Item

Description

1. Name of Project

Muko Muko Kanan Irrigation Sub-Project

2. Location

(1)     General Layout is shown in Figure A-1.

(2)     Project Location and Administration

·            Province         : Bengkulu

·            District           : Bengkulu Utara

·            Sub-districts   : Muko Muko Utara and Pwk. Lubuk Pinang

              350 km northwest of Bengkulu town

3. Objective

(1)   To enhance rice production through water resources development

(2)   To increase the income of inhabitants in and around the project area

(3)   To raise the farmers living standard

(4)   To increase employment opportunity in the area

(5)   To contribute to the development of the rural socio-economic conditions

4. Type of Development

(1)       Improvement of existing main irrigation canal

(2)       New construction of irrigation and drainage systems

        (Intake weir and part of main canal 2.252 km: already constructed)

5. Irrigation Development Area

(1)     Whole project area                   :    4,919 ha

(2)     Target area under PTSL-II        :    3,957 ha

The peat soil area lying in the downstream area 962 ha is not implemented at the present time. 

6. Water Supply and Water Requirement

(1)     Water source: Manjuto River

(2)     Available supply of water: as shown in Table A-1

(3)     Irrigation water requirement: as shown in Table A-2

(4)     Design unit water requirement: 1.63 l/sec/ha

Item

Description

1. Necessity of the project

Entering the 1990s the self-sufficiency of rice in Indonesia is facing a crisis.  Rice production is quite abnormal and irregular compared with the 1980s.  The average unit yield of rice stands stationary in the 1990s.  The expansion of irrigation area lost momentum in the 1990s, and the rice import resumed from 1994.  Under such situation, the Government has adopted a policy of food security and sustenance of self-sufficiency in rice production.

The crop intensity of paddy fields in Indonesia is as low as 119% that indicates a possibility to expand the harvested area and thereby to increase the rice production through the irrigation development.  In 1999, there was about 2.1 million ha of rain-fed paddy fields and 1.17 million ha of upland paddy fields in Indonesia, for which the irrigated agriculture can be efficiently introduced without major problems such as transmigration, large-scale land development, social infrastructures, etc.

In order to promote the food security and sustenance of self-sufficiency in rice production, the government is keen to implement the irrigation development being effective for rice production, quick yielding and cost effective

The primary objective of PTSL-II is to enhance rice production through water resources development such as irrigation projects or pond/dam projects, contributing to the self-sufficiency of rice in Indonesia.

2. Beneficiary Area

The socio-economic condition of the people in the project area is at the subsistence level due to the limited income from agricultural activities.  The basic development constraint is the lack of irrigation water. 

The Muko Muko Kanan sub-project is a part of Muko Muko Irrigation Project, consisting of Muko Muko Kanan and Muko Muko Kiri schemes.  The intake weir  was constructed in 1989, and irrigation facilitates for Muko Muko Kiri scheme were also completed.  Irrigation supply for Muko Muko Kiri scheme was made for an area of 6,203 ha.  The main canal in its two reaches of Muko Muko Kanan was constructed in 1999 and 2000, but not used. The remaining irrigation facilities will be constructed under PTSL-II.  

With the project implementation, the principal benefit of the project is as follows:

·            Increase of cropping intensity from 154% to 250%

·            Increase of unit yield of crop by changing from rain-fed agricultural land to irrigated land

1. Water resources

The irrigation water is taken from the Manjuto river at the existing Manjuto intake weir, having a catchment area of 440 km² at the intake weir site. 

The average discharge, the maximum, and the minimum (10 days basis) at the intake weir site are estimated to be 30.0 m³/sec, 66.7 m³/sec and 9.1 m³/sec, respectively. 

The Muko Muko Kanan iirrigation sub-project is a part of Muko Muko Irrigation Project, which consists of Muko Muko Kanan scheme and Muko Muko Kiri scheme.  The Muko Muko Kiri Scheme has been constructed and serving for an irrigation area of 6,203 ha from the Manjuto intake weir.  

The overall water balance simulation between the Manjuto river flows and irriagtion water requirements of Muko Muko Irrigation Project shows that the river discharge is sufficient for the Muko Muko Kiri Scheme of 6,203 ha and the Muko Muko Kanan Sub-project area of 4,919 ha with a cropping pattern of paddy-paddy-palawija (annual cropping intensity of 250 %). 

2. Land use

The present land use is as shown below.

·            Rain-fed paddy field                :  1,475 ha

·            Upland                                       :  1,970 ha

·            Bush/Forest                              :     512 ha

Tertiary system for rainfed paddy fields 1,475 ha is required.

Land development inclusive of tertiary system for upland 1,970 ha and bush/forest areas 512 ha is needed. 

The development area of Muko Muko Kanan sub-project in its original design is 4,919 ha, which includes the downstream peat soil area of 962 ha.  The drainage canals have been constructed in the peat soil area, which stands in the process of settlement.    Therefore, the irrigation development of such area is postponed and the area is excluded from the scope of Muko Muko Kana sub-project work under PTSL-II. 

3. Institutional setting-up

There is no water users association in Muko Muko Kanan sub-project area because most of the sub-project area is in the rainfed condition.

The water management including O&M of Manjuto intake weir need to be carried out as the whole Muko Muko project area, therefore sufficient coordination is required between the existing Kuko Muko Kiri area and Muko Muko Kanan area. 

4. Environmental issues

All necessary land acquisition for the construction work has been carried out under the previous stage of Muko Muko Kanan sub-project.  Therefore, no mitigation measure for land compensation is required. 

Present land use consists predominantly of rainfed area and horticulture areas with small areas of bush and forest.  Areas to be implemented is already mostly managed agricultural land.  The works will therefore not result in significant change in the natural environment. 

There is no major environmental negative impact in the sub-project area. 

Item

Scope of Work

1.

Main Irrigation Canal System

(1) Rehabilitation of existing main irrigation canal

2.55 km

(2) Construction of main irrigation canal

19.80 km

(3) Construction of secondary irrigation canals

      Silaut secondary canal

 2.50 km

      Serik secondary canal

4.46 km

      Sumber secondary canal

2.08 km

      Tanjung Alai secondary canal

2.94 km

      Dusun Baru secondary canal

0.96 km

      Curup secondary canal

0.53 km

      Sub-secondary canals (6 canals)

6.90 km

(4) Construction of irrigation canal related structures

      Off-take/division structure

39 nos.

      Measuring structure

2 nos.

      Road Culvert

2 nos.

      Bridge

- nos.

      Aqueduct

2 nos.

      Cross drain

42 nos.

      Drop

2 nos.

      Side spillway

- nos.

      Over chute

2 nos.

      Foot bridge

20 nos.

2.

Drainage Canal System

(1) Rehabilitation of main drainage canal

- km

(2) Construction of main drainage canal

15.26 km

(3) Construction of drainage canal related structures

      Gabion Drop

2 nos.

      Culvert

- nos.

      Drain inlet

- nos.

3.

On-farm System

(1) Tertiary canal system

1,475 ha

(2) Land development including tertiary system

2,482 ha

Item

Description

1. Executing Agency

Directorate General of Water Resources, Ministry of Settlement and Regional Infrastructure

2. Implementation Management

Implementation of Muko Muko Kanan Irrigation Sub-project is managed by the sub-project manager of Muko Muko Kanan Irrigation Sub-project.

3. Monitoring and Management

·           At the sub-project level, the sub-project manager will monitor and control physical and financial progress of the project work under the guidance of Bengkulu Irrigation and Swamp Project Manager and the Chief of Provincial Water Resources Services.

·           At the central level, Directorate of Water Resources in Western Region (DWRW) is responsible for monitoring the progress of the project.  DWRW will report the progress to Directorate of Technical Guidance (DTG).

·           DTG will compile the information together with other sub-projects information to prepare the progress report to JBIC. 

The organization and management structure of project implementation is as per attached in Figure G-1. 

4. Payment Procedure and Monitoring of Financial Progress

·           Direct payment is applied to the civil work contractors. 

·           Any payment will be processed with the confirmation of the contents of invoices by the PTSL-II consultant.

The flow chart of payment and monitoring procedure for financial progress is as per attached in Figure G-2.