Examine the arrows along the segment of the 2030-foot contour line between the 40¡ 44' 30" and 40¡ 46' 00" latitude lines. Some of the precipitation that falls onto the land infiltrates into the ground to become groundwater. The Aquifer Potential Map is a preliminary map (version 1.0). King County Solid Waste Division (KCSWD) personnel measured groundwater elevations at the landfill on October 1, 2012. Groundwater flow The direction of groundwater flow follows a curved path through an aquifer from areas of high water levels to areas where water levels are low; that is from below high ground, which are recharge areas, to groundwater discharge points in valleys or the sea. Maps & Groundwater Velocity Calculations (KCWLRD, 2011). If the water meets the water table (below which the soil is saturated), it can move both vertically and horizontally. The map includes: Groundwater depth below ground surface; Groundwater elevation; Groundwater change in elevation from year to year; Subsidence trends as measured by extensometers and at GPS stations; Cumulative subsidence at GPS stations; Changes in groundwater levels from long-term monitoring wells; Estimated potential for future subsidence in each groundwater basin ; Other layers … This work was carried out as part of the GNS Science Groundwater Resources of New Zealand research programme, and future plans within this research programme include the refinement and update of this map. For example, because differences in water- level elevation provide potential for flow, spatial mapping of water-level elevations can permit identification of regional groundwater flow direction. Hi, I want to create a map showing groundwater flow paths using a combination of surface topographical data and hydraulic head. The groundwater flow direction in this region, as shown by your arrows, was generally toward the [(northwest) (southwest) (northeast) (southeast)]. My study site is approx. (I also have vertical hydraulic gradient data, if that's useful.) In general, the potentiometric surface for a water table map follows the overlying land-surface topography and intersects the land surface at major streams, lakes, or wetlands. Determine the groundwater flow direction … The direction of flow is indicated by the slope of the water table which is called the hydraulic gradient. 30-m x 30-m. Evaluate the potentiometric groundwater surface elevation for the regional aquifer; 2. I have many land elevation survey points and 8 … Analyze the groundwater flow pattern on the map by drawing an arrow about every 1.5 cm along each contour line. These measurements were received by KCWLRD on December 11, 2012 and were used to: 1. 8.

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