The dynamics of inland valley wetlands landuse landcover (LULC) changes are of ecological and economical significance hence necessitating up-to-date datasets of resource status. Nalwekomba inland valley wetland is highly agriculturally utilised yet ecologically important wetland threatened with conversion. Historical LULC data sets as bench marks justifying wetland conservation are lacking. Therefore, the spatial–temporal LULC changes in Nalwekomba inland valley wetland were analysed through a combination of remote sensing and GIS, using satellite images of 1990, 2000, 2010 and 2020 as reference years. Results revealed variable dominance of grassland and tree cover for the wetland and its catchment over the years; 32.7% and 35.3% and 30.9% and 29.8%, respectively, for 1990 and 41.4% and 30.4% and 26.3% and 29.1% for 2020. The 30-year analysis revealed increasing area-shifts for cropland and built-up/settlement of 265.7% and 76.2%, respectively, reducing cover for shrubland by 78.31% in the wetland. Similar trend emerged for its catchment. Highest net cover gains and losses identified between 1990 and 2000 were for cropland and tree cover respectively. The observed trend points to the need for landuse planning and landcover management to enhance ecosystems' resilience to support sustainable livelihoods dependent on this ecosystem.

中文翻译：

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东非内陆河谷湿地土地利用土地覆盖变化动态

内陆河谷湿地土地利用土地覆盖（LULC）变化的动态具有生态和经济意义，因此需要最新的资源状况数据集。纳尔韦孔巴内陆河谷湿地是农业利用率很高的湿地，但具有重要生态意义的湿地面临着转变的威胁。缺乏历史 LULC 数据集作为证明湿地保护合理性的基准。因此，以1990年、2000年、2010年和2020年的卫星影像为参考年，通过遥感和GIS相结合的方式，分析了纳尔韦孔巴内陆河谷湿地土地利用和覆盖率的时空变化。结果显示，多年来湿地及其流域的草地和树木覆盖的优势存在差异；1990 年分别为 32.7%、35.3%、30.9% 和 29.8%，2020 年分别为 41.4%、30.4%、26.3% 和 29.1%。 30 年分析显示，耕地面积转移和建设/定居不断增加。分别减少了265.7%和76.2%，湿地灌丛覆盖度减少了78.31%。其流域也出现了类似的趋势。1990 年至 2000 年间，农田和树木的净覆盖率增加和减少幅度最大。观察到的趋势表明，需要进行土地利用规划和土地覆盖管理，以增强生态系统的复原力，以支持依赖于该生态系统的可持续生计。