Hi I've just discovered your video tutorial on GMS and I am very glad I found it. I would like to ask, what would happened if a river system is inside your polygon/boundary map?
Thanks a million for this material in groundwater modeling, my question is in arid zone such as Saudi Arabia we don't have rivers also no surface water in the study area, so we don't need general head and all boundary polygon well be no flow and single arc, is that correct?
Yes, that is probably the case. But you need to be careful when selecting the locations of your boundaries. They need to correspond to be some sort of no-flow condition such as: a) physical outcropping (bedrock for example), b) low-permeability fault, c) groundwater divide, d) parallel flow conditions, etc.
Ok, sorry for this question I am still a beginner in GMS, how we can model groundwater head or water elevation if we don't have base elevation such as river? can you explain in more detail please
@@ibrahimalzahrani1854 Boundary conditions have to be carefully analyzed. You need to consider physical barriers (bedrock outcroppings, low permeability faults, etc.) or hydraulic boundaries such as groundwater divides and parallel flow boundaries. Head-based sources and sinks such as rivers, lakes, springs, etc generally make your model more stable, but technically are not necessary to simulate a transient groundwater flow system. If you send me an email (njones@byu.edu) I can send you some notes that explain in more detail.
Hi I've just discovered your video tutorial on GMS and I am very glad I found it. I would like to ask, what would happened if a river system is inside your polygon/boundary map?
Thanks a million for this material in groundwater modeling, my question is in arid zone such as Saudi Arabia we don't have rivers also no surface water in the study area, so we don't need general head and all boundary polygon well be no flow and single arc, is that correct?
Yes, that is probably the case. But you need to be careful when selecting the locations of your boundaries. They need to correspond to be some sort of no-flow condition such as: a) physical outcropping (bedrock for example), b) low-permeability fault, c) groundwater divide, d) parallel flow conditions, etc.
@@normjones 👍🙏
Ok, sorry for this question I am still a beginner in GMS, how we can model groundwater head or water elevation if we don't have base elevation such as river? can you explain in more detail please
@@ibrahimalzahrani1854 Boundary conditions have to be carefully analyzed. You need to consider physical barriers (bedrock outcroppings, low permeability faults, etc.) or hydraulic boundaries such as groundwater divides and parallel flow boundaries. Head-based sources and sinks such as rivers, lakes, springs, etc generally make your model more stable, but technically are not necessary to simulate a transient groundwater flow system.
If you send me an email (njones@byu.edu) I can send you some notes that explain in more detail.