The topographic threshold of gully erosion and contributing factors
نویسندگان
چکیده
The topographic threshold is based on the power relationship between area and slope widely applied in gully-erosion research; however, this requires further testing. Accordingly, Alamarvdasht Lamerd Fadagh Larestan regions Fars Province, Iran, were selected as case studies to explore for gullies. Thirty active gullies identified each study during field surveys, data describing land use cover, drainage areas, slope, physical chemical properties of soils assembled. Multivariate analysis was conducted using SPSS determine effects these factors. Using catchment gully, analyses explored critical controls gully development. results showed that surface runoff most significant effective factor areas. Sparse ground fine-textured soils, inappropriate contribute suggest S = 0.0192 A−0.159 headcut areas 0.0181 A−0.258 at outlets. corresponding values exponent β headcuts outlets − 0.15, −0.25, respectively. relationships 0.0143 A− 0.061 0.0073 A−0. 18, respectively, with 0.06 0.18. This provides a basis determining thresholds initiating Analyses factors provide clues improve management bare lands prevent initiation erosion.
منابع مشابه
Effect of incipient gullying mechanisms on topographic threshold conditions for gully initiation in southwestern Iran
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ژورنال
عنوان ژورنال: Natural Hazards
سال: 2022
ISSN: ['1573-0840', '0921-030X']
DOI: https://doi.org/10.1007/s11069-022-05254-6