| EVALUATION OF RILL AND EPHEMERAL GULLY EROSION IN CULTIVATED AREAS OF NAVARRE （SPAIN） |
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| 引用本文： | L. M. De SANTISTEBAN,J. CASALí,J. J. L.EVALUATION OF RILL AND EPHEMERAL GULLY EROSION IN CULTIVATED AREAS OF NAVARRE （SPAIN）[J].国际泥沙研究,2005,20(3):270-280. |
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| 作者姓名： | L. M. De SANTISTEBAN J. CASALí J. J. L |
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| 作者单位： | [1]Postdoctoral scholarship holder, Department of Projects and Rural Engineering, Universidad Pfblica de NavarraCampus de Arrosadia s/n, 31006 Pamplona （Navarra）.Spain. [2]Professor, Department of Projects and Rural Engineering, Universidad Pfblica de Navarra Campus de Arrosadias/n, 31006 Pamplona （Navarra）, Spain |
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| 基金项目： | under Agreement，the Research Project Caracterización de la erosión de suelo en áreas cultivadas de Navarra，the Spanish Ministry of Science and Technology |
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| 摘 要： | Although there is much evidence of intense soil erosion in cultivated areas of Navarre （Spain）, scarce information currently is available regarding soil loss rates, the spatial and temporal distribution of erosion, and the factors controlling these processes. Rills and ephemeral gullies are frequently responsible for a high percentage of total soil erosion, and these features can be considered a good approximation for the minimum erosion rates. With the main purpose of determining the annual soil loss rates in cultivated areas of Central Navarre, a detailed assessment of rainfall and rill and gully erosion was made in 19 small watersheds cultivated with winter grains or vineyards. The study period spanned from 1995 to 2001. For cereal watersheds, soil losses were caused by only one or two rainfall events each year. High erosion rates were observed （0.20-11.50 kg/m^2 per year）. In vineyards, soil losses were caused by several rainfall events each year, occurring year round. High erosion rates were observed in these vineyards （0.33 y 16.19 kg/m^2 per year）. No erosion was observed in those cultivated watersheds with no-till practices. It can be concluded that rill and ephemeral gully erosion can be very significant in Mediterranean regions, and much more attention should be paid to the problem.
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| 关 键 词： | 西班牙 河流 侵蚀作用 土壤 水土流失 生态环境 水土保持 |
EVALUATION OF RILL AND EPHEMERAL GULLY EROSION IN CULTIVATED AREAS OF NAVARRE (SPAIN) |
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| L. M. De SANTISTEBAN.EVALUATION OF RILL AND EPHEMERAL GULLY EROSION IN CULTIVATED AREAS OF NAVARRE (SPAIN)[J].International Journal of Sediment Research,2005,20(3):270-280. |
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| Authors: | L M De SANTISTEBAN |
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| Abstract: | Although there is much evidence of intense soil erosion in cultivated areas of Navarre (Spain), scarce information currently is available regarding soil loss rates, the spatial and temporal distribution of erosion, and the factors controlling these processes. Rills and ephemeral gullies are frequently responsible for a high percentage of total soil erosion, and these features can be considered a good approximation for the minimum erosion rates. With the main purpose of determining the annual soil loss rates in cultivated areas of Central Navarre, a detailed assessment of rainfall and rill and gully erosion was made in 19 small watersheds cultivated with winter grains or vineyards. The study period spanned from 1995 to 2001. For cereal watersheds, soil losses were caused by only one or two rainfall events each year. High erosion rates were observed (0.20-11.50 kg/m2 per year). In vineyards, soil losses were caused by several rainfall events each year, occurring year round. High erosion rates were observed in these vineyards (0.33 y 16.19 kg/m2 per year). No erosion was observed in those cultivated watersheds with no-till practices. It can be concluded that rill and ephemeral gully erosion can be very significant in Mediterranean regions, and much more attention should be paid to the problem. |
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| Keywords: | Rill erosion Ephemeral gully erosion Spain Navarre |
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