The Development of Fully Coupled SWAT-MODFLOW Model (I) Model Development

Kim, Nam-Won; Chung, Il-Moon; Won, Yoo-Seung

doi:10.3741/jkwra.2004.37.6.499

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…Kim et al . () reported that primary calibration parameters for the groundwater model are the aquifer hydraulic conductivity and storativity, whereas Sarwar () reported that adjustment of the heads surrounding the area, recharge rates and drainage depth can be the potential calibration parameters.…”

Section: Resultsmentioning

confidence: 99%

Simulating Groundwater Dynamics Using Feflow‐3D Groundwater Model Under Complex Irrigation and Drainage Network of Dryland Ecosystems of Central Asia

Awan

Tischbein

Martius

2015

Irrigation and Drainage

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Surface and groundwater resources are often conjunctively used to cope with water scarcity in irrigated agriculture. Farmers in the dryland ecosystems of central Asia also utilize shallow groundwater in addition to surface water withdrawn from rivers. This study modelled groundwater dynamics in an irrigation and drainage network in Khorezm region, Uzbekistan. The system, characterized by a vast, unlined channel network used to convey water mainly for flood irrigation and an open drainage system, is typical of Central Asian irrigated areas. Groundwater levels in the region are shallow-this contributes to crop water requirements but threatens crop production through secondary salinization. High losses during irrigation in fields and through the irrigation network are the main causes of these shallow groundwater levels. The main objective of this study was thus to simulate groundwater levels under improved irrigation efficiency scenarios. The FEFLOW-3D model, applied in a case study to the water users' association (WUA) of Shomakhulum in south-west Khorezm, was used to quantify the impact of improved irrigation efficiency scenarios on groundwater dynamics. The modelled scenarios were: current irrigation efficiency (S-A, our baseline), improved conveyance efficiency (S-B), increased field application efficiency (S-C), and improved conveyance and application efficiency (S-D). Recharge rates were separately determined for six hydrological response units (differing in groundwater level and soil type) and introduced into the FEFLOW-3D model. After successful model calibration (R 2 = 0.94) and validation (R 2 = 0.93), the simulations showed that improving irrigation efficiency under existing agro-hydroclimatic conditions would lower groundwater levels from the baseline scenario (S-A) in August (the peak irrigation period) on average by 12 cm in S-B, 38 cm in S-C and 44 cm in S-D. Any interventions which would improve irrigation efficiency will lower the groundwater levels and hence policy makers should consider them and formulate the policy accordingly.

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Section: Resultsmentioning

confidence: 99%

Simulating Groundwater Dynamics Using Feflow‐3D Groundwater Model Under Complex Irrigation and Drainage Network of Dryland Ecosystems of Central Asia

Awan

Tischbein

Martius

2015

Irrigation and Drainage

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“…SWAT was designed to predict the impact of land management practices on water, sediment and agricultural chemical yields in large complex watersheds with varying soils, land use and management conditions over long periods of time. Kim et al (2004aKim et al ( , 2004b reported that the SWAT model might be successfully used to estimate flows from a watershed using databases available in Korea. SWAT has been modified several times, and an ArcView Interface for SWAT (AVSWAT2000) was developed by Di Luzio et al (2002).…”

Section: Swatmentioning

confidence: 99%

“…Water quality models have been widely applied for rivers and lakes in Korea in recent decades (Lee and Seo, 2002;Seo et al, 2004;Seo and Lee, 2005). While hydrological models also have been widely used, most of cases have been used for flow estimation only (Kim et al, 2002(Kim et al, , 2003(Kim et al, , 2004a(Kim et al, , 2004b. Consequently, there have been relatively few attempts to quantify waste load from watershed considering hydrological characteristics in Korea.…”

Section: Introductionmentioning

confidence: 99%

Application of medium class land cover maps to AVSWAT2000 for the prediction of inflow, CBOD, TN and TP for Yongdam Lake, Korea

Seo

Kim

Chang³

2007

Water Science and Technology

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This study tests the efficacy of using medium class land cover maps vs. the large class maps produced by the Korean Ministry of Environment for prediction of flow and CBOD, TN and TP concentrations. AVSWAT2000 was chosen as a model to process information for a sample site, Yongdam Lake watershed area, Korea. The watershed was divided into 11 sub-watersheds, as was done for implementation of the Total Waste Load Management Act by the Korean government. Calibration of AVSWAT2000 was performed using a trial-and-error method, by comparing the root mean square errors of the observed data and calculated results. This study suggests that AVSWAT2000 can be successfully applied in estimating pollutant load considering hydrologic and site-specific conditions of watersheds. With further study, this approach may be applied to improve watershed-scale water quality management strategies, especially for TMDL developments.

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“…Yi (2002) proposed the optimized operation model through the Discrete Differential Dynamic Programming (DDDP) considering aquifer and channel interaction, and it was applied to the Namdaechon watershed in Korea. Kim et al (2004aKim et al ( , 2004b developed fully coupled SWAT−MODFLOW which is the model that MODFLOW is embedded in SWAT, especially HRU−GRID conversion tool using DEM was suggested and this program was applied on Osanchon watershed. Lee and Lee (2007) modified SWMM 4.4H version to SWMM−GE (Storm Water Management Model−Groundwater Enhanced), which has the function to assess groundwater pumping, applied to Hakuicheon watershed in Korea.…”

Section: Introductionmentioning

confidence: 99%

The changes in potential usable water resources by increasing the amount of groundwater use: the case of Gapcheon watershed in Korea

et al. 2010

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The objectives of this study are to analyze the relationship between the long-term stream discharge and the change of groundwater use and to estimate the potential usable water resources due to the change of groundwater use. The watershed model SWMM−GE, which considers the aquifer-stream interaction, is used to calculate the long-term stream discharge of the Gapcheon watershed in Korea according to the increasing groundwater use. In the results, the annual runoff discharge is absolutely affected by the annual rainfall, but the annual baseflow is less affected than the annual runoff discharge. The annual baseflow is decreased by increasing the groundwater use, but the potential usable water resources are increased by increasing the groundwater use. In case groundwater use is doubled, the potential usable water resources are increased by about 44% of pumping case. Excessive groundwater use, however, could dry up some streams or make instream flow insufficient. Thus, those results should be considered to determine suitable amount of ground water use.

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The Development of Fully Coupled SWAT-MODFLOW Model (I) Model Development

Cited by 12 publications

References 3 publications

Simulating Groundwater Dynamics Using Feflow‐3D Groundwater Model Under Complex Irrigation and Drainage Network of Dryland Ecosystems of Central Asia

Simulating Groundwater Dynamics Using Feflow‐3D Groundwater Model Under Complex Irrigation and Drainage Network of Dryland Ecosystems of Central Asia

Application of medium class land cover maps to AVSWAT2000 for the prediction of inflow, CBOD, TN and TP for Yongdam Lake, Korea

The changes in potential usable water resources by increasing the amount of groundwater use: the case of Gapcheon watershed in Korea

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