通过新的高分辨率排放数据,促进非洲的水安全
Komlavi Akpoti1, Naga Manohar Velpuri2, Naoki Mizukami3
1International Water Management Institute (IWMI), Accra, Ghana. k.akpoti@cgiar.org.
Scientific data
|November 5, 2024
概括
一个新的非洲河流排放数据集 (VegDischarge v1) 使用 2001-2021 年的合建模,量化水资源的可用性,并为基础设施规划和气候适应性提供信息.
科学领域:
- 水文学和地球系统科学 地球系统科学
- 环境建模环境建模
- 遥感应用 遥感应用
背景情况:
- 准确的河流排放数据对于非洲的水资源管理至关重要.
- 现有的数据集可能缺乏详细分析所需的空间分辨率或时间覆盖.
- 结合式建模方法为生成高准确度水文数据集提供了一个有希望的途径.
研究的目的:
- 为非洲引入VegDischarge v1,一个全面的天然河流排放数据集.
- 提供可靠的高分辨率 (1公里) 数据集,涵盖2001-2021年期间.
- 量化大陆和海洋盆地特定排放贡献.
主要方法:
- 采用了结合模拟系统,集成了农水学VegET模型和mizuRoute路由模型.
- 利用遥感数据和水文建模来模拟和路由下水.
- 使用R2,NSE和KGE等既定指标验证模型性能.
主要成果:
- VegDischarge v1覆盖了整个非洲的64,000多个河流段.
- 模型性能与大陆规模的R2 (0.5-0.9),NSE (0.6-0.9) 和KGE (0.5-0.8) 显示出强大的可靠性.
- 非洲的总年平均排放量为3271.4公里·年−1,对主要海洋盆地的详细贡献.
结论:
- "VegDischarge v1"数据集提供了对非洲水资源的可用性及其变化有价值的见解.
- 该数据集支持对水基础设施规划和资源分配的知情决策.
- 研究结果有助于在整个非洲大陆制定有效的气候弹性战略.
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