Surface Water Interaction Modelling Using Visual MODFLOW and GIS

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PHYLARES__________________________________________________________________________________________Table of contentsAcknowledgment ............................................................................................................................ IAbstract .......................................................................................................................................... IITable of contents ......................................................................................................................... IIIList of figures ................................................................................................................................ VList of tables................................................................................................................................. VIChapter 1:Introduction ................................................................................................................ 11.1 General Overview ....................................................................................................... 11.2 Objective ..................................................................................................................... 21.3 Structure of the thesis.................................................................................................. 3Chapter 2:Approach and Methodology ...................................................................................... 42.1 General overview of Models ....................................................................................... 42.2 Groundwater models ................................................................................................... 52.3 Model Development.................................................................................................... 72.3.1 Model Objectives ................................................................................................... 72.3.2 Hydrogeological Characterization ......................................................................... 72.3.3 Model Conceptualization ....................................................................................... 72.3.4 Model Design ......................................................................................................... 72.3.5 Model Calibration .................................................................................................. 82.3.6 Sensitivity Analysis ............................................................................................... 82.3.7 Model Verification ................................................................................................. 82.3.8 Predictive Simulations ........................................................................................... 82.3.9 Performance monitoring Plan ................................................................................ 92.4 Methodology ............................................................................................................... 9Chapter 3:Interaction of groundwater and surface water ...................................................... 103.1 General overview ...................................................................................................... 103.2 Interaction of groundwater and stream ..................................................................... 123.3. Interaction of Groundwater and Lakes ..................................................................... 173.4 Interaction of Groundwater and Wetlands ................................................................ 173.5 Groundwater and Coastal Environments ................................................................. 183.6. Human activity and interaction of groundwater and surface water .......................... 18Chapter 4:Description of the study area ................................................................................... 194.1 Geographical location ............................................................................................... 194.2 Study boundaries and previous work ....................................................................... 204.3 Topography .............................................................................................................. 224.4 Hydrological setting ................................................................................................. 244.5 Recharge .................................................................................................................. 254.6 Land-use and Soil .................................................................................................... 254.7 Climate of the study area ......................................................................................... 25Chapter 5:Modeling tools ........................................................................................................... 275.1 ArcView GIS ............................................................................................................ 275.1.1 Introduction ........................................................................................................... 275.1.2 Types of data used in ArcView GIS ..................................................................... 275.1.3 Geographical data ................................................................................................. 275.1.4 Spatial data ............................................................................................................ 28III______________________________________________________________________________________Groundwater – Surface water interaction modeling using visual MODFLOW and GIS
PHYLARES__________________________________________________________________________________________5.1.5 Image data ............................................................................................................. 285.1.6 Tabular data .......................................................................................................... 285.1.7. Extensions of GIS ................................................................................................. 285.2 Visual MODFLOW .................................................................................................. 295.3. Surfer 8...................................................................................................................... 305.4 Grapher 7 .................................................................................................................. 30Chapter 6:Model Setup .............................................................................................................. 316.1 Description of the Groundwater Flow Model ........................................................... 316.1.1 Model dimensions ................................................................................................ 326.1.2 Layers ................................................................................................................... 336.1.3 Elevation limits .................................................................................................... 346.1.4 Grid ...................................................................................................................... 346.1.5 Elevation data....................................................................................................... 346.1.6 Hydrogeological information ............................................................................... 366.1.7 Aquifer characteristics data.................................................................................. 386.1.8. Hydraulic conductivity......................................................................................... 416.1.9 River ..................................................................................................................... 416.2 Input to the model ..................................................................................................... 426.2.1 Recharge ............................................................................................................... 426.2.2 River ...................................................................................................................... 436.2.3 Constant Head boundary ....................................................................................... 446.3 Output from the model .............................................................................................. 44Chapter 7:Model calibration ..................................................................................................... 467.1 Calibration water levels ........................................................................................... 477.2 Calibrated Aquifer Parameters ................................................................................. 497.2.1 Hydraulic conductivity.......................................................................................... 497.2.2 Water levels .......................................................................................................... 49Chapter 8:Results and discussion .............................................................................................. 528.1 Output from the model .............................................................................................. 528.1.1 Model Water balance ............................................................................................ 528.1.2. Zonebudget ........................................................................................................... 558.3 Groundwater head ..................................................................................................... 568.3 Groundwater - Surface Water Interactions ............................................................... 58Chapter 9:Conclusions and Recommendations ....................................................................... 639.1 Conclusions ............................................................................................................... 639.2. Recommendations and future considerations ........................................................... 64References .................................................................................................................................... 65Annex ........................................................................................................................................... 68IV______________________________________________________________________________________Groundwater – Surface water interaction modeling using visual MODFLOW and GIS
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