ON THE CALCULATION OF THE MEAN RESIDENCE TIME IN MONOMICTIC LAKES / Sur le calcul du temps moyen de résidence dans les lacs monomictiques

Rossi, Giovanni; Ardente, V.; Beonio-Brocchieri, F.; Diana, Emily

doi:10.1080/02626667509491588

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Znamensky (1981) suggested the inverse of the LTR, known as "the coefficient of external water exchange", to characterize water renewal time in the lakes and reservoirs. For the lakes with thermal homogeneity, the LRT can be calculated using the lake total volume instead of the volume of lake epilimnion (Pilotti et al, 2014;Rossi et al, 1975). Both the lake volume and outflow water flux vary in time, depending on atmospheric conditions (climate and weather), topography changes, human activities and other factors.…”

Section: Datamentioning

confidence: 99%

“…The lake retention time (LRT), also called "the flushing time" in Geyer et al (2000) or "the coefficient of water external exchange" in Doganovsky and Myakisheva (2015), is, among other transport scales, a factor to be taken into account when modelling the water exchange and mixing processes in lakes and estuaries (Monsen et al, 2002;Lincoln et al, 1998). It indicates the time period of water renewal in the lake (Pilotti et al, 2014;Rueda et al, 2006) and is usually expressed in years. There are only a few studies addressing estimates of water transport scales for Antarctic lakes, mostly due to a lack of hydrological observations.…”

Section: Introductionmentioning

confidence: 99%

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Retention time of lakes in the Larsemann Hills oasis, East Antarctica

et al. 2021

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Abstract. This study provides first estimates of the water transport timescale for five lakes located in the Larsemann Hills oasis (69∘23′ S, 76∘20′ E) in East Antarctica. We estimated lake retention time (LRT) as a ratio of lake volume to the inflow and outflow terms of a lake water balance equation. The LRT was evaluated for lakes of epiglacial and landlocked types, and it was assumed that these lakes are monomictic, with water exchange occurring during the warm season only. We used hydrological observations collected in four seasonal field campaigns to evaluate the LRT. For the epiglacial lakes Progress and Nella/Scandrett, the LRT was estimated at 12–13 and 4–5 years, respectively. For the landlocked lakes Stepped, Sarah Tarn and Reid, our results show a great difference in the LRT calculated from the outflow and inflow terms of the water balance equation. The LRTs for these lakes vary depending on the methods and errors inherent to them. We relied on the estimations from the outflow terms, since they are based on hydrological measurements with better quality. Lake Stepped exchanged water within 1.5 years. Sarah Tarn and Lake Reid are endorheic ponds, with water loss mainly through evaporation. Their LRTs were estimated as 21–22 and 8–9 years, respectively. To improve the LRT estimates, special hydrological observations are needed to monitor the lakes and streams during the warm season with a uniform observational programme.

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Section: Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Retention time of lakes in the Larsemann Hills oasis, East Antarctica

et al. 2021

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show abstract

“…Znamensky (1981) suggests the inverse of the LTR known as "the coefficient of external water exchange" to characterize water renewal time in the lakes and reservoirs. For the lakes with thermal homogeneity, the LRT can be calculated using the lake total volume instead of the volume of lake epilimnion (Pilotti et al, 2014;Rossi et al, 1975). Both the lake volume and outflow water flux vary in time, depending on atmospheric conditions (climate and weather), topography changes, human activities and other factors.…”

Section: Datamentioning

confidence: 99%

Retention time of lakes in the Larsemann Hills oasis, East Antarctica

Shevnina¹,

Kourzeneva²,

Dvornikov³

et al. 2020

Preprint

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Abstract. The study gives first estimates of water transport scale for five lakes located in the Larsemann Hills oasis (69º23' S, 76º20' E) in the East Antarctica. We estimated the lake retention time (LRT) as a ratio of the lake volume to the income and outcome terms of a lake water balance equation. The LRT was evaluated for lakes of epiglacial and land-locked types, and it was assumed that these lakes are monomictic with water exchange existing during a warm season only. We used hydrological observations collected in 4 seasonal field campaigns to evaluate the LRT from the outcome and income terms of the water balance equation. For the epiglacial lakes Progress/LH57 and Nella/Scandrett/LH72, the LRT was estimated of 12–13 and 4–5 years, respectively. For the land-locked lakes Stepped/LH68, Sara Tarn/LH71 and Reid/LH70, our results show a big difference in the LRT calculated from the outcome and income components of the water balance equation. The LRT for these lakes vary depending on the methods and errors inherent to them. We suggested to rely on the estimations from the outcome surface runoff since they are based on the hydrological measurements with better quality. Lake Stepped/LH68 exchange water within less then 1.5 years. Lake Sara Tarn/LH71 and Lake Reid/LH70 are the endorheic ponds with the water exchange through mostly evaporation, their LRT was estimated as 21–22 years and from 8–9 years, respectively. To improve the estimates of the LRT, the hydrological observations are needed to monitor the lakes and streams during the warm season with the uniform observational program.

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“…Accounting for spatial distances in larger lakes could result in different mixing patterns of precipitation and surface water inflows. However, in deeper and highly seasonal lakes, the thermal stratification is the key control on how inflow is affected by lake water mixing and therefore influences the probability of water selection for discharge or evaporation (Ambrosetti et al, 2003;Piontelli & Tonolli, 1964;Rossi et al, 1975).…”

Section: Water Resources Researchmentioning

confidence: 99%

On the Use of StorAge Selection Functions to Assess Time‐Variant Travel Times in Lakes

Smith

Tetzlaff

Soulsby

2018

Water Resources Research

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Lakes can store water for long periods of time, which influences the transport of water and hydrologic tracers and changes catchment transit times downstream. However, the impact that the transit time of lakes has on catchment transit times has received little attention to date. We derived water and isotope mass balances for two lakes and examine the use of time‐variant transit time solutions with StorAge Selection functions to estimate the water ages of evaporation and lake outflows. We used the convolution of the StorAge Selection function transit time estimations with inflow transit times to estimate the transit times downstream of each lake. The lakes exhibited contrasting storage effects for discharge; with direct storage effects (newest water exiting during low flow) for a larger lake fed by a small catchment, and inverse storage effects (newest water exiting during high flow) for a smaller lake with a large catchment. The water and isotope mass balance yielded estimates of daily and annual evaporation fluxes, which were similar between the two lakes. The proposed framework is an effective tool to identify the effects of precipitation, surface inflow, and evaporation on the transit times for relatively small, shallow lakes, using a combination of water and isotope mass balance methods.

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ON THE CALCULATION OF THE MEAN RESIDENCE TIME IN MONOMICTIC LAKES / Sur le calcul du temps moyen de résidence dans les lacs monomictiques

Cited by 7 publications

References 2 publications

Retention time of lakes in the Larsemann Hills oasis, East Antarctica

Retention time of lakes in the Larsemann Hills oasis, East Antarctica

Retention time of lakes in the Larsemann Hills oasis, East Antarctica

On the Use of StorAge Selection Functions to Assess Time‐Variant Travel Times in Lakes

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