Spatio-Temporal Dynamic of Land Use in the Dja-Odzala-Minkébé Landscape between Cameroon, Congo and Gabon: Influence on the Evolution of Forest Cover in a Context of Cross-Border Cooperation

M. Tadoum, M. Tchamba, Armand Tanougong
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引用次数: 2

Abstract

This study is being carried out in the cross-border area of the tri-national Dja-Odzala-Minkebe (TRIDOM), subject of a cooperation agreement between Cameroon, Congo and Gabon in 2005. The purpose of this study is to analyze the dynamics of changes in land use in the context of cross-border cooperation. Geographic information systems and remote sensing were used to produce the various land use maps. For this purpose, the MERIS satellite images for the periods 1992, 2005 and 2018 were used. The exploration of the different images and the field visits made it possible to identify the following six land use classes: dense forests, degraded/deforested forests, savannas, swamp forests, buildings and bare soils, water surfaces. It emerges that the TRIDOM landscape is mainly occupied by dense forests which represent 97.02%, 96.72% and 96.52% respectively in 1992, 2005 and 2018. Then, degraded/deforested forests and savannas which would correspond to cultivation areas and fallow land only represent respectively 1.06% and 0.68% of the landscape in 1992. This proportion in 2005 is respectively 1.22% and 0.77%, whereas in 2018, it is respectively 1.36% and 0.81% of the massif. The landscape of TRIDOM has not experienced any significant land use change during the period after the signing of the cooperation agreement. Historical rates of deforestation are low during the period under study. They are estimated at 0.042% and 0.030% respectively for the period 1992-2005 and the period 2005-2018. These low rates of deforestation seem to be due to the measures taken to secure and sustainably manage the massif taken by the three countries, the low population density in this area and the still difficult level of accessibility of a large part of the massif.
喀麦隆-刚果-加蓬dja - odzala - mink景观土地利用时空动态:跨境合作背景下森林覆盖演变的影响
这项研究正在三国Dja-Odzala-Minkebe (TRIDOM)的跨境地区进行,该地区是2005年喀麦隆、刚果和加蓬之间一项合作协议的主题。本研究的目的是分析跨境合作背景下土地利用变化的动态。利用地理信息系统和遥感技术制作各种土地利用地图。为此,使用了1992年、2005年和2018年期间的MERIS卫星图像。通过对不同图像的探索和实地考察,可以确定以下六种土地使用类别:茂密森林、退化/毁林森林、稀树草原、沼泽森林、建筑物和裸露的土壤、水面。结果表明,1992年、2005年和2018年TRIDOM景观以茂密森林为主,占比分别为97.02%、96.72%和96.52%。1992年,退化/毁林的森林和稀树草原分别只占耕地和休耕地的1.06%和0.68%。2005年这一比例分别为1.22%和0.77%,2018年这一比例分别为1.36%和0.81%。在合作协议签署后的一段时间内,TRIDOM的景观没有发生任何重大的土地利用变化。在研究期间,森林砍伐的历史速度很低。1992-2005年和2005-2018年期间,这一比例分别为0.042%和0.030%。这些低森林砍伐率似乎是由于这三个国家为保护和可持续管理该地块而采取的措施,该地区的人口密度低,以及该地块的大部分地区仍然难以进入。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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