|
Titel |
Spatially explicit groundwater vulnerability assessment to support the implementation of the Water Framework Directive – a practical approach with stakeholders |
VerfasserIn |
K. Berkhoff |
Medientyp |
Artikel
|
Sprache |
Englisch
|
ISSN |
1027-5606
|
Digitales Dokument |
URL |
Erschienen |
In: Hydrology and Earth System Sciences ; 12, no. 1 ; Nr. 12, no. 1 (2008-01-29), S.111-122 |
Datensatznummer |
250010463
|
Publikation (Nr.) |
copernicus.org/hess-12-111-2008.pdf |
|
|
|
Zusammenfassung |
The main objective of the study presented in this paper was to develop an
evaluation scheme which is suitable for spatially explicit groundwater
vulnerability assessment according to the Water Framework Directive (WFD).
Study area was the Hase river catchment, an area of about 3 000 km2 in
north-west Germany which is dominated by livestock farming, in particular
pig and poultry production. For the Hase river catchment, the first
inventory of the WFD led to the conclusion that 98% of the catchment
area is "unclear/unlikely" to reach a good groundwater status due to
diffuse nitrogen emissions from agriculture.
The groundwater vulnerability assessment was embedded in the PartizipA
project ("Participative modelling, Actor and Ecosystem Analysis in Regions
with Intensive Agriculture", www.partizipa.net), within which a so-called
actors' platform was established in the study area. The objective of the
participatory process was to investigate the effects of the WFD on
agriculture as well as to discuss groundwater protection measures which are
suitable for an integration in the programme of measures.
The study was conducted according to the vulnerability assessment concept of
the Intergovernmental Panel on Climate Change, considering sensitivity,
exposure and adaptive capacity. Sensitivity was computed using the DRASTIC
index of natural groundwater pollution potential. Exposure (for a reference
scenario) was computed using the STOFFBILANZ nutrient model. Several
regional studies were analysed to evaluate the adaptive capacity. From these
studies it was concluded that the adaptive capacity in the Hase river
catchment is very low due to the economic importance of the agricultural
sector which will be significantly affected by groundwater protection
measures. As a consequence, the adaptive capacity was not considered any
more in the vulnerability assessment.
A groundwater vulnerability evaluation scheme is presented which enjoys the
advantage that both exposure and sensitivity can be operationalized in a
spatially resolved manner (500×500 m grid) by the two models mentioned
above. The evaluation scheme was applied in the Hase river catchment.
21% of the catchment was classified as highly vulnerable, another
73% as medium vulnerable. Only 6% of the Hase river catchment has
low vulnerability. Grid cells of the high vulnerability class are considered
as priority areas for groundwater protection measures in the programme of
measures of the WFD. Measures will be particularly effective in the
north-eastern part of the catchment where groundwater vulnerability is
mainly due to high nitrogen emissions. |
|
|
Teil von |
|
|
|
|
|
|