Gis in Project Impact Assessment Southern Tsetse Eradication Project Humbo Woreda (Snnpr)

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Addis Ababa Universty


The objective of this study is to further expand the use of Remote Sensing and GIS techniques in the country, especially in the area of project planning, monitoring, evaluation and impact assessment in the agriculture sector. Impact assessment of the Southern Tsetse Eradication Project (STEP) was carried out using Remote Sensing and GIS techniques, by taking Humbo Woreda (SNNPR) as a case study. Landsat ETM+ image of the area was used and agricultural sample survey was conducted in 11 peasant associations in the study area. Pertinent questions categorized into household characteristics, agricultural data, tsetse fly and trypanosomiasis condition as well as environmental related issues regarding pre and post project periods were included in a structured questionnaire. Statistical comparison of with and without project situation of various parameters was made. These include size of cultivated land, amount of crop production, method of cultivation, number of livestock, oxen out put, situation of tsetse infestation and trypanosomiasis prevalence and environmental situations in the area, etc. Survey data was manipulated and spatially presented by creating a spatial database in GIS software and using spatial facilities such as grid interpolation, proximity analysis, density calculation, map query, grid analysis and layout facilities. The project had no socio-economic baseline data thus, farmers' recall method was applied as alternative source of information. In addition to this, due to the absence of recent satellite image, it was not possible to compliment the agriculture sample survey with remote sensing data. As a result it was not possible to assess the land use! cover and environmental change analysis at the desired level. Assessment based on the available information, showed that the so far undertaken tsetse control intervention by STEP has enabled to significantly reduce the tsetse and trypanosomiasis problem in the area. As a result, livestock health condition has improved while, livestock body and growth condition have not shown similar improvement mainly due to feed and water scarcity. There has been a clear shift from hand cultivation to the use of oxen power while average cultivated size and production of major cereals that normally require oxen power for their CUltivation has increased. The impact is more visible in kola areas, probably due to the f act that these areas had been highly affected by the problem and where most impact is expected as a result of the control intervention. The application of advanced survey and monitoring tools, including remote sensing and GIS, has in general, allowed appropriate situation analysis. Finally, it was recommended that any project need to undertake baseline as well as regular monitoring surveys enabling data collection for future project impact assessments and the use of recent satellite image for detailed land use! cover change analysis. Key words: STEP, Impact Assessment, Remote Sensing and GIS, Tsetse fly, Trypanosomiasis, Apparent Fly



STEP, Impact Assessment, Remote Sensing and GIS, Tsetse fly, Trypanosomiasis, Apparent Fly