当前位置: X-MOL 学术Limnol. Oceanogr. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Natural and anthropogenic controls on lake water-level decline and evaporation-to-inflow ratio in the conterminous United States
Limnology and Oceanography ( IF 4.5 ) Pub Date : 2022-05-28 , DOI: 10.1002/lno.12097
C Emi Fergus 1 , J Renée Brooks 2 , Philip R Kaufmann 2, 3 , Amina I Pollard 4 , Richard Mitchell 4 , G John Geldhof 5 , Ryan A Hill 2 , Steven G Paulsen 2 , Paul Ringold 2 , Marc Weber 2
Affiliation  

Lake water levels are integral to lake function, but hydrologic changes from land and water management may alter lake fluctuations beyond natural ranges. We constructed a conceptual model of multifaceted drivers of lake water levels and evaporation-to-inflow ratio (Evap : Inflow). Using a structural equation modeling framework, we tested our model on (1) a national subset of lakes in the conterminous United States with minimal water management to describe natural drivers of lake hydrology and (2) five ecoregional subsets of lakes to explore regional variation in water management effects. Our model fits the national and ecoregional datasets and explained up to 47% of variation in Evap : Inflow, 38% of vertical water level decline, and 79% of horizontal water level decline (littoral exposure). For lakes with minimal water management, Evap : Inflow was related to lake depth (β = −0.31) and surface inflow (β = −0.44); vertical decline was related to annual climate (e.g., precipitation β = −0.18) and water management (β = −0.21); and horizontal decline was largely related to vertical decline (β = 0.73) and lake morphometry (e.g., depth β = −0.18). Anthropogenic effects varied by ecoregion and likely reflect differences in regional water management and climate. In the West, water management indicators were related to greater vertical decline (β = 0.38), whereas in the Midwest, these indicators were related to more stable and full lake levels (β = −0.22) even during drought conditions. National analyses show how human water use interacts with regional climate resulting in contrasting impacts to lake hydrologic variation in the United States.

中文翻译:

美国本土湖泊水位下降和蒸发流入比的自然和人为控制

湖泊水位是湖泊功能不可或缺的组成部分,但土地和水资源管理带来的水文变化可能会改变湖泊波动,使其超出自然范围。我们构建了湖泊水位和蒸发流入比(蒸发:流入)的多方面驱动因素的概念模型。使用结构方程建模框架,我们在以下方面测试了我们的模型:(1) 美国本土湖泊的一个国家子集,水资源管理最少,以描述湖泊水文的自然驱动因素;(2) 五个生态区域湖泊子集,以探索区域变化水管理效果。我们的模型符合国家和生态区域数据集,并解释了高达 47% 的 Evap 变化:入流、38% 的垂直水位下降和 79% 的水平水位下降(沿海暴露)。对于水资源管理最少的湖泊,Evap :β  = −0.31) 和地表入流 ( β  = −0.44);垂直下降与年度气候(例如,降水β  = -0.18)和水资源管理(β  = -0.21)有关;水平下降主要与垂直下降( β  = 0.73)和湖泊形态学(例如,深度β  = -0.18)有关。人为影响因生态区而异,可能反映了区域水资源管理和气候的差异。在西部,水资源管理指标与更大的垂直下降有关 ( β  = 0.38),而在中西部,这些指标与更稳定和饱满的湖泊水位有关 ( β = −0.22) 即使在干旱条件下。国家分析显示人类用水如何与区域气候相互作用,从而对美国的湖泊水文变化产生对比影响。
更新日期:2022-05-28
down
wechat
bug