PRE-FEASIBILITY STUDY OF BHUTENI IRRIGATION PROJECT
Date
2023-05
Journal Title
Journal ISSN
Volume Title
Publisher
IOE Pulchowk Campus
Abstract
An irrigation system is used to artificially supply water to agricultural land to support plant
growth and crop production. Bhuteni irrigation project, a medium sized irrigation project, is
selected for the prefeasibility study. There is abundance of land for crop production but due
to ineffective irrigation system only a single crop at some area is cultivated. This project aims
to explore possibility to increase the command area with three types of crops throughout the
year.
Metrological database for the present study was obtained from Department of Hydrology and
Meteorology for analyzing flood and monthly flows. Discharge measured was used to
calculate the monthly flows using MIP method and these data were used to calculate
irrigation water requirement. The structures were designed to meet the requirement.
Bhuteni irrigation project is a medium sized irrigation project located at Goldhap of Jhapa
District. Its catchment area at the diversion point is 25.8 km2. The maximum discharge of
river is 6.7 m
3
/s in August. As per requirement for command area of 750 ha, the maximum
required canal discharge is 1.91 m3
/s. The project will have a weir with gated system to pond
the level of 1.4m for irrigation. The frontal type of intake is designed to supply water to the
canal. For small discharge, triangular canal with round bottom is designed. Settling basin is
designed to remove the silt from canal. Sarda fall type drop is designed where there is abrupt
change in bed level throughout the canal as per requirement. Cross regulator and head
regulator are designed to regulate flow at diversion points. Culvert is designed where a
pathway intersects with the canal alignment. The headwork structure can pass flood discharge
of 131 m3
/s for 100 years return period safely. About 10% of water will be discharged on
downstream through under sluice for water right safety. Every attempt has been made to
consider almost all the parts and get most reliable data. Due to time constraint Environmental
Impact Assessment has not been done. The total estimated cost of the project is 163.21
million Nepalese Rupees and the net revenue generate from the irrigation system is 72.43
million Nepalese Rupees per year. The annual revenue generated in 20 year time period gives
total revenue. The B/C ratio obtained is 2.84. Thus project is feasible.
Description
Bhuteni Khola Irrigation Project, a Medium Irrigation Project is located at Goldhap VDC in
Jhapa District. The source of water is Bhuteni Khola which is a perennial river. The headwork
of this project is 1km south of Sainik Bazar. This irrigation project irrigates about 725 ha of
land of Goldhap.
Keywords
BHUTENI IRRIGATION PROJECT