Groundwater Levels of the Main Aquifer and Panke Valley Aquifer 2015

Map Description

The present groundwater contour map describes the groundwater situation of the Main Aquifer with violet groundwater isolines and the Panke Valley Aquifer in north-eastern Berlin with blue isolines. The interval between the groundwater isolines is 0.5 m. These show the piezometric surface area of the unconfined and confined groundwater, respectively (see also Fig. 3). In areas of the Main Aquifer with confined groundwater, the groundwater contours are displayed in broken lines. In areas with no main groundwater aquifer, or with an isolated main groundwater aquifer of low thickness, no groundwater isolines are displayed. Those areas are shown with black dots.

The map is based on the topographical General Map of Berlin, scale of 1:50,000, in grid format, and the geological outline for the Berlin state territory, at a scale of 1:50,000 (2007), which was derived from the geological General Map of Berlin and Surrounding Areas, scale of 1:100,000. In addition, the appropriate support points (groundwater measurement points and surface-water levels) as well as the individual waterworks are indicated, with their active wells and water conservation areas.

Differing regulations exist in the Johannisthal water conservation area established on January 18, 2013. The respective areas are shown on the map Water Conservation District Johannisthal (Preliminary Order).

Hydrogeological Situation

On the plateaus, the main aquifer is extensively covered by the glacial till and bolder clay (aquitards) of the ground moraines. Wherever the piezometric surface of the main aquifer lies within such an aquitard, groundwater conditions are confined. In sandy segments above the till or in islands, near-surface groundwater may be formed, which is also called stratum water (see also Fig. 3). After extreme precipitation, it may rise to the surface. The groundwater levels of these locally highly differentiated areas have not been separately ascertained and portrayed.In the Panke Valley, on the northern side of the spillway, the Barnim Plateau, a major independent coherent aquifer has developed. It is located above the main aquifer, which is covered by the glacial till of the ground moraine (see also Figs. 7 & 8). On the present map, this aquifer is indicated by separate blue groundwater isolines. A spur of the glacial till toward the Warsaw-Berlin Glacial Spillway creates an interlock of the Panke Valley Aquifer with the Main Aquifer there.

For more information, see the Groundwater Brochure:

www.berlin.de/sen/uvk/_assets/umwelt/wasser-und-geologie/publikationen-und-merkblaetter/grundwasser-broschuere.pdf (only in German)

Current Situation in May 2015

As a rule, the groundwater incline in Berlin, and hence, too, the flow direction, is from the Barnim and Teltow Plateaus and the Nauen Plate toward the receiving bodies, the Spree and Havel Rivers. Depression cones have formed around the wells at those waterworks in operation during the measurement period, and have sunk the phreatic surface below the level of the neighbouring surface waters. Thus, in addition to inflowing groundwater from the shore side, the water pumped here also includes groundwater formed by infiltration (bank-filtered water) from these surface waters (see also Fig. 4c).

In May 2015, too, the potentiometric surface, which has been lowered in Berlin by drinking-water discharge over the past hundred years, was at a relatively high level compared to 1989 (Limberg et al. 2007: pp. 76 ff.). Areas of groundwater rise for this period of time in the glacial spillway of more than half a meter and of more than one meter are shown on the map (Fig. 10).

Fig. 10: Groundwater Rise in the Glacial Spillway between 1989 and 2012

The reduced raw-water discharge by the Berlin Water Utility since 1989 as a result of the decreased need for drinking and industrial water is responsible for the constant rise of the groundwater level. Moreover, five of the smaller Berlin waterworks (Altglienicke, Friedrichsfelde, Köpenick, Riemeisterfenn and Buch) were shut down altogether between 1991 and 1997. In addition, drinking water production at the two waterworks Johannisthal and Jungfernheide has been discontinued temporarily since September 2001; at the latter, the same has been true for artificial groundwater recharging. However, under the immediate water management measures of the Senate Department for Urban Development and the Environment, groundwater is still being discharged at the Johannisthal location, so as not to endanger current local waste disposal and construction measures. Likewise at the Jungfernheide location, groundwater was discharged by the Department through the end of 2005. Since January 2006, a private company has performed the groundwater management here.

The Water Conservation Districts of the Buch, Jungfernheide and Altglienicke waterworks were abolished in April 2009.

The overall discharge of raw water by the Berlin Water Utility for public water supply dropped by almost half (47%) in Berlin over a period of 26 years. In 1989, 378 million cu.m. were discharged, as opposed to 219 million cu.m. in 2002. In 2003, the discharge briefly increased slightly to 226 million cu.m. due to the extremely dry summer, but then dropped again by 2014, reaching 207 million cu.m. (Fig. 11).

Fig. 11: Drop in the raw-water discharge by the Berlin Water Utility over a 26-year period

The development of the groundwater levels from May 2014 through May 2015 is exemplified at four measurement points which are largely unaffected by the withdrawal of water by the waterworks (Fig. 12).

Fig. 12: Four exemplary measurement points: 340 and 5139 in the Glacial Spillway, 777 on the Teltow Plateau, and 5004 on the Barnim Plateau

The groundwater levels at two measurement points in the unconfined aquifer of the Glacial Spillway were a few centimetres lower in May 2015 than they had been the previous year. The nearly natural annual variation with low groundwater levels in autumn can be observed here, while the highest ones occurred not in May but already in January and February. This is due to the particularly dry months February, April and May (Fig. 13 and 15).

Fig. 13: Hydrographic curves of groundwater levels at two measurement stations in the Glacial Spillway, May 15, 2014 to May 15, 2015

On the Teltow Plateau and on the Barnim Plateau, the groundwater level at the measurement points in the covered, confined aquifer dropped by 34 cm (Measurement Point 777) and by 12 cm (Measurement Point 5004), during the same period (Fig. 14). Here the annual variation with the natural fluctuations is not as pronounced. However, the effects of the large quantities of precipitation in January and March are clearly discernible from the measurement point’s hydrograph.

Fig. 14: Hydrographic curves of groundwater levels at two exemplary measurement points on the plateaus, May 15, 2014 to May 15, 2015

From June 2014 through May 2015, the precipitation at the Berlin-Tempelhof Measurement Point was 152 mm below the long-term mean (1960 to 1990). As the months November 2014 through February 2015, which are essential for groundwater formation, were extremely low in precipitation (Fig. 15), the groundwater levels dropped significantly after low precipitation in the spring of 2015 (Fig. 13 and 14).

Fig. 15: Monthly precipitation between May 2014 and May 2015 at the Berlin-Tempelhof Measurement Point, compared with the long-term mean, 1961 through 1990.

Information on the expected highest groundwater level (EHGL) can be found in the Environmental Atlas under: /umweltatlas/en/water/groundwater-level-ehgl/2018/maps/artikel.962088.en.php.