Three hydro-seeding revegetation techniques for soil erosion control on anthropic steep slopes

Autor: José Ignacio Querejeta, J. Albaladejo Montoro, J. Alvarez Rogel, Eulalia Martínez Díaz, Victor Castillo
Rok vydání: 2000
Předmět:
Zdroj: Land Degradation & Development. 11:315-325
ISSN: 1099-145X
1085-3278
DOI: 10.1002/1099-145x(200007/08)11:4<315::aid-ldr394>3.0.co;2-4
Popis: Erosion control at low–medium radioactive waste disposal sites is an important concern. A study was carried out in El Cabril (Cordoba, Spain) on two 40 per cent anthropic steep slopes in order to test the effectiveness of hydro-seeding techniques for controlling soil erosion. Two groups of 10 m × 3 m plots were established. The treatments tested were: hydro-seeding with the application of vegetal mulch (VM); hydro-seeding with added humic acids (HA); hydro-seeding with vegetal mulch and humic acids added (VM + HA); and a control without hydro-seeding or soil amendment (C). Fifteen run-off producing rainfall events were recorded during the study period, with intensities ranging between 2 mm h−1 and 33·6 mm h−1. All treatments significantly reduced runoff and soil loss (p < 0·05). The VM+HA treatment was the most effective, reducing 98·5 per cent of total soil loss. The HA treatment (97·1 per cent reduction) was also more effective than the VM treatment (94·8 per cent reduction). A great reduction in runoff and sediment yield was observed in the treated plots during the first stages after hydro-seeding. This result may be attributed to the combined effect of: (a) the protection against raindrop impact due to the application of straw and mulch to the soil surface, and (b) a general improvement in the soil's structure brought by the organic amendments. Seven months after hydro-seeding, an increase in the density of the plant cover could be added to the beneficial effects mentioned above. Copyright © 2000 John Wiley & Sons, Ltd.
Databáze: OpenAIRE
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