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An assessment of land-use change in the Cocoa Belt of south-west Nigeria

机译：尼日利亚西南部可可带土地利用变化评估

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摘要

The Nigerian government is reviving the agricultural sector to shift from its sole dependence on crude oil for foreign exchange earnings. Thus, the Cocoa Belt (agro-ecological region) of southwest Nigeria is important to the national economy. With the increasing demand for land to grow export crops and to meet other needs such as settlement expansion, land use is changing. Land-use data and mapping are essential inputs for the process of formulating, implementing, and monitoring policy with the aim of reducing the impact of land-cover/land-use (LCLU) change. Land-use types, their spatial extent and dynamics over a 25 year period are examined from multispectral images of the Landsat Thematic Mapper and Enhanced Thematic Mapper Plus. This study examines the main drivers of LCLU change and the environmental impact. Results show that forest conversion to agricultural lands is the main trend, and cultivation is the main cause of forest loss in the study area. The need to produce food for the teeming population, coupled with the government's policy to expand export crop production is resulting in the loss of native forest, including areas designated as forest reserves. Results underscore the need for deliberate land-use planning and management in this belt. This study reveals the situation of unplanned and rapid changes to land use in the context of a developing country where explicit policies to cater for such activities are absent.
机译：尼日利亚政府正在复兴农业部门，以摆脱对原油的唯一依赖以获取外汇收入。因此，尼日利亚西南部的可可带（农业生态区）对国民经济至关重要。随着对土地的需求不断增长，以种植出口作物和满足其他需求（如定居点扩展），土地用途正在发生变化。土地利用数据和制图是制定，实施和监测政策过程中必不可少的输入，旨在减少土地覆盖/土地利用（LCLU）变化的影响。从Landsat专题测绘仪和增强型专题测绘仪Plus的多光谱图像检查了25年期间的土地利用类型，其空间范围和动态。这项研究考察了LCLU变化和环境影响的主要驱动因素。结果表明，研究区森林退耕是主要趋势，而种植则是造成森林流失的主要原因。为人口众多的人生产粮食的需求，再加上政府扩大出口农作物产量的政策，导致天然林（包括指定为森林保护区）的流失。结果强调了在这条带上进行有计划的土地利用规划和管理的必要性。这项研究揭示了在发展中国家缺乏针对此类活动的明确政策的情况下，土地使用的计划外和快速变化的情况。

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  • 来源
    《International journal of remote sensing》 |2013年第8期|2858-2875|共18页
  • 作者

    Felicia O. Akinyemi;

  • 作者单位

    Faculty of Architecture and Environmental Design, Kigali Institute of Science and Technology,Kigali, Rwanda;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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