# Check 12 - Check of Anaqsim drain line boundary

##### **<span class="C-6">Checks drain line boundary, interdomain boundary</span>**

<span class="C-2">This compares two models with uniform recharge within a circular constant head boundary. The two models are identical, but one has a drain constructed with a line drain element and in the other, the drain is represented as a separate domain with finite width and the same equivalent conductivity as the line drain. </span>

<span class="C-2">The plots below are plots of heads near the drain in the two models and show nearly identical patterns.</span>

[![image.png](https://docs.anaqsim.com/uploads/images/gallery/2024-01/scaled-1680-/LdYimage.png)](https://docs.anaqsim.com/uploads/images/gallery/2024-01/LdYimage.png)

[![image.png](https://docs.anaqsim.com/uploads/images/gallery/2024-01/scaled-1680-/283image.png)](https://docs.anaqsim.com/uploads/images/gallery/2024-01/283image.png)

[DrainCheck1.anaq](https://docs.anaqsim.com/attachments/29)

[DrainCheck2.anaq](https://docs.anaqsim.com/attachments/31)