通过贝叶斯的等级建模,通过贝叶斯的等级建模,通过美国各地出口的空间时间变化
Kimia Karimi1, Daniel R Obenour1,2
1Center for Geospatial Analytics, North Carolina State University, Raleigh, North Carolina 27695, United States.
Environmental science & technology
|May 17, 2024
概括
这项研究使用贝叶斯模型量化了美国各地的年度出口,确定了降水量是农业和地质流失到水道的关键驱动因素.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 地质化学 地质化学
背景情况:
- 人类产生的输入通过河流出口造成水质问题.
- 在大型空间尺度上,水文出口的估计通常是不可用的.
- 营养预算量化了流域营养进出口,但缺乏大规模的出口数据.
研究的目的:
- 开发一个贝叶斯层次模型,用于估计美国连续地区的年度出口.
- 确定损失的主要驱动因素,包括农业,城市和地质源.
- 绘制损失热点的地图,了解影响河流出口的因素.
主要方法:
- 开发了贝叶斯层次模型来估计年度出口.
- 集成的农业,城市和地质来源.
- 利用了河流负载的广泛校准数据集,并考虑了不同的降水条件.
主要成果:
- 降水显著影响人为的水文出口率,特别是来自农业的.
- 地质源是整体河流出口的重要贡献者.
- 绘制了美国损失的热点,突出了关键的贡献因素.
结论:
- 贝叶斯分层模型提供了对全国范围内出口的可靠估计.
- 降水是调节各种来源出口的关键因素.
- 了解地质的贡献对于全面的水质管理至关重要.
相关概念视频
01:21The Phosphorus Cycle
36.8K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
36.8K
01:23Mechanistic Models: Compartment Models in Individual and Population Analysis
38
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
38