The dramatic droughts in West Africa from the 1960s to the 1990s compelled Burkina Faso to implement soil and water conservation (SWC) measures in the late 1970s. The purpose was to combat land degradation (e.g., desertification) in areas that experienced a decrease in vegetation productivity. In this study, normalized difference vegetation index (NDVI) trends from 2002 to 2016 were analyzed using the Mann‐Kendall test to explore the spatio‐temporal variations of vegetation at SWC and non‐SWC sites in selected regions of Burkina Faso. On average, NDVI increased by 3.6% annually from 2002 to 2016. Approximately 81% of the SWC sites experienced increasing (greening) trends, whereas 78% of the non‐SWC sites showed negative (browning) trends. Typically, SWC measures in Burkina Faso, such as zai (traditional planting pits use to foster the retention of soil moisture and increase soil nutrients) and half‐moons, are considered to have significant impacts on vegetation changes as visible from the NDVI. The results demonstrate that the implementation of SWC measures distinctly influences the vegetation growth in Burkina Faso. Thus, these findings could support regional and local informed decision‐making in the context of sustainable land use planning and evaluation of ecosystem services.

中文翻译：

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利用MODIS NDVI评价布基纳法索水土保持措施对植被的影响

从1960年代到1990年代西非的严重干旱迫使布基纳法索在1970年代末实施水土保持（SWC）措施。目的是在植被生产力下降的地区消除土地退化（例如荒漠化）。在这项研究中，我们使用Mann-Kendall检验分析了2002年至2016年的标准化差异植被指数（NDVI）趋势，以探索布基纳法索选定地区西南太平洋和非西南太平洋站点植被的时空变化。从2002年到2016年，NDVI平均每年增长3.6％。大约81％的SWC站点经历了（绿化）趋势增加，而78％的非SWC站点则呈现出负（褐变）趋势。通常，SWC措施在布基纳法索（例如zai）（传统的种植坑用于促进土壤水分的保留并增加土壤养分）和半月形，被认为会对植被变化产生重大影响，如NDVI所示。结果表明，SWC措施的实施对布基纳法索的植被生长有明显影响。因此，这些发现可在可持续土地利用规划和生态系统服务评估的背景下，为区域和地方知情决策提供支持。