Description of the Selwyn Aquifer The physical and flow properties of the hydrogeology of the Selwyn aquifer are contained in a data set developed to support Modflow groundwater modeling of the aquifer, compiled by Julian Weir and colleagues at Aqualinc. Go to the dataset you downloaded for this exercise and add the Model_Grid shape file to your map display. Turn off the Wells feature class but leave the SelectWell feature displayed. Now, let’s get a geology map to add to this display. Select Add Data from ArcGIS Online And search for Geological Map of New Zealand You’ll see that a map becomes available produced by the project QMAP of the Crown Research Institute: Geological and Nuclear Sciences (GNS) If you add this map to your display, you’ll see a coloured image of the geology of this region. The purple areas are volcanic rocks of Banks Peninsula (Lyttleton Harbour and Akaroa Harbour are flooded calderas of ancient volcanos). The white areas are regions where river gravel depositions dominate the surface geology – in the case of the Selwyn aquifer, these are the Waimakariri River to the north, the Rakaia River to the south and the Selwyn River in the center of the model grid. A three-dimensional view of the Selwyn groundwater system is shown below. Three-Dimensional Model of the Selwyn Groundwater System Source of Image: Julian Weir, Aqualinc And if you zoom in to Well L36/2175, and use the Identify tool to query the Model_Grid cell in which this well is located, you’ll see parameters I, J, K, which refer to the row, column and layer indices of the Modflow model. In the display shown below, the “Top” elevation of 67.5 meters refers to the ground
Description of the Selwyn Aquifer The physical and flow properties of the hydrogeology of the Selwyn aquifer are contained in a data set developed to support Modflow groundwater modeling of the aquifer, compiled by Julian Weir and colleagues at Aqualinc. Go to the dataset you downloaded for this exercise and add the Model_Grid shape file to your map display. Turn off the Wells feature class but leave the SelectWell feature displayed. Now, let’s get a geology map to add to this display. Select Add Data from ArcGIS Online And search for Geological Map of New Zealand You’ll see that a map becomes available produced by the project QMAP of the Crown Research Institute: Geological and Nuclear Sciences (GNS) If you add this map to your display, you’ll see a coloured image of the geology of this region. The purple areas are volcanic rocks of Banks Peninsula (Lyttleton Harbour and Akaroa Harbour are flooded calderas of ancient volcanos). The white areas are regions where river gravel depositions dominate the surface geology – in the case of the Selwyn aquifer, these are the Waimakariri River to the north, the Rakaia River to the south and the Selwyn River in the center of the model grid. A three-dimensional view of the Selwyn groundwater system is shown below. Three-Dimensional Model of the Selwyn Groundwater System Source of Image: Julian Weir, Aqualinc And if you zoom in to Well L36/2175, and use the Identify tool to query the Model_Grid cell in which this well is located, you’ll see parameters I, J, K, which refer to the row, column and layer indices of the Modflow model. In the display shown below, the “Top” elevation of 67.5 meters refers to the ground
Ex5WATR.docx