Using stable isotopes of water to infer wetland hydrological dynamics

Clay, Andrew; Bradley, Chris; Gerrard, A. J.; Leng, Melanie J.

doi:10.5194/hess-8-1164-2004

Cited by 35 publications

(18 citation statements)

References 14 publications

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“…3). Studies of the stable isotope composition (Clay et al, 2004) and borehole pumping tests (Allen et al, 1997) have indicated that the River Tern derives much of its flow from groundwater. The nearest flow gauging station is approximately 2.5 km upstream of the study reach (at Ternhill, national grid reference SJ 629 316), operated by the Environment Agency.…”

Section: Description Of Field Site and Installationmentioning

confidence: 98%

Temporal and spatial variability of groundwater–surface water fluxes: Development and application of an analytical method using temperature time series

Keery

Binley

Crook

et al. 2007

Journal of Hydrology

500

487

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Section: Description Of Field Site and Installationmentioning

confidence: 98%

Temporal and spatial variability of groundwater–surface water fluxes: Development and application of an analytical method using temperature time series

Keery

Binley

Crook

et al. 2007

Journal of Hydrology

500

487

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“…The sampling is relatively easy and, therefore, suitable for remote areas. However, few studies have been undertaken to use stable water isotopes for the investigation of hydrological processes in wetlands (Clay et al 2004).…”

mentioning

confidence: 99%

Estimating water balance components of tropical wetland lakes in the Pantanal dry season, Brazil

Schwerdtfeger

Weiler

Johnson

et al. 2014

Hydrological Sciences Journal

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Water balance studies with stable water isotopes have rarely been conducted in remote and tropical wetland areas. As such, little is known regarding the water balance and groundwater-surface water interaction in the Pantanal, one of the largest and most pristine wetlands in the world. We applied MINA TrêS, a water balance model utilizing stable water isotopes (δ 18 O, δ 2 H) and chloride (Cl -) to assess the dry-season hydrological processes controlling groundwater-surface water interactions and the water balance of six floodplain lakes in the northern Pantanal, Brazil. Qualitatively, all lakes exhibited similarity in hydrological controls. Quantitatively, they differed significantly due to morphological differences in controlling groundwater inflow and lake volume. Our approach is readily transferable to other remote and tropical wetland systems with minimal data input requirements, which is useful in regions with sparse hydrometric monitoring.Key words Pantanal; dry season; stable water isotopes; chloride; water balance; groundwater-surface water interactions Estimation des composantes du bilan hydrique en saison sèche des lacs des zones humides tropicales du Pantanal (Brésil) Résumé Les études sur le bilan hydrique utilisant des isotopes stables de l'eau ont rarement été menées dans les zones humides et tropicales reculées. En tant que tel, on connaît peu le bilan hydrique et les interactions entre eaux superficielles et souterraines dans le Pantanal, une des zones humides les plus importantes et les plus vierges du monde. Nous avons appliqué le modèle de bilan hydrique MINA Três, en utilisant des isotopes stables de l'eau (δ 18 O, δ 2 H) et les chlorures (Cl -), afin d'évaluer, en saison sèche, les processus hydrologiques contrôlant les interactions des eaux souterraines et superficielles et le bilan hydrologique de six lacs de la plaine d'inondation dans le Nord du Pantanal, au Brésil. Qualitativement, les contrôles hydrologiques de tous les lacs sont similaires. Quantitativement, ils diffèrent sensiblement en raison des différences morphologiques du contrôle de l'écoulement souterrain et du volume des lacs. Notre approche, qui ne demande que très peu de données, est facilement transférable à d'autres systèmes de zones humides tropicales reculées, ce qui est utile dans les régions où le suivi hydrométrique est rare.

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“…Variation in stable isotope composition can classify patterns of groundwater recharge and flow and have been used to estimate groundwater residence time (Soulsby et al, 2000). Isotopes have also been used to investigate the seasonal dynamics in wetland water storage (Clay et al, 2004). However, comparatively few studies have used isotope to determine groundwater sources of inland wetland, to discriminate sources of groundwater recharge and to understand mixing and contamination processes of groundwater.…”

Section: Introductionmentioning

confidence: 99%

Understanding wetland sub-surface hydrology using geologic and isotopic signatures

Sikdar

Sahu

2009

Hydrol. Earth Syst. Sci.

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Abstract. This paper attempts to utilize hydrogeology and isotope composition of groundwater to understand the present hydrological processes prevalent in a freshwater wetland, source of wetland groundwater, surface water/groundwater interaction and mixing of groundwater of various depth zones in the aquifer. This study considers East Calcutta Wetlands (ECW) -a freshwater peri-urban inland wetland ecosystem located at the lower part of the deltaic alluvial plain of South Bengal Basin and east of Kolkata city. This wetland is well known over the world for its resource recovery systems, developed by local people through ages, using wastewater of the city. Geological investigations reveal that the sub-surface geology is completely blanketed by the Quaternary sediments comprising a succession of silty clay, sand of various grades and sand mixed with occasional gravels and thin intercalations of silty clay. At few places the top silty clay layer is absent due to scouring action of past channels. In these areas sand is present throughout the geological column and the areas are vulnerable to groundwater pollution. Groundwater mainly flows from east to west and is being over-extracted to the tune of 65×10 3 m 3 /day. δ 18 O and δD values of shallow and deep groundwater are similar indicating resemblance in hydrostratigraphy and climate of the recharge areas. Groundwater originates mainly from monsoonal rain with some evaporation prior to or during infiltration and partly from bottom of ponds, canals and infiltration of groundwater withdrawn for irrigation. Relatively high tritium content of the shallow groundwater indicates local recharge, while the deep groundwater with very low tritium is recharged mainly from distant areas. At places the deep aquifer has relatively high tritium, indicating mix-ing of groundwater of shallow and deep aquifers. Metals such as copper, lead, arsenic, cadmium, aluminium, nickel and chromium are also present in groundwater of various depths. Therefore, aquifers of wetland and surrounding urban areas which are heavily dependent on groundwater are vulnerable to pollution. In the area south of ECW isotope data indicates no interaction between shallow and deep aquifer and hence this area may be a better location to treat sewage water than within ECW. To reduce the threat of pollution in ECW's aquifer, surface water-groundwater interaction should be minimized by regulating tubewell operation time, introducing treated surface water supply system and artificial recharging of the aquifer.

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Using stable isotopes of water to infer wetland hydrological dynamics

Cited by 35 publications

References 14 publications

Temporal and spatial variability of groundwater–surface water fluxes: Development and application of an analytical method using temperature time series

Temporal and spatial variability of groundwater–surface water fluxes: Development and application of an analytical method using temperature time series

Estimating water balance components of tropical wetland lakes in the Pantanal dry season, Brazil

Understanding wetland sub-surface hydrology using geologic and isotopic signatures

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