Improve shallowwater example
Adopt the shallow water to the new layout of the examples discussed in #811 (closed) and #831 (closed). !1899 (merged) was used as a source of inspiration.
Fixes #853 (closed)
Edited by Martin Utz
Adopt the shallow water to the new layout of the examples discussed in #811 (closed) and #831 (closed). !1899 (merged) was used as a source of inspiration.
Fixes #853 (closed)