Coverage

Niger Delta Region, Nigeria

Project time

January – February 2009

Objectives/scope

Contribute to the formulation of an integrated and participatory Strategy and Action plan referring to biomass energy in the Niger delta.

Institutional settings

Analysis done for SNAMPROGETTI SpA (a company of SAIPEM) as contribution to Rivers State Government in the Niger delta region of Nigeria .

Scale/resolution

Raster cell resolution = 100 m (1 pixel = 1 hectare)
Administrative = 41 Local Government Areas (LGA)

Demand features

Residential:consumption: Minimum, medium and maximum consumption based on 2007 demographic census data and Landscan 2000 rural/urban proportions (FAO 2005b) and FAOSTAT woodfuel data.
Commercial consumption was tentatively estimated as 10% of urban residential consumption (ref Mozambique).

Supply features

Direct supply sources: Minimum. medium and maximum woody biomass supply potential was mapped on the basis of the 17-classes land cover map available for the study area, of limited inventory data (Beak Consultants 1998) and on FAO FRA 2005 country report and statistics. Accessible resources were estimated and mapped on the basis of road and waterways proximity, populated places and crossing resistance factors associated to land cover classes. The productivity available for energy was estimated after deduction of industrial roundwood.
Indirect supply sources: this source was limited to sawmills residues as 50% of processed roundwood.

Integration features

Supply/demand balance was estimated all supply and demand scenarios, producing 9 balance maps (thus indicating the wide margin of approximation due to the limits of the available data). The local balance was estimated by pixel, in a local context (3 km context) and by LGA.

Woodshed/bio-shed analysis

Woodshed analysis was carried out for Port Harcourt considering the deficit areas (from the local balance analysis) and the commercial fraction of the surplus. The results of woodshed analysis for the various combinations of supply and demand variants are shown in Figure_.

Integration with other aspects

Not implemented

Findings/conclusions

Given the wide uncertainty of reference data, the present a wide range of values. Considering medium supply and demand values, the supply/demand balance is positive, with an estimated surplus of 1.7 Mt. The States of Bayelsa and Rivers present a consistent surplus (1.36 and 0.42 Mt, respectively) while the other States show a slightly negative balance for the areas covered by the analysis.
Considering the medium variants, the woodshed of Port Harcourt covers an area around the city with a radius of approximately 50-60 Km.

Publications

Drigo R. 2009 (unpublished report). WISDOM Niger Delta Region -Analysis of woodfuel supply and demand in the delta of the River Niger in Nigeria applying the Woodfuel Integrated Supply/Demand Overview Mapping (WISDOM) methodology. SNAMPROGETTI S.p.A.