The Manso River Drainage System in the Northern Patagonian Andes: Hydrological, Hydrochemical and Nutrient Dynamics

Lecomte, Karina Leticia; Pasquini, Andrea I.; Sepúlveda, Laura; Temporetti, Pedro; Pedrozo, Fernando; Depetris, Pedro J.

doi:10.1007/978-3-030-89676-8_2

Cited by 1 publication

(7 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results are of particular interest considering the changes in temperature and precipitation recorded in this region during the last decades. Time series at stations located in the region showed an increase in temperature and a reduction in precipitation (e.g., Lecomte et al, 2022; Masiokas et al, 2008; Pasquini et al, 2008). Despite the negative precipitation trend, the Manso Superior River, which constitutes a recharge area, showed positive trends in its discharge due to the contribution of meltwaters, agreeing with the fact that glaciers in the region are thawing.…”

Section: Resultsmentioning

confidence: 99%

“…This hydrological behaviour also reflects the relative influence of the different sources of water in the basin. As Lecomte et al (2022) also pointed out, the river is highly sensitive to the effects of precipitation or glacier meltwater inputs. In the upper basin, the Manso Superior River has a module of about 5 m 3 /s at Pampa Linda station (record period 2013–2020), and as the river flows downstream it receives several streams and increases its module to 12.5 m 3 /s at Mascardi station (record period 1970–2020, Figure 1).…”

Section: Study Sitementioning

confidence: 98%

“…Piper (1944) Diagram showing the chemical classification of Manso river system's waters. Modified from Lecomte et al (2022)…”

Section: Study Sitementioning

confidence: 99%

“…Thus, the Manso River discharge shows a bimodal distribution. Along the hydrological year (i.e., April to March), the first peak occurs during the austral winter due to the effect of the rainy season, while the second discharge peak begins at the end of austral spring due to snowmelt (Lecomte et al, 2022). This hydrological behaviour also reflects the relative influence of the different sources of water in the basin.…”

Section: Study Sitementioning

confidence: 99%

“…The general aquatic geochemistry of springs and streams from the Manso River system has been previously defined by Chillrud et al (1994), Pedrozo et al (1993), Pedrozo and Chillrud (1998) and Lecomte et al (2022). The relative abundance of anions is HCO 3 À > SO 4 2À ≥ Cl À , whereas the cationic relative abundance is Ca 2+ > Mg 2+ > Na + > K + .…”

mentioning

confidence: 99%

See 4 more Smart Citations

Isotopic signature of a glacial influenced hydrological system in northern Patagonia, Argentina

Sepúlveda

Echegoyen

Martín

et al. 2022

Hydrological Processes

Self Cite

View full text Add to dashboard Cite

High glacial mountain environments around the world are important water reservoirs and are extremely sensitive to the effects of climate change. Considering that climate change affects snow accumulation and glacial melting, it is essential to understand the runoff generation and hydrological dynamics in these type of systems. Andean glaciers have shown a retreating and thinning pattern since the start of the 21st century. Regarding this, the stable isotopic composition of waters is useful to assess the contributions from different sources (i.e., glaciers, precipitation, and tributaries' inputs) to rivers. Several Patagonian mountain rivers have Andean glaciers in their headwaters, one of which is the Manso River. In this basin, over the last 30 years, the Ventisquero Negro Glacier (Manso Glacier's regenerated tongue) experienced a rapid thinning and recession that generated a proglacial lake, called Manso proglacial Lake. In this study, topographic effects upon the stable isotopic composition of river waters (δ2H and δ18O) are recognized, particularly, the altitude effect. The stable isotope composition of the Manso River varies downstream, evolving to a composition more enriched in heavy isotopes in the lower basin, likely due to altitude effects and the progressive evaporation that mainly occurs in the lakes' surfaces that the river crosses. Results show that glacial meltwater is the major water contributor in the upper basin during early fall. In the rest of the basin the stable isotopic composition of the Manso River is mainly controlled by the lakes' isotopic signatures and is highly influenced by two tributary rivers. The concordance between isotopic models and hydrological data demonstrates that stable isotopes constitute a valuable tool to quantify the contribution of different water sources. This has the potential to be particularly useful in areas where discharge data is unavailable.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Study Sitementioning

confidence: 98%

“…Piper (1944) Diagram showing the chemical classification of Manso river system's waters. Modified from Lecomte et al (2022)…”

Section: Study Sitementioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%

mentioning

confidence: 99%