Item

Description

1. Name of Project

Batang Tongar Irrigation Sub-Project

2. Location

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

(2)        Project Location and Administration

·        Province          : West Sumatra

·        District            : Pasaman

·        Sub-district      : Pasaman

185 km southwest of Padang city.

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)     Rehabilitation of existing main and secondary canals

(2)     New construction of irrigation system

Intake weir: already constructed

5. Irrigation Development Area

(1)     Whole project area                  :    6,644 ha

(2)     Target area under PTSL-II       :    6,644 ha

Some of the main canal and secondary canals for 22.5 km in total length have been constructed, but require the improvement due to slope sliding.  The target area under PTSL-II includes the improvement area (existing irrigation area of 1,207 ha). 

6. Water Supply and Water Requirement

(1)     Water source: Batang Tongar River

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

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

(4)     Design unit water requirement: 1.84 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 intake weir has been constructed and completed in 1994, and canal works have commenced in 1994.  Irrigation water supply is been made for an area of 1,207 ha out of the project area of 6,644 ha.  The remaining irrigation facilities will be constructed under PTSL-II.  Some farmers has changed their land use from the paddy fields to oil palm plantations because they have been waited for irrigation for a long time.

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

·            Increase of cropping intensity from 88% to 200 %

·            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 Batang Tongar river at the existing Batang Tongar intake weir, having a catchment area of 312 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 23.3 m³/sec, 55.5 m³/sec and 5.8 m³/sec, respectively. 

The overall water balance simulation between the Batang Tongar river flows and irrigation water requirements of the whole Batang Tongar Irrigation Project shows that the river discharge is sufficient for the whole area of 6,644 ha with a cropping pattern of paddy-paddy (annual cropping intensity of 200 %). 

2. Land use

The present land use is as shown below.

·            Irrigated paddy field: 1,207 ha

·            Rain-fed paddy field: 3,437 ha

·            Oil palm area: 1,000 ha

·            Bush/grass land/shrub: 1,000 ha

Irrigated paddy fields 1,207 ha are provided with tertiary canals, and no improvement is required. 

Tertiary system for rainfed paddy fields 3,437 ha is needed.

Land development inclusive of tertiary system for oil palm/bush/grass land/shrub areas 2,000 ha is required, which is scattered in sizes of 200 ha to 500 ha.

3. Institutional setting-up

There have been formed 9 water users associations in the existing irrigation area in the upstream of the Batnag Tongar sub-project area.  But the transfer of O&M responsibility to WUAs is not conducted. 

4. Environmental issues

The area of 2,000 ha is identified for land development area, which is currently planted with oil palm/rubber trees, and in upland.  Farmers’ attitudes; reluctance or willingness to change to paddy fields, will need to be addressed through a program of public consultation meetings.

The oil palm plantations are highly managed environments, then  reversion to paddy fields may represent an improvement in habitat type and overall biodiversity.  

A majority of the land acquisition was carried out in the period of 2000/01.  A small amount is remaining. 

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 canal

6.22 km

(2) Rehabilitation of existing secondary canal

14.44 km

(3) Construction of main irrigation canal

- km

(4) Construction secondary irrigation canals

      Rimbo Jandung secondary canal

2.35 km

      Baru secondary canal

4.22 km

     Lingkin secondary canal

8.41 km

      Simpang Empat secondary canal

1.44 km

      Payunan secondary canal

5.58 km

      Jeranggo secondary canal

0.84 km

      Batang Penantian secondary canal

2.61 km

      Cubadak secondary canal

4.80 km

      Cubadak Kiri secondary canal

2.69 km

      Pasaman Baru secondary canal

3.51 km

      Lubuk Lur secondary canal

5.60 km

      Toman secondary canal

8.43 km

      Cubadak Hulu secondary canal

1.52 km

      Katimaha secondary canal

2.21 km

      Lintang Selatan secondary canal

5.89 km

      Biluan secondary canal

1.06 km

      Tapalan secondary canal

1.31 km

      Bandar Rejo secondary canal

1.78 km

(5) Construction of irrigation canal related structures

      Off-take/diversion structure

95 nos.

      Measuring structure

4 nos.

      Culvert

16 nos.

      Foot bridge

52 nos.

      Aqueduct

3 nos.

      Cross drain

19 nos.

      Drop

225 nos.

      Side spillway

2 nos.

      Chute way

7 nos.

2.

Drainage Canal System

(1) Construction of main drainage canal

- km

(2) Construction of secondary drainage canals (- canals)

- km

(3) Construction of drainage canal related structures

      Bridge

 - nos.

      Drain inlet

- nos.

3.

On-farm System

(1) Tertiary canal system

3,437 ha

(2) Land development including tertiary system

2,000 ha

Item

Description

1. Executing Agency

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

2. Implementation Management

Implementation of Batang Tongar Irrigation Sub-project is managed by the sub-project manager of Batang Tongar 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 the West Sumatra Irrigation 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.