814.201WPOFederal Council OrdinanceJan 1, 1999Original source
In biotopes of a national importance, in cantonal nature conservation areas, in mire landscapes of exceptional beauty and national importance, in water bird and migratory bird reserves of international or national importance and, in the case of waters-related protection targets, in landscapes of national importance and cantonal landscape conservation areas the width of the space provided for waters must amount to at least:
for watercourses with a channel bed of less than 1 m natural width: 11 m;
for watercourses with a channel bed of 1–5 m natural width: 6 times the width of the channel bed plus 5 m;
for watercourses with a channel bed of more than 5 m natural width: the width of the channel bed plus 30 m.
In other areas, the width of the space provided for waters must amount to at least:
for watercourses with a channel bed of less than 2 m natural width: 11 m;
for watercourses with a channel bed of 2–15 m natural width: 2.5 times the width of the channel bed plus 7 m.
The width of the space provided for waters calculated in accordance with paragraphs 1 and 2 must be increased where this is required to guarantee:
protection against flooding;
the space required for rehabilitation;
the protection targets for watercourses under paragraph 1 and other overriding interests of nature and landscape conservation;
a use of the waters.
Provided protection against flooding is guaranteed, the width of the space provided for waters may be adapted:
to the structural conditions in densely built-up areas;
to the topographic conditions on stretches of waters:
1. in which the waters largely fill the valley floor, and
2. that have slopes on both sides that are too steep to permit farming activities.1
In the absence of any overriding interests to the contrary, determining the space provided for waters may be dispensed with if the waters:
are located in forest or in areas, that are not designed mountain- or valley areas in accordance with the agriculture legislation in the arable land register;