Stefan Wirtz Vom Fachbereich VI (Geographie/Geowissenschaften ...

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Experimentelle Rinnenerosionsforschung vs. Modellkonzepte – Quantifizierung der hydraulischen und erosiven Wirksamkeit von Rinnen Table 1 Temperature, precipitation, northing and easting of the four test areas. Tested Rill Meteorological station Average annual temperature Annual precipitation Northing of the rill Easting of the rill Freila 1+3 Baza 14.2 °C 368 mm 4154368 509860 Freila 2 Baza 14.2 °C 368 mm 4154398 509826 Negratin Baza 14.2 °C 368 mm 4156324 505710 Salada Embalse Valdeinfierno 13.4 °C 311 mm 4187266 595761 Belerda Granada 15.6 °C 473 mm 4133440 478070 Negratin and Freila: The areas are located within the Hoya de Baza sedimentary basin and composed of marls, in which calcareous Regosols have developed. The climate is semi-arid and vegetation is dominated by low shrubs and Stipa tenacissima grass tussocks. The land cover at the south side of the Negratin-dam is dominated by abandoned cereal fields, which are extensively grazed by sheep and agricultural land comprised mainly of cereal dry-farming and almond grooves [46]. Salada: Located at the SE-margin of the Betic range (SE-Spain), inside the penibetic complex. The area is composed of conglomerates with a clayey to loamy matrix, in which Regosols as well as to fairly developed (Calcic) Cambisols have developed. Vegetation is similar to that found in the Freila and Negratin-area. The climate is semi-arid too, but less accentuated than in the previously mentioned area [46]. Here a mixed pattern of rainfed agricultural areas, mainly cereals, olives and almonds, and abandoned or uncultivated regions is to find. Belerda: This test area is located in the Guadix basin. The parent material consists of tertiary and quaternary conglomerates, sands, silts and clays. The soil texture class following the FAO [47] is a silty clay loam. The land use is separated into cultivated areas, with almond and olive groves, and abandoned agricultural fields [48]. The climate is, though still semi-arid, characterised by higher average annual temperatures and precipitations in comparison with the other test zones. The climatic parameters of the test fields are summarized in table 1. Tested rills: The main descriptors of the rills are summarized in table 2; photographies of the rills are presented in figure 1. 183
Experimentelle Rinnenerosionsforschung vs. Modellkonzepte – Quantifizierung der hydraulischen und erosiven Wirksamkeit von Rinnen Figure 1 Photographies of the tested rills Table 2 Rill parameters: Grain size class limits are from [49], texture class is determined following [47]. Freila 1 Freila 2 Freila 3 Negratin Salada Belerda Ø Slope [°] 9.4 7.7 9.4 5.6 25.6 16.9 Max. Slope [°] 15.2 14.1 15.2 12.9 7.3 12.5 Tested flow length [m] 16 21 16 30 17 23 Texture class SL SL SL SiL SiCL L Gravel > 2000 µm [%] 30 30 30 1 1 13 Sand 2000-630 µm [%] 14 14 14 1 2 10 630-200 µm [%] 14 14 14 5 2 10 184
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Stefan Wirtz Vom Fachbereich VI (Ge
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Danksagung Danksagung Die vorliegen
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Inhaltsverzeichnis Inhaltsverzeichn
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Inhaltsverzeichnis Abbildungsverzei
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Dipl. Geogr. Stefan Wirtz; Physisch
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Stefan Wirtz Vom Fachbereich VI (Geographie/Geowissenschaften ...

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