期刊
WATER
卷 12, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/w12092630
关键词
stable isotopes; water sources; natural tracers; glaciers; rock glaciers; groundwater; snow; Central Andes
资金
- ANID FONDECYT Postdoctoral project [3180374]
- project ANID FONDAP [1511009]
- ANID FONDECYT [3180374, 1201714]
- Research Nucleus in Nature Based Solutions of the Pontifical Catholic University of Valparaiso (PUCV) [39.431/2020]
The Aconcagua river basin (Chile, 32 degrees S) has suffered the effects of the megadrought over the last decade. The severe snowfall deficiency drastically modified the water supply to the catchment headwaters. Despite the recognized snowmelt contribution to the basin, an unknown streamflow buffering effect is produced by glacial, periglacial and groundwater inputs, especially in dry periods. Hence, each type of water source was characterized and quantified for each season, through the combination of stable isotope and ionic analyses as natural water tracers. The delta O-18 and electric conductivity were identified as the key parameters for the differentiation of each water source. The use of these parameters in the stable isotope mixing simmr model revealed that snowmelt input accounted 52% in spring and only 22-36% during the rest of the year in the headwaters. While glacial supply contributed up to 34%, both groundwater and periglacial exhibited a remarkable contribution around 20% with some seasonal variations. Downstream, glacial contribution averaged 15-20%, groundwater seasonally increased up to 46%, and periglacial input was surprisingly high (i.e., 14-21%). The different water sources contribution quantification over time for the Aconcagua River reported in this work provides key information for water security in this territory.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据