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Título

Runoff and sediment yield in a semi-arid environment: the effect of land management after farmland abandonment

AutorLasanta Martínez, Teodoro ; García-Ruiz, José María ; Pérez-Rontomé, Carmen ; Sancho Marcén, Carlos
Palabras claveRunoff
Sediment yield
Farmland abandonment
Microcrust
Land-use changes
Semi-arid environments
Ebro Depression
Fecha de publicación2000
EditorElsevier
CitaciónCatena 38(4): 265-278 (2000)
ResumenThis paper deals with the evolution of abandoned fields in semi-arid environments. The study has been carried out in the Central Ebro Depression, NE Spain, where large areas traditionally cropped with cereals alternating with fallow have been recently set-aside, following the agrarian policy of the European Union. Most of the information has been obtained using a rainfall simulator on 220 m2, open plots, reproducing six possible land-uses: control plot 1 (abandoned), control plot 2 (abandoned, adding chemical fertilizer), cereal, fallow land, fallow land with organic fertilizer and fallow land with chemical fertilizer. The results obtained show that abandoned land produces a very quick response to precipitation, high peak flows and runoff coefficients, and a shallow wetting front, confirming the effects of the low density of plant cover and the development of a microcrust. Fertilizing fallow land plots increases the penetration of the wetting front, with moderate impact on the other hydrologic parameters. The study demonstrates that (i) surface runoff is controlled by the addition (or not) of fertilizer; and (ii) sediment concentration is mostly controlled by ploughing.
Versión del editorhttp://dx.doi.org/10.1016/S0341-8162(99)00079-X
URIhttp://hdl.handle.net/10261/114920
DOI10.1016/S0341-8162(99)00079-X
ISSN0341-8162
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