I N V E N T O R Y S T U D Y O N D E V E L O P M E N T P O T E N T I A L F O R R U R A L E L E C T R I F I C A T I O N I N I N D O N E S I A

BAMBALU S u l a w e s i S e l a t a n

Bandung, September 17, 2001 Inventory Study on Development Potential For Rural electrification in 1 S I T E R E P O R T

Bambalu - Batang

N 1. GENERAL INFORMATION Province : Selatan BAMBALU : District : TaluWanua MAKALE Village : Batang Site / Sub-village : Bambalu PARE River : Bambalu PARE WATAMPONE Gross Head : 14.2 m Estimate Design Discharge : 500 l/s Hydraulic Potential Power : 69.65 kW SULAWESI ISLAND Estimate Electrical Power : 34.4 kW

2. SITE DESCRIPTION 2.1. Location about 1 hour from , or by a public Bambalu sub-village is one of the potential site transportation (buses, rented cars) which for a Micro Hydropower (MHP) implementation. services route among Palopo - Talu Wanua - Bambalu sub-village is part of Batang village, Talu Batang. (see Table 1.) Wanua district, , Sulawesi Selatan province. It is located geographically at 2.3. Topographic and Geological Condition S0200 57'18.6” and E 120 05'50.7”. Batang village The MHP scheme will uses water from north border is Walenpang district, Wara district Bambalu river. The river located on the south at the southern side, at the of Bambalu sub-village. From the MHP western side and Wara district at the eastern side. scheme location (power house) the river goes

Table 1. Route of Access Line

Route Distance Duration Available Layer (road) Transportation Type

Palopo - Talu Wanua5 km 15 minutes Bus, rented car Asphalt Talu Wanua - Battang9 km 20 minutes Bus, rented car Asphalt Battang - MHP scheme location (Bambalu)10 km 20 minutes Bus, rented car Asphalt

2.2. Accessibility to the north-east direction. Topographic Bambalu sub-village located about 24 km to conditions along the river are moderate slope the north of Palopo, Luwu regency, Sulawesi while the soil condition in waterway is Selatan Province. The location could be reach by gravelly . Detail topographic map is shown in four wheel vehicle such Kijang or motorcycle in Annex 3. Inventory Study on Development Potential For Rural electrification in INDONESIA 2 S I T E R E P O R T

3. SOCIO - ECONOMIC CONDITION Village settlement in Bambalu sub-village are the agricultural potential in the area, Bambalu spread, not concentrated. There is an adequate sub-village are quite prospective to develop distance between every small group from one to further. another. Almost the villagers are farmers. Their There are existing public facilities such as main crops are coffee, chocolate, and clove. They elementary school, and mosque. There are still cultivate their land in traditional way, without also community organizations such Farmer any modern agriculture know-how. According to groups, and religious groups.

Table 2. Sub-Villages which will electrified by The MHP Scheme

Sub-Village Village Number of Latitude Line Longitude Line Household

Bambalu Battang 72 S 0200 57'18.5” E 120 05'50.6” Total 72

4. POTENTIAL ENERGY SOURCES AND ELECTRIFICATION CONDITION

The villages around the MHP scheme has not been electrified by PLN grid, and will not get electricity from PLN grid, at least in the recent PLN Plan. The nearest PLN electricity grid is about 13 km. Existing main energy sources for villagers there are kerosene, diesel fuel, and oil, for lighting. The village around MHP scheme location economically have many potential, especially in agriculture, and horticulture sectors. However, related production facilities are still insufficient, there are some possibilities such as: storage facility, coffee grinding, and others. MHP development is expected giving valuable support to increase community economics quality apart from lighting need. As shown at Table 2, the number of households that will electrified by MHP scheme at Bambalu sub-village are6 72 households. Based on empiric data of electrification project using MHP, the estimate electricity need or electrical power need assumption is about 100 watt per house. Including the electricity need for several public Figure 1 facilities, then total MHP Capacity expected for Generator plant (diesel - fueled); existed by the street of Bambalu sub-village is about 7.59 kW. Bambalu sub village. Inventory Study on Development Potential For Rural electrification in INDONESIA 3 S I T E R E P O R T

Table 3. Estimate Energy Demand in The Catchment Area

Item Amount Capacity per Unit Capacity Remark

Households 72 100 W 7.2 kW - School 1 100 W 0.1 kW Elementary School, Mosque 1 100 W 0.1 kW Public Facility (Street Lighting) - 0.19 kW Total 7.59 kW

5. HYDRO-POWER POTENTIAL

According to topographic measurement, the MHP Bambalu sub-village and it's surrounding is scheme at Bambalu will not uses a headrace about 7.59 kW. To fulfil this requirement, the facility (see detailed site plan at Annex 4). For this discharge scheme should be 500 l/s with the MHP scheme, measured gross head is about 14.2 estimate net head 13.5 m, with this calculati- m and estimated penstock length is about 51 m. on the MHP scheme could generate electricity Detail penstock profile is shown at Annex 5. power about 34.4 kW and still have reserved Estimated minimum power electricity need in power about 26.81 kW (see detail calculation at Table 4.).

Actual discharge measured of Bambalu river is6 600 liter/second. Recorded discharge data or annual discharge are not available and discharge measurement done not in the driest month, therefore maximum discharge in the dry season estimated about 500 l/s.

However, design discharge has to be determined in detail and more accurate, considering all factor, and catchment area when a further feasibility study for this MHP done.

6. TRANSMISSION LINE

The village settlement surrounding the MHP scheme is spread and in small groups which have significant distance from each other. Main transmission line to those sub-villages, Figure 2 as shown in Table 2, is about 1.1 km length. Nature of Streambed at Bambalu river; This will harnessed as The transmission line design of Bambalu the input (inflow) for MHP scheme village is shown in Annex 6. Inventory Study on Development Potential For Rural electrification in INDONESIA 4 S I T E R E P O R T

Table 4. Estimate Power Capacity of The MHP Scheme

I t e m Symbol Amount

Estimate Gross Head Hg 14.2 m

Measured Discharge ( when surveyed) Qm 600 l/s

Design Discharge (max 60% from Qm ) Qd 500 l/s

Hydraulic Power Potential Ph 69.65 kW

Estimate Net Head Hnet 13.5 m h Estimate TurbineEfficiency T 0.7 h Estimate Generator Efficiency G 0.85 h Estimate mechanical transmission efficiency M 0.97

Estimate Electrical Power Generated at the power house Pel1 38.22 kW

Estimate transmission Losses Ploss 3.82 kW

Estimate Electrical Power delivered to the village Pel2 34.4 kW

Expected MHP Capacity (refers to table 3) Pexp 7.59 kW

Reserved Power (Pel2 - Pexp ) Pres 26.81 kW I. DEMOGRAPHIC & SOCIAL

Item / Description Amount / Remarks Site / Sub-village Bambalu River Bambalu Village Battang District Talu Wanua Regency Luwu Province Sulawesi Selatan Distance to PLN Grid 13 km Number of Population - Number of Households 72 Means of Livelihood Farming, Trading Economic Potential (Local Commodity) Coffee, Chocolate, Clove

II. HYDRAULICAL CONDITION

Item / Description Amount / Remarks Gross Head 14.2 m Estimate Design Discharge 500 l/s Hydraulic Potential Power 69.65 kW Estimate Electrical Power 34.4 kW

III. C I V I L

Item / Description Amount / Remarks Estimation of Weir & Intake Type of Weir Permanent / Semi Permanent Material Stone Masonry Width (of Weir) 16.5 m Type of Intake Side Intake Material Stone Masonry

Estimation of Headrace (Channel) Type - Material - Length -

Estimation of Head Tank (Forebay) Material Concrete, Stone Masonry

Estimation of Penstock Length 51 m Diameter 57 cm Material Welded (Rolled) Steel

Estimation of Power House Material Brick Masonry IV. ELECTRO-MECHANICAL

Item / Description Amount / Remarks Estimation of Turbine Type Crossflow Estimate Turbine Efficiency 0.7

Estimation of Mechanical Transmission Type Flat Belt Estimate Mechanical Transmission Efficiency 0.97

Estimation of Generator Type Synchronous Estimate Generator Efficiency 0.85

Estimation of Control System Type Electronic Load Controller Ballast Load Air Heater

V. TRANSMISSION LINE

Item / Description Amount / Remarks Estimation of Transmission Line Length 1.1 km Photograph 1 Nature of stream bed at Bambalu river; lays in the bottom of a hilly lands (by the forest area).

Photograph 2 The selected location for Dam and Intake scheme; Bambalu river, Battang village Photograph 3 The selected location for Power House; by the underbrush area in part of Bambalu sub-village.

Photograph 4 Measuring flow (discharge) at Bambalu river; recorded for6 600 l/s during the survey period.