Alessio Nicosia , Francesco Giuseppe Carollo , Costanza Di Stefano , Vincenzo Palmeri , Vincenzo Pampalone , Vito Ferro
{"title":"陆上流动阻力：综述","authors":"Alessio Nicosia , Francesco Giuseppe Carollo , Costanza Di Stefano , Vincenzo Palmeri , Vincenzo Pampalone , Vito Ferro","doi":"10.1016/j.earscirev.2024.104949","DOIUrl":null,"url":null,"abstract":"<div><div>Shallow water flows over rough natural hillslopes contribute to interrill erosion and floods. The friction factor, that describes the hydraulic resistance, is particularly important for modeling soil erosion and transport processes. The present review focuses on the Darcy-Weisbach friction factor <em>f</em> for both large and small-scale roughness conditions and addresses the effects of rainfall intensity, vegetation cover, and sediment transport on overland flow resistance. All the studies on rainfall effect agree regarding the increase of the friction factor with rainfall intensity for the laminar flow regime and their independence for flows characterized by Reynolds number higher than a threshold varying between 800 and 2000. The analysis of the literature allows for concluding that <em>f</em> always increases with vegetation cover. Moreover, <em>f</em> (or its component due to sediment transport) increases with sediment concentration, slope, and Reynolds number, while it decreases with increasing values of Froude number and dimensionless sediment diameter. Finally, the focus areas for future research are highlighted.</div></div>","PeriodicalId":11483,"journal":{"name":"Earth-Science Reviews","volume":"258 ","pages":"Article 104949"},"PeriodicalIF":10.8000,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Overland flow resistance: A review\",\"authors\":\"Alessio Nicosia , Francesco Giuseppe Carollo , Costanza Di Stefano , Vincenzo Palmeri , Vincenzo Pampalone , Vito Ferro\",\"doi\":\"10.1016/j.earscirev.2024.104949\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Shallow water flows over rough natural hillslopes contribute to interrill erosion and floods. The friction factor, that describes the hydraulic resistance, is particularly important for modeling soil erosion and transport processes. The present review focuses on the Darcy-Weisbach friction factor <em>f</em> for both large and small-scale roughness conditions and addresses the effects of rainfall intensity, vegetation cover, and sediment transport on overland flow resistance. All the studies on rainfall effect agree regarding the increase of the friction factor with rainfall intensity for the laminar flow regime and their independence for flows characterized by Reynolds number higher than a threshold varying between 800 and 2000. The analysis of the literature allows for concluding that <em>f</em> always increases with vegetation cover. Moreover, <em>f</em> (or its component due to sediment transport) increases with sediment concentration, slope, and Reynolds number, while it decreases with increasing values of Froude number and dimensionless sediment diameter. Finally, the focus areas for future research are highlighted.</div></div>\",\"PeriodicalId\":11483,\"journal\":{\"name\":\"Earth-Science Reviews\",\"volume\":\"258 \",\"pages\":\"Article 104949\"},\"PeriodicalIF\":10.8000,\"publicationDate\":\"2024-10-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Earth-Science Reviews\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0012825224002770\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Earth-Science Reviews","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0012825224002770","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Shallow water flows over rough natural hillslopes contribute to interrill erosion and floods. The friction factor, that describes the hydraulic resistance, is particularly important for modeling soil erosion and transport processes. The present review focuses on the Darcy-Weisbach friction factor f for both large and small-scale roughness conditions and addresses the effects of rainfall intensity, vegetation cover, and sediment transport on overland flow resistance. All the studies on rainfall effect agree regarding the increase of the friction factor with rainfall intensity for the laminar flow regime and their independence for flows characterized by Reynolds number higher than a threshold varying between 800 and 2000. The analysis of the literature allows for concluding that f always increases with vegetation cover. Moreover, f (or its component due to sediment transport) increases with sediment concentration, slope, and Reynolds number, while it decreases with increasing values of Froude number and dimensionless sediment diameter. Finally, the focus areas for future research are highlighted.
期刊介绍：
Covering a much wider field than the usual specialist journals, Earth Science Reviews publishes review articles dealing with all aspects of Earth Sciences, and is an important vehicle for allowing readers to see their particular interest related to the Earth Sciences as a whole.
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