Influence of freeze-only and freezing-thawing cycles on splash erosion
| Autor: | Seyed Hamidreza Sadeghi, Mohammad Bagher Raeisi Mohammad Bagher Raeisi, Zeinab Hazbavi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Hydrology
Splash 010504 meteorology & atmospheric sciences Freezing thawing Soil Science 04 agricultural and veterinary sciences 01 natural sciences Simulated rainfall lcsh:TA1-2040 Loess 040103 agronomy & agriculture Land degradation Erosion 0401 agriculture forestry and fisheries Environmental science Soil strength Soil conservation lcsh:Engineering (General). Civil engineering (General) Agronomy and Crop Science 0105 earth and related environmental sciences Nature and Landscape Conservation Water Science and Technology |
| Zdroj: | International Soil and Water Conservation Research, Vol 6, Iss 4, Pp 275-279 (2018) |
| ISSN: | 2095-6339 |
| Popis: | Soil erosion is recognized as one of the most important types of land degradation in the world particularly in many developing countries like Iran. Water erosion is initiated by splash erosion triggered by raindrop impact. Understanding the process of splash erosion under freezing and thawing conditions is essential to unravel soil erosion mechanisms under temperate conditions leading to appropriate planning of soil and water conservation projects. The present study aimed to study the individual effects of freeze-only as well as freezing-thawing cycle on splash erosion in a loess soil from an erosion prone area in mountainous northern regions of Iran. The study was conducted under laboratory conditions using erosion plots. The erosion plots were subjected to freeze only and freeze-thawing treatments by simulating cold conditions using a large cooling compartment system specifically manufactured for this purpose. The splash erosion under a designed simulated rainfall (1.2 mm min−1 for 30 min) was then measured as upward, downward and net splash erosion in splash cups. The results showed that freeze only decreased the upward, downward and net splash erosion by 0.81 ± 0.43, 0.82 ± 0.29 and 0.85 ± 0.23% while freezing-thawing cycle decreased splash erosion to 0.93 ± 0.83, 0.61 ± 0.43 and 0.57 ± 0.36%. This may be attributed to temporary increase in soil strength and stability or surface sealing during freezing process leading to reduced splash erosion. Keywords: Experimental plots, Freezing effects, Rainfall simulation, Soil detachment process |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|