open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello,

I'm experimenting with something on my mesh:

I have a couple of layers set at a specific height in a channel. I've now added plains on either side which can become submerged. I only want the mesh layers to be a set height within the channel & are otherwise distributed via classical sigma transformation like the others on the bank (i.e. can collapse onto the mesh during dry periods). Is this possible?

I set my layers like this for the whole mesh:

DO IPLAN=2,4
TRANSF_PLANE%I(IPLAN)=3
DO IPOIN = 1,NPOIN2
ZZ(IPOIN,2)= ZZ(IPOIN,1) + 0.01D0
ZZ(IPOIN,3)= ZZ(IPOIN,1) + 0.02D0
ZZ(IPOIN,4)= ZZ(IPOIN,1) + 0.03D0

ENDDO
ENDDO

I tried to set the layers only in the channel like this:
!NCHANNEl = number of nodes in the channel.
!CHPOIN = channel nodes

DO IPLAN=2,4
TRANSF_PLANE%I(IPLAN)=3
DO CHPOIN = 1,NCHANNEL
ZZ(CHPOIN,2)= ZZ(CHPOIN,1) + 0.01D0
ZZ(CHPOIN,3)= ZZ(CHPOIN,1) + 0.02D0
ZZ(CHPOIN,4)= ZZ(CHPOIN,1) + 0.03D0

ENDDO
ENDDO

but it doesn't work. I think perhaps because I don't appreciate IPOIN - I thought it was the nodes on the mesh?

Is there a way to allow for a mesh layer to be static/fixed in one zone and normal (i.e. classical sigma transformation) in the other?