An approach to hydrogeological modeling of a large system of groundwater-fed lakes and wetlands in the Nebraska Sand Hills, USA

Rossman, Nathan R.; Zlotnik, Vitaly A.; Rowe, Clinton M.

doi:10.1007/s10040-017-1691-0

Cited by 8 publications

(2 citation statements)

References 54 publications

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“…Many studies about landform distribution analyses [9][10][11][12][13], geomorphology [14] and the human impact on geomorphology [15] were conducted. Furthermore, in the field of hydrology DEMs are required for stream network analysis [16,17] and ground-water flow modelling [18]. Terrain features derived by DEMs are also used as a predictor for digital soil mapping [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

A Relief Dependent Evaluation of Digital Elevation Models on Different Scales for Northern Chile

Kramm

Hoffmeister

2019

IJGI

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Many geoscientific computations are directly influenced by the resolution and accuracy of digital elevation models (DEMs). Therefore, knowledge about the accuracy of DEMs is essential to avoid misleading results. In this study, a comprehensive evaluation of the vertical accuracy of globally available DEMs from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Shuttle Radar Topography Mission (SRTM), Advanced Land Observing Satellite (ALOS) World 3D and TanDEM-X WorldDEM™ was conducted for a large region in Northern Chile. Additionally, several very high-resolution DEM datasets were derived from Satellite Pour l’Observation de la Terre (SPOT) 6/7 and Pléiades stereo satellite imagery for smaller areas. All datasets were evaluated with three reference datasets, namely elevation points from both Ice, Cloud, and land Elevation (ICESat) satellites, as well as very accurate high-resolution elevation data derived by unmanned aerial vehicle (UAV)-based photogrammetry and terrestrial laser scanning (TLS). The accuracy was also evaluated with regard to the existing relief by relating the accuracy results to slope, terrain ruggedness index (TRI) and topographic position index (TPI). For all datasets with global availability, the highest overall accuracies are reached by TanDEM-X WorldDEM™ and the lowest by ASTER Global DEM (GDEM). On the local scale, Pléiades DEMs showed a slightly higher accuracy as SPOT imagery. Generally, accuracy highly depends on topography and the error is rising up to four times for high resolution DEMs and up to eight times for low-resolution DEMs in steeply sloped terrain compared to flat landscapes.

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Section: Introductionmentioning

confidence: 99%

A Relief Dependent Evaluation of Digital Elevation Models on Different Scales for Northern Chile

Kramm

Hoffmeister

2019

IJGI

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“…The Sand Hills is the main recharge zone for the High Plains Aquifer (HPA). Within the UML watershed, the HPA saturated thickness is estimated to be 200-300 m (Rossman et al, 2018) and is characterized by uniform layers of eolian sand and loamy/sandy alluvium (Hobza & Schepers, 2018;Loope & Swinehart, 2000). The hydrostratigraphy of the HPA is described in detail by Korus et al (2010) and Zeyrek et al (2023).…”

Section: Study Site Descriptionmentioning

confidence: 99%

Spatial Variation in Transit Time Distributions of Groundwater Discharge to a Stream Overlying the Northern High Plains Aquifer, Nebraska, USA

Humphrey,

Solomon,

Gilmore

et al. 2024

Water Resources Research

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Groundwater transit time distributions (TTDs) describe the spectrum of flow‐weighted apparent ages of groundwater from aquifer recharge to discharge. Regional‐scale TTDs in stream baseflow are often estimated from numerical models with limited calibration from groundwater sampling and suggest much younger groundwater discharge than has been observed by discrete age‐dating techniques. We investigate both local and regional‐scale groundwater TTDs in the Upper Middle Loup watershed (5,440 km2) overlying the High Plains Aquifer in the Nebraska Sand Hills, USA. We determined flow‐weighted apparent ages of groundwater discharging through the streambed at 88 discrete points along a 99 km groundwater‐dominated stream segment using 3H, noble gases, 14C, and groundwater flux measurements at the point‐scale (<7.6 cm diameter). Points were organized in transects across the stream width (3–10 points per transect) and transects were clustered in five sampling areas (10–610 m in stream length) located at increasing distances along the stream. Groundwater apparent ages ranged from 0 to 8,200 years and the mean groundwater transit time along the 99 km stream is >3,000 years. TTDs from upstream sampling areas were best fit by distributions with a narrow range of apparent ages, but when older groundwater from downstream sampling areas is included, the regional TTD is scale dependent and the distribution is better described by a gamma model (α ≈ 0.4) which accommodates large fractions of millennial‐aged groundwater. Observations indicate: (a) TTDs can exhibit spatial variability within a watershed and (b) watersheds can discharge larger fractions of old groundwater (>1,000 years) than commonly assumed.

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Desenvolvimento de um modelo de fluxo de águas subterrâneas de elementos finitos para testar estratégias de gestão de drenagem para a expansão da mina a céu aberto de Dareh-Zar, Irã

Parsasadr,

Mustafa,

Golian

et al. 2024

Hydrogeol J

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A finite-element groundwater flow model was developed for the expanding Dareh-Zar open pit mine in southern Iran, to simulate groundwater inflow into the excavation and mine wall pore pressure dynamics. The model was used to test the effectiveness of implementing different drainage management strategies to reduce groundwater inflow rates and mine wall pore pressures, including abstraction wells and horizontal drains. Model predictions suggest the implementation of abstraction wells will reduce groundwater inflow rates by 75% during the first 12 years of mining and 50% during the subsequent 5 years relative to a ‘no drainage’ management scenario, with further reductions in groundwater inflow achieved through horizontal drain installation. Furthermore, the installation of horizontal drains was found to be necessary to reduce mine-wall pore pressures from destabilizing the mine walls. Groundwater management of the decommissioned pit mine was also evaluated, with simulation results suggesting that backfilling the excavation would restore the groundwater level within the open pit mine region to ~2,442 m above sea level, representing a net restoration of ~204 m relative to the water table prior to mine closure.

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An approach to hydrogeological modeling of a large system of groundwater-fed lakes and wetlands in the Nebraska Sand Hills, USA

Cited by 8 publications

References 54 publications

A Relief Dependent Evaluation of Digital Elevation Models on Different Scales for Northern Chile

A Relief Dependent Evaluation of Digital Elevation Models on Different Scales for Northern Chile

Spatial Variation in Transit Time Distributions of Groundwater Discharge to a Stream Overlying the Northern High Plains Aquifer, Nebraska, USA

Desenvolvimento de um modelo de fluxo de águas subterrâneas de elementos finitos para testar estratégias de gestão de drenagem para a expansão da mina a céu aberto de Dareh-Zar, Irã

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