The Role of Surface Sealing Caused by Subsequent Rainfall in the Runoff Components at the Kojour Watershed Mazandaran
| Autor: | Reza Zarei, Abdulvahed Khaledi Darvishan |
|---|---|
| Jazyk: | perština |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | پژوهشهای آبخیزداری, Vol 33, Iss 4, Pp 77-93 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2981-2313 2981-2038 |
| DOI: | 10.22092/wmej.2020.123725.1161 |
| Popis: | Degradation of aggregates due to rain drop impacts leads to surface sealing formation, roughness reduction, filling of soil pores and consequently increase in the runoff rate and soil loss. Despite the effect on aggregate breakdown and formation of surface sealing, rainfall sequence is among the factors that have been less studied so far. Effect of three subsequent rainfalls and surface sealing formation were investigated on runoff and soil loss components in small experimental plots under simulated rainfalls with the intensities of 50 and 90 mm h-1 and duration of 15 min after time to runoff, in two soil types of sandy-loam and sandy-clay-loam, respectively. The results indicated that soil surface seal was formed by subsequent rainfalls in both of the studied soil textures and rainfall intensities. The rainfall sequence had the significant effect (P |
| Databáze: | Directory of Open Access Journals |
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