During an excursion to the soil treatment facility of the Bauer Resources GmbH we learned what can be done if prevention has failed and in-situ treatment of polluted soil is not an option – and at which cost.
See the image captions for details.
We meet with Dr. Uwe Schlenker of Bauer Resources GmbH and Dr. Axel Fischer (TU Dresden).
Dr. Schlenker, a CIPSEM alumnus, explains how a former pig farm has been transformed into a soil treatment facility.
He answers a long series of questions about how different kinds of soil pollutions can be treated in-situ and ex-situ, in this treatment facility.
After optimising our outfits towards maximising visibility and lowering the risk for spreading pollutants, we set out for a tour of the premises.
This is one of the halls in which soil bacteria are provided good conditions (through regulation of aeration and temperature as well as addition of nutrients) for multiplying and breaking down pollutants.
Activated carbon, mainly from coconut shells, is for example used to treat emissions from the ventilation system of the facility.
The soil is partially being processed by machines and techniques used in composting plants.
Some of the processing is also done outdoors, on a sealed surface. All the run-off from this area is being collected and treated.
Dr. Schlenker activates the installation which cleans the wheels of lorries leaving the treatment facility.
The treated soil can be used for construction, not for food production.
Making decisions that affect people’s use of land is among the most anxious actions that any progressive society has to deal with. Some of the mainstream arguments claim that the economic needs of the country should always take the priority in determining land use, while others say that indigenous or traditional claims to land use have to be respected. Emphasizing humankind’s stewardship obligations, still others argue that where nature is threatened, the best use of land is excluding human intervention. Even though, the intensions of conservation might be industrious in protecting fauna and flora, its final consequences could also be destructive. For example, if the actions of protected areas impose misery on people especially those who are fully dependent on it for their survival, it is unlikely to succeed in the long run. Well! What is the best option of using natural resources then? This question seems easy to ask than answered!
As part of unpacking this complexity associated with land use, Environmental Management Class (EM40) led by Dr. Eckhard Auch, performed a simulation game on May 3rd 2017. The role play was based on a case of conservation area located in India (Kaziranga National Park) which was threatened by human encroachment. The intension of the scene was to bring all relevant stakeholders and involved actors to a meeting and eventually make an agreement on issue at stake (eviction of local users). The scene brought reality on the ground to the classroom and provided a lively discussion, arguments and counterarguments among the opposing parties.
Jürgen Habermas, a German Sociologist was right when he said “only by knowing the partner’s real interests (best), a negotiation can achieve best compromises”. I learned that land use is beyond the affiliation of certain actors. There are other stakeholders (private, civil society and NGOs etc.) who have a say and influence the decisions of every aspect. Hence, making compromises was one of the determinants of reaching success.
However, even with in this role play, the process of making compromise was not smooth either. It was quite challenging to reach a common ground even with in a small group of the same interest let alone confronting opposing parties.
On the other hand, moderation of such kind of meetings needed skillful tactics and attention to the details. For example, the facilitators’ understanding about the culture of the involved community or behavior of individuals is crucial while on the other hand systematically balancing the power of the actors in the discussion process is important factor for reaching a fair consensus.
Overall, being part of this exercise was a valuable brainstorming. It stirred my sense and brought my attention that land use management does not happen in a vacuum – it combines science and society. Though the process is complex per say, if well designed and managed, it can make a tangible progress and lead to a cumulative positive outcome or, in other words a win-win solution.
Ahmed Said Sulaiman is EM40 participant from Ethiopia
Rashid Sirelkhatim Mahgoub attended the CIPSEM Short Course on Soil and Land Resources in 2015. We are delighted to hear about his new work in eastern Sudan:
Rashid is now coordinator at the Talawiet Organization for Development, a local NGO which applies a drip irrigation project developed by the United Nations International Atomic Energy Agency (IAEA) and the Agricultural Research Cooperation (ARC). The pilot project showed that the method reduces water use by more than 60% while increasing food yields by more than 40%.
Read more about this promising project, the science behind it and Rashid’s work on the IAEA website.
In the frame of the module EM39 Soil & Land Resources an excursion on open cast lignite mining sites was organized on Tuesday 28th Jun 2016. Under the guidance of Prof. Kalbitz and Prof. Michael Haubold-Rosar, participants got the chance to learn more about the challenges of soil management. Besides discovering the impressive landscapes in such areas, we had deep insights in the principles and practices of soil reclamation and rehabilitation regarding water capacity or quality, nutrients status and ecological aspects.
It was reminded that soil formation takes time as shown by the geological map of the visited area, where the mining began at the end of the 19th century. The mining process was then explained, from mining preparation and water management to overburden removal and dumping. For instance, it is essential that the deposit is kept free from water in opencast mining. These operations are resources consuming but they are necessary to protect the soil and limit damages in the environment and people`s people health. Even some beneficial effects might derive from such investments as it is the case of recreation areas provided by man-made lakes emerging out of mining activities. The process of lands reclamation was documented with the visit of a former mining area where agriculture and forestry are now back.
For agriculture purposes, the reclaiming measures depend on the types of soil. Plants are selected in a rotation so as to fit to soil fertility. However it is difficult to reach the initial level of soil fertility. For example, it is needed 10 to 20% more seeds in reclaimed lands than in natural sites. Machines damages are also higher there.
The last stage of the excursion was to walk around a forest developing on a former dump site. In the context of forestry the time frame for reclamation is rather longer. A monitoring system has to be set up progressively about the behavior of plants response to this unusual situation. It was indicated that weathering, and stabilization effect of fly ash can have a positive impact on the growth of trees. Hot spots of nutrients occur and a typical humus layer formation may be found in this forest.
Certainly nature conservation and landscape preservation is one of the most important issues for soil protection and forestry management. Our visit to soil protection and forestry at Massenei was on 21st June, the welcomed excursion was introduced by Dr. Rainer Petzold – who works as consultant in soil monitoring laboratory and Toni Eßbach – leader of the forestry service unit.
Historically nature conservation and landscape preservation by the free state of Saxony are of paramount importance for the conservation of the nature and the landscapes, some 40% of the Saxon nature conservation area as well as 25% of the Natura 2000 areas in Saxony are located in the stated owned forest. The objectives are restoration of bog lands, renovation of pounds, meadow maintenance projects, and various species protection.
Recreation for forest education and public relations has an incomparable value, by forest owners and foresters to conserve the tourism. The maintenance and development of recreational services geared to the needs of the people are among the central social tasks of the public enterprise. For this reason Sachsenforst organizes guided tours for forest and environmental educations, as well as action days and others events to counter act the effects of the people’s alienation from forest and nature.
In other aspects, one third of Saxony’s land area is forestland and almost 50% of the Saxon forest estate is privately owned. The task of the public enterprise Sachsenforst employs forest rangers with direct responsibility for private and corporate forest owners for giving free advice in terms of forest management options, nature conservation in forest and use of financial aids and many others. For the conservation of the forest 9 million young forest trees such as oak, beech, sycamore maple or silver fir are planted in the forest every year. The reintroduction of silver fir is the largest species protection project in the Saxon forestlands. And hunting plays a key role in the protection both the forest conversion investment and the biological diversity in the forest.
Science and research at the wood and forestry competence centre develops the basic knowledge for forestry decision making process for the management in which develops technical conditions and skills for giving advice and assistance to private and corporate forest owners. The competence center is divided by forest protection, forest genetics, soil monitoring, forest management, forest inventories, mapping and many more.
Our group of the EM 39 course departed from Weberplatz to the Eastern Ore Mountains. (Altenberg region) at 8:05 am by chartered bus. The excursion was started with an explanation of the day’s activities by Prof. Dr. Karl-Heinz Feger. The excursion has focused on two major topics:
Integrated monitoring in forest ecosystems, biogeochemistry, forest soils and hydrology
A comprehensive introduction by Dr. Andrea and Prof. Feger.
Dr. Andreae together with Prof. Feger gave a comprehensive introduction into the forest, including history, coverage, management system, importance of forest ecosystems in general, and ongoing activities etc..
The altitude of the forest is 450 – 905 m asl. Types of ownership are five, the state owns the largest percentage (49.2%) of the forest. Other owners are quasi-state “Treuhand” (26.9%), private (15.9%), municipal (7.2%) and churches (0.2%).
Then our group entered a monitoring site where 15 rain gauges and other devices monitor and collect scientific data. Annual rainfall of the area is 800 – 1100 mm.
Dr. Andreae explains how to handle rain gauges.
The excursion gave an opportunity to learn about multifunctional forestry and the manifolds functions of forest: landscape conservation (100%), recreation (hiking, cross-country skinning) (28%), drinking water protection (14%), nature reserve (6%) and special soil protection (3%) (Source: distributed handouts). We also got a chance to see close up soil measurement plots and the measurement of seepage water.
View of the forest.
Group picture after the visit to the permanent soil monitoring facility.
After lunch break our group moved to the Kahleberg forest area as an example of ‘Air pollution and forest decline’ which was the next topic of the excursion. There has been severe forest decline in this area due to SO2 air pollution between 1960 and the early 1990s. Air quality and biogeochemical flux measurements at EU-Level-II sites have revealed a considerable decrease in sulfate and H+ deposition since 1990. Later, afforestation has been started in this area. Planted trees of this forest are from different parts of the world.
Melodious bird songs, the contrast/mixture of sun and rain, careful escorting by Roman and the experienced driver’s driving were the most beautiful parts of the excursion.
Report by Binod Das Gurung (Nepal)
Photos by Binod Das Gurung (Nepal) and Dulip Somirathna (Sri Lanka, 1photo)
On 30th May, 2016, the CIPSEM EM 39 participants led by Professor Dudel visited two sites in the town of Schlema. The group first toured the Wismut mine water treatment plant. At the plant, flooded mine water contaminated with heavy metals such as uranium, radium and arsenic is treated and then discharged into the Mulde River. Treatment was necessitated by prolonged mining period (1946-1990) that polluted both ground and surface water. The participants then toured by bus to the mine dumps/slug heaps. Remediation started in 1991 and was funded to the tune of more than 6 billion Euros by the German Federal government. Most of the remediated slug heaps are now covered with trees and grass. One of the remediated sites has been converted into a golf course.
The trip ended in style with a cultural tour and listening to organ music at the Sankt Annenkirche in Annaberg- Buchholz. A female church guide gave a brief history of the church built in 15th century initially Catholic but later changed to Protestant since the 16th century.
Report by Isaac Hokonya (Zimbabwe) and photos courtesy of Binod Gurung (Nepal) and Isaac Hokonya (Zimbabwe).