Prof. Dr. Harald Zepp and Dr. Till Kasielke were invited by Prof. Dr. Zhang Bin, Chinese Academy of Agricultural Sciences (CAAS) to the Black Soil Region in Northeastern China. Besides lectures in Harbin at the Northeast Institute of Geography and Agroecology (CAS, Chinese Academy of Sciences), they conducted field work on soil erosion in China’s Black Soil region. Northeast China looks back on a fairly young agricultural history of only about 100 years. Soil erosion accelerated with the onset of land use change, especially the cultivation of corn. Extensive gully systems developed. Despite a general success of erosion protection measures, such as terracing and planting trees, several gullies in the afforested areas continued to grow up to the present. In February and March 2018, the PhD candidate Wen Yanru had spent two months in Bochum. She prepared the current field work by remote sensing interpretation.Together with Zhang Bin, Wen Yanru and Li Hao, Till Kasielke and Harald Zepp mapped gully topographies, sediment architecture and analyzed soil profiles to detect the complex process combinations that lead to gully formation and their further development. In this region, soil erosion by water is accompanied by swelling and shrinking of the black soils. They are derived from loess-like parent material and are rich in clay. During the harsh winter seasons with temperatures below -20 °C, frost cracks contribute to the collapse of gully walls. During their field work, the researchers were based at the Hailun CAS Field Station.
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