Mapping Recharge Areas Using a Ground‐Water Flow Model – A Case Study

Stoertz, Mary W.; Bradbury, Kenneth R.

doi:10.1111/j.1745-6584.1989.tb00443.x

Cited by 61 publications

(52 citation statements)

References 9 publications

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“…Inverse groundwater flow modelling is a variation on the water-balance method used specifically for estimating recharge (Stoertz and Bradbury, 1989). Inverse modelling has the advantages of requiring no information about the unsaturated zone and no assumptions regarding the mechanism of water movement through it.…”

Section: Introductionmentioning

confidence: 99%

A soil‐water‐balance approach to quantify groundwater recharge from irrigated cropland in the North China Plain

Kendy¹,

Gerard-Marchant²,

Walter³

et al. 2003

Hydrological Processes

236

201

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Abstract:Rapidly depleting unconfined aquifers are the primary source of water for irrigation on the North China Plain. Yet, despite its critical importance, groundwater recharge to the Plain remains an enigma. We introduce a one-dimensional soil-water-balance model to estimate precipitation-and irrigation-generated areal recharge from commonly available crop and soil characteristics and climate data. To limit input data needs and to simplify calculations, the model assumes that water flows vertically downward under a unit gradient; infiltration and evapotranspiration are separate, sequential processes; evapotranspiration is allocated to evaporation and transpiration as a function of leaf-area index and is limited by soil-moisture content; and evaporation and transpiration are distributed through the soil profile as exponential functions of soil and root depth, respectively. For calibration, model-calculated water contents of 11 soildepth intervals from 0 to 200 cm were compared with measured water contents of loam soil at four sites in Luancheng County, Hebei Province, over 3 years (1998)(1999)(2000)(2001). Each 50-m 2 site was identically cropped with winter wheat and summer maize, but received a different irrigation treatment. Average root mean-squared error between measured and model-calculated water content of the top 180 cm was 4Ð2 cm, or 9Ð3% of average total water content. In addition, model-calculated evapotranspiration compared well with that measured by a large-scale lysimeter. To test the model, 12 additional sites were simulated successfully. Model results demonstrate that drainage from the soil profile is not a constant fraction of precipitation and irrigation inputs, but rather the fraction increases as the inputs increase. Because this drainage recharges the underlying aquifer, improving irrigation efficiency by reducing seepage will not reverse water-table declines.

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Section: Introductionmentioning

confidence: 99%

A soil‐water‐balance approach to quantify groundwater recharge from irrigated cropland in the North China Plain

Kendy¹,

Gerard-Marchant²,

Walter³

et al. 2003

Hydrological Processes

236

201

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Section: Finite Difference Groundwater Modelsmentioning

confidence: 99%

“…The use ofthe finite difference model was recommended in this study, which can be run with relatively few idealizing assumptions and can easily be calibrated to produce more accurate return flow values than the other me1hods. Stoertz and Bradbury (1989) used MODFLOW to map regional recharge areas.The data requirements for the USGS Modular Three-Dimensional Finite-Difference Groundwater Flow Model MODFLOW are shown in Table 4.1, along with indications as to which input data types can be prepared wi1h the aid ofgeographic infonnation systems (GIS). Application of GIS to preparation ofinput data files for MODFLOW is detailed in the following chapter.…”

mentioning

confidence: 99%

Decision Support System for Conjunctive Stream-Aquifer Management

Fredericks¹,

Labadie²,

Altenhofen³

1998

J. Water Resour. Plann. Manage.

128

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PREFACEAlthough much progress has been made in the development ofregional grOlmdwater models and river basin simulation models, previous attempts at linking these two types of models into a workable conjunctive use decision support system for use in comprehensive river basin planning, management, and administration, have not been successful. With recent advances in computer hardware and software technology such as geographic information systems (GIS) and data base management system technology (DBMS), it is now possible to develop a computer based river basin decision support system for improved conjunctive use management ofgroundwater and surface water by linking a finite difference groundwater flow model with a river basin network model.A microcomputer based decision support system is presented for conjunctive stream-aquifer management mder prior appropriation This has been accomplished through a synthesis of existing technology ratherthan development ofnew models. The computer-aided design and drafting package, AUTOCAD, and a powerful, low-cost, raster GIS package for PC's called IDRISI, are used for preparing and processing grid-based spatial data. These data are processed for input into MODRSP, amodified version of1he USGS three-dimensional finite difference groundwater model, MODFLOW, to generate numerical groundwater response coefficients for considering distributive aquifer characteristics and realistic aquifer boundary conditions. These response coefficients are provided as input to the generalized river basin network mode~MODSIM, to simulate spatially varied and timelagged return/depletion flows from stream-aquifer interaction. The integration of GIS, DBMS, MODFLOW, and MODSIM allows analysis ofconjunctive use plans capable ofconsidering decreed flow and storage rights, river calls, exchanges, trades, and plans for augmentation. The groundwater hydrologic components provided with MODSIM include reservoir seepage, irrigation infiltration, well pumping, channel loss, channel routing, return flows, river depletion due to pumping, and aquifer storage.To demonstrate the capabilities ofthe Stream Aquifer Management Decision Support System (SAMDSS), a case study is presented for a portion ofthe Lower South Platte River Basin, Colorado. A 370 by 140 groundwater grid network (l000 ft x 1000 ft cell) was prepared for the case study area using GIS techniques. Groundwater response coefficients were generated using MODRSP for the 200 wells and over 30 recharge sites ofthe Bijou Irrigation Company groundwater augmentation plan. The water right return/depletion flow account for the Bijou augmentation plan was simulated using MODSIM. A separate MODSIM network was set up for a 70 mile section ofthe Lower South Platte River, Colorado, between the Kersey and Balzac river gage stations, under administrative control of State Engineer's Water District #1, to simulate daily administration of a river regulated under prior appropriation water right laws. The river system network model, which included 11 existing or proposed res...

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“…There has been extensive research on recharge estimation at a variety of scales [2][3][4], including studies that assess spatial and temporal recharge variability [5][6][7][8][9][10][11][12][13][14][15][16]. Nevertheless, groundwater modelers, planners, and policy makers frequently use a single recharge value for an entire watershed calculated as an assumed fraction of the annual average precipitation or as determined by model calibration.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Field Assessment of Groundwater Recharge

W.R.¹

2012

TOHYDJ

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Groundwater recharge is often assumed to be uniform within a watershed owing to difficulties in quantifying its temporal and spatial variability. In this paper, fluctuations in soil moisture content at multiple depths in the unsaturated zone together with fluctuations in the water table are used to provide a record of the recharge process and a means to quantify and compare temporal and spatial recharge variability. Hourly measurements of soil moisture content and the elevation of the water table were collected at two sites, a clear cut and a coniferous forest site, within the Trout Lake basin of northern Wisconsin. The soil moisture and water table data were used together to assess the temporal and spatial variability in groundwater recharge from October 1999 to May 2001 and to identify the climatic (amount and timing of rainfall) and physical (vegetation and soil type) controls on the recharge process within this basin. Together, the two datasets allow for a holistic assessment of the recharge process from the ground surface through the unsaturated zone down to the water table.

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Mapping Recharge Areas Using a Ground‐Water Flow Model – A Case Study

Cited by 61 publications

References 9 publications

A soil‐water‐balance approach to quantify groundwater recharge from irrigated cropland in the North China Plain

A soil‐water‐balance approach to quantify groundwater recharge from irrigated cropland in the North China Plain

Decision Support System for Conjunctive Stream-Aquifer Management

An Integrated Field Assessment of Groundwater Recharge

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