干旱区生态环境知识资源中心(Arid): Evidence for high-elevation salar recharge and interbasin groundwater flow in the Western Cordillera of the Peruvian Andes

Arid

DOI	10.5194/hess-26-483-2022
	Evidence for high-elevation salar recharge and interbasin groundwater flow in the Western Cordillera of the Peruvian Andes
	Alvarez-Campos, Odiney; Olson, Elizabeth J.; Welp, Lisa R.; Frisbee, Marty D.; Zuniga Medina, Sebastian A.; Diaz Rodriguez, Jose; Roque Quispe, Wendy R.; Salazar Mamani, Carol, I; Arenas Carrion, Midhuar R.; Manuel Jara, Juan; Ccanccapa-Cartagena, Alexander; Jafvert, Chad T.
通讯作者	Welp, LR ; Frisbee, MD (corresponding author)，Purdue Univ, Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA.
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2022
卷号	26 期号:2 页码:483-503
英文摘要	Improving our understanding of hydrogeological processes on the western flank of the central Andes is critical to communities living in this arid region. Groundwater emerging as springs at low elevations provides water for drinking, agriculture, and baseflow. However, the high-elevation sources of recharge and groundwater flow paths that convey groundwater to lower elevations where the springs emerge remain poorly quantified in the volcanic mountain terrain of southern Peru. In this study, we identified recharge zones and groundwater flow paths supporting springs east of the city of Arequipa and the potential for recharge within the high-elevation closed-basin Lagunas Salinas salar. We used general chemistry and isotopic tracers (delta O-18, delta H-2, and H-3) in springs, surface waters (rivers and the salar), and precipitation (rain and snow) sampled from March 2019 through February 2020 to investigate these processes. We obtained monthly samples from six springs, bimonthly samples from four rivers, and various samples from high-elevation springs during the dry season. The monthly isotopic composition of spring water was invariable seasonally in this study and compared to published values from a decade prior, suggesting that the source of recharge and groundwater flow paths that support spring flow is relatively stable with time. The chemistry of springs in the low-elevations and mid-elevations (2500 to 2900 m a.s.l.) point towards a mix of recharge from the salar basin (4300 m a.s.l.) and mountainblock recharge (MBR) in or above a quefluales forest ecosystem at similar to 4000 m a.s.l. on the adjacent Pichu Pichu volcano. Springs that clustered along the Rio Andamayo, including those at 2900 m a.s.l., had higher chloride concentrations, indicating higher proportions of interbasin groundwater flow from the salar basin likely facilitated by a high degree of faulting along the Rio Andamayo valley compared to springs further away from that fault network. A separate groundwater flow path was identified by higher sulfate concentrations (and lower Cl-/SO4-2 ratios) within the Pichu Pichu volcanic mountain range separating the city from the salar. We conclude that the salar basin is not a hydrologic dead end. Instead, it is a local topographic low where surface runoff during the wet season, groundwater from springs, and subsurface groundwater flow paths from the surrounding mountains converge in the basin, and some mixture of this water supports groundwater flow out of the salar basin via interbasin groundwater flow. In this arid location, high-elevation forests and the closed-basin salar are important sources of recharge supporting low-elevation springs. These features should be carefully managed to prevent impacts on the down-valley water quality and quantity.
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000751423700001
WOS关键词	PAMPA DEL TAMARUGAL ; MOUNTAIN-FRONT ; LAGUNA SALINAS ; SOUTHERN PERU ; WATER YIELD ; ISOTOPE ; BASIN ; DELTA-O-18 ; CHEMISTRY ; HYDROLOGY
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376494
作者单位	[Alvarez-Campos, Odiney; Olson, Elizabeth J.; Welp, Lisa R.; Frisbee, Marty D.] Purdue Univ, Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA; [Zuniga Medina, Sebastian A.; Diaz Rodriguez, Jose] Univ Nacl San Agustin Arequipa, Dept Geol Geofis & Minas, Arequipa, Peru; [Roque Quispe, Wendy R.; Salazar Mamani, Carol, I; Arenas Carrion, Midhuar R.; Manuel Jara, Juan] Univ Nacl San Agustin Arequipa, Dept Ingn Ambiental, Arequipa, Peru; [Ccanccapa-Cartagena, Alexander; Jafvert, Chad T.] Purdue Univ, Lyles Sch Civil Engn, W Lafayette, IN 47907 USA; [Ccanccapa-Cartagena, Alexander] Univ Nacl San Agustin Arequipa, Escuela Profes Antropol, Av Venezuela S-N, Arequipa 04000, Peru; [Jafvert, Chad T.] Purdue Univ, Div Environm & Ecol Engn, W Lafayette, IN 47907 USA
推荐引用方式 GB/T 7714	Alvarez-Campos, Odiney,Olson, Elizabeth J.,Welp, Lisa R.,et al. Evidence for high-elevation salar recharge and interbasin groundwater flow in the Western Cordillera of the Peruvian Andes[J],2022,26(2):483-503.
APA	Alvarez-Campos, Odiney.,Olson, Elizabeth J..,Welp, Lisa R..,Frisbee, Marty D..,Zuniga Medina, Sebastian A..,...&Jafvert, Chad T..(2022).Evidence for high-elevation salar recharge and interbasin groundwater flow in the Western Cordillera of the Peruvian Andes.HYDROLOGY AND EARTH SYSTEM SCIENCES,26(2),483-503.
MLA	Alvarez-Campos, Odiney,et al."Evidence for high-elevation salar recharge and interbasin groundwater flow in the Western Cordillera of the Peruvian Andes".HYDROLOGY AND EARTH SYSTEM SCIENCES 26.2(2022):483-503.