INVENTORY STUDY ON DEVELOPMENT POTENTIAL FOR RURAL ELECTRIFICATION IN ISLAND -

Dona Nusa Tenggara Timur

Kupang, November,2002

DATA BASE by LPM – SDA ‘EDEN’ Dona – Naruwolo

1. GENERAL INFORMATION Province : Nusa Tenggara Timur : Ngada District : Jerebuu Village : Naruwolo Jerebuu Site / Sub-village : Dona Dona River : Waenanu Gross Head : 42 m Estimate Design Discharge: 108 l/s Hydraulic Potential Power : 44.50 kW Estimate Electrical Power : 29.67 kW Catchments area : 4.16 km2

2. SITE DESCRIPTION 2.1. Location 2.3. Topographic and Geological Condition Dona sub-villages is one of the potential site for a Micro Hydropower The MHP scheme will use water from (MHP) implementation. Dona Sub- Waenanu River. The river located on the villages is a part of Naruwolo, Jerebuu South of Dona sub-villages. From the MHP district, Ngada regency, Nusa Tenggara scheme (power house location) the river Timur province. It is located goes to the north direction. Topographic geographically at S 080 54’ 07,69” and conditions along the river are moderate E 1210 01,28’ 32,98”. Dona village slope, while the soil condition in waterway north border is Were 1 village, is loose. And the materials around the river Wogowela the southern side, Dariwali are gravel and loose soil. There is a at the western side and Boba village separate channel (waterway) in the middle eastern side. part of head race, and also a split stream on the intake scheme (it is recommended to make a further measurement here, to adapt this condition).

DATA BASE by LPM – SDA ‘EDEN’ Table 1. Route of Access Line Available Layer (road) Route Distance Duration Transportation Type – Jerebuu 20 km 60 minutes Bus Asphalt Jerebuu - Noge 5 km 15 minutes Bus Asphalt, Grave Noge – Dona 5 km 30 minutes - Soil (MHP scheme location)

2.2. Accessibility

Dona sub-villages located about 30 km to the south east of Bajawa, Ngada regency, Nusa Tenggara Timur province. The location could be reach by four wheel vehicle such Kijang or motorcycle for about 2 hour from Bajawa, or by a public transportation (buses, rented car) which service route among Bajawa and Jerebuu - Naruwolo village. From Naruwolo, Dona the MHP scheme location (power house) could be reached by walk in ± 10 minutes. (see Table 1.)

3. SOCIO – ECONOMIC CONDITION

Village settlements in Naruwolo According to the agriculture potential in village are spread not concentrated. the area, Dona sub-village is quite There is an adequate distance prospective to develop further. There are between every small group from one existing public facilities such as to another. Almost the villagers are elementary school, church, public health farmers. Their main crops are coffee, center, and village government office. chocolate, and passion fruit. They There are also community organization still cultivate their land in traditional such as LKMD, Farmer groups, and way, without any modern agriculture religious groups. know-how.

DATA BASE by LPM – SDA ‘EDEN’ 4. POTENTIAL ENERGY SOURCES AND ELECTRIFICATION CONDITION The villages around MHP scheme has MHP development is expected giving not been electrified and will not get valuable support to increase electricity from PLN grid, at least in the community economics quality apart recent PLN plan. The nearest PLN from lighting need. electricity grid is about 21 km. Existing The numbers of household that main energy sources for villagers there will electrify by MHP scheme at are kerosene, and oil for lighting. Naruwolo village are ±172 The village around MHP scheme household. Based on empiric data of economically has many potential, electrification project using MHP, the especially in agriculture, horticulture, estimate electricity need or electrical and forestry sectors. However, related power need assumption is about 125 production facilities are still insufficient, watt per house. Including the there are some possibilities such as; electricity need to several public vanilla, cocoa, clove, and coffee facilities, than total MHP Capacity grinding. expected for Naruwolo villages is about 22,95 kW.

Elementary School in Dona

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

Number of Sub-Village Village Latitude Line Longitude Line Household Dona Naruwolo 120 Bhata Naruwolo 52

Total 172

DATA BASE by LPM – SDA ‘EDEN’ Table 3. Estimate Energy Demand in the Catchment Area

Capacity per Item Amount Capacity Remark Unit Households 172 125 W 21,5 kW - School 1 100 W 0,1 kW Elementary School Church 1 150 W 0,15 kW Public Health Center 1 100 W 0,1 kW Village Office 1 100 W 0,1 kW Meeting Facility Public Facility (Streed 1,00 kW Lighting) Total 22,95 kW

5. HYDRO – POWER POTENTIAL According to topographic Waenanu River is ± 180 liter/second. measurement ,water from Waenanu Recorded discharge data or annual river will be flow through intake than to discharge are not available and headrace which the length is about 400 discharge measurement done not in m . For this MHP scheme, measured the driest month,therefore maximum gross head is about 42 m and estimate discharge in the dry season estimate penstock length is abouth 98 m. Detail about 108 l/s. penstock profile is shown. However, design discharge has to be Estimate minimum power electricity determined in detail and more need in Naruwolo village and it is accurate, considering all factor, and surrounding is about 22.95 kW. To catchment area when a further fulfill this requirement, the future MHP feasibility study for this MHP done. discharge have to be about 108 l/s with the estimate net head 40 m, with 6. TRANSMISSION LINE this calculation the MHP scheme could generate electricity power about 28.18 The village settlement surrounding kW and still have reserved power the MHP scheme is spread and in about 5.23 kW (see detail calculation small group which have significant at Table 4.). distance from each other. Main transmission line to house sub- villages, as shown in Table 2, is about 5 km length.

DATA BASE by LPM – SDA ‘EDEN’ Table 4. Estimate Power Capacity of The MHP Scheme

Item Symbol Amount Estimate Gross Head Hg 42 m Measured Discharge (when survey) Qm 180.00 l/s Design Discharge (max 60 % frm Qm) Qd 108.00 l/s Hydrolic Power Potential Ph 44.50 kW Estmate Net Head Hnet 40 m Estimate Turbine Efficiency ηT 0.7 Estimate Generator Efficiency ηG 0.85 Estimate mechanical transmission line efficiency ηM 0.97 Estimate Electrical Power Generated at the power house P el1 29.67 kW Estimate transmission Losses Ploss 1.48 kW Estmate Electrical Power delivered to the village P el2 28.18 kW Expected MHP Capacity (refers table 3) P exp 22.95 kW Reserved Power (Pel2 - Pel1) P res 5.23 kW

DATA BASE by LPM – SDA ‘EDEN’