DEGRADACIÓN POR EROSIÓN HÍDRICA Erosión Hídrica ¿QUE ES? Bibliografía %C3%B3n_h%C3%. EROSION “Erosion es un proceso de movilización y transporte de partículas por agentes erosivos.” Ellison, Agentes erosivos Impacto de gotas de lluvia. La erosion hidrica de los suelos. Causas y remedios. D’Onofrio, G. Lietaert, F. Perez, C. FAO, Rome (Italy). Direccion de Fomento de Tierras y AguasMinisterio .
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Changes in, or the complete elimination of vegetative cover in the county have caused increased rates of soil erosion. Deposition is a selective process where the coarse particles are deposited leaving the sediment load enriched in fines. The county’s erosionn is semiarid with a marked marine influence.
Beretta Blanco, and G. This forecast of soil erosion by water indicated that From isolated to integrated long-term experiments: RUSLE is an empirical, parametric model which has been tested and validated under diverse soil, climate and management conditions. Vegetative cover resulting from mixed management of brushlands, reforestation of native forests ihdrica rangelands, and soil conservation practices in agricultural areas offer adequate protection against the erosive effects of rainfall in this region.
Inthere was land cover that promoted a mean annual soil loss higher than tolerable values in the northern, western and southern regions that was probably linked to soybean crop rotations and dairy production.
Data analysis The basins were analyzed by a cluster analysis for definition of homogeneous regions, and in each cluster, the factors that contribute in an important manner in the erosion process was determined. Over the last few years, large areas of natural forest have been converted to intensive wheat production, even in areas where slopes are steep enough that wheat cultivation is not recommended.
In addition, mean annual soil erosion of each basin was obtained by weighting the erosion of each soil unit within the basin, result shown in Figure 3b. This provides worst-case soil erosion estimates, as no soil conservation practices are assumed to be in place. This is due to more effective soil protection offered by increasing plant density with species that have demonstrated erosion control qualities.
Watersheds are denoted by blue polygons with black borders and departments are delineated by red lines.
Each scenario was designed to reflect distinct but practically feasible changes in vegetative cover. The northern-western-southern basins cluster and Sierras del Este basins clusters indicate the possibility of managing their erosion through control of vegetation cover, which is represented by the C-factor.
Integrated Crop Livestock Symposium. Land distribution according to estimated soil erosion under the current and proposed vegetative cover scenarios.
In this framework, the results of a year experiment on crop rotations of Experimental Station Alberto Boerger INIA La Estanzuela Colonia, Uruguay Quincke et al, suggest that crop rotation in the short term reduces soil erosion and, in the long term, increases the soil organic carbon and therefore indirectly should reduce the erodibility.
Soil conservation practices are implemented in agricultural areas, and communities of native forest and rangelands are planted with native species that have demonstrated capacity for reducing soil erosion.
La erosion hidrica de los suelos. Causas y remedios
We gratefully acknowledge Dr. A second aspect that arose from this cluster analysis and hidricx results of soil erosion in the basins Figure 3b is that the basins that need a modification of their land use to protect the freshwater quality are in the South, a region currently dominated by soybean crop rotations and dairy production.
Erosion control practice factor P-factor Frosion erosion control practice factor P-factor in this study was assumed to be equal to 1 because management hidriac that reduce erosion are not frequently used in Uruguay.
The C-factors in this new raster file were used to estimate the mean of the crop management of each polygon. The other part of erosivity is the part that management can change such as changes in infiltration that affects rate and amount of runoff and the present of material that reduces the forces applied to the soil. Updates are required to reduce the potential errors in present estimations.
Crop rotation has immediate effects on erosion through the change of C-factor and a long-term effect in changing the physical properties of the soil, particularly the K-factor. Soil losses were estimated for the current and for three alternate scenarios of vegetative cover. In Uruguay, where there is heavy use of soil for agriculture, there is a need to continually develop erosikn update erosion management policies.
Ephemeral gullies reoccur in the same location, rills are parallel and generally do not reoccur in the same erosiin. Management plans may be oriented towards reducing soil erosion, but they may also include measures to recover soil productivity and favor sustainable agricultural and forestry development while supporting local biodiversity.
Do not use a K value that has been adjusted for rock fragments on the soil surface because use of such an adjusted K value can cause a major mathematical error in RUSLE2. eosion
Erosión hídrica del suelo estimada para 99 cuencas uruguayas
The superposition of the layers in the GIS allows RUSLE parameters to be assigned to each cell, and soil erosion by water is estimated on a cell by cell basis.
Vegetation in these types of environments depends strongly on surface runoff, and plays an important role in controlling soil erosion Bathurst et al. With the exception of the interaction between the R factor and the C factor, not interaction between the USLE factors were considered.
Maximum rainfall in 1 and 24 h for a 2-yr return period were obtained by fitting a log-normal model to the data. In the departments along the southwestern and southern coast, which were grouped into cluster 1 basins cluster of northern-western-southern and where the crop management factor is dominant Table 3there was a clear need for an incentive to rotate crops, specifically those with pastures, as a mitigation measure.
Given that erosion control measures for rangeland, agricultural soil and native forest are the same for all three scenarios; our choice of vegetative cover is driven by the management of brushlands.
Even though deposition occurs on the midpart of this hillslope, the entire hillslope length has to be considered because of the origin of the runoff that flows over the lower portion. Referring to supporting practices as conservation practices is improper.
Organizing terrain information in GIS layers makes the implementation of RUSLE hidgica interesting when evaluating different vegetative covers in order to reduce soil erosion.
Modelling the impact of forest loss on shallow landslide sediment yield, Ijuez river catchment, Spanish Pyrenees.
Departamento de Suelos, Ministerio de Agricultura y Pesca. To make this website work, we log user data and share it with processors. The digital terrain model allowed a geo-referenced LS-factor for each soil polygon in the studied basins. Predicting soil erosion by water: Recommended vegetative cover to reduce soil loss in Santo Domingo County scenario 3.
The results include the following values: Finally, it was not possible to attribute any dominant factor in basins cluster 4. In their undisturbed state, brush of this nature should have C values close to 0. The C-factor noted in Table 1 corresponds to a mean C-factor for a type of crop rotation developed with no tillage, according to the land cover identified by shapefile LCCS and soil aptitude information Molfino,