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Assessment of environmental efficiency of various land use system in Haean catchment, South Korea

Ganga Ram Maharjan1, Christopher L. Shope2, Trung Thanh Nguyen3, Koellner Thomas4, Kim Seong Joon5, Tenhunen John6, Bernd Huwe7, Sebastian Arnhold4
1 Soil physics department, University of Bayreuth
2 US Geological Survey, 2329 Orton Circle, Salt Lake City, UT, USA 7235
3 University of Bayreuth, Bayreuth Center of Ecology and Environmental Research (BayCEER), Universitatstrasse 30, 95440 Bayreuth, Germany
4 University of Bayreuth, Professorship of Ecosystem Services, Universitatstrasse 30, 95440 Bayreuth, Germany
5 Konkuk University, Dept. of Civil & Environmental System Engineering, Seoul 143-701, Korea
6 University of Bayreuth, Bayreuth, Dept. of Plant Ecology, Universitatstrasse 30, 95440 Bayreuth, Germany
7 University of Bayreuth, Dept. of Soil Physics, Universitatstrasse 30, 95440 Bayreuth, Germany

O 3.1 in …We might get feedback on problems with our experiments and contradictory results.

02.10.2014, 16:20-16:35, H36, NW III

Intensive agriculture practices in Haean catchment in South Korea produce extensive sediment and nutrient export to Soyang Lake. The SWAT model was used to quantify the spatial distribution of crop productivity, surface runoff, and sediment caused by different land use scenarios for the Haean catchment. The different crop expansion scenarios including a base line scenario were used to identify the individual optimum land use systems that produce a) minimum surface runoff, b) minimum sediment, c) maximum yield and d) maximum income for each field. The study also investigated the existence of tradeoffs among surface runoff, sediment, crop yield, and the associated income from those optimize land use systems. The land use system optimized for minimum surface runoff and sediment showed tradeoffs of producing lower crop yield and lower income. On the other hand, the land use systems that produced maximum crop yield and farm income showed more surface runoff and sediment. Among all optimized land use scenarios, the implementation of a land use system that optimizes maximum yield produces the highest sediment, the second highest surface runoff and the lowest income. However, the implementation of certain land use systems requires compensation for the loss of income and for the damage of the environment for which the land use system could be beneficial for both ecology and economy.

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last modified 2014-09-09