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Sustainability of Ground Water Use for Irrigation in Northwest Bangladesh

Roknuzzaman
Pulses Research Center, Bangladesh Agricultural Research Institute, Ishurdi, Pabna, Bangladesh

Shahin Iqbal
Pulses Research Center, Bangladesh Agricultural Research Institute, Ishurdi, Pabna, Bangladesh

M.O. Ali
Pulses Research Center, Bangladesh Agricultural Research Institute, Ishurdi, Pabna, Bangladesh

Abstract/ Executive Summary:

The long-term (1997–2018) maximum WT (water table) depth data under different upazilas of Pabna, Natore and Rajshahi district at north west part in Bangladesh are analyzed using MAKESENSE model software to find out WT depth trend and prediction value of WT at different years that helps to take policy sustainable agriculture and judicial use of GW (ground water). It is clear that the rate of change of maximum water table depth varies 0.037 (myear^-1) to 0.39 (myear^-1) in the study areas. Minimum changes rate of WT at Ishurdi about 0.037 myear^-1 (GT7639020) and maximum 0.39 myear^-1 (GT8194048) at Tanore. The changes rate of Chatmohor and Tanore upazilla are higher compare to other upazillas. WT depth showed a declining trend, and falls below the lifting capacity (up to 8 m) of suction-mode pumps. If the present trend in the dry season is continued, suction-mode pumps may not operate at all due to the exceeding the suction limit. Minor irrigated crops could be adopted instead of the monopoly of the rice cropping pattern and adopted climate smart technology of agriculture.

Keywords: Sustainability, Ground Water, Irrigation

Location: Pabna, Natore and Rajsahi District.

Start Date: 00-00-1997

End Date: 00-00-2018

Program Area: Crop-Soil-Water Management

Non-commodity: Adoption of technology

Objectives:

To find out WT depth trend and prediction value of WT at different years that helps to take policy sustainable agriculture and judicial use of GW

Methodology:

The selected areas of northwest Bangladesh are Pabna, Natore and Rajsahi District. The long-term (22 years) WT depth data, from 1997 to 2018, were collected from the Bangladesh Water Development Board (BWDB). In the area, 27 observation wells have been in use for groundwater level monitoring. Data were analyzed using MAKESENSE model software.

Source of Information: Annual Research Report: 2018-2019, Pulses Research Center, RARS, Bangladesh Agricultural Research Institute, Ishurdi, Pabna,

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The fluctuations curve exhibit that the WT depth vary spatially. The WT depth showed a declining trend, and falls below the lifting capacity (up to 8 m) of suction-mode pumps. If the present trend in the dry season is continued, suction-mode pumps may not operate at all due to the exceeding the suction limit. Minor irrigated crops could be adopted instead of the monopoly of the rice cropping pattern. On-farm management of water, such as growing short-duration drought-tolerant or low water demand crops, applying water saving techniques (such as alternate wetting and drying), soil-water conservation through mulching, rainwater harvesting in farm ponds or surface water bodies, etc., should be adopted to avoid groundwater mining and to promote the sustainable use of groundwater resources. These strategies are expected to lead to the sustainable use of groundwater resources in the area.

Knowledge Management: Report/Proceedings