Assessment of soil erosion in a small watershed covered by loess
Identifieur interne : 002977 ( Main/Exploration ); précédent : 002976; suivant : 002978Assessment of soil erosion in a small watershed covered by loess
Auteurs : Ádám Kertész [Hongrie] ; Béla Márkus [Hongrie] ; Gerold Richter [Allemagne]Source :
- GeoJournal [ 0343-2521 ] ; 1995-06-01.
Abstract
Abstract: Loose sediments like loess are easily erodable especially on hillslopes used for agriculture. Erosion contributes to the sedimentation and pollution of lakes such threatening quasi-natural ecosystems. On the other hand soil erosion damages fertile soils. The aim of the present paper is the assessment of soil and nutrient loss in a tributary catchment of Lake Balaton, including geoecological aspects of the lake ecosystem and of the slopes mantled by loess. The USLE is applied for small topological units, for the so called erotops. Rainfall simulation experiments were applied for the determination of the erodibility of soils. The calculation is based on a new, GIS aided method. Control measurements have been going on for four years at a gauging station to check how much sediment and water actually leaves the catchment. Results of sediment yield measurements were compared with the results obtained by the application of USLE for the whole catchment. According to this comparison only 2% leaves the catchment so that redeposition processes within the catchment are very important whereas the contribution of soil erosion to the eutrophication of the lake is not very significant in the small tributaries in the northern part of Lake Balaton catchment.
Url:
DOI: 10.1007/BF00813188
Affiliations:
- Allemagne, Hongrie
- Hongrie centrale, Rhénanie-Palatinat
- Budapest, Trèves (Allemagne)
- Université de Trèves
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Erosion contributes to the sedimentation and pollution of lakes such threatening quasi-natural ecosystems. On the other hand soil erosion damages fertile soils. The aim of the present paper is the assessment of soil and nutrient loss in a tributary catchment of Lake Balaton, including geoecological aspects of the lake ecosystem and of the slopes mantled by loess. The USLE is applied for small topological units, for the so called erotops. Rainfall simulation experiments were applied for the determination of the erodibility of soils. The calculation is based on a new, GIS aided method. Control measurements have been going on for four years at a gauging station to check how much sediment and water actually leaves the catchment. Results of sediment yield measurements were compared with the results obtained by the application of USLE for the whole catchment. According to this comparison only 2% leaves the catchment so that redeposition processes within the catchment are very important whereas the contribution of soil erosion to the eutrophication of the lake is not very significant in the small tributaries in the northern part of Lake Balaton catchment.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Hongrie</li></country><region><li>Hongrie centrale</li><li>Rhénanie-Palatinat</li></region><settlement><li>Budapest</li><li>Trèves (Allemagne)</li></settlement><orgName><li>Université de Trèves</li></orgName></list><tree><country name="Hongrie"><region name="Hongrie centrale"><name sortKey="Kertesz, Adam" sort="Kertesz, Adam" uniqKey="Kertesz A" first="Ádám" last="Kertész">Ádám Kertész</name></region><name sortKey="Markus, Bela" sort="Markus, Bela" uniqKey="Markus B" first="Béla" last="Márkus">Béla Márkus</name></country><country name="Allemagne"><region name="Rhénanie-Palatinat"><name sortKey="Richter, Gerold" sort="Richter, Gerold" uniqKey="Richter G" first="Gerold" last="Richter">Gerold Richter</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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