Integration of RS/GIS in Assessing the National Great Green Wall Woodlots/Orchards in Katagum LGA, Bauchi State, Nigeria

Abstract

The study is based on the premise that climate change and desertification have strong connection in the ecosystem. Because desertification affects climate change through the loss of fertile soil and corresponding vegetation, it also has important repercussions for the global climate system. Through the Great Green Wall (GGW) tree planting project initiatives, a lot has been achieved elsewhere hence this study. In Nigeria, the programme was introduced in Bauchi State (northern Nigeria) as one of the 11 front line states where desertification is observed. The study was conducted under the hypothetical assumption that the planting of Woodlots and Orchards can help checkmate and control the seeming desertification in the Katagum Local Government Area of Bauchi State, Nigeria. Six woodlots and Orchards were identified and mapped using the Google Earth image visualization platform and the spatial extent of change were determined in hectare (Ha) using the digitizing tool in the software. Except Dugunde (which reduced from 2,499.65 to 2,265.96 Ha), the rest increased within the period under review. Dagoro increased from 371.45 Ha to 372.91 Ha, followed by Dangazau (324.02 to 328.05 Ha), Gambaki (1,154.04 to 1.167.07 Ha), Dugunde 2 (469.42 to 537.74 Ha), and Dugunde 3 (719.58 to 749.61). The Orchard and Woodlots’ growth is understandable because of continuous watering and tending of the vegetation over the years. From sampled questionnaires, the study further reveals that the Woodlots and Orchards are very effective mechanism in controlling desertification in the Northern State. The study shows that the locals are satisfied with the project and are ready to support the programme because it provided employment for them, and also helps to preserve the environment and tree species. The satisfaction with the use of woodlots and orchards