scholarly journals The effect of intense rainstorm events on the suspended sediment response under various land uses : the Aísa Valley experimental station

2012 ◽  
Vol 38 (1) ◽  
pp. 27 ◽  
Author(s):  
E. Nadal-Romero ◽  
T. Lasanta Martínez ◽  
J. C. González-Hidalgo ◽  
M. De Luis ◽  
J. M. García-Ruiz
Keyword(s):  
Suspended Sediment ◽  
Land Uses ◽  
Experimental Station

scholarly journals Suspended sediment source and propagation during monsoon events across nested sub-catchments with contrasted land uses in Laos

2017 ◽  
Vol 9 ◽  
pp. 69-84 ◽  
Author(s):  
Sylvain Huon ◽  
Olivier Evrard ◽  
Elian Gourdin ◽  
Irène Lefèvre ◽  
Thierry Bariac ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Sediment Source ◽  
Land Uses

Impact of suspended sediment and nutrient loading from land uses against water quality in the Hii River basin, Japan

2012 ◽  
Vol 450-451 ◽  
pp. 25-35 ◽  
Author(s):  
H. Somura ◽  
I. Takeda ◽  
J.G. Arnold ◽  
Y. Mori ◽  
J. Jeong ◽  
...  
Keyword(s):  
Water Quality ◽  
Suspended Sediment ◽  
River Basin ◽  
Nutrient Loading ◽  
Land Uses

scholarly journals Runoff and Solute Outputs under Different Land Uses: Long-Term Results from a Mediterranean Mountain Experimental Station

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 976 ◽  
Author(s):  
Estela Nadal-Romero ◽  
Makki Khorchani ◽  
Teodoro Lasanta ◽  
José M. García-Ruiz
Keyword(s):  
Soil Erosion ◽  
Water Chemistry ◽  
Fallow Land ◽  
Land Uses ◽  
Shrub Cover ◽  
Shifting Agriculture ◽  
Experimental Station ◽  
Abandoned Field ◽  
Land Covers

Water availability and quality in Mediterranean environments are largely related to the spatial organisation of land uses in mountain areas, where most water resources are generated. However, there is scant data available on the potential effects of land use changes on surface water chemistry in the Mediterranean mountain region. In order to address this gap in the research, this study investigates the effects of various mountain Mediterranean land covers/land uses on runoff water yielded and water chemistry (solute concentrations and loads) using data from the Aísa Valley Experimental Station (Central Pyrenees) for a long-term period (1991–2011). Nine land covers have been reproduced in closed plots, including dense shrub cover, grazing meadows, cereal, fallow land, abandoned field, shifting agriculture (active and abandoned) and 2 burned plots (one burned in 1991 and the second one burned twice in 1993 and 2001). Results show that all solute concentrations differed among land uses, with agricultural activity producing significantly higher solute loads and concentrations than the other types. Two groups have been identified: (i) the lowest solute concentrations and the smallest quantities of solute loads are recorded in the dense shrub cover, the plot burned once (at present well colonized with shrubs), meadows and abandoned field plots; (ii) the plot burned twice registered moderate values and the highest solute concentrations and loads are found in cereal, fallow land and shifting agriculture plots. Water chemistry is clearly dominated by Ca2+ and HCO3− concentrations, whereas other solutes are exported in very low quantities due to the poor nutrient content of the soil. These results complete the information published previously on soil erosion under different land uses in this experimental station and help to explain the evolution of land cover as a consequence of shifting agriculture, cereal farming on steep slopes and the use of recurrent fires to favour seasonal grazing. They also suggest that promoting the development of grazing and cutting meadows is a good strategy to reduce not only soil erosion but also the loss of nutrients.

RELATIONSHIPS BETWEEN SOLUBLE AND EXCHANGEABLE Ca, Mg AND K LOST FROM AGRICULTURAL WATERSHEDS

1978 ◽  
Vol 58 (4) ◽  
pp. 487-499 ◽  
Author(s):  
G. H. NEILSEN ◽  
A. F. MacKENZIE
Keyword(s):  
Suspended Sediment ◽  
Surface Soil ◽  
Calcareous Soils ◽  
Agricultural Watersheds ◽  
Land Uses ◽  
Exchangeable Ca ◽  
Suspended Sediment Concentrations ◽  
Exchange Constants ◽  
Small Grains ◽  
K Fertilization

Seven agricultural watersheds in southeastern Ontario and southwestern Quebec with varying land uses and soil types were sampled 14 times between 7 May 1974 and 21 May 1975. Discharge volume, suspended sediment concentrations and soluble and sediment (NH4oAc exchangeable) Ca, Mg and K concentrations were measured each time. Significantly decreased pK – 1/2p (Ca + Mg) values occurred in watersheds with more impermeable soils and greater corn and small grain land uses. The relatively higher stream K concentrations were attributed to K-enriched surface runoff and leaching loss from K fertilization of corn and small grains. Seasonal variations in the Gapon exchange constants or exchangeable cations associated with suspended sediment probably related to variation in surface soil erosion. Estimated annual soluble cation losses varied by watershed but were highest from watersheds with the largest proportions of corn, cultivated land and calcareous soils.

Observed Suspended Sediment Profiles under the Effect of Single and Double Peaked Wave Spectra

2006 ◽  
Author(s):  
M. R. Delgado Blanco ◽  
M. Olabarrieta Lizaso ◽  
A. Giardino ◽  
R. Banasiak ◽  
R. Verhoeven ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Wave Spectra ◽  
Sediment Profiles
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