Parwati, A mound will form by injecting water into an aquifer, either by recharge, a well, or related. "Recharge" and "discharge" are from the perspective of the entire aquifer. True, water will flow from a mound to adjacent regions in the aquifer, but that is not the basis for recharge and discharge because the water is staying within the aquifer. Only water crossing the boundary of the aquifer would be considered recharge or discharge. Larry
Dylan, There is a graphical approach to interpolate between groups of points using the "3-pt problem" method. I have some videos describing this procedure. However, usually when you are contouring many points like this you would not take the time to interpolate using the 3 pt problem technique. There is often enough uncertainty in the locations of the contours so estimating the location is sufficient. You can automate the contour process using software like Surfer, or other interpolation software. When you do this, you will find that there are many mathematical methods for interpolating and determining the locations of contours, and they all give somewhat different results. You cannot really say which one is right. This is particularly true when the data are sparse, as is often the case for geological problems. Contours done carefully by hand are often just as reasonable as the ones calculated with an algorithm. Larry
Hi Naviita, Head contours will cross streams because the elevation of the stream changes along the length of the stream (unlike lakes, which are at the same elevation). Head contours that cross a gaining stream will have a "V" shape that points in the upstream direction. Larry
