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首页> 外文期刊>Journal of Environmental Management >Land-use intensification and environmental degradation: empirical evidence from irrigated and rain-fed farms in south eastern Nigeria
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Land-use intensification and environmental degradation: empirical evidence from irrigated and rain-fed farms in south eastern Nigeria

机译：土地利用集约化和环境退化：来自尼日利亚东南部灌溉和雨养农场的经验证据

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摘要

When evaluating the potential of irrigation for agricultural production one must consider more than the technical and financial potential and feasibility of the scheme. Issues of environmental and social sustainability must also be considered. The purpose of the paper is to develop a framework for assessing the sustainability of an irrigation scheme and apply it in the context of one such scheme in south eastern Nigeria. The framework for assessment is based on a comparison of differential changes in environmental quality with and without the scheme, and before and after the schemed The author does this by using measured soil characteristics for irrigated and adjacent rain-fed plots of agricultural land; and socioeconomic analysis of other environmental and social impacts of the irrigation scheme.Data were collected through a field survey of the selected irrigated and rain-fed farm plots, qualitative interviews with the farm owners and relevant secondary sources.The analyses find that the soils of the irrigated farms have been significantly degraded more than those of the rain-fed farms to the extent that precludes sustainable practice of arable agriculture on irrigated land in the study area. About 9% of the soils of the irrigated land have been degraded to the extent that they are no longer suitable for arable agriculture. Analyses of the qualitative interviews also find other bio-physical, social and economic impacts that significantly constrain long-term sustainability of arable agriculture in the study area. (c) 2005 Elsevier Ltd. All rights reserved.
机译：在评估农业灌溉潜力时，人们不仅要考虑该计划的技术和经济潜力以及可行性。还必须考虑环境和社会可持续性问题。本文的目的是建立一个评估灌溉计划可持续性的框架，并将其应用于尼日利亚东南部的一项灌溉计划。评估框架的基础是有计划和没有计划的前后环境质量差异变化的比较。作者通过对灌溉土地和邻近的雨水耕作农田使用测得的土壤特征来完成这一工作。以及对灌溉计划的其他环境和社会影响的社会经济分析。通过对选定的灌溉和雨养农田进行实地调查，与农场主进行定性访谈以及相关的次要来源收集数据。灌溉农场的退化程度要比雨养农场大得多，以至于无法在研究区域的灌溉土地上持续进行耕作农业。灌溉土地中约9％的土壤已退化到不再适合耕作农业的程度。定性访谈的分析还发现了其他生物物理，社会和经济影响，这些影响极大地限制了研究区域内耕作农业的长期可持续性。 （c）2005 Elsevier Ltd.保留所有权利。

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