Ermittlung der flächendifferenzierten Grundwasserneubildungsrate ...

Summary
Determination of the spatially variable groundwater recharge by using different
methods and a geographic information system (GIS) in Südost-Holstein
The investigation was incorporated in a hydrogeological investigation programme
conducted by the Department of Nature and Environment of the state Schleswig-
Holstein (LANU). The objective of the research was to determine the rate of groundwater
recharge and its spatial variability for an area of 1290 km 2 .
For the reliable calculation of the groundwater recharge different methods were applied.
Only methods were used, which allowed a spatially variable determination of
recharge for a long-term average, as the results of the calculation will be used for
future groundwater management. The choice of methods was determined by the
studies objectives, the initial data sets and their supplement. Following methods
suited under the given climatic and geological conditions:
1. Bagrov/Glugla (in GRUNSKE, 1975)
2. JOSOPAIT & LILLICH (1975)
3. DÖRHÖFER & JOSOPAIT (1980)
4. PROKSCH (1990)
5. RENGER & WESSOLEK (1990)
6. SCHROEDER & WYRWICH (1990)
7. VEKOS (in KLÄMT (1988)
Data sets variable in space and time, like precipitation and evapotranspiration, were
collected for the period of 1961-1990, interpreted and then regionalized by kriging or
the polygon method. Furthermore runoff data were evaluated by using different approaches.
Data variable in space, like geological maps, landuse, morphology were transformed
into digital data sets, evaluated and then imported into the GIS ARC/INFO.
All data sets were prepared, interpreted and analysed in ARC/INFO to build the necessary
database for the calculations, which were performed for the methods mentioned
above. Besides of the analysis, comparison and interpretation of the results, thematic
maps were created using ARC/V IEW.