Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have DEM with resolution 20m and also stream network map in shape format, isohyetal map in shape format. I have also historic numerical data for rainfall, runoff and temperature from 1970-2000 for just one gauging station in the area 10x14 km = 140 sqm.

Can anybody give me idea how can I calculate the stream flow amount(Q) for entire area and especially along the main stream, using ArcGIS 9.2?

share|improve this question

Give this script a try:

If I recall correctly, you select stream segments, run this macro (tie the macro to a button on a custom toolbar) and it calculates the flow accumulation for the selected segments. I remember that we had to make a few tweaks to get it to work with our data.

share|improve this answer

You probably are talking about hydrologic problem, and you need ArcHydro for that, I believe (or something similar if they exists). There is a link to file for version ArcGIS 9.2 in, and it includes documentations and tutorials in pdf.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.