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Testing, Validation and Upscaling of Water Saving Technology in Rice Production (twst) -2012

Dr. M Towfiqul Islam
PSO and Head
IWMD, BRRI

Dr. Golam Wahed Sarker
PSO
Agril Economics Division, BRRI

Dr Md. Moniruzzaman
PSO
IWMD, BRRI

Abstract/ Executive Summary:

A project work was done at Dhamurhat Upazila of Naogaon and Hossainpur Upazila of Kishoreganj to harvesting and ponding of rainwater for utilization in mitigating drought affected rice; minimizing conveyance loss and increasing water use efficiency in rice production; increase irrigated area coverage by adopting water saving technologies; and avoiding repeated priming in STW. The mainline of PWDS was divided into three portions such as head, middle and tail and farmers/plots under these portions were named head farmers/plots, middle farmers/plots and tail farmers/plots respectively. Times per irrigation at different plots of head, middle and tail portions were measured. Five plots from each portion were taken as sample. Average yield of supplemental irrigated and rainfed Aman rice were 5.52 t/ha and 4.33 t/ha, respectively. About 21.33% yield was increased and average benefit was 11948 Tk/ha due to supplemental irrigation. During Boro season about 99% conveyance loss was reduced in the PVC pipe water distribution system (PWDS). After introducing PWDS irrigated area was increased by 20% (10 Bigha). For using PWDS irrigation cost per Bigha under head, middle and tail could be reduced by 316.8 Tk, 422.4 Tk and 422.4 Tk respectively. Check valve (CV) nonuser wasted 131 hours and CV user wasted only 2.5 hours for starting pump. The most important thing was that the CV user could save 3000.00 (Three thousand) Taka in STW operation per season.

Keywords: STW, AWD, Pipe distribution system, Priming

Location: Dhamurhat Upazila of Naogaon and Hossainpur Upazila of Kishoreganj

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Crop-Soil-Water Management

Non-commodity: Up scalling

Objectives:

Minimizing conveyance loss and increasing water use efficiency in rice production;
Increase irrigated area coverage by adopting water saving technologies; and
Avoiding repeated priming in STW.

Methodology:

The mainline of PWDS was divided into three portions such as head, middle and tail and farmers/plots under these portions were named head farmers/plots, middle farmers/plots and tail farmers/plots respectively. Times per irrigation at different plots of head, middle and tail portions were measured. Five plots from each portion were taken as sample.

Source of Information: Proceedings of BRRI Annual Internal Review for 2012

Article Link (Online Journal):

Funding Source:

1. Krishi Gobeshona Foundation

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Nevertheless irrigation cost per Bigha per season was 528 Tk, 950.4 Tk and 1161.6 Tk under head, middle and tail respectively with PWDS. The table also shows that for using PWDS irrigation cost per Bigha under head, middle and tail could be reduced by 316.8 Tk, 422.4 Tk and 422.2 Tk respectively.

Due to earthen channel irrigation coverage was always lower than potential irrigation area. It was found from a survey that irrigation coverage in last year was 50 Bigha. After introducing PWDS in this year irrigation coverage was 60 Bigha i.e. irrigated area was increased by 20% (10 Bigha).

The most hassle and painstaking and laborious mater for STW operation is priming. The CV nonuser had to prime his pump 3 times (SL1*SL2) per day and 315 times (SL1*SL2*SL4) per season whereas CV user had to prime once per season. Moreover for starting pump CV nonuser wasted 131 hours and CV user wasted only 2.5 hours. The most important thing was that the CV user could save 3000.00 (Three thousand) Taka in STW operation per season.

Knowledge Management: Report/Proceedings