The aim of the R+D project "Methodological standards for nature and environment-related assessments for federal sectoral planning" (FKZ 3518 86 0600) is to develop technical methodological proposals based on the existing principles and taking into account the experience gained from the current federal sectoral planning procedures.
Overhead line projects and underground cable projects have significantly different impact factors and impact intensities, which is reflected in the selection and assessment of the area categories, sensitivities and spatial resistances or conflict potentials. Bundling and replacement construction play a far greater role in overhead line projects than in underground cable projects. Underground cable projects, on the other hand, are generally new construction projects and bundling usually only plays a subordinate role.
In this respect, the focus for overhead lines was on how the effects and impacts of a new replacement line are to be assessed in comparison to a new overhead line. This is also accompanied by a certain "softening" of the corridor approach, as a new replacement line is intended to be more spatially focussed on a potential route axis. As a result, the entirety of the effects associated with an overhead line, i.e. also the impact factors extending beyond the immediate line area, are of greater importance here, which is why these were initially considered in their entirety in order to derive the impact relationships and potential conflicts relevant for decision-making at the planning level.
In the case of underground cables, the corridor assessment was based on the assumption that the cable can be laid at any point along the corridor (in open construction). Accordingly, the assessment of spatial resistances and conflict potentials was based in particular on the impact factors with the highest impact intensity in the area of the cable trench that were relevant for decision-making and did not pursue the approach of fully mapping all possible conflicts. In selected cases, impacts that may extend beyond the corridor are mapped using so-called complex impact zones.
Methodenstandards für natur- und umweltbezogene Prüfungen zur Bundesfachplanung. Standardisierungsvorschläge für die Bundesfachplanung in Bezug auf Erdkabel. Holger Runge, Jan-Christoph Sicard, Dagmar Egge. BfN-Schriften 688, Bonn 2024 (includes English summary)
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Methodenstandards für natur- und umweltbezogene Prüfungen zur Bundesfachplanung. Standardisierungsvorschläge für die Bundesfachplanung in Bezug auf Freileitungen. Elke Weingarten, Wolfgang Peters, Stefanie Beithan, Miron Thylmann, Elisabeth Platzer. BfN-Schriften 689, Bonn 2024 (includes English summary)
