI farm Gazipur, Comilla, Rajshahi, Habiganj, Kustia, Bhanga, Rangpur, Satkhira. Sonagazi and Barisal

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Groundwater

Objectives:

To determine the fluctuation of groundwater level over time
To determine water quality

Methodology:

Available water level recorder was used for measuring groundwater fluctuation. Water samples were collected from all BRRI R/S and H/Q for quality analysis.

Source of Information: Proceedings of the BRRI Annual Review for 2014, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Maximum and minimum groundwater level at BRRI farm Gazipur was declining day by day and it was not fully recharged after the monsoon. In 1998 the maximum groundwater level was about 11.68 m from the ground surface which was 33.61 m in 2014. So the loweringa ws about 22 m in 16 years. During the initial five years the lowering rate was not so high and it was only 3 m (14-11m). But during the last five years (2009- 2014 ) the lowering was about 10 m (2 m /year) which is more than 3 times of the initial declination rate.The quality analysis of water, collected from different sub-stations of BRRI showed that the water Satkhira had slight salinity problem and all other samples had no salinity problem. Out of 10 samples only 3 samples (Bhanga, Barisal and Satkhira) had slight boron toxicity problem and the other 7 samples had no boron problem. Among the 10 study locations the water of Gazipur, Rangpur , Rajshahi and Kustia were free from sodium toxicity and other six locations had slight sodium toxicity. The pH value of all samples were within the normal range. Therefore, overall the water quality was found suitable for irrigation purpose in all locations.

Knowledge Management: Report/Proceedings