000 | 01653nab a22002297a 4500 | ||
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003 | OSt | ||
005 | 20220428093702.0 | ||
008 | 140107t1993 xxu|||||r2||| 00| 0 eng d | ||
022 | _a0140-1963 | ||
040 | _cUGICENPAT | ||
082 | _a551.352 | ||
100 |
_946 _aCoronato, Fernando |
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245 | _aMethodological comparison in the estimate of fluvial erosion in an arid closed basin of northeastern Patagonia | ||
260 |
_bElsevier _c, 1993 |
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300 | _a; 231-239 p. | ||
440 |
_9278 _aJournal of Arid Environments _n Nº 24 _x0140-1963 |
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520 | _aFluvial erosion was measured in a closed basin in the arid northeastern Patagonia using the following methods: drainage plots, decrease in capacity of playa-lake-bottom by sediment filling, and Universal Soil Loss Equation (USLE). Although results show a small amount of fluvial erosion, the different methodologies do not explain the observed differences, which would be due to the relative importance that gully erosion has in the area. The erosion plots and the USLE exclude this kind of erosion in their calculation, but it is implicitly considered in playa-lake filling. This means that gully erosion yields approximately 58% of total sediment received by the playa-lake bottom. Comparable values are mentioned by different authors and although the gully density is clearly lower than the maximum reported in the literature, it appears to be an important factor improving the USLE when it is applied to arid rangelands. | ||
651 |
_950 _aPATAGONIA ARGENTINA |
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653 | _aErosión fluvial (fluvial erosion) | ||
700 |
_9189 _aDel Valle, Héctor F. _gCentro Nacional Patagónico |
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942 |
_2ddc _cSEPA |
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999 |
_c194 _d194 |