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An examination of the efficiency of a simple runoff plot sample splitter

An examination of the efficiency of a simple runoff plot sample splitter
Ablation spécifique ; Dynamique de versant ; Débit ; Erosion des sols ; Expérimentation ; Géographie physique ; Sédimentologie ; Versant
The study investigated the effect of flow rate, sediment concentration and sediment grain size on the efficiency of a simple runoff plot sample splitter.

Runoff and soil erosion from areas of burnt scrub : comparison of experimental results with those predicted by the WEPP model

Runoff and soil erosion from areas of burnt scrub : comparison of experimental results with those predicted by the WEPP model
Bilan hydrologique ; Erosion des sols ; Espagne ; Expérimentation ; Feu ; Galicia ; Modèle ; Prévision ; Ruissellement
Experimentation ; Fire ; Forecast ; Galicia ; Model ; Rill wash ; Soil erosion ; Spain ; Water balance
The effects of burning on runoff and soil erosion from scrub-bearing hillslopes in northwest Spain were investigated by monitoring of experimental plots over a 4-year period. In this study the Water Erosion Prediction Project (WEPP) hillslope model
was used to predict runoff and erosion from each of the experimental plots, and predicted values were compared with those observed in the field.

Scale relationships in hillslope runoff and erosion

Arizona ; Bassin-versant ; Bilan sédimentaire ; Domaine semi-aride ; Ecoulement ; Erosion ; Etats-Unis ; Expérimentation ; Granulométrie
Arizona ; Erosion ; Experimentation ; Grain size distribution ; Runoff ; Sediment budget ; Semi-arid area ; United States of America ; Watershed
Eight runoff plots, located within a small catchment within the Walnut Gulch Experimental Watershed, southern Arizona, were consructed to test the argument that sediment yield decreases as plot length increases. Runoff and sediment loss from
these plots were obtained for 10 natural storm events. Analysis of both runoff and sediment yield from the plots indicates that the relationship of sediment yield to plot length derives both from the limited travel distance of individual entrained particles
and from a decline in runoff coefficient as plot length increases.

Some soil erosion factors and losses from experimental plots in the university farm, University of Ife, Ile-Ife, Nigeria

Some soil erosion factors and losses from experimental plots in the university farm, University of Ife, Ile-Ife, Nigeria
Erosion des sols ; Expérimentation ; Facteur ; Géographie de l'Afrique ; Ile-Ife ; Nigeria ; Parcelle expérimentale ; Ravinement ; Ruissellement ; Sol ; Technique de recherche

Some methods of directly assessing water erosion of cultivated land. A comparison of measurements made on plots and in fields

Some methods of directly assessing water erosion of cultivated land. A comparison of measurements made on plots and in fields
Agropedology ; Experiment plot ; Gully erosion ; Methodology ; Rill wash ; Soil erosion ; Splash
Here, brief reference is made to ways of directly measuring soil erosion and their suitability for use in farmers' fields. Some comments are made on the technique most widely used to measure erosion: experimental plots. Measurements of erosion made
in farmers' fields are then described and the results from plot-based experiments are compared with them.

The effect of soil crust on the generation of runoff on small plots in an arid environment

The effect of soil crust on the generation of runoff on small plots in an arid environment
Arid area ; Desert ; Duricrust ; Experiment plot ; Israel ; Negev ; Rainfall simulation ; Rill wash ; Roughness ; Salt ; Soil properties
. The field trial was carried out in the Mashash experimental runoff farm in Israel's Negev desert. Runoff was measured on 8 plots using a tipping-bucket system. Results and discussion.
The aim of this research was to study the factors that influence the generation of runoff in small plots under natural rainfall conditions. Factors studied were crust permeability, roughness, soil salt content and time gaps between the rain showers

Accuracy of two sampling methods used to estimate sediment concentrations in runoff from soil-loss plots

Accuracy of two sampling methods used to estimate sediment concentrations in runoff from soil-loss plots
Experimental plot ; Methodology ; Rill wash;Runoff ; Slope ; Soil erosion

Measurement of runoff and soil loss from two differently sized plots in a subtropical environment (Brazil)

Measurement of runoff and soil loss from two differently sized plots in a subtropical environment (Brazil)
Aggregate ; Brazil ; Experiment plot ; Paraná ; Precipitation ; Rill wash ; Sediment transport ; Soil erosion ; Soil properties ; Subtropical zone ; Water erosion
Agregado ; Brasil ; Chorreo ; Erosión de los suelos ; Erosión hídrica ; Parcela experimental ; Precipitación ; Propiedades del suelo ; Transporte sedimentario ; Zona subtropical
The aim of this study was to assess the effects of plot size on runoff and soil loss in a subtropical environment near Guarapuava (Parana). Data were collected from 10 paired plots, 5 plots measuring 10m x 1m and 5 plots measuring 1m x 1m, installed
in the same pedo-geomorphologic unit. Measurements were carried out from November 2008 to November 2009. During this period, 97 natural storms were registered. The results indicate that the small plots tended to have higher runoff compared to larger plots
, especially during periods of greater rainfall volume, duration and intensity. The results of the small plots were comparable to the results obtained on the large plots, especially in relation to soil loss. These plots were useful for short-term assessments

Influence of vegetation recovery on water erosion at short and medium-term after experimental fires in a Mediterranean shrubland

Influence of vegetation recovery on water erosion at short and medium-term after experimental fires in a Mediterranean shrubland
Experiment plot ; Fire ; Mediterranean area ; Scrub ; Sediment budget ; Soil erosion ; Spain ; Valencia ; Vegetation dynamics ; Water erosion ; Watershed
This paper reports the influence that vegetation recovery has exerted on the soil behaviour to erosion by water during both the first and eight years after experimental fires. The work was carried out at La Concordia Experimental Station (Valencia
, Spain), which includes 9 plots installed on a calcareous hillside representative of Mediterranean shrubland areas. Rain events between June 1995 to June 1996 and from June 2002 to June 2003 were monitored and their effect on soil erosion processes
determined. The vegetation changes (biomass amount and plant cover) for each studied period were also assessed. Runoff generation still remains greater in burned plots than in the control ones eight years after the fire.

Statistical distribution of soil loss and sediment yield at Sparacia experimental area, Sicily

Statistical distribution of soil loss and sediment yield at Sparacia experimental area, Sicily
Bassin expérimental ; Bassin-versant ; Bilan sédimentaire ; Crue ; Distribution statistique ; Ecoulement ; Erosion des sols ; Erosion hydrique ; Italie ; Précipitation ; Sicilia ; Statistique
Experimental catchment ; Flood ; Italy ; Precipitation ; Runoff ; Sediment budget ; Sicilia ; Soil erosion ; Statistical distribution ; Statistics ; Water erosion ; Watershed
Balance sedimentario ; Crecida ; Cuenca experimental ; Cuenca hidrográfica ; Distribución estadística ; Erosión de los suelos ; Erosión hídrica ; Escorrentía ; Estadística ; Italia ; Precipitación ; Sicilia
An analysis of the statistical distribution of event soil loss was carried out using the data collected in the period 1999–2008 at the microplots and plots of the Sparacia experimental area (Sicily, Italy). In particular, the theoretical probability
at different spatial scales (plot, basin) were compared.

Testing the physical model concept by soil loss data measured in Sicily

Cultivated land ; Experiment plot ; Forecast ; Italy ; Model ; Quantitative analysis ; Sicilia ; Soil erosion
Análisis cuantitativo ; Erosión de los suelos ; Italia ; Modelo ; Parcela experimental ; Previsión ; Sicilia ; Suelo cultivado
In this paper the physical model concept developed in USA was tested by using soil loss data collected on plots of different length at the experimental station of Sparacia, in Sicily (South Italy). This investigation supported the conclusions that i
by a replicated plot measurement. This calculation is useful since it allows to quantitatively establish the maximum gap that has to be covered by an alternative simulation model to obtain the realistically best estimate of plot soil loss at the event temporal

La vitesse de l'érosion sous culture en région limoneuse

Measurements of rills, borings, to estimate the volume of colluvial deposits in dry valleys and in enclosed depressions and cultivation on experimental plots show that structural stability is very influential in erosion control. In some plots mean

A new expression of the slope length factor to apply USLE-MM at Sparacia experimental area (Southern Italy)

A new expression of the slope length factor to apply USLE-MM at Sparacia experimental area (Southern Italy)
Erosion control ; Experiment plot ; Italy ; Model ; Sicilia ; Slope gradient ; Soil erosion ; Water erosion
Erosión de los suelos ; Erosión hídrica ; Inclinación de la vertiente ; Italia ; Lucha contra la erosión ; Modelo ; Parcela experimental ; Sicilia
The USLE scheme cannot be used at the Sparacia experimental area (near Palermo,Sicily) to predict event soil loss per unit plot area, Ae, because experimental data suggest that, generally, Ae does not increase with plot length, λ. The USLE-MM scheme
and decrease with plot length. Improving runoff coefficient prediction at the field scale is desirable.
[a4] Estación Experimental de Zonas Áridas, Consejo Sup. de Investigaciones Científicas (EEZA-CSIC), Desertification and Geoecology Dept., Almeria, Espagne

An improved rainfall erosivity index obtained from experimental interrill soil losses in soils with a Mediterranean climate

An improved rainfall erosivity index obtained from experimental interrill soil losses in soils with a Mediterranean climate
Cataluña ; Domaine méditerranéen ; Erosion des sols ; Erosion hydrique ; Espagne ; Expérimentation ; Indice ; Précipitation ; Splash
Catalonia ; Experimentation ; Index ; Mediterranean area ; Precipitation ; Soil erosion ; Spain ; Splash ; Water erosion
The goal of this work was to improve rainfall erosivity indices for the Mediterranean conditions from experimental interrill soil losses measured in natural conditions in 1-m2 plots. The plots were located in 3 vineyard fields, whose soils

Summer and winter regimes of runoff generation and soil erosion on cultivated loess soils (The Netherlands)

Climatic variation ; Experimental plot ; Loess ; Netherlands (The) ; Rill wash;Runoff ; Seasonal variation ; Soil erosion ; Soil property
Monthly runoff and soil loss data of three fallow experimental plots are presented, comprising a summer and following winter season. Implications for runoff and erosion of climatic change, involving increased rainfall amounts or intensities

Plot sizes dependency of runoff and sediment yield estimates from a small watershed

Plot sizes dependency of runoff and sediment yield estimates from a small watershed
Experiment plot ; Impact ; Iran ; Rainstorm ; Scale ; Sediment budget ; Semi-arid area ; Slope exposure ; Soil erosion ; Water erosion ; Watershed
Balance sedimentario ; Campo semiárido ; Cuenca hidrográfica ; Erosión de los suelos ; Erosión hídrica ; Escala ; Exposición de las vertientes ; Impacto ; Irán ; Parcela experimental ; Tormenta
This paper aimed to evaluate the accuracy of soil erosion plots with different lengths in estimation of runoff and soil loss from the Sanganeh watershed, in Razavi Khorasan Province of Iran. Runoff and sediment was collected at the outlet of each
plot as well as main outlet of the watershed associated with 12 storm events occurred during November 2006 to June 2007. The results verified that the accuracy of plot estimates on sediment and runoff improved while the plot length increased
. The optimal lengths for estimation of sediment and runoff parameters were found 15 and preferably 20 m for plots located on southern slope. No significant difference was also proved among estimates obtained from plots established on north facing slope
[a4] Estación Experimental de Zonas Áridas, Consejo Sup. de Investigaciones Científicas (EEZA-CSIC), Desertification and Geoecology Dept., Almeria, Espagne

Effectiveness of geotextiles in reducing runoff and soil loss : a synthesis

Agropedology ; Erosion control ; Experiment plot ; Geotextile ; Rainfall simulation ; Rill wash ; Soil erosion ; Splash ; Water erosion
Agrología ; Chorreo ; Erosión de los suelos ; Erosión hídrica ; Lucha contra la erosión ; Parcela experimental ; Simulacíon de lluvia ; Splash
The aim of this review is to analyse the effects of plot length (L) and other possible affecting factors [cover percentage (C, %), slope gradient (S), rainfall duration (D), rainfall intensity (I), sand, silt and clay contents, soil organic matter
(SOM) content and geotextile type (natural or synthetic)] on the effectiveness of geotextiles in reducing soil and water loss, based on reported experimental data. From linear regressions, C (%) and soil sand, silt and clay contents are found
to be the most important variables in reducing SLR (ratio of soil loss in bare plots to that in geotextile treated plots) for splash, C (%) for interrill and D (min) for rill and interrill erosion processes, respectively. Soil clay and silt contents and D are key
variables in decreasing RR (ratio of runoff from bare plots to that from geotextile treated plots) for interrill, and clay content for rill and interrill erosion processes, respectively.

Effects of fire and of clearing in a mediterranean Quercus ilex woodland : an experimental approcach

Effects of fire and of clearing in a mediterranean Quercus ilex woodland : an experimental approcach
The object of the study is to compare the importance of soil and nutrient losses from plots in an ever green oak woodland under different environmental conditions.

Surface and subsurface flow from a Natal coastal catchment in Proceedings.

Afrique du Sud ; Bassin-versant ; Charge dissoute ; Débit ; Ecoulement ; Ecoulement hypodermique ; Expérimentation ; Géographie de l'Afrique ; Natal
A system was installed to collect surface and subsurface flow components from experimental plots under grassland. Subsurface flow and soil removal were found to be substantial.

Etudes multispectrales à faible altitude en agronomie in (Actes).

Couverture végétale ; Expérimentation ; Généralités sur la géographie ; Radiomètre ; Réflectance ; Seuil de réflectance ; Sol ; Taux de recouvrement ; Technique de recherche ; Télédétection
Spectroradiometric measurements have been done at 2 m and 1200 m high over experimental plots in June 1973. They allowed to define a threshold for which green vegetation influences soil reflectance.

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