Jump to content
RockWare Support Forum

Quicksurf Unstable


Recommended Posts

I'm using Quicksurf for ACAD 2011 to map a complex water table located next to a river and am having problems with Quicksurf reporting "unstable" and stopping during grid processing. The area I'm mapping contains a variety of elevation points, including randomly scattered well elevation data, an interceptor trench with a central pumping well and a elevation data from a group of pumping wells adjacent to the trench. I'm trying to model the trench with a three-dimensional array of points that are configured to approximate a drawdown cone within the trench, based on elevations at one end and in the middle. The array is currently set up as a 2'x2' grid extending over a 4'x268' area. The river margin is represented by a series of polylines extracted from a photogrammetric topographic map, which contains all topographic elements in 3D. The drawing doesn't contain any extraneous extreme high or low elevation points.

I'd like to model the area with a very tight (2'x2') grid, if I can, with exponential kriging, so I'll get nice, smooth contours and honor all the trench and pumping well data.

Any suggestions on getting this model to work other than coarsening up the grid to 4'x4' or greater?

I'm attaching a zip file containing the DWG with the points, a configuration file that represents what I'd like to use, and a surface file with a successful model at 4'x4' and the point data.


Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...