The Budyko shape parameter as a descriptive index for streamflow loss
The Budyko shape parameter as a descriptive index for streamflow loss
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DOI：
10.3389/frwa.2023.1258367
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发表时间：
2023-09
影响因子：
2.9
通讯作者：
H. Tran;Chen Yang;L. Condon;Reed M Maxwell
中科院分区：
文献类型：
--
作者：
H. Tran;Chen Yang;L. Condon;Reed M Maxwell
全球变暖导致的蒸散量增加正在减少全球河源流域的径流量。然而，由于地形复杂，这些径流损失并不均匀。为了更好地理解径流损失的非均匀性，我们使用Budyko形状参数（ω）作为诊断工具。我们将ω与美国重要的上游流域--上科罗拉多河流域（UCRB）37年的水文模拟结果进行了拟合。我们将UCRB分为两类：海拔高、坡度陡的高峰流域和海拔较低、坡度平缓的山谷流域。我们的研究结果表明流量损失和ω之间的关系。径流损失较大的河谷流域的ω大于3.1，而径流损失较小的洪峰流域的平均ω为1.3。这项工作突出了使用ω作为径流损失的指标，可以推广到其他水源流域系统。
Increases in evapotranspiration (ET) from global warming are decreasing streamflow in headwater basins worldwide. However, these streamflow losses do not occur uniformly due to complex topography. To better understand the heterogeneity of streamflow loss, we use the Budyko shape parameter (ω) as a diagnostic tool. We fit ω to 37-year of hydrologic simulation output in the Upper Colorado River Basin (UCRB), an important headwater basin in the US. We split the UCRB into two categories: peak watersheds with high elevation and steep slopes, and valley watersheds with lower elevation and gradual slopes. Our results demonstrate a relationship between streamflow loss and ω. The valley watersheds with greater streamflow loss have ω higher than 3.1, while the peak watersheds with less streamflow loss have an average ω of 1.3. This work highlights the use of ω as an indicator of streamflow loss and could be generalized to other headwater basin systems.