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首页> 外文期刊>Land Degradation and Development >Land use/land cover change analysis and its impact on soil properties in the northern part of Gadarif region, Sudan.
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Land use/land cover change analysis and its impact on soil properties in the northern part of Gadarif region, Sudan.

机译：苏丹加达里夫地区北部的土地利用/土地覆被变化分析及其对土壤特性的影响。

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摘要

Several decades of intensive dry land farming in the Gadarif region, located in the Eastern part of Sudan, has led to rapid land use/land cover (LULC) changes mainly due to agricultural expansion, government policies and environmental calamities such as drought. In this paper, an attempt has been made to analyse and monitor the LULC changes using multi-temporal Landsat data for the years 1979, 1989 and 1999 and ASTER data for the year 2009. In addition, efforts were made to discuss the impact of LULC changes on the selected soil properties. For this, a post-classification comparison technique was used to detect LULC changes from satellite images. Primarily, three main LULC types were selected to investigate the properties of soil, namely, cultivated land, fallow land and woodland. Moreover, soil samples were also collected at two depths of surface soil from ten sample plots for each of the LULC type. For these soil samples, various soil properties such as texture, bulk density, organic matter, soil pH, electrical conductivity, sodium adsorption ratio, phosphorous and potassium were analysed. The results showed that a significant and extensive change of LULC patterns has occurred in the last three decades in the study area. Further, laboratory tests revealed that soil properties were significantly affected by these LULC changes. The change of the physical and chemical properties of the soil may have attributed to the changes in the LULC resulting in land degradation, which in turn has led to a decline in soil productivity.
机译：位于苏丹东部的加达里夫地区数十年来集约化的旱地耕作，主要是由于农业扩张，政府政策和干旱等环境灾难，导致土地使用/土地覆盖率（LULC）的快速变化。本文尝试使用1979年，1989年和1999年的多时相Landsat数据和2009年的ASTER数据来分析和监测LULC的变化。此外，还努力讨论了LULC的影响改变所选土壤的性质。为此，使用了分类后比较技术来检测卫星图像中的LULC变化。首先，选择了三种主要的LULC类型来研究土壤的特性，即耕地，休耕地和林地。此外，对于每种LULC类型，还从十个样地中的两个表层土壤深度采集了土壤样品。对于这些土壤样品，分析了各种土壤特性，例如质地，堆积密度，有机质，土壤pH，电导率，钠吸附率，磷和钾。结果表明，在过去的三十年中，研究区域的LULC模式发生了重大而广泛的变化。此外，实验室测试表明，土壤性质受到这些LULC变化的显着影响。土壤的物理和化学性质的变化可能归因于土地利用，土地利用变化和土地利用的变化，导致土地退化，进而导致土壤生产力下降。

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