On the Capacity and Depth of Compact Surfaces
  K. Borsuk in 1979, in the Topological Conference in Moscow, introduced the concept of capacity and depth of a compactum. In this paper, we compute the capacity and depth of compact surfaces. We show that the capacity and depth of every compact orientable surface of genus $g\geq 0$ is equal to $g+2$. Also, we prove that the capacity and depth of a compact non-orientable surface of genus $g>0$ is $[\frac{g}{2}]+2$. 
Mahboubeh Abbasi and Behrooz Mashayekhy
math.AT