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The effect of selected physiographic factors on dissolved gypsum transport by simulated runoff on gypsiferous soils

AuthorsNavas Izquierdo, Ana
KeywordsRunoff simulation
Gypsum transport
Gypsiferous soil
Ebro River Basin
Issue Date1990
PublisherCatena Verlag
CitationCatena 17 (4-5): 409-416 (1990)
AbstractSimulated rainfall with intensities of 48 and 58 mmh-1, representing those found in heavy storm events in the middle Ebro valley, have been applied to gypsiferous soils of varying characteristics and slope. An attempt to assess the effect of selected physiographic factors on the transport of dissolved gypsum by runoff is presented in this paper. The 51 field experiments carried out on 1.25 m × 1.25 m plots have shown high variability in the gypsum yield among the diverse situations tested. The gypsum load transported by runoff ranges from 5 to 40 gm-2 per hour. Transport of dissolved gypsum is positively related to rock outcrop and slope, and rainfall intensity produces a small dilution effect. Dry soil conditions and higher percentages of plant cover favour higher gypsum concentrations. Runoff is undersaturated in gypsum with values ranging from -1.4 to -0.3. The highest gypsum yields are recorded in Dystric Leptosols, followed by Gypsic Calcisols (lithic phase) and then Gypsic Calcisols.
Publisher version (URL)http://dx.doi.org/10.1016/0341-8162(90)90042-C
Identifiersdoi: 10.1016/0341-8162(90)90042-C
issn: 0341-8162
Appears in Collections:(EEAD) Artículos
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