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40 2019 ND-CP 413905
- Điều hướng trang này:
- AN INTEGRATED FRAMEWORK FOR LAND RESOURCES ANALYSIS IN SOUTHEASTERN NIGERIA
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Annex 4 Case studies This chapter summarizes examples of how participatory techniques, as described in the previous section, can be integrated and combined with more conventional biophysical surveys. The first example is from southeastern Nigeria, where integrated land resources analysis was applied. The second example focuses on improved integrated scientific and local land and soil mapping in northwest Syria. Seven further examples are briefly annotated, some combining economic analysis with natural resources surveys, others combining resources survey with participatory methods, and some integrating all three. AN INTEGRATED FRAMEWORK FOR LAND RESOURCES ANALYSIS IN SOUTHEASTERN NIGERIA This example is based on Gobin et al. (1998, 2000). It demonstrates first, how well- established biophysical survey techniques can be combined with participatory methods at the field survey or village scale; and secondly, how this combined knowledge can be extended, or scaled up, to the semi-detailed or catchment scale. It makes use of the method of integrated toposequence analysis. Integrated toposequence analysis (ITA) is an amalgam of conventional biophysical surveying techniques and participatory rural appraisals along toposequences (Figure A4-1), and couples local knowledge and scientific information on land resources and land use systems in a georeferenced framework. The toposequence is essentially the same as the long-established concept of the soil catena (Milne 1935, 1947). ITA is used to scale up information from field observation to toposequence, and consists of four major components (upper part of Figure A4-2): ¾ Relating land use to land cover, physiography and soil; ¾ Linking cropping systems to both biophysical and farmers’ soil characterization; ¾ Analysing the dynamics of prevailing land use and cropping systems along toposequences; ¾ Establishing a framework for land resource mapping taking into account local knowledge. The results from ITA are scaled up to semidetailed or catchment scale through integrated land resources analysis, combining local knowledge and scientific data and complementing well-established survey techniques to assess land resources and land resource utilization. Integrated land resources analysis adds a dimension to the findings from the integrated toposequence analysis by combining established geographic research methods with participatory rural appraisals (Figure A4-2), and consists of the following major components: ¾ Verifying and integrating local and scientific information on soil-landscape and land cover by conducting additional toposequences; ¾ Relating the toposequence findings to their surroundings using aerial photograph interpretation and processing in a GIS environment; ¾ Analysing the spatial and temporal dynamics of land cover or use patterns through resource mapping, timelines and other participatory methods; and ¾ Relating land cover patterns to land use, and land use to soil-landscape. Land evaluation – towards a revised framework 102 LOCAL CLASS PHYSIOGRAPHY Accumulation Glacis with stream River terrace Backswamp Floodplain and river channel Upland clay Upland clay Lowland clay (riveerside) Lowland sand (riverside) Ferric Acrisol (110 cm) Ferric and skeletic from 50 cm Ferric Acrisol Ferric from 50 cm Eutric Gleysol (100 cm) Gleyic from 35 cm Dystric Fluvisol (160 cm) Gleyic from 100 cm Cassava/maize/groudnut/beans None Irrigated vegetables/pepper Yam/cocoyam/cassava Rice/cassava 1 yr of cassava fallow Residual moist cropping Irrigated vegetables Yam/cocoyam Upland rice/cassava 1 yr cassava fallow Early cropping Irrigated vegetables Y am/cassava/maize/beans Upland rice/cassava 3 years incl. 1 year cassava fallow Early planting of seed yam Irrigated vegetables near streams RAINY SEASON F ALLOW DRY SEASON VEGETATION LAND USE OTHER USES Moist forest Grass fallow farmland/settlement Upland rice Moist forest Continous cropping Tree products Riparian forest Continuous cropping Tree products Riparian forest Continuous cropping Tree products tải về 0.57 Mb. Chia sẻ với bạn bè của bạn:
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