Item

Description

1. Name of Project

Simodong Irrigation Sub-Project

2. Location

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

(2)        Project Location and Administration

·          Province         : North Sumatra

·          District           : Asahan

·          Sub-district     : Air Putih and Medang Deras

              100 km southeast of Medan 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 Simodong intake weir and drainage canals

(2)       New construction of irrigation system

5. Irrigation Development Area

(1)       Whole project area                 :    2,651 ha

(2)       Target area under PTSL-II      :    2,651 ha

6. Water Supply and Water Requirement

(1)     Water source: Pare-Pare River, a tributary of the Bah Bolon 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: 2.02 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. 

Simodong Irrigation Sub-project is a part of Bah Bolon Irrigation Project, and the Simodong intake weir was constructed in 1997 by grant aid of Australian Government.  Since then the small structures were constructed by the government budget.  The remaining irrigation and drainage 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 138% to 200%

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

1. Water resources

The irrigation water for Simodong sub-projec is taken from the existing Simodong intake weir in the Pare Pare river,  having a catchment area of 25.16 km^{2 a}at the intake site.  According to the Bah Bolon project plan, the Bah Bolon river water is diverted to the Gambus river and the Tanjung river at the existing Tanjung Muda intake in the Bah Bolon river.  The diverted water to the Tanjung river and its own runoffs are further diverted to the Pare Pare river. 

The average discharge, the maximum, and the minimum (10 days basis) at the intake site are estimated to be 13.4 m³/sec, 24.4 m³/sec and 7.5 m³/sec, respectively. 

The river discharge is sufficient for the whole Simodong Irrigation Sub-project area of 2,561 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 (village irrigation): 1,075 ha

·            Rain-fed paddy field: 1,576 ha

Tertiary system for village irrigation area of 1,075 ha and rainfed area of 1,576 ha is required. 

There is no need of land development because of all paddy fields in the sub-project area. 

Most of the middle and downstream areas are put in the rainfed condition and almost all the sub-project area are confronted with ill-drainage problems.  Some of farmers have planted oil palm in their farms, or changed to fishponds, but the conditions are not so good.

3. Institutional set-up

There is no water users association even in the simple irrigation system area. 

4. Environmental issues

·            Land acquisition and construction work for Simodong sub-project area have been carried out since 1990 as a part of the whole Bah Bolon Project, and no significant problem on land acquisition occurs. 

·            The area in which the works are to be carried out is one that is already used for agriculture. The area is therefore one in which the flora and fauna has adapted to a managed agricultural system. 

·            There is no major negative environmental impact. 

Item

Scope of Work

1.

Main Irrigation Canal System

(1) Rehabilitation of existing weir

1 no.

(2) Construction of main irrigation canal

6.68 km

(3) Construction secondary irrigation canals

      Barohol secondary canal

7.11 km

      Simodong secondary canal-1

2.86 km

      Simodong secondary canal-2

2.26 km

      Simodong secondary canal-3

1.97 km

      Simodong secondary canal-4

3.83 km

      Simodong secondary canal-5

2.50 km

      Simodong secondary canal-6

4.10 km

      Simodong secondary canal-7

3.60 km

      Simodong secondary canal-8

2.45 km

(4) Construction of irrigation canal related structures

      Off-take/diversion structure

46 nos.

      Measuring structure

3 nos.

      Culvert

18 nos.

      Bridge

3 nos.

      Aqueduct

- nos.

      Cross drain

4 nos.

      Drop

1 no.

      Foot bridge

7 nos.

      Washing step

55 nos.

2.

Drainage Canal System

(1) Rehabilitation of main drainage canal

28.60 km

(2) Rehabilitation of secondary drainage canals (12 canals)

31.41 km

(3) Construction of drainage canal related structures

      Bridge

15 nos.

      Culvert

22 nos.

      Drain inlet

6 nos.

      Foot bridge

15 nos.

      Drop structure

6 nos.

      Washing step

2 nos.

3.

On-farm System

(1) Tertiary canal system

2,651 ha

Item

Description

1. Executing Agency

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

2. Implementation Management

Implementation of Simodong Irrigation Sub-project is managed by the sub-project manager of Simodong 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 North Sumatra Irrigation Project 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 the 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.