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

K A H A Y A S u l a w e s i S e l a t a n

Bandung, October 4, 2001 Inventory Study on Development Potential For Rural electrification in 1 S I T E R E P O R T

K a h a y a - K i n d a n g

N 1. GENERAL INFORMATION Province : Selatan

MAKALE Regency : Bulukumba District : Kindang Village : Kindang Site / Sub-village : Kahaya PARE River : Balantiyeng PARE WATAMPONE Gross Head : 17.5 m Estimate Design Discharge : 400 l/s KAHAYA Hydraulic Potential Power : 68.67 kW SULAWESI ISLAND Estimate Electrical Power : 34.65 kW

2. SITE DESCRIPTION 2.1. Location which services route among Bulukumba - Kahaya sub-village is one of the potential site Kindang - Kahaya. From Kindang (Kahaya), for a Micro Hydropower (MHP) implementation. the MHP scheme location (power house) Kahaya sub-village is part of Kindang village, could be reached by walk in6 15 minutes (for Kindang district, , Sulawesi more detail, see Table 1.) Selatan province. It is located geographically at S 0500 19'03”and E 120 00'03”. Kindang village north 2.3. Topographic and Geological Condition border is Batu Belerang village (), The MHP scheme will uses water from Borong Rapoa village at the southern side, forest Balantiyeng river. The river located on the and mount Lampo Batang at the western side north of Kahaya sub-village. From the MHP and Tamaona village at the eastern side. scheme

Table 1. Route of Access Line

Route Distance Duration Available Layer (road) Transportation Type

Bulukumba - Kindang31 km 1 hour Bus, rented car Asphalt Kindang district - Kindang village13.5 km 3 hour Bus, rented car Asphalt, Soil Kindang village - MHP scheme location (Kahaya) 450 m 15 minutes - Soil

2.2. Accessibility location (power house) the river goes to the Kahaya sub-village located about 45 km to the southeast direction. Topographic conditions north of Bulukumba, Bulukumba regency, along the river are moderate slope, while Sulawesi Selatan Province. The location could be materials around the river are rock, and reach by four wheel vehicle such Kijang or gravelly. Detail topographic map could be motorcycle in about 4.5 hours from Bulukumba, seen in Annex 3. or by a public transportation (buses, rented cars) 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 Kahaya sub-village are modern agriculture know-how. According to spread, not concentrated. There is an adequate the agricultural potential in the area, Kahaya distance between every small group from one to are quite prospective to develop further. another. Almost the villagers are farmers. Their There are existing public facilities such as main crops are coffee, and tobaccos. They still elementary school, and mosque, no such a cultivate their land in traditional way, without any community organization existed in Kahaya.

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

Sub-Village Village Number of Latitude Line Longitude Line Household

Kahaya Kindang 66 S 0500 20'03” E 120 00'28” Taboakang Kindang 64 S 0500 19'37” E 119 59'58” Balantiyeng Kindang 20 S 0500 19'13” E 120 00'28” Total 150

4. POTENTIAL ENERGY SOURCES AND ELECTRIFICATION CONDITION

The villages around the MHP scheme has not been electrified and will not get electricity from PLN grid, at least in the recent PLN Plan. The nearest PLN electricity grid is about 4.5 km. Existing main energy sources for villagers there are kerosene, oil, and a small photovoltaic (solar cell) power plant for lighting and others. 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, and coffee grinding. 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 which will electrified by MHP scheme at Kahaya sub-village are6150 households. Based on empiric data of electrification project using MHP, the estimate electricity need or electrical power need assumption is about 200 watt per house. Including the electricity need for several public Figure 1 facilities, then total MHP Capacity expected for Landscapes and village settlement at Kahaya sub- Kahaya sub-village is about 31.06 kW. village, Kindang. 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 150 200 W 30 kW - School 1 100 W 0.1 kW Elementary School, Mosque 2 100 W 0.2 kW Public Facility (Street Lighting) - 0.76 kW Total 31.06 kW

5. HYDRO-POWER POTENTIAL

According to topographic measurement, water -haya sub-village and the surrounding area from Balantiyeng river will be flowed through is about 31.06 kW. To fulfil this requirement, intake then to headrace which the length is about the MHP discharge have to be about 400 l/s 353 m (see detailed site plan at Annex 4). For this with the estimate net head 17 m, with this MHP scheme, measured gross head is about 17.5 calculation the MHP scheme could generate m and estimated penstock length is about 80 m. electricity power about 34.65 kW and still Detail penstock profile is shown at Annex 5. have reserved power about 3.59 kW (see Estimated minimum power electricity need in Ka - detail calculation at Table 4.). Actual discharge measured of Balantiyeng River is6 736 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 400 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

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, as shown in Table 2, is about 2.95 km length. Figure 2 The transmission line design of Kahaya sub- Measuring flow (discharge) at Balantiyeng river; Kahaya sub- village and the surrounding area is shown in village, Kindang. 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 17.5 m

Measured Discharge ( when surveyed) Qm 736 l/s

Design Discharge (max 60% from Qm ) Qd 400 l/s

Hydraulic Power Potential Ph 68.67 kW

Estimate Net Head Hnet 17 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 38.5 kW

Estimate transmission Losses Ploss 3.85 kW

Estimate Electrical Power delivered to the village Pel2 34.65 kW

Expected MHP Capacity (refers to table 3) Pexp 31.06 kW

Reserved Power (Pel2 - Pexp ) Pres 3.59 kW I. DEMOGRAPHIC & SOCIAL

Item / Description Amount / Remarks Site / Sub-village Kahaya River Balantiyeng Village Kindang District Kindang Regency Bulukumba Province Sulawesi Selatan Distance to PLN Grid 4.5 km Number of Population 856 Number of Households 150 Means of Livelihood Farming Economic Potential (Local Commodity) Coffee, tobaccos

II. HYDRAULICAL CONDITION

Item / Description Amount / Remarks Gross Head 17.5 m Estimate Design Discharge 400 l/s Hydraulic Potential Power 68.67 kW Estimate Electrical Power 34.65 kW

III. C I V I L

Item / Description Amount / Remarks Estimation of Weir & Intake Type of Weir Gabion Material Stone Masonry Width (of Weir) 8 m Type of Intake Side Intake Material Stone Masonry

Estimation of Headrace (Channel) Type Open Channel Material Stone Masonry Length 353 m

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

Estimation of Penstock Length 80 m Diameter 58 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 2.95 km Photograph 1 The selected location for Intake scheme, Balantiyeng river, Kahaya sub-village.

Photograph 2 The selected location for penstock route, lays over a hilly lands in part of Kahaya sub-village. Photograph 3 Nature of streambed of Balantiyeng river; The selected location for Dam and Intake scheme

Photograph 4 An underbrush area in part of Kahaya sub-village; the selected location for the head tank (Forebay) scheme.